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21 Development Permit 01-02 Castlegate Detention Pond 2270 Greens Prairie Dr W
L_J_A __ E_n~g~i_n_e_e_ri_n~g~& __ s_u_r_v_e~y~i_n:g~,-•n_c_. ____ ~------~~~----------......A'~ 2929 Briarpa rk Drive Suite 600 Houston , Texas 77 042-3703 April 19, 2001 Mr. Chad Eckelberg Cedar Ridge Ranch 327 Coshatte Road Belville, Texas 77418 Phone 713.953 .5200 Fax 713.953 .5026 ww w.ljae ngine ering .com Re: Construction of the Detention Pond and Channelization To Serve Castle Gate Communities City of College Station, Brazos County, Texas LJA Job No. 1649-0001 (14.1) Dear Mr. Eckelberg: Enclosed please find five (5) copies each of revised Plan Sheets number 6 and 8 of the referenced project. Please replace the existing sheets with these revised Plan Sheets. If you have any questions , please do not hesitate to call me. Wallace E. Trochesset, P.E. Sr. Project Manager WET/mdc Enclosure c : Mr . Wallace Phillips -Greens Prairie L. L. C. (w/plans) Mr. Frederick Colin, Jr. P.E . -CME Testing Engineer Inc. (plans) Mr. Ted Mayo, P.E. City of College Station Development Services (w/ plans) Mr. Dante Carlomagno -Carlomagno Surveying , Inc. (w/plans) 0 :\LAND\1649116490001\REV _CEDAR.doc I .. .,._. -. THE VALUES OF Cp , Ct, AND tp FOR THE SNYDER'S HYDROGRAPHS WHICH ARE CONVERTED TO CLARK'S HYDROGRAPH IN HECl ARE DERIVED FROM THE HYDRAULIC LENGTH OF THE TOTAL WATERSHED (L), THE HYDRAULIC LENGTH TO THE CENTROID OF THE WATERSHED (Lea), AND THE URBANIZATION OF THE WATERSHED AS DENOTED BY STRAIGHT LINES FROM THE OBSERVED VALUES AT THE 0% URBANIZATION AS TAKEN FROM A STUDY ABOVE 158 ON HUDSON CREEK, AND AN 80% URBANIZATION STUDY AS fAKEN FROM A STUDY ON CARTER CREEK ABOVE VILLA MARIA ROAD AT MANOR EAST MALL EAST SIDE BOUNDRY. THE V S FOR Ct AND 640 Cp ARE THEN TAKEN FROM A STRAIGHT LINE GRAPH BETWEEN THE POINTS .--SINCE THE GRAPH IS A STRAIGHT LINE THE Y=MX + B FORMULA FOR THE TWO PLOTS OF 640Cp AND Ct VERSUS URBANIZATION BECOMES Ct= 2 .05 -(.01563) U WHERE UIS THE PERCENT OF URBANIZATION OF THE WATERSHED Cp= .718 + (1.65/640) U BY COMBINATION OF THE VARIABLES USED IN THE DATA LABELED AS CARTERS CREEK PERTINENT UNIT GRAPH DATA--ONE CAN DETERMINE THAT THE VARIABLE tp WHICH IS SNYDER'S HYDROGRAPH STANDARD LAG IS GIVEN BY THE FORMULA tp=Ct{(L) (Lca)}0.3 6/<_ The FEMA FIS flows were detennined for projected future development at the time of the study. and each of the watersheds were computed at larger Urbanization than existed . A study of the urbanization used in the FIS study above shows a large increase in the urbanization of Carter Creek above Burton Creek. Carter Creek above Briar Creek was taken at 20 percent urbanized on a 10 .60 sq mile area. Briar Creek above Carter Creek is 60% urbanized on a 2 . 72 sq mi area. The section of Carter Creek below Briar but above Burton (1.52 sq mi) was essentially 0 urbanization but will be taken as 10%. Each of these numbers is larger than the actual and when combined would give an urbanization of Carter Creek above Burton Creek of: U = {.20(10.60 sq mi)+ .60 ( 2 .72 sq mi)+ .10 (1.52 sq mi)}/ (10.60 + 2.72 + 1.52) sq mi total area U = (2 .12 + 1.63 + .152)/14 .84 = 3 .90/14 .84 = 26 .3 % urbanized Please note that in the FIS study this was additionally increased to 40% Urbanization . Since the FIS study over half of the actual urbanization that has occured has occured since the detention pond requirements of the City of Bryan and College Station has been in effect. This ordinance reqmrement substantially impacts and reduces the urbanization calibration in the FIS study. From the observed maximum flood elevation for particular points in the project {Storm event reported to be a "200 year storm" by Veronica Morgan in a paper to the /'t:3l...f!. } which were below the predicted elevations for those locations as depicted by the FIS 100 year elevations and also below the elevations predicted from the existing condition run as submitted by MDG using the FIS predicted 100 year flows for ~he area. This indicates either 1 or a combination of 3 possible conditions; · 1) That the event was not a 100 year flood, 2) That the flows are still less than those predicted in the FIS study 3) That the mannings n used in the study are too large. In our study we indicated that we believed that the actual mannings n would be less than those shown though not by enough to reduce the flows to the level observed . Likewise we have stated that the FIS flows are probably larger than the actual flows currently going through the site . 0 0 10 ~20 '-../ 30 z 040 1----i ~50 tj 60 z <[ 70 (2Q ~80 ~ 90 100 Ct 0.5 1.0 1.5 1.9 - - - --·--- --- ---- - - - - ----- -- U= 0%J Ct=2.05J 640Cp=460 500 550 600 650 640 Cp I I I . CARTERS CREEK FLOOD PLAIN STUDY ----·--------···-_.,,---··· HYDR0LOGY •. 1. General.-This report submits for review and approval the hydro- logic data to be used in conjunction with flood plain management information stud."[.es on Carters Creek. Pfate 1 shows the :portion of the Carters Creek watershed considered i~ this study. I 2. Basin description.-Carters Creek lies in northwestern Brazos County between the Brazos and Navasota Rivers. The western sections of the watershed include the larger portions of Bryan and College '. Station, Texas. The stream rises approximately two miles north and ~ast of Bryan, and flows in a southerly direction for about 20 miles to its confluence with the Navasota River. '!he portion of the Carters Creek w~tershed included in this study has a drainage area of 42.80 square miles and is generally rectangula; in shape with an average width of about five miles an~ length of 0 about nine miles . Elevations range from approximately 380 feet msl i~ the upper northwest to about 230 feet msl in the south. -- -· -,----:-------------------------- --\J Bryan and College Station are the only communities of consequence in the watershed, occupying the higher elevations to the west. With I Texas A&M University at College Station, future urban growth, : especially in residential and supporting comnercial service areas, can be anticipated. Construction of alternate Highway 6 bypass is already influencing development toward the east and Carters Creek flood plain. 3. Climatology.-Carters Creek watershed lies in a region of temperate mean climatological conditions experiencing occasional extremes of temperature and rainfall of .relatively short duration. Climatological data recorded at the nearby airport and at College Station are considered indicative of conditions likely to prevail on the watershed. The annual precipitation at College Station is 38.76 inches. 'llle mean annual temperature is 67.3 degrees with mean maximum temperature of 95 degrees in July and mean minimum tempera- tures of 42 degrees in January. Recorded temperature extremes range from a maximum of 110 degrees to a minimum of minus 3 degrees • • 4. Stream gaging stations.-Two recording stream gages in the Carters Creek watershed were established in April 1968 by the U. S. Geological Survey for collection of hydrologic data pertaining to urban runoff studies. One gage for urban data was sited ; on Burton Creek and the other for rural data on Hudson Creek. A network of recording rain gages was also established for each stream gage. Locations of stream gages are shown on Plate 1. 5. Flood history.-There are --no flood records available except - for recent u. s. Geological Survey ·re"cords·: -- 0 I ' I '.I . i I , I I ! I I I l I ! -) ~) ... -> 6. Unit hydrographs.-Recorded flood hydrographs and rainfalls were available for several storms for Burton Creek at Villa Maria Road and Hudson Creek at Highway 158 (U. S. Geological Survey publication ~l CoID:Qilation and Analysis of Hydrolo~ic Data for Urban Studies in the Bryan, Texas, Metropolitan Area, 1969 aiidT970," w, ·D. Rob6TtiS). Unit hyd'rographs were developed oasel:l 'on reproduction of several observed flood hydrographs. Unit hydro- graph coefficients of Ct • 0.8 and 640 Cp z 590 were calculated for the approxilhately 80 percent urbaniTed Burton Creek watershed, while Ct a 2.05 and 640 Cp • 460 reproduced observed floods on the rural (near zero percent urbanization) watershed of Hudson Creek. Based on these data, curves of urbanization versus both 640 Cp and Ct were developed. 'lhese curves, included as Plate 2, were used to determine Ct and 640 Cp values af~er estimates of future urbaniza- ;ion had been made. 'llle Carters Creek watershed was divided into 14 areas of interest , and, utilizing coefficients from the urbanization versus 640 Cp and Ct curves, synthetic half-hour unit hydrographs ~ere developed for each of the areas. Pertinent data for these hydrographs are given in Table l ,and locations are shown on .Plate 1. 'lhe unit hydrographs are found in the inclosed . computer printouts. · ---------------------· . . . 7. Initial loss and infiltration index.-Based on results of the unit hydrograph studies for Hudson Creek, initial losses, and infil_. tration rates adopted for Carters Creek are tabulated below. Frequency Initial loss Infiltration rate in years in inches in inches per hour 2 1.00 0.10 10 0.90 0.09 25 0.80 0.01 50 0.10 0.05 100 .0.60 0.04 SPF 0.50 0.03 8. 100-year flood.-'llle 100-year peak discharges for the selected locations were determined by subtracting the initial loss and infiltration rate from the rainfall and applying the excesses to the appropriate unit hydrographs. 'lhe 100-year rainfall was based/) on data from the J]. S. Weatfi.er Bureau "Technical Paper No. 4,9, C-30. cQ .~inf all Frequency Atlas of the United States" (T.P. 40) and Lf D . adjusted for drainage area by use of depth-area-duration curves (()7Jet $i.. included in figure 15 of that report. Rainfall distribution by 5{l ;ti' 6-hour periods was determined in accordance with EM 1110-2-1411 'A-I( (fivil Works Engineer Bulletin No. 52-8). 'lhe hourly rainfall arrangement is an empirical fit of several rainfall curves drawn manually from T.P. 40. Hourly rainfalls are divided evenly into half-hour rainfall except for the maximum hour which· is split according to 'll'.40. Rainfall and rainfall-excess of 100-year fre- quency are shown for each area in the inclosed comp~er printouts. I [ I 9. Standard project flood.-In accordance with Southwestern Division's recommendations, the standard project flood was developed as outlined in EM 1110-2-1411 prior to 1965. 'Ihe 24-hour index value of 17.30 inches for 200 square miles was adjusted for duration and drainage area. A transposition coefficient of one was used in accordance with Section 2-03b of EM 1110-2-1411. 'Ihe standard project storm ·rainfall and rainfall-excess are shown in the inclosed computer printouts. 10. Peak discharges and coincident flows.-Table 2 presents peak discharges and coincident flows for sel~cted locations on the Carters Creek watershed. 'lbe peak values were read from discharge-frequency curves based on discharges computed for a range of frequencies. Flow values for the tributaries of Carters Creek, listed in the computer printouts of flood hydrographs at•the time of the peak on Carters ' Creek above each tributary, were used as coincident flows. Carters treek coincident flows with the peaks on the tributaries were derived from the printouts in a similar manner. . --· -. ·--.. --... .. ~ 11. Comparison of peak discharges.-'nle maximum flood discharges of record experienced in Texas are indicated on Plate 3 together with ·the curves derived by Myer and .C.re,ger. 'lbe peak discharge for the standard project flood and 100-year .fr~quency flood fo.r .C~rte~s Creek below its confiug.n~~ w:i,t;h Bee Creek and Burton Creek at Villa Maria Road are shown for c0mparative purposes • • 0 / . 1 l .I [ I l f.. • ;,· .. ~-: .. 1 C· :"' -'( := ~ 1 ... ~:-:~ ;: ~ : • ~< r.~ ?-::. 7f ~ 3 r. G;-:-;-....... , ,-.... T .... ·· r:---·. , -·1·-c···-1 ,,,_ .. ,.._ t /r ' --·r ·-.:ffF€C.,TIVG' -. , •. _. ~.: ~: ,. r: .... ·. ,._ .. : _, , ... · J L ·, '·: ·. r ·--.·.: ·' .... ~. ·'·. . -.• : .. ,-:'(<A;1NF-AU... . "L:°'.~lMt:!. •· "l-.-·-i ·-..· r.J rJ>1:& L:.05::~ ~" · TOTAL. f?.AttJ~At..L : · •.:.~)•.';: --r::-2. c.636 _o • .ooo • } '00 ~· I • 5 i." .. :: ::.ooo 2.soo 3.000 3.500 ~.ooo .lh 500 ~ •• 000 5.soo f· «~·'.! f'.• 6·500 7. o•<· f c S C ·:: e.o ;~l~ 8, S·:··~ ~.o : .. c 1 c . O t :Ci I J , c :: .:· 11.s::r; 1 2. oi:.-: I 3, r '.'.". J 3·. Sr ·C· l 4· o:·;· ! 4. 5 .-r . J" ~i I o: •I; J s' 5 ' ... . 1 6. : .;· .... . I 6 • -S . :·: 1:.000 '"J' 5 0 0 18•0 0 0 :s.so~ 19.006 f 9 •Sb..:> z.o.o c.o 2 0. so o '21 .. oo 0 2.i .5 0 0 22..0 0 0 z 2 . so o 2 ·,:. • 6 CO 21.s c o '2·'!-· '.)C' 0 ?.. 4-• S.: D 2 $ • O(J C.l - • () . c . r:! • c . ,.. '··· . (. . G. · .. : . c .. ,_ .. ~ ·'· 426· 597. 724· ... -826. -?t 9. } 005. ~ 036· l l 6'7. 1 ~:-,o. ~ I.· 65. ~ S64· J 672 . ! 909. 2289. 2.9 ! 7' 3 833· 60"13· 101'39· J I 7~9· j 006!. 7413. 51.1 o. 35<;'1, 2 338 · l 623· l l 75. 968· 7~fl. 62.7. 4-7 ~. 3 GS. l 7 4-1 C/0· ~4-. • 323 .. I 6:>! • ro3o. 2.0 4A·· · 13 ::,;. ... ~. 736· -4-2 2.; ~ r7 • ~ .L... i. -. .; ' I • ,-, . (. •. •.·.· c. c .. . . L • • ,.. • .. • . c. .:.., . t ••• r: • ' .. '. i-.. ... ' .. :" .. . :· . -·· !'. I., r:·. 03 6 c. as·! . G. OS! c.os1 C'·OS!_ .. • r ... os1 · o . 051 11106..ft C· • 064 (·. 064 r.:. 039 ~~. 020 c,.0200 ~-· 020 ·'!. r:.ozo C , O'ZO •· [· '020 c.azo Q.()~9 '.~.010 c.0'20 (·· 020 c .020 r .. o 20 C·. 02.6 c..020 ·~ .020 c.020 C., 0'2D '· • O~D -.. ozo '"·• 020 .-, ozo : .... 010 ( • 02.0 .-.• O'Z.0 · , O'Z.O ,._-.. 020 .• 0 2 0 :·.o"Z o ..• 0 7.0 .• 020 . -'0 1.0 • 01..0 . 020 ·0 '20 -• 0 7.0 r;.ooo · G. OC5 0 C·. 000 <~. 000 . o.ooo r, • ooo r.ooo 1,.000 G.ozs ·:. q96 r' o·a6 r.. 091 · ·~·. 09~ i·.Y I e> , ·~ • !. l CO c .126 C·. I '2~. r. • I +5 C , I 4-5 c.179 i.'·· I 70 o.i 94- o. 164 0.302 O·BO€> o. 531 o. 531 . I• 1 S9 3, 1 '.24- 0· 31 '3 Q, 3 I :3 o. 2.it ·T o. 2ti-r 0·077 0·077 O· 07 I Q. 071 o.o s s o. o si; 0: 0"5'3 o. 0 ·53 o. 0-t-1 0. 0 -t4- 0 • 04 ~ o.o4-t I 0.036 0.036, (). OS 1 o. OS I o. OSI Q; OSI Q. OSI 0 ~05 l ·o. 064 lo · 0·064 0·064 ·,· o. 064 O· 1 DG .. o. t 66 {). l \ 1 · o. l t 4 0· 138 0.-1.ss · O· ' 4'i3 ©• t 13 O•l bS O·IGS :_C> ~ l '!B ., D, 1 <}8 0. 20-i\- C • 2.0"\" . o. 3'2.S o ~ '.3ie· 6. SSJ a.St;! I· I 7-6 3 • I ..it4-. • O· 333 6· 3 33 o. Z{ll o. lb ·\ 0.09~ o .• oq ,7 6. 041 O• 6Ci I CJ.01s C>• 0 7 ~ O· 013 0001:, ()· 0 6tf o.o<:,<f 0, o G.f O · o G't- 1 1: .i I I ~ I J. \ : I !00-YR FLGS[ ~N C~RTrRs CR[EX J'..50VF. C:\1NFLIE>!CE ~·!I Ti-i r::.URT0\I FL0f'./!J HYf•f:'')(;F.f..?H OH~ o.sc.o o. q J. 1.cc.r,:.. G. :1. J • 5 :;.:.; 2.CiCC· 3.QC,(j 3.500 L..OOG "·sea ~ • OGt~ 5 • SGC• t.c.co • 6·5IJG 7.0oc 7.sco i::;. 000 8a50Co 9.000 9. S GC• !O·C·CO 1 s. sec J l • r,QO 11.s0c J2.GOG J2.~GC• 1 :: • •"': r:. r. 1 3· SGG J 4!. ::.c;.J l Li. 5::,G 1 s.01w 1 5. :;c: (i 16.GCi(~ l (·. 3t-:ir:· l '7.CCG J?.SG C ]::j.0("~ l ,:· • S:'.':·G J •; • C:':::"".· ? O • O..Q.C:._ Z.Ci. 50·..:· 21. oor: 21, Sor" zz.oor 22. Sor t3.oo :·: 23· ')O i.; 24· oo o:~ 24. soc 2 s. oo ::. '2 S. So ~: 26· 00·:· 26-< c;p · 21.qo .· o. (, o. ~c. . o. o. o. (j. o. o. o. o. -44. I l G • 21 .:'.;. 35 j • 5 I·?• G 75 • 1 [:(,/.,. l ~~s~. '1 c::::::. l 01 s. ~Ci l : • ~:?4:9. f-4~~. ?670· 3C42• 3~\5Ll• LiL;J r .. Sf; I·;• 7656. c; 4'::;:. l (' ';-:.~ I • 1 l 770. t I 9·:9, l i 640· l 091 3. 9959, 66':)3. 781 ! • 6794· 5861 I 503-'t"· 4'31 6. 3701. 31 so. 2.735. Z:) 4B • 2.bD ~,. • 53. 2(.G. t-37. ! 0 T:: , J L;55. 1 f.9 7. J 771. 1757· 1 6~9. J /.J72. l 2.? 5. ._-.o ;..l :· c; / • . ' 5°2'2. ~. 7(1. 21 7. 1 IL•·· l 1 ~. i::: ~~ • _,. , ~ .. L: f.· • .. ... ..) , . l (,. ! :: • I l • c; • ' . L/. 3. 3. z • 2. Cl. o. (j • FLD5 (i,GJf. o.c.:;r G· C•'i! OeC•'.3! o.::~.! P. r:· 5 1 G •CS 1 G • C·51 0. Q(.. ~·; Ci. c ;.;. Q. \jf ·" G • 03~· o.<:·~O 0 • C~:C n.c.2c lj .• r-~· •:· Q. r,:-.zr. 0 • C·2C. Ci. ;.;.c o·.-02c G·O~r·, c.ozc 0·02C'· r_:. oir:· c.ozr: G.ov; '..i. o~c r. • 02-G G, 02,ii 0. 02.0 Q• 02:~ G. 02C 0. oz.:-. c. oz:~ C·. ozr o.oz.~ O. 02r. ·~:. c2 ·:. c .oz:· r:.02\.. r;. 02: !"':. 02:. '·". 02.-. (: • 0'2. .- :: • 02 i" -. oz •: ,·~: • b 2 ;"'; r, •Ci :- a.Hach cd I EvF£c.T1vf fZA11-.iFAL1- pr. 0 • CC:t~ I.·. GC.G o.c:oo 0. l.·0(1 (' .• oc.c C•· r~r,(i r, •• Gt:C· G •CC"'-· C • r:°C1 C: c .• c.:2(. r::. 03(· G • C86l.· (j. 09 4 o.Co9A TOTAL- RA1t..IFAL..L R{· I ;,! o. !."3( OeC•3(. c. (15} r. ~51 r...051 o.r:=.:-1 r .. :.r;y c. r.f .• \ c-. C.f-4' C••1:-f4 C• r:~.4 G·1C6 r:-.. 1~6 c. ! J 4 o. ~ 1 4 0. I 1 2 r:.112 (,. 129 __ ('.J3~ c. 1 4 :; G • ! 29 G· I 45 G. l 4S G.!78 ti·l78 , o.1t()6 r .. y S6 Q.305 c.3os c,,544 i :::. 544 l • 3 l 1 2·31Z o. 326 (, .. 3'26 (•. 241 ('.. 2 41 ;».077 (°'. 0/ i c. 071 r.. 07 l r.os9 r·. o 59 :-.053 ~.05:3 ''•04t ;:. 044 :·. 01'~ :_·,, 0+1 -C.J4S G·!G'." G • 1 6~ (',., 98 c .. 1 9S 0 • 'l.Ob 0°206 o. ::2S . 6°32.5 6·S64 O·Sb4 l. 33! 2. 332. o. 346 O· 346 c. '261 O· 'l61 0.097 o.0CJ1 0.091 o. ~'11 0.019 b• 07'J O• D73 0.013 0·064 0·064 0·064 ~·664 Area: D,A, . L Lea . No, Watershed Location : (aq mi): (mi) (mi) 1 Carters Creek about 600 feet below Old Reliance Road 2,99 2.50 1.24 2 Carters Creek above conflu- ence with Briar Creek 10,60 7,05 4.48 3 Briar Creek above Villa Maria Road 1,08 1.61 0,68 4 Briar Creek above confluence with Carters Creek 2.72 4.13 2.40 5 Carters Creek above confluence with Burton Creek 14.84 8.43 5.04 ~ Burton Creek above Villa Maria Road .l,34 2,25 1,06 7 Burton Creek above confluence • with Carters Creek 7.26 5,07 2.66 8 Carter• Creek above confluence with Wolf Pen Creek 28.98 10.90 5,92 9 Wolf Pen Creek above Highways 6 and 30 1.43 1. 75 1.10 10 Wolf Pen Creek above conflu- ence with Carters Creek 3,26 4.98 3.12 11 Carters Creek above conflu- ence with Bee Creek 34.07 12,88 7, 10 12 North Fork Bee Creek above confluence with South Fork Bee~eek o.98 2,35 1.20 13 South ark Be'e Creek above confluence with North Fork Bee Creek 3~40 3,83 2.02 14 Bee Creek above confluence with Carter• Creek s. 73 7,70 4,26 TABLE 1 CARTERS CREEK v-;..:.;.. I'.. '" PERTINENT UNIT GRAPH DATA Sat : Urbani-l tp (Ll.c:a)0,3 (ft/mi) :z:a ti on C't): (hra) 1.40 19.68 10 2,66 2,80 11.34 20 4.87 1,01 42.15 95 0.58 2.00 17.10 60 2,24 3.10 9.49 40 4.43 1,30 30.77 95 0,74 2,19 20.00 80 1. 75 3,50 .-S,•31 45 . 4.73 1.21 33,59 90 0,7j 2,29 18.~5 90 1.49 3.89 7,65 40 5,56 1.36 '35,80 95 0,78 1.~ 13,00 30 ~.91 2.85 10.21 40 {t,08 Ct 1.90. 1.74 0.57 ... 1.12 1.43 0.57 0.80 1.35 0,65 0.65 1,43 0,57 1. 5.8 1.43 tr 640Cp (hre) ,475 0,48 490 0,89 614 0.11 557 0.41 525 0,81 614 0,13 590 0,32 533 0:86 605 0.14 605 0.27 I" 525 1,01 614 0.14 508 0,53 525 0,74 i r tR l (hra) 0,50 0,50 0,50 • 0,50 0,50 0,50 o.so 0.50 0,50 __ 0,50 0,50 0,50 0,50 0,50 tpr : qpr : Qpr (hrs) : (ch/sq mi): (cfs) 2.66 178.57 534 4. 77 102.73 1,089 0,68 902.94 975 . 2. 26 246.46 670 4.35 120,69 1,791 0,83 739.76 991 .l,80 327.78 2,380 4,64 114.87 3,329 0.88 687.50 983 1.55 390,32 1,272 5.43 96.69 3,294 0,87 705.75 692 2.90 175.17 596 4,02 uo,,o l, 140 ' .. TABLE 2 ----- • CARTERS CREEK PEAK DISCHARGES :Drainage: Area area Peak Frequency Discharges in cfs No. Watershed Location :(sq mi) 2-yr 10-yr . 25-yr 50-yr 100-y~ SPF .. 1 Carters Creek about 600 feet below Old Reliance Road 2,99 1,280 2, 110 2,240 2,900 3,200 5,270 2 Carters Creek above conflu- ence with Bria~ Creek 10.60 2,600 4, 710 5,850 6,750 7,650 12,800 3 Briar Creek above Villa Maria Road 1.08 1,600 2 ,50.o ; 2,970 3,300 3,650 5,650 4 Briar Creek above confluence ' . i with Carters Creek 2. 72 1,490 2,440 I .• 2,940 3,300 3,680 5,940 --- Carters Creek coincident flows i with Briar Creek (Peak) 2,010 2,490 . :,3 260 , 3,820 4,520 7,240 Briar Creek coincident flows with Carters Creek (Peak) 530 640 . 840 f 980 1,150 2,220 -==> Carters Creek just below con- fluence with Briar Creek 13.32 3,870 5,730 ' 7,100 8,170 9,380 15,550 5 Carters--Creek above conflu- ence with Burton Creek 14 .84 4,370 7,550 9,250 10,500 11, 900 19,820 6 Burton Creek above Villa Maria Road 1.34 1, 710 2, [50 3,250 3,650_ -4,020 6_, 200 7 Burton Creek above con- fluence with Carters Creek 7.26 5,050 7,950 9,350 10,500 11,600 19,050 ----~----' ·------·----'~-·--.. -"-~-----·----------"'~-- TABLE 2 (CONTINUED) • :Drainage: Area: area Peak Frequency Discharges in No. Watershed Location :(sq mi) 2-yr 10-yr 25-yr 50-yr Carters Creek coincident with Burton Creek (Peak) 1,310 3,090 . 4,140 4,870 Burton Creek coincident flows ~ with Carters Creek (Peak) 600 1,240 1,680 1,990 Carters Creek just below con- fluence with Burton Creek 22.10 6,450 11,040 13,520 15,530 , 8 Carters Creek abo~e confl~- ence with Wolf Pen Creek 28. 98 7,800 13,800 16,900 19,250 9 Wolf Pen Creek above Highways 6 and 30 1.43 1,750 2,800 · 3,320 3, 710 10 Wolf Pen Creek above conflu- ence with Carters Creek 3.26 2,420 3, 940 4,700 5,260 Carters Creek coincident flows with Wolf Pen Creek (Peak) 2,089 5,230 7, 130 '!"' 8,460 Wolf Pen Creek coincident flows with Carters Creek (Peak) 80 250 390 490 c:. Carters Creek just below conflu- ence with Wolf Pen Creek 32.24 7,880 14,050 17,290 19,740 11 Carters Creek above confluence with Bee Creek 34.07 7,880 13,900 17,200 19,900 cfs 100-yr SPF 5,820 .. -9,000 2,390 4,920 17, 720 29,070 21,800 36,830 4,100 6,320 5~85 0 9,660 10, 190 15,650 620 1,130 22,420 37,960 22,600 38,380 \. .. TABLE 2 (CONTINUED) • :Drainage: Area: area Peak Freguency Discharges in cfs No. Watershed Location : (sg mi~ 2-yr ·10-yr 25-l:r 50-yr 100-yr SPF 12 N~rth Fork Bee Creek above confluence with South Fork Bee Creek 0.98 1,230 1,950 2,300 2,590 2~50 4,420 ' 13 South Fork Bee Creek above confluence with North Fork Bee Creek 3.40 1,420 2,360 2,850 3,230 3,600 5,890 14 Bee Creek above confluence with Carters Creek 8.73 2,800 4,800 5,800 6,630 7,450 12,390 .. • North Fork Bee Creek coinci-• dent flows with South Fork Bee Creek (Peak) 40 140 200 _240 300 550 South Fork Bee Creek coincident with North Fork Bee Creek (Peak) 270 720 970 1,140 1,360 2,020 Bee Creek just below confluence of North and South Forks Bee Creek 4.38 l,500 2,6 70 3, 27,0 3,730 4,210 6,440 Carters Creek coincident flows with Bee Creek (Peak) 6,300 9,840 14,620 16,940 19,630 35,090 c::::>-·Bee Creek coincident flows with Carters Creek (Peak) 2,310 3,940 4,860 5,590 ~,_400 10,990 I i Carters Creek just below con flu-i ence with Bee Creek 42.80 10,290 18, 020 ' 22,340 25,730 29,530 49,370 • ' ' • 0 '-ii: • 0 ----·· . . . ' Q . -·---------·· ·-·------' ,A v ------------- ~ ~ ~-v COLLlGl STATION DEVELOPMENT PERMIT PERMIT NO. 100002 DP-CASTLEGATE DETENTION POND FOR AREAS INSIDE THE SPECIAL FLOOD HAZARD AREA RE: CHAPTER 13 OF THE COLLEGE STATION CITY CODE SITE LEGAL DESCRIPTION: Timothy J. Crowley 204.8 Ac . Tk. R. Stevenson Vol. 1415 ; Pg. 074 DATE OF ISSUE: January 10 , 2000 OWNER: CROWLEY, TIMOTHY J 1301 MCKINNEY HOUSTON, TX 77010-3034 SITE ADDRESS: 2270 GREENS PRAIRIE RD W DRAINAGE BASIN: Spring Creek VALID FOR 12 MONTHS CONTRACTOR: TYPEOFDEVELOPMENT: FULLDEVELOPMENTPERMIT SPECIAL CONDITIONS: All construction must be in compliance with the approved construction plans All trees must be barricaded , as shown on plans , prior to any construction. Any trees not barricaded will not count towards landscaping points. Barricades must be l' per caliper inch of the tree diameter. The Contractor shall take all necessary precautions to prev ent silt and debris from leaving the immediate construction site in accordance with the approved erosion control plan as well as the City of College Station Drainage Policy and Design Criteria. The Owner and/or Contractor shall assure that all disturbed areas are sodden and establishment of vegetation occurs prior to removal of any silt fencing or hay bales used for temporary erosion control. The Owner and/or Contractor shall also insure that any disturbed vegetation be returned to its original condition , placement and state. The Owner and /or Contractor shall be responsible for an y damage to adjacent properties , city streets or infrastructure due to heavy machinery and/or equipment as well as erosion, siltation or sedimentation resulting from the permitted work. Any trees required to be protected by ordinance or as part of the landscape plan must be completely fenced before an y operations of this permit can begin. In accordance with Chapter 13 of the Code of Ordinances of the City of College Station , measures shall be taken to insure that debris from construction, erosion , and sedimentation shall not be deposited in city streets , or existing drainage facilities. I hereby grant this permit for development of an area in s ide the special flood hazard area. All development shall be in accordance with the plans and specifications submitted to and approved by the City Engineer in the development permit application for the above named project and all of the codes and ordinances of the City of College Station that apply . Date / w /:2 -' 0/ DATE, TIME FAX NO ./NAME DURATION PAGE (S) RESULT MODE TRANSMISSION VERIF I CAT IO N REPOR T 02/05 09:38 95901041 00:00:37 02 OK STANDARD ECM TIME 02/05/2003 09:39 NAM E COCS DEVELOPMENT SER FA X 9797543495 TEL 9797543570 SER .# BROE2J341073 The Ci!f of College Station, Texas =!!!!!.~.-==-=-~ .. -==--==-~~ .. -=E=m::!!!!b!!!"~a~c~i~ng~th~P.==. ::::Past, Ex_ploring the Future. P.O. Box 9960 • February 4, 2003 Timothy Crowley 1301 McKinney Houston, TX 77010-3034 1101 Texas Avenue • College Station, TX 77842 • (979) 764-3500 www .ci .collP.eP..1>t<\tion .tx .u s Re: Castlegate Regional Detention Pond Warranty Inspection Dear Mr. Crowley, As I believe you are aware, the Castlegate Regional Detention Pond was completed and accepted by the City of College Station on February 21 1 2002. Included with tllis accciptance, was a one year maintenance bond provided by the contractor on the project, Cedar Ridge Ranch. After a physical inspection of the site1 the following areas will need to be repaired to meet the operational and maintenance criteria of the basin. 1. The four·foot wide pilot channel flumes along the bottom of the pond are covered with silt and mud. These flumes need to be cleaned out and the material removed from the basin or placed where it can be determined that -.. --•--..... __ 1.-.......... -...... -1.&...-----~-·-&---' ___ _, __ ._ __ , ...... ___ J--~----•----' The Ci!Y of College Station, Texas Embra ci ng t h e Past, Ex ploring th e Futu re . P.O. Box 9960 • 1101 Texas Avenue • Coll ege Station, TX 77842 • (979) 764-3500 February 4 , 2003 Timothy Crowley 1301 McKinney Houston, TX 77010-3034 www. ci.college-stati on. tx . us Re: Castlegate Regional Detention Pond Warranty Inspect ion Dear Mr. Crowley, As I believe you are aware, the Castlegate Regional Detention Pond was completed and accepted by the City of College Station on February 21 , 2002 . Inc l uded with th is acceptance , was a one year maintenance bond provided by the contractor on the project , Cedar Ridge Ranch . After a physical inspection of the site, the following areas will need to be repaired to meet the operational and maintenance criteria of the basin . 1. The four-foot wide pilot channel flumes along the bottom of the pond are covered with sil t and mud. These flumes need to be cleaned out and the materia l removed from the basin or placed where it can be determined that erosion has lowered the constructed grades below design level. 2 . There are several areas where the slopes have eroded significantly due to lack of vegetative cover, and where material has sloughed into the basin detention area. These slopes need to be re-graded to plan dimensions and re-vegetated. 3 . There are several areas along the constructed channels where significant erosion has occurred. These slopes need to be re-graded to plan dimensions and re-vegetated. 4 . The majority of the area is still lacki ng in vegetation. These areas will need to be vegetated to prevent continued erosion. H om e of Texas A &M University .. As part of the continuation of this Development Permit, The City requires that these issues must be addressed prior to release of the warranty bond, which currently expires 2/21 /03. Because it is unlikely that erosion protection measures can be established before the February 21st warranty expiration date, even if the grading work was completed, we suggest the following course of action. It is important that the siltation of the basin be removed as soon as possible to restore the detention capacity of the facility. It is also important that the other areas are re-graded and some form of erosion preventing vegetation or covering be installed and established . We propose that this work be completed prior to the end of February. We th~n propose that the warranty and accompanying bond be extended for a 6 month period of time to allow for the establishment of protective vegetation and maintenance of the erosion control measures. We ask that you contact us at your earliest convenience to discuss your preference in handling these issues, and whether you would desire a site meeting to go over the concerns described above. Thank you for your cooperation and assistance. Sincerely, 6f!lfi Brett McCull , P. E. Xe: Kelly Templin Mark Smith, P.E. Wallace Phillips Wallace Trochesset, P.E. MAINTENANCE BOND STATE OF Texas BOND NO . AI 6160369 ------------------- co U NTY 0 F _M_on_t~g~o_m_er_,Y...._ ___ _ KNOW ALL MEN BY THESE PRESENTS : THAT WE, Cedar Ridge Ranch as Principal, hereinafter called "Contractor," and the other subscriber hereto as Surety, do hereby acknowledge ourselves to be held and firmly bound to __ _ _ G;;..;;r;...:;e..;;.e.;.;;.ns;;;....;;P..;;;r.;.a=ir;;;.;i:;:..:· e"-','--"'-L=LC~-----------1· in the sum of Five Hundred Ninety Two Thousand, Two Hundred Sixty Five and 10/100----------Dollars ($592,265.10) for the payment of which sum well and truly to be made to the said Obliges and its successors, the said Contractor and Surety do bind themselves. their successors and assigns jointly and severally . The conditions of this obligation are such that: WHEREAS, the said Contractor has entered into a contract with Greens Prairie, LLC for: Construction of the Detention Pond and Channelization to serve Castle Gate Communities, College Station, Brazos County, Texas Job No. 16 4 9-0001 all such work to be done as set out in full in said contract and the plans and specifications therein referred to, NOW, THEREFORE, if the said Contractor shall repair, replace and restore any and all defects in, or damages , to said work occasioned by , and resulting within One ( 1 ) year from and after the day of the acceptance of said work from defects in materials furnished by, or workmanship of the Contractor, in performing the work covered by said contract , then this obligation shall become null and void; otherwise to remain in full force and effect. SIGNED, sealed and dated this __ l.0..::3'-"'t=h __ day of December Attest:~ (/Jt:!f:#.- V . 2 O_fil_ Ce /l Mt c rn ~y-Tn-Fact rn 39'v'd SlJ'v'C!lNrn 'v' fl ...,.._,._, U•\J'-1• 1,...,,1.'-'&.. '-'""'IWlf""",_.I. I HARTFORD, CONNECTICUT POWER OF ATTORNEY ORIGINALS OF THIS POWER OF ATTORNE"k;' ARE PRINTED ON BLUE SAFETY PAPER WITH TE.'\L INK. DUPLICATES SHALL HAVE THE SAM E FORCE AND £fF£CT AS AN ORIGINAL ONLY WHEN ISS UE D I N CONJUNCTION WITH THE ORIGINAL. . KNOW ALL MEN BY THESE PRESENTS : Th nt the Gul f Insurance Company. i corpornrio11 duly organ ized under the laws of the Stare of Connecticut. ha ving its principul office in che cir y o f Irvi ng , Te xns . pu rsu!l.nt to rhe follo wing reso lution . adopted by th e finance & f.xe.:ur ive Comm ittee of the .Board of Di.rectors of rh e said Comp1my on rhc: \Orh day of .o.u~ust. L 993 . to wit : "RESOLVED . thl\t the Pre si de nt Executiv e Vice Pres ident or nn y Senior Vic e President of the Compan y ~hall hove authoriry ro nll1kc. execute 3nd deliver a Po wer ~f Attorney constir un ng ns Attom ey-in-Fnct . such persons. firm;. or corporations as mny be selected from time co time : and any ~uch .'\.ttorney-in-Ftl.cc m11.y be remo ved au d the aut horit )' gran ted liim revo ked by the President. or any Elcecuci~e Vice Pr~siaenr. or. any Senior Vice Presiden r. or by th e Board of Direc to rs or by the Fin lillce and Execucive Committ~e of the Board of Directors. RE.SOLVED . t h ~t no rhi.ng in chi ~ Power of Attorney shaU be construed a.s 11 grant Jf :iuthority to che :momey(S)-in-foct to sign. e:i:e cu te . acknowledge , deliver or oth- :rw i;e issue a policy <)r pol ic ie!: ct insurance on betinl f of Gulf In surQnce Company. RESOLVED . thm che .;ignacure of the President. Executive Vice Pre sidcnt ·or u1y Sonior-Vlcc President. nnd th~ Seal of the Company may be a!'ftxed to an y such Powe r of A.rcor ney or un y c·crrifici.ce relating thtrero by f(l.C~imile, an d any such powe rs ~o e~~uted and certifi ed by fo.:simile signacure and facsimile seal ~lu ll be valid and bin<.l.ing up on the: Company in the future with respect co any bon d a nd focumencs reJacing to such bonds to whic h chey are atcached ."~ ::iulf Ins urance Compan y does he reb~ make. con>ticuce and appoint ~8~~ER Al 9 3 4 513 3 r NAME . ADDRESS PRINCIPAL : CITY. STATE, ZIP Cedar Ridge Ranch 315 Coshatte Rd .. Bellville, TX 77418-9353 '-r EFFECT IV E DATE December 13, 2001 " r CONTRACT AMOUNT $ 592,265.10 ( BOND AMOUNT L$ 592,265 '.10 -·;..._;.,Gary Alexander, Richard H. Baker, Scott D. Chapman, Elaine Lewis, Roy E. Simmons ics true · Jnd lawfu l acrorney(s)-in-fncr. with full power and authority hereby confe-rred io it.S naml.}. pl .ice and scead. to sign. e:i:ecuce . acknowledge an d deliver in its behalf. <l l s urec y, any und all bonds and un de rt ak ings of s ure (y s hip. lllld to bind Gulf In suran ce Company thereby n~ fully and (0 the $ame extent uil if any bo'nds. u oder- cukings and documents relating to s uch bonds tu1d/or undertakings we re signed by th e duly authorized officer of che Oulf Insurance Compnny and all chc acts or said ~ctcimcy(.1)-in-fact . pursu anc re the authori ty herein given. are hen:by ratified and confirmed . The obligation of tJu: Com pany shall no t ex.cced three million (3 .0 00,00 0) dollar$. IN WITNESS WHEREOF, rhe Gulr lns1.1rance Compony ha9 caused these presents to be signed by any ofncer of the Company llnd iis Corporate Seal to bt hereto amxed . STATE OF NEW YORK COUNTY OF NEW YORK SS GULF INSURANCE COMPANY Lawrence P. LYHn iter Exe cutive Vice President On the 1st day of Oc tober, 2001 A.O .. before me came L;iwrence P. Minlter, known to me personall~· who b11ing by me duly sworn, did depose and say: that he re~ides in the County of Bergen . State of N!!w Jer~ey; that h11 is the £ncutivC! \'ice President of the Gulf Insurance · Company, the corporation described in and which exec uted the above instrument; that he knows the scol of sllid corporation ; that the seal affi:u~d to the ~aid instruments Is such cor- porate seal; that i t '4':t9 so affixed by order of the Board of Directors of said corporation and that he signtd his name. thereto by like order. STATE OF NEW YORK COUNTY OF NEW YORK SS c/w;. ~i-ANGin.;;-HA08~;-BEGAZ~ ~;y Notary Public, Sta.te of New York No . 01MA601.9988 Qu:iliHed In Kings County Commi ssio n Expires February .16. 2003 I. the undersil(ned. S~nior Vice President or the Gulf Cnsurancc Company. a ConMcticut Co rporation, DO HEREBY CERTIFY that the foree.oing and itt:iched POWER OF ATTORNEY remains in full fore @. - ,, •. ir 1iiiii1i1rn111·i1~m1~mr111 Dated the 13th day of December , 20 01 Al9345133 "1352784" :Ol6·Al l.10/200 1 l ~ ~-.~ (G<0~~· · Senior Vic e President PB 39\Jd s1:muNm 'ii'fl " ~ " ~ --.., I ) ~ ' ) Cf V COlllGl STATION DEVELOPMENT PERMIT PERMIT NO. 100002 DP-CASTLEGA TE DETENTION POND FOR AREAS INSIDE THE SPECIAL FLOOD HAZARD AREA RE : CHAPTER 13 OF THE COLLEGE STATION CITY CODE SITE LEGAL DESCRIPTION: Timothy J. Crowley 204.8 Ac. Tk. R. Stevenson Vol. 1415 ; Pg. 074 DATE OF ISSUE: January 10 , 2000 OWNER: CROWLEY, TIMOTHY J 1301 MCKINNEY HOUSTON, TX 77010-3034 SITE ADDRESS: 2270 GREENS PRAIRIE RD W DRAINAGE BASIN: Spring Creek VALID FOR 12 MONTHS CONTRACTOR: TYPEOFDEVELOPMENT: FULLDEVELOPMENTPERMIT SPECIAL CONDITIONS: All construction must be in compliance with the approve d construction plans All trees must be barricaded, as shown on plans , prior to any construction. Any trees not barricaded will not count towards landscaping points . Barricades must be 1' per caliper inch of the tree diameter. The Contractor shall take all necessary precautions to prevent silt and debris from leaving the immediate construction site in accordance with the approved erosion control plan as well as the City of College Station Drainage Policy and Design Criteria. The Owner and/or Contractor shall assure that all disturbed areas are sodden and establishment of vegetation occurs prior to removal of any silt fencing or hay bales used for temporary erosion control. The Owner and/or Contractor shall also insure that any disturbed vegetation be returned to its original condition , placement and state . The Owner and/or Contractor shall be responsible for any damage to adjacent properties , city streets or infrastructure due to heavy machinery and/or equipment as well as erosion , s iltation or sedimentation resulting from the permitted work . Any trees required to be protected by ordinance or as part of the landscape plan must be completely fenced before an y operations of this permit can begin. In accordance w ith Chapter 13 of the Code of Ordinances of th e City of College Station , measures shall be taken to insure that debris from construction , erosion , and sedimentation shall not be deposited in city streets, or existing drainage facilities. I hereby grant this permit for development of an area inside the special flood hazard area. All development shall be in accordance with the plans and specifications submitted to and approved by the City Engineer in the development permit application for the above named project and all of the codes and ordinances of the City of College Station that apply . Administrator/Representative Date ' , WA Engineering & Surveying, Inc. 2929 BriarpaiX Drive Phone 713 .953.5200 Suite 600 Fax 713 .953.5026 Houston , Texas 77042·3703 www.ljaengineering .com February 20, 2002 lVfr. Ted Mayo, P .E . Assistant City Engineer City of College Station Development Services 1101 Texas Avenue College Station. Texas 77842 Re Castlegate Regional Detention Pond LIA Job No. 1649-0001 (11.0) Dear Mr. Mayo: REVIEWED FOR COMPLIANCE FEB 2 1 2002 COLLEGE STATION ENGINEERING Based on review o.fthe as-built topographic information supplied by the contractor, Cedar Ridge Ranch, the referenced project appears to be constructed in general accordance with the plan 's grades and elevations and should hydraulically function as designed. We are basing our acceptance of the project on the as-built information provided and a final walk through of the project. We did not provided continual inspection services during construction of this project. We have attached the one-year maintenance bond as supplied by Cedar Ridge Ranch for your use. It will be the responsibility of the Developer to notify the City thirty (3 0) days prior to the end of the one-year maintenance period, so an inspection can be made. This letter serves as notice of completion for the reforenced project. Please contact me at (713) 953-5232 if you have any questions or comments. Wallace E. Trochesset, P .E. Senior Project Manager Attachment c : Wallace Phillips, Greens Prairie, LLC Chad Eckelberg, Cedar Ridge Ranch 0 :\LAND\1649\1649000 l \notlceofcom.doc MAINTENANCE BOND STATE OF Texas BOND NO . AI 6160369 ~-----~~--~ COUNTY 0 F _M_o_nt_,g~o_m_er_.y'------ KNOW ALL MEN BY THESE PRESENTS: THAT WE, Cedar Ridge Ranch as Principal, hereinafter called "Contractor," and the other subscriber hereto as Surety, do hereby acknowledge ourselves to be held and firmly bound to __ _ -'G~r._.e ..... e .... ns--..,;;P...;;;r.;;;;a=i~r1=· e::....:•;__::_L=L..::..C ______ ____.. in the sum of Fi Ve Hundred Ninety Two Thousand, Two Hundred Sixty Five and 10/100----------Dollars ($592,265.10) for the payment of which sum well and truly to be made to the said Obligee and its successors, the said Contractor and Surety do bind themselves, their successors and assigns jointly and severally . The conditions of this obligation are such that: WHEREAS, the said Contractor has entered into a contract with Greens Prairie, LLC for: Construction of the Detention Pond and Channelization to serve Castle Gate Communities, College Station, Brazos County, Texas Job No. 1649-0001 all such work to be done as set out ln full in said contract and the plans and specifications therein referred to, NOW, THEREFORE, if the said Contractor shall repair, replace and restore any and all defects in, or damages, to said work occasioned by, and resulting within One ( l ) year from and after the day of the acceptance of said work from defects in materials furnished by , or workmanship of the Contractor, in performing the work covered by said contract, then this obligation shall become null and void; otherwise to remain in full force and effect. :;y· ~eaf ;;dated this -~13:....;;t=h __ day of December Attest: '/ftJLtp~ Ce (/ .+...~:14--"~........,~---- . 20_fil rn 39\td S18\1~1NO::l \tfl ...,.,..,._, II•'""""' lr"I•'-'~ "'""l•lrl""\1• I HARTFORD, CONNECTICUT ' POWER OF ATTORNEY ORIGlNALS Of nus POWER OF ATTORNEY ARE PRINTED ON BLUE SAFl'.TY PAPER WITH TEAL INK. DUPLICATES SHALL HAVE THE SAME FORCE A1""D EFFECT AS AN ORIGINAL ONLY WHEN ISSUED IN CONJUNCTION WITH THE ORIGINAL. KNOW ALL MEN BY THESE PRESENTS: Thnt the Gulflnsurance Compan y. i corpormio11 duly organ ized under the laws of the State of Connecticut. having its principal office in the city of l('Ving , Texas . pursu!lnt to the following resolution. ~dopred by the finance & w..:utiv e Committee of the Board of Directors of the said Company on rhe 10th day of Au~ust. 1993 . to wit : ''RESOLVED . 1h1u the President Execucive Vice Presicltnt or on y Senior Vice President of the Company ~hall have authoricy to mt1kc. execute 3nd deliver a Power ~f Attorne y constituting 11s Attorney -in-Fact . such perSons . finm . or corponnions as ITlllY be selected from time co lime : and ony such Altorncy-in-Fllet may be removed lud che authorit)' granced him m·oked by the President. or any faecurive Vice Pr~sie!ent or. any Senior Vice President. or by rhe Board of Direccors or by the FinllnCe and Executive Committee of the B1.>ard of Direetors . . RESOLVED. thut nothi.ng in chis Power of Attorney shoU be construed as D gran! Jf :iuthority to the :momey(S)-in-fuct to sigti. execute. acknowledge , deliver or ot h- !rwi>e is~ue a policy ~1r policie~ of insurance on betialf of Gulf Insurance Company. RESOLVED. thar the .;ign:nure of the President. E;o;ecurive Vice Pre s idenr ·or 1ny Sonior-Vlce President. llnd the Seal of !he Company may be affL-c:ed to any such Power of A.tto rriey or un y ccrtifii::;.te relating thereto by foc~irnile. and any such powers so ~:-:ecuccd and certified by facsimile signarure und facsimile seal ~llall be valid and bin<.iing upon rhtl Company in the fucure with re ~pect to any bond and facumenlS rela1ing 10 such bl1nds co which 1hey are attached :~ '.iulfln~urance Company d0es hereby make. consricute and appoinl ~e~~ER Al 9 3 4 513 3 , NAME.ADDRESS PRINCIPAL: CITY, STATE, ZIP Cedar Ridge Ranch 315 Co.shatte Rd .. Bellville, TX 77418-9353 \.. , EFFECTIVE DATE December 13, 2001 " I' CONTRACT AMOUNT $ 592,265.10 " ( BOND AMOUNT L$ 592,265'.10 _;..._;..Gary Alexander, Richard H. Baker, Scott D. Chapman, Elaine Lewis, Roy E. Simmons ltS rrue · :ind !awful acrorney(s)-in-fncr. with full power and au1hori1y hereby confe"rred ia its no.ml}. place and scead . to sign . ex:ecuce. acl.:no111!edge and deliver in its beh~!f. as surely, any und all bonds and undercakiogs of surecyship. <illd 10 bind Gulf Insurance Company thereby as fully and co the $11me excent 11s if any bo'nds , under- wkings and documents relnting co such bonus and/or undertakings were signed by the duly nu1hori2ed officer of che Gulf Insurance Compln~ and all the llClS or said QttOmcy(s)-in-fact . pursuaat ro the authority herein given . arc hereby ratified and confirmed . The obliitlltion of the Company sliall not c!x,cc:ed three million (3 .000,000) dollars . IN WITNESS WREREOF. rhe Gulf lns11rance Comprany ha9 caused these p~sents to be signed by any omcer of !he Company and its Corporate Seal to bt hereto amxed. . STATE OF NEW YORK COUNTY OF .NEW YORK SS GULF lNSURANCE COMPANY LP~ Lawrence P. Mlniter Execurl~e Vice Prtsident On the 1st day of October, 2001 A.O .. before me came Ll!wrence P. Minlter, known to me per5on:ill~· who biting by me duly sworn, did depose and say; that lie re~ide' in the County of Bergen. State of New Jotr~ey; that hot is the Encutivc Vice Pn!sident of the Gulf lnsurauce ·Company, the corporation described in and which extcuted the above instrument; that he knows the sen! of sa.id corporation; that the seal affix~d to the ~aid instruments Is such cor· porate senl; that it was so affixed by order of the Board of Directors of said corporation nnd that he sitined his name, thel'l!to by like order. 5TATE OF NEW YORK COUNTY OF NEW YORK SS ~~i-ANG1a:-HA0B~~BEGAZ~ 61:Y Notarv Public, St.ate of New York -No. OU'v1A60l9988 Qualif1ed In Kings County Commission Expires February 16. 2003 I. the undersi11ned. Senior Vice President or the Gulf fosurance Company. s Connecticut Corporation, DO HEREBY CERTIFY that the foregoing and attached POWER OF ATTORNEY remains in full force . Dated the 13th dayof December ,20 01 Al9345133 l0l6·Al !,l0/2001 J t>0 39\Jd EL 1SES5E 1L ... ' ,) ' I I .J ' .) FOR OFFICE USE ONLY CASl!: NO.; -CJ:;;_,,, DATE SUBMITTED: lf ,I)~ Pt1,vO DEVELOPMENT PERMIT MINIMUM SUBMITIAL REQUIREMENTS __ $100.00 Development Permit Application Fee. ~ __ Drainage and erosion control plan; with supporting Drainage Report two (2) copies each. ;t/' __ Notice oflntent (N.0.I.) if disturbed area is greater than 5 acres. LEGAL DESCRIPTION , ~~~-7 ~~~-~ Street Address S(;'/12 A«li/,(.,r£A t:;m;.¢ City C,u.<,Eff ,.5/Aif~j State ;r.J-: Zip Code Zl'% 'Y S E-Mail Address 6/d4ACE Q c4,rrLEGAr£ CU'f.)lllt /c. ') • Ct!Y'? Phone Number ~~ <£'1..3 -zY--10 Fax Number 979 -6'9'C?-I /9?0 PROPERTY OW?\'ER'S INFORMA TlON: Name 71/'f amr 7 · cfi~£d .. /.3l7/ /l'fc~pV'AI .J"T~~F/." Street Address .. r..ra2 <W'.EV!Pt?d rqNE/? City H&>«.rr.p.a/ . rt > State z:k Zip Code ilo1 C7 E -Mail Address T C /?OULE/.@ // C' .6pce/ .. Cp.M Phone Number VS -a.SI -LZ7 I ARCHITECT OR ENGINEER'S INFORMA TCON : Fax Number ZI.,$ -6'-51 - / Z1 5 Name L: t7:A EAl't9.4,,,/EE/l.pi!G ~..SP/tVE~.z;vG . .z;IC; ) j Street Address .:?£,R9 LVli«P.MK p/l. SIAffE XO City __.../4 ....... ~ ..... ~-'--""-d.c....;W:...-_______ _ State 7")'; Zip Code ZZe9'2--5ZoJ E-Mail Addre ss A/&'AA l,,1{fenp;~u:e.t 1fl: < caci Phone Number (b{) 9.£.3 -s·..zao Fax Number ___,(i.~4,-) .... ff_1~._5'._C? .... ~_f ________ ~ Application is hereby made for the following development specific site/waterway alterations: ACKNOWLEDGMENTS: I, __________ __.. design engineer/owner, hereby acknowledge or affirm that: The information and conclusions contained in the above plans and supporting documents comply with the current requirements of the City of College Station, Texas City Code, Chapter 13 and its associated Drairu\ge Policy and Design. · Standards . •"'a condition of approval of this permit application, I agree to construct the improvements proposed in this application ;x)rding to these documents and the requirements of ha ter of e College Station City Code. dz~~~ Property Owner(s) DEVELOPMENTPERMrt l of2 GO"d 9S :9T 00. 81 Jaa 9GOS£S6£U 6:Xt>.:J l:::l[l ---___________________ _____J ....... ~~~--,...~----- ,.: ·· ""'ERTIFICA TIO NS: (for proposed alterations within designated flood hazard areas .) ' A I. certify that any nonres idential structure on or proposed to be on this site as part of this application is designated to prevent damage to the structure or its contents as a result of flooding from the 100 year stonn. Engineer Date B. L certify that the finished floor elevation of the lowest floor, including any basement, of any residential structure, proposed as part of this application is at or above the base flood elevation established in the latest Federal Insurance Administration Flood Hazard Study and maps. as amended . -·-.-·~-... --· ···--. -:-···· ··--·-· .. ··--·---· Engineer Date ':9 I. certify that the alterations or development covered by this permit shall not diminish the flood~ capacity of the waterway adjoining or crossing this pe.nnitted site and that such alterations or development are consistent with requirements of the City of College Station City Code, Chapter 13 concerning encroachments offloodways and pffloodway fringes. Date f@ !, u.J:. I /6. c e..·---r;-~ c s(£_ l , do certify that the proposed alterations do not raise the level of the 100 year 'lfuoo ~Oil established in the latest Federal Insurance Administration Flood Hazaid Study. tt2 -r z-::_ C)/ J~ 1 )o I Engineer Date ~ ' .... ··---·-.·~ Conditioos· or Ccirninents as part of approval:----------------------- In accordaJ:Ke with Chapter 13 of the Code of Ordinances of the City of College Station. measures shall be t3ken to insure that debris from construction, erosion. and sedimentation shall not be deposited in city streets, or existing drainage facilities. All development shall be in accordance with the plans and specifications submitted to and approved by the City Engineer the above named project. All of the applicable codes and ordinances of the City of College Station shall apply. DBVELol'MENT PERMIT t>PERMn'.DOC 3/2419'J £O"d 9S:91 oo. 81 Jaa 2ol2 9GOS£S 6 £U 6 :X~.:1 NOll\flS 191110') -· -. Crowld ~c--p Pe__.r4-- April 19, 2001 DP-ol-o~ Plannin g , Environmental, and Regulatory Division Regulatory Branch SUBJECT : Project Number 199700476 Ms .· Heather Niles Environmental Scientist HNTB Corporation 100 Glenborough Drive , Suite 1300 Houston, Texas 77067-361'1 Dear Ms . Niles : This letter is in response to a February 22 , 2001, facsimile transmission request from Charles A. Ellison, P .C ., Attorneys at Law, concerning deed restrictions for Department of the Army permit 199700476 . The permit authorizes the discharge of dredged and fill material into waters of the United States associated with the construction of a mixed development by Mr. Tim Crowley, on a 735 acre property southeast of College Station along Spring Creek in Brazos County, Texas . We have reviewed the information provided and have determined that a modification to the permit is required. Permit Number 199700476 is modified as follows : 1. Replace the sentence in special condition 3 which reads "The permittee shall provide a copy of the recorded deed restriction to the USA CE by March 1, 200 l" to read "The permittee shall provide a copy of the recorded deed restriction to the USACE by August 1, 2001" This modification is effective immediately. All other terms and conditions of the original permit remain in fuII force and effect. If you have any questions concerning this letter, please contact Mr. Barry Osborn at the address above or telephone (817)978-3354. Sincerely, . Wayne A. Lea Chief, Regulatory Branch -· /-;??Z -d-3 1-77SI DEPARTMENT OF THE ARMY FORT WORTH DISTR I CT. CORPS OF ENGINEERS P . 0 . BOX 17300 REP LY TO A TT HJT 1011 OF Environmental Division Regulatory Branch· FORT WORTH . TEXAS 76 102-0300 January 18, 2001 SUBJECT: Project Number 199700476 Ms . Heather Niles Environmental Scientist HNTB Corporation 100 Glenborough Drive, Suite 1300 Houston, Texas 77067-3611 Dear Ms . Niles: Mr. Tim Crowley is hereby authorized under Section 404 of the Clean Water Act to discharge approximately 5,250 cubic yards of dredged and fill material in waters of the United States associated with the construction of an approximately 735-acre mixed-use development in accordance with Permit Number 199700476. A copy of the permit is enclosed. To use this permit , the person responsible for the project must ensure that the work is conducted in accordance with the terms and conditions of the permit. We caution you to submit revised drawings to us for approval prior to construction should any changes be found necessary in either the location or plans for the work. Approval of revised plans may be granted if they are found not contrary to the public interest. This permit should not be considered as an approval of the design features of any structure authorized or an implication that such construction is considered adequate for the purpose intended. It does not authorize any damage to private property, invasion of private rights , or any infringement of federal, state, or local laws or regulations. We appreciate your interest in our nation's water resources, and your cooperation in complying with our regulatory program. If you have questions in the future, please contact Mr. Barry Osborn at the address above or telephone (817)978-3354. Sincerely, ~'""-a 3/fl - WayneA.Lea Chief, Regulatory Branch Enclosures -' -. Copies Furnished I with enclosure: Mr. Mark Fisher 401 Coordinator -2- Standards and Assessment Section (MC-150) Texas Natural Resource Conservation Commission P.O. Box 13087 Austin, Texas 78711-3087 Mr. Rollin MacRae Texas Parks and Wildlife Department 4200 Smith School Road Austin, Texas 78744 Mr. Thomas J. Cloud, Jr. Field Supervisor U.S. Fish and Wildlife Service Stadium Centre Building 711 Stadium Drive East, Suite 252 Arlington, Texas 76011 Ms. Rebecca Weber Chief, Marine and Wetlands Section (6WQ-EM) U.S. Environmental Protection Agency, Region 6 1445 Ross A venue Dallas, Texas 75202 .. DEPARTMENT OF THE ARMY PERMIT Permittee Mr. Tim Crowley Permit No . 199700476 Issuing Office Fort Worth District NOTE : The term "you" and its derivatives, as used in this permit, means the permittee or any future transferee . The term "th is office" refers to the appropriate district or division office of the Corps of Engineers having jurisdiction over the permitted activ ity or the appropriate official of that office acting under the authority of the commanding officer. You are authorized to perform work in accordance with the terms and condit.ions specified below . Project Description: To discharge approximately 5,250 cubic yards of dredged and fill material into water of the United States associated with the construction of an approximately 735-acre mixed-use development. The development will adversely affect approximately 5.89 acres of waters of the United States, including approximately 7,200 feet of stream channel. Work will include the construction of an earthen channel in Spring Creek which is 30 feet wide at the bottom. Construction will also include box culverts at road crossings and modifications to existing tributaries. To compensate for unavoidable adverse impacts, the permittee will implement a mitigation plan that includes the preservation of an approximately 33-acre riparian area. Project Location: The 735-acre project site is located southwest of Highway 6 and Prairie Road, along Spring Creek and associated unnamed tributaries, at the southern edge of the city of College Station, Brazos County, Texas. The permit area is near UTM coordinates 762282.50 East and 3383523.97 North (Zone 14) on the Wellborn 7.5-minute USGS quadrangle map in the USGS Hydrologic Unit 12070103. Permit Conditions: In accordance with attached Sheets 1-12 of 12 and ·Texas Natural Resource Conservation Commission Section 401 Water Quality Certification, Pages 1-3 of 3, dated July 27 , 2000. General Conditions : 1. The time limit for completing the work authorized ends on December 31, 2003 . If you find that you need more time to complete the authorized activity, submit your request for a time extension to this office for consideration at least one month before the date is reached. 2 . You must maintain the activity authorized by this permit in good condition and in conformance with the terms and conditions of this permit. You are not relieved of this requirement if you abandon the permitted activity, although you may make a good faith transfer to a third party in compliance with General Condition 4 below. Should you wish to cease to maintain the authorized activity or should you desire to abandon it without a good faith transfer, you must obtain a modification of this permit from this office, which may require restoration of the area . 3 . If you discover any previously unknown historic or archaeological remains while accomplishing the activity authorized by this permit, you must immediately notify this office of what you have found. We will initiate the Federal and state coordination required to determine if the remains warrant a recovery effort or if the site is eligible for listing in the National Register of Historic Places . ENG FORM 1721, Nov 86 EDITION OF SEP 82 IS OBSOLETE. (33 CFR 325 Apptndi.x A)) 4. If you sell the property associated with this pennit, you must obtain the signature of the new owner in the space provided and forward a copy of the pennit to this office to validate the transfer of this authorization . 5. If a conditioned water quality certification has been issu ed for your project, you must comply with the conditions specified in the certification as special conditions to this permit. For your convenience, a copy of the certification is attached if it contains such conditions. 6. You must allow representatives from this office to inspect the authorized activity at any time deemed necessary to ensure that it is being or has been accomplished in accordance with the terms and conditions of your pennit. Special Conditions : SEE PAGE 4 (Special Conditions) Further Information: 1. Congressional Authorities: You have been authorized to undertalce the activity described above pursuant to: ( ) Section 10 of the Rivers and Harbors Act of 1899 (33 U.S.C. 403). (x) Section 404 of the Clean Water Act of 1972 (33 U.S.C. 1344). ( ) Section 103 of the Marine Protection, Research and Sanctuaries Act of 1972 (33 U .S.C. 1413). 2. Limits of this authorization. a . This pennit does not obviate the need to obtain other Federal, state, or Joc3.l authorizations required by Jaw . b. This pennit does not grant any property rights or exclusive privileges. c. This pennit does not authorize any injury to the property or rights of others. d. This permit does not authorize interference with any existing or proposed Federal project. 3. Limits of Federal Liability. In issuing this pennit, the Federal Government does not assume any liability for the following : a. Damages to the pennitted project or uses thereof as a result of other permitted or unpennitted activities or from natural causes. b. Damages to the permitted project or uses thereof as a result of current or future activities undertalcen by or on behalf of the United States in the public interest. c. Damages to persons, property, or to other permitted or unpermitted activities or structures caused by the activity authorized by this permit. . d. Design or construction deficiencies associated with the permitted work. 2 e. Damage claims associated with any future modification, suspension, or revocation of this pennit. 4 . Reliance on Applicant's Data : The determination of this office that issuance of this pennit is not contrary to the public intere s t was made in reliance on the information you provided . 5. Reevaluation of Perrajt Decision. This office may reevaluate its decision on this permit at any time the circumstances warranL Circumstances that could require a reevaluation include, but are not limited to, the following: a . You fail to comply with the terms and conditions of this permit. b. The information provided by you in support of your pennit application proves to have been false, incomplete, or inaccura te (See 4 above). c. Significant new information surfaces which this office did not consider in reaching the original public interest decision . Such a reevaluation may result in a determination that it is appropriate to use the suspension, modification, ,and revocation procedures contained in 33 CFR 325. 7 or enforcement procedures such as those contained in 33 CFR 326.4 and 326 .5. The referenced enforcement procedures provide for the issuance of an administrative order requiring you to comply with the terms and conditions of your permit and for the initiation of legal action where appropriate. You will be required to pay for any corrective measures ordered by this office, and if you fail to comply with such directive, this office may in certain situations (such as those specified in 33 CFR 209.170) accomplish the corrective measures by contract or otherwise and bill you for the cost. 6 . Extensions . General condition 1 establishes a time limit for the completion of the activity authorized by this permit. Unless there are circumstances requiring either a prompt completion of the authorized activity or a reevaluation of the public interest decision, the Corps will normally giv!! favorable consideration to a request for an extension of this time limit. Your si~re below, as permittee, indicates that you accept and agree to comply with the terms and conditions of this permit. / 1-. MA ~~ 1 / 10 I OU (PERMlfl1iE) ~ / ) (DATE) Tim ¢rowley U This permit becomes effective when the Federal official, designated to act for the Secretary of the Army, has signed below . (DISTRICT ENGINEER) Gordon M. Wells Colonel, Corps of Engineers When the structures or work authorized by this permit are still in existence at the time the property is transferred, the terms and conditions of this permit will continue to be binding on the new owner(s) of the property. To validate the transfer of this permit and the associated liabilities associated with compliance with its terms and conditions, have the transferee sign and date below. (TRANSFEREE) (DATE) 3 Spec ia l Conditions Permit Number 199700476 1. The permittee shall implement and abide by the mitigation plan included in the "Mitigation Plan for the Crowley Property in Gollege Station, Brazos County, Texas, Project Number 199700476" by HNTB Corporation , dated December 7, 2000. Completion of all elements of this mitigation plan is a requirement of this permit. 2 . The permittee shall submit a final written compliance report to the USACE within 30 days after the completion of all construction and mitigation work that includes the following: a. a statement that the authorized work and required mitigation was done in accordance with the USACE authorization, including all general and speC:ial conditions; b. a summary of all construction and mitigation activities that occurred associated with the project, including documentation of the completion of all work and compliance with all terms and conditions of the permit; c. a comparison of the post-construction conditions of the project area to the pre -construction conditions of the area; d. a detailed description of all impacts to waters of the United States; e. a map showing the final configuration of restored, enhanced , created and preserved waters of the United States, including wetlands; f. The final topographic elevations of the project; g. a discussion about whether disturbed areas, such as borrow ditches, road embankments, stream banks, road crossings, and temporary impact areas are revegetating adequately and not suffering erosion damage; and h. photographs and maps as appropriate to illustrate the information presented. 3. The permittee shall dedicate in perpetuity by deed restriction, as a stream riparian and wetland mitigation area, the approximately 33-acre mitigation area identified in the mitigation plan referenced in special condition 1. The only exceptions to the deed restriction shall be easements in existence or proposed on date of this letter. The mitigation area shall not be disturbed, except by those activities specifically provided for in the approved mitigation plan or in the special conditions for this permit. Unless otherwise specified, livestock grazing, mowing , and similar activities are not allowed. The permittee shall survey the mitigation area, develop an appropriate deed restriction for the surveyed area, submit the draft deed restriction to the USACE for review and approval, and record the USACE approved deed restriction with the County Clerk. The permittee shall provide a copy of the recorded deed restriction to the USACE by March 1, 2001 . The restriction shall not be removed from the deed or modified without written approval of the USACE and conveyance of any interest in the property must be subject to the deed restriction . 4 ' " ~1 ~~ ... ,. LOCATION Clotd t lt PURPOSE1 The purpose of this project Is to create o mixed use development to Include slnQle and m.iltl·foml ly res l dent Io I uses, corrrnerc Io I uses, Inst l tut I one 1 E A R T Project Number 199700476 Sheet 1 of 12 E c H uses, and recreot I one I uses, as we II as l nteQroted A "t"qco /NTCRNA T/DNAL LTD. COMPAN Y nature preserves and storm water detention foci I ltles .. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~- SUBMITTED BY1 MA, TIM CROWLEY CROWLEY DEVELOPMENT CORPORATION CHEVRON TOWER 1301 MCKINNEY, SUITE 3500 AUCUS T, 1999 LJA PROJECT NO. ~591·9811 Sl TE1 735-ACRE CROWLEY TRACT LOCATION1 COLLEGE STATION COUNTY1 BRAZOS COUNTY, TE XAS LOCATION PURPOSE• The purpose of this project Is to create a mixed use development to Include slnQle and multl-fCYnl ly residential uses, conmerclol uses, Institutional E A Project Number 199700476 · : Sheet 2 of 12 E c H uses, and recreational use~. as wel I as lnteQroted A t-qcoJNT£RNAT/ONAL LTD. COMPANY nature Preserves and storm water detention foci l ltles.1----------------------- SUBMI TTEO BYa SITEa 735-ACRE CROWLEY TRACT ~ MR. TIM CROWLEY ~ CROWLEY OEVELOPMENT CORPORATION fo ~ CHEVRON TOWER .. • 1301 MCKINNEY, SUITE 3500 I' II ' AUCUST, 1999 LJA PROJECT NO. ~591·9811 LOCATION• COLLEGE STATION COUNTY• BRAZOS COUNTY, TEXAS ~·". ·. . · -'.'.·~~~~~i=ri i:~~rAcrs io~~~~~~s oF ·~~~~i-~-n ~A~E~. 1~c~~iNc JiiL\N~s·5:.i(-" ;:~~ .:. .. , '· .·.-··· AREA ON-SITE ACREAGE I:\IPACT I TYPE OF IMPACT WETLANDS A 0.48 0 .48 acre fill B 0.69 0 .69 acre fill c 0 .18 0.18 acre excavation . D 0.02 0 .02 acre fill E 0.18 0 .18 acre fi ll F 0 .19 0 .19 acre excavation G 0 .12 no impact no impact H 0 .65 no impact no impact I 0 .01 no impact no impact 1 0 .08 no impact no impact ' K 0 .20 0.20 acre fill L 0 .04 0 .04 acre fill M 0.45 0.45 acre draining N 0 .33 0 .33 acre draining Total Wetlands 3.62 Total Wetland Impacts: 2.76 1.61 acres fi ll , 0 .37 acre excavation , 0 .78 acre ' draining WATERS OF THE UNITED STA TES, EXCLUDING WETLANDS Spring Creek 2.35 0 .85 acre 0 .71 acres fill , 0 .14 acre draining Tributary I 0 .3 9 0.44 acre 0 .39 acres fill on-site , 0 .05 acres fill off-site to realign tributary Tributary 2 0 .59 0 .14 acre .09 acres fill, 0 .05 acres impoundment Tributary 3 0.12 no impact no impact Tributary 4 2 .06 0.12 acre 0 .09 acre fill, 0 .03 acre temporary excavation Tributary 5 0 .24 0 .02 acre 0 .017 acre fill, 0 .004 acre temporary excavation lmpoundment I 2.47 1.56 acre drain ing Total Waters , 8.22 Total Waters Impacts: 3.13 1.35 acres fill , 1.70 acres drained , 0 .05 acres excluding impoundment, 0 .03 acre temporary excavation wetlands Total Waters, I 1.84 TOTAL IMPACTS : 2 .96 acres fill , 0 .37 acres excavation, 2.48 acres includ ing 5.89 ACRES draining, 0.05 acres impoundment, 0 .03 acre wetlands temporary excavation The impacts listed on Table 1 are illustrated on sheets 4 through 8. EDITIO N OF SEP 9 1 IS O BSOL ETE Pro ject Numb er 1 997004 76 Sheet 3of 12 LOCATION 0 ''· 0. 25 SCALE IN MILES '.i ) - :1:=:" LEGEND WATERS OF THE UNITED STATES ADJACENT WETLANDS r-NATERS OF THE UNITED STATES) PROJECT BOUNDARY LINE - - - - -INSET BOUNDARY LINE z ..., Q ci. BASE MAP SOURCE• WETLAND DELINEATION EXHIBIT, "PRELIMINARY DETERMINATION OF THE WATERS OF THE UNITED STATES ANO WETLANDS OF THE APPROXIMATELY 735-ACRE CROWLEY TRACT," AUGUST 1997 . VERIFIEC BY THE USAGE ON FEBRUARY 18, 1998, PROJECT NUMBER 199700476. ... > 0 PURPOSE• ~ The purpose of this project ts to create a mixed use ~ development to Include slnQle ond mufti-family / residential uses, conmerclol uses, Institutional E A j·; R T Project Number 199700476 ~. . ' ! .. Sheet 4of12 ~ uses, and recreotlonol uses, as well as lnteQroted A~~t::Cl/NTE.,.. ...... ,.. ........................... ~ ~ nature preserves and storm water detention focllltles.1--~~~~~~~~-·~-·~~~~~~~~~~~~~~~ ~ SUBMITTED BY• SITE• 735-ACRE CROWLEY TRACT LOCATION• COLLEGE STATION COUNTY• BRAZOS COUNTY, TEXAS "" "' Q .., 0 !!= MA. TIM CROWLEY CROWLEY DEVELOPMENT CORPORATION CHEVRON TOWER 1301 MCKINNEY, SUITE 3500 EXISTING CONDITIONS AUCUS T, 1999 LJA PROJECT NO. 4591·9811 ., ,· ,_ <( ~ 0 <( 0 a: 0 ........ w \' .. Vl . .. ··o 0.. • 0 a: 0.. INSET B C EXHIBIT 8 > ,· .· I I --. ' I l/ ' 0 .< 0 c: u a: -< c: .:.. .,., ... z z w w w .3 ;:; \VI < w w z ...J . w 0.. -0.. . I! I •I ~--r--, i . I \. LOCATION 0 SCALE IN FEET 500 ' .. , ' .. :·\.~\ .J .. ;· .'I · .. , I •· ' ' I I . I , ' · --·-· ·-r ·r · t ·.;· I '~, : LEGEND ==::-:::-WATERS OF THE UNITED STATES I I 1ux m:><I WATERS OF THE UNITED STATES TO BE 1 l.IPACTEO WETLANDS TO REMAIN WETLANDS TO BE ll.IPACTED PROJECT BOUNDARY LINE - - - -INSET BOUNDARY LIN[ ----SANITARY SEWER BASE MAP SOURCE• WETLAND DELINEATION EXHIBIT, "PRELIMINARY DETERMINATION OF THE WATERS OF THE UNITED z STATES AND WETLANDS OF THE APPROXIMATELY 735-ACRE CROWLEY TRACT," AUGUST 1997. VERIFIED g BY THE USACE ON FEBRUARY 18, 1998, PROJECT NUMBER 1997004 76 • .c ~ PURPOSE• g: The purpose of this project Is to create a mixed use ~ development to Include slnQle and tn.Jltl-faml ly ~ residential uses, cornnerctol uses, lnstltutlonal E A R T ' -.~ ... Project Number 199700476 Sheet 5 of 12 : uses, and recreatlonal uses, as wel I as lntec;iroted A t'qc( .. : . .JN._ ____________ _. • nature .Preserves and storm water detention foci I ltles •. 1--~~~~~~~ "' ~ SUBM I TTEO BY• -MR. TIM CROWLEY ~ CROWLEY ·oEVELOPMENT CORPORATION c d CHEVRON TOWER f 1301 MCKINNEY, SUITE 3500 AUGUST, I 999 LJA PROJECT NO. -1591-9811 SITE• 735-ACRE CROWLEY TRACT LOCATION• COLLEGE STATION COUNTY1 BRAZOS COUNTY, TEXAS PROPOSED CONDITIONS l ·' •I --;_! \ ........ --.";\ ·-~ LOCATION 0 500' SCALE IN FEET INSET C < EXHIBIT 9 l ! I; t \;{ (\ .. ' i ~ INSET A ( EXH I 8 IT 7 l ' ·! . \' ' : ; i '.·.~--.' I I ' • i . (-··<'·. ' i i ~- L ol" =--_-_-___ -o-...-~;3 i C::l -...... i §I ~t g· ~i ::Ii U I I.a.I U j ~ 5 1 w L.r !!:: _, :o....1 '.Q. -·-~:------- --- I ·I 1::mn><I LEGEND WATERS OF THE UNITED STATES WATERS OF THE UNITED STATES TO BE IMPACTED WETLANDS TO REMAIN WETLANDS TO BE IMPACTED PROJECT BOUNDARY LINE INSET BOUNDARY LINE ----•SANITARY SEWER z ~ 0 BASE MAP SOURCE• WETLAND DELINEATION EXHIBIT, "PRELIMINARY DETERMINATION OF THE WATERS OF THE UNITED STATES AND WETLANDS OF THE APPROXIMATELY 735-ACRE CROWLEY TRACT," AUGUST 1997 . VERIFIE D BY THE USACE ON FEBRUARY 18, 1998, PROJECT NUMBER 199700476 . m !--~~~~~~~~~~~~~~~~~~~~~~~~~-.-~~~~~~~~~~~~~~~~~~~~~~~~~ ~ PURPOSE• a: Q. VI u / The purpose of this project Is to create a mixed use development to Include sln9le and m.iltl-foml ly resldentlal uses, comnerclal uses, lnstltutlonal E A R T -~ .. ··~ Project Number 199700476 Sheet 6of12 ; uses, and recreatlonal uses, os wel I os lnte9roted A~IJl::~/N ..................................... ... ~nature preserves and storm water detention facllltles.1--~~~~~~~~~~~~~~~~~~~~~~~~- 0\ ~ SUBMITTED BY• -MR. TIM CROWLEY ~ CROWLEY DEVELOPMENT CORPORATION ~ CHEVRON TOWER ~ 1301 MCKINNEY, SUITE 3500 AUCUS T, I 999 LJA PROJECT NO . 4591-9811 SITE• 735-ACRE CROWLEY TRACT LOCATION• COLLEGE STATION COUNTY• BRAZOS COUNTY, TEXAS PROPOSED CONDITIONS z 0 c INSET 0 ( EXHIBIT I 0 l INSET B ( EXHIBIT 8 l LOCATION 0 500' SCALE IN FEET LEGEND WATERS OF THE UNITEO STATES WATERS OF THE UNITED STATES TO BE IMPACTED WETLANDS TO REMAIN I I IY<>><I WETLANDS TO BE IMPACTED ------PROJECT BOUNDARY LI NE ----INSET BOUNDARY LINE PROPOSED DRAINAGE CHANNEL ---SANITARY SEWER J .. 0 c; .., -, c: .. -c: :>.. BASE MAP SOURCEs WETLAND DELINEATION EXHIBIT, 0 PRELIMINARY DETERMINATION OF THE WATERS OF THE UNITED STATES ANO WETLANDS OF THE APPROXIMATELY 735-ACRE CROWLEY TRACT,· AUGUST 1997. VERIFIED BY THE USACE ON FEBRUARY 18, 1998, PROJECT NUMBER 199700476. ~ PURPOSE• 0 a: a.. "' u / The purpose of this project Is to create a mixed use development to Include slnole and rrultl-foml ly residential uses, commercial uses, Institutional E A R T H. Project Number 199700476 Sheet 7 of 12 ;;; uses, and recreot I ono I uses, as we 1 I as I nteoroted A t-qco /NTE'""""'"""""'""""""'~ .. ~""----· ~ nature preserves and storm water detention focllltles.t--~~~~~~~~~~~~~~~~~~~~~~~~ ~ SUBMITTED BY• " -" "' 0 .., 0 a: a.. UR. T I I.I CROWLEY CROWLEY DEVELOPMENT CORPORATlON CHEVRON TOWER 1)01 MCKINNEY, SUITE 3500 Ul\tU"'Tl'\11 Tr'v1r "t"tl\1 '-\ AUCUS T, I 999 LJA PROJECT NO. 4591-9811 SITE1 735-ACRE CROWLEY TRACT LOCATION• COLLEGE STATION COUNTY1 BRAZOS COUNTY, TEXAS PROPOSED CONDITIONS z u Q d .L I . ~ :-L . ---·-··:;-: ___ _.: ..... ----· -· ----------·- r y \' I " I :1 . -1 ii LOCATION 0 SCALE IN FEET BASE MAP SOURCE• ~· ! soo · . :..-. : --~~ ... I.~·--~~~· .: --·:-= __ ::.-_-_ _ ,, ·--. .. -~ --·· -. ,..._. ,_, .. ~ - -:-= . .:·· . .__; ... ----,__' .. ~-·:;;:. ·:.-,;._; .·--··- --::_ -:--_.--,- -. ' l ; .. ( INSET C < EXHIBIT 9 l .·; '. LEGEND WATERS OF THE UNITED STATES WATERS OF THE UNITED STATES TO BE IMPACTED WETLANDS TO REMAIN I I l<<tt>I WETLANDS TO BE IUPACTED PROJECT BOUNDARY LINE - - - -INSET BOUNDARY LI NE PROPOSED DRAINAGE CHANNEL ----SANITARY SEWER WETLAND DELINEATION EXHIBIT, "PRELIMINARY DETERMINATION or THE WATERS OF THE UNITED STATES ANO WETLANDS OF THE APPROXIMATELY 735-ACRE CROWLEY TRACT," AUGUST 1997. VERIFIED BY THE USACE ON FEBRUARY 18 , 1998, PROJECT NUMBER 199700476 . ~ The purpose of th Is pro J ect Is to create a m I xed use . ·' · ..... ~ ...... ,...,._-... •· __________ ..,. ~ development to Include slnc;ile and irultl-foml ly E A R ~: ·i·H Project Number 199700476 PURPOSE• "' resident lo I uses, comnerclol uses, lnstltutlonol Sheet 8of12 ~ uses, and recreotlonol uses, as wel I as lntec;iroted A -t-q~.q}f'(Ti•--------------.. • nature preserves and storm water detention foci I ltles.1--~~~~~~~~~~~~~~~~~~~~~~~~~- ~ SUBMITTED BY• SITE• 735-ACRE CROWLEY TRACT LOCATION• COLLEGE STATION COUNTY• BRAZOS COUNTY, TEXAS .: MR. T It.I CROWLEY ::i CROWLEY DEVELOPMENT CORPORATION ~ CHEVRON TOWER ~ IJOI MCKINNEY, SUITE JSOO AUGUST, 1999 I .I& PRn.11::-rT NO . •<;q1.qR11 PROPOSED CONDITIONS 290 285 280 275 270 265 260 255 250 0+00 I +00 2+00 3+00 4+00 LEGEND 1.· ..• :::1 PROPOSED FILL LOCATION V//J PROPOSED EXCAVATION SCALE1 1· • 100' HOR . -FILL BELOW NORMAL I"• 10 ' VER . HIGH WATER MARK NOTE1 THIS EXHIBIT ILLUSTRATES A CROSS SECTION OF PROPOSED INFRASTRUCTURE IMPROVEMENTS ALONG SPRING CREEK. THIS CREEK, AS WELL AS TRIBUTARY I ANO A PORTION OF TRIBUTARY 2 ARE PROPOSED TO BE CHANNELIZED FOR THE PURPOSE OF CONVEYING STORMWATER DRAINAGE OFF THIS SITE . THIS REPRESENTS ~ A TYPICAL CROSS SECTION ALONG THESE AREAS PROPOSED FOR CHANNELIZATION. Q ci ~ PURPOSE1 ~ The purpose of this project Is to create o mixed use 8 development to Include single and multl-fomlly ProjectNumber199700476 E A R T H "' resldentlol uses, conmerclol uses, lnstltutlonol Sheet9of12 ;; uses, and recreot I ono I uses, as we I I as I ntegroted A t'qco_{NrE._ ___________ _ ! nature preserves and storm water detent I on foe I I It I es.t------------------------ ~ SUBMITTED BYa SITE1 735-ACRE CROWLEY TRACT LOCATION1 COLLEGE STATION COUNTY1 BRAZOS COUNTY, TEXAS -"' . "' Q .., 0 a: IL MR. TIM CROWLEY CROWLEY DEVELOPMENT CORPORATION CHEVRON TOWER llOI MCKINNEY, SUITE lSOO AUCUS T, 1999 LJA PROJECT NO. <1591-9811 TYPICAL CROSS SECTION 285 280 275 270 265 260 255 250 Q+OO TEXAS * LOCATION SCALE• 1 • • I oo· HOR. I" •IO ' VER. I +00 2+00 SPRING CREEK 120-,_ r...._N.ATURN.. GllOINO =-- .'.1 .· ·."· .. : .. ·,-......... / / I/ I/ ~~ 3+00 4+00 5+00 LEGEND I>.·. :.·>.:::I PROPOSED FI LL . ~ PROPOSED EXCAVATION - FILL BELOW NORMAL HIGH WATER MARK 6+00 z u Q NOTE• THIS EXHIBIT ILLUSTRATES A CROSS SECTION OF A PROPOSED ROAD CROSSING OF SPRING CREEK. ALTHOUGH THE NUMBER OF BOX CULVERTS VARIES, THIS ILLUSTRATES A TYPICAL CROSS SECTION OF SEVERAL ROAD CROSSINGS PROPOSED FOR THIS DEVELOPMENT. ~ ~P-U_R_P_O_S_E-,-------------------~----------L-~--""'------------ ~ The purpose of th Is pro J ect Is to create o m I xed use .•C="-', S development to Include sln<;ile and rultl-fomlly E A R T ProjectNumber199700476 ,,, resldentlol uses, conmerclol uses, lnstltutlonol Sheet 10of12 ;; uses, and recreot I ono I uses, as we I I as I nte<;iroted A "rqco (N ~ nature . preserves and storm wot er detent I on foe I I It I es.J _____ .:_:~=.::.:.:~=========~~~ ~ SUBM I TTEO BY• .. _ MR. TIM CROWLEY ~ CROWLEY DEVELOPMENT CORPORATION ~ CHEVRON TOWER ~ 1301 MCKINNEY. SUITE 3500 AUCUST, 1999 I .II PROJECT NO . -4591-<IRll SITE• 735-ACRE CROWLEY TRACT LOCAJION1 COLLEGE STATION COUNTY• BRAZOS COUNTY, TEXAS TYPICAL CROSS SECTION r 285 280 Nl!A "8' 275 ,~rY-i..-~ r----r--- 270 265 260 0+00 285 280 275 270 265 260 6+00 LOCATION SCALE• 1• •100' HOR. 1· •I 0' VER. --~--· ~ "~ I +00 2+00 Ml A "8' 7+00 8+00 ~~~-I\ \ ~ -------~ 3+00 4+00 5+0_0 NATUR.11. CllaJND-r\ - -~ .:(.:.·;. z ·If~ 9+00 . 10•00 I 1+00 LEGEND I' .. : : o-:::::1 PROPOSED f' I LL ~ PROPOSED EXCAVATION - f'ILL BELOW NORMAL HIGH WATER MARK NOTE• THIS EXHIBIT ILLUSTRATES A CROSS SECTION Of' PROPOSED f'ILL TO BE PLACED IN WETLAND AREAS A AND B z f'OR THE PURPOSE Of' ROAD CONSTRUCTION. THIS REPRESENTS A TYPICAL CROSS SECTION THROUGH WETLAND g AREAS WHICH ARE PROPOSED TO BE FILLED. d ~-----------------------..------------------------~ PURPOSE1 ~ The purpose of this project ts to create a mixed use 8 development to Include slnQte and multl-fomtly ~ resldentlol use·s, comnerclol uses, lnstltutlonol E A R H Project Number 199700476 Sheet 11 of 12 ~ uses, and recreotlonol uses, as wel I as lnteQroted A t-qco/NTE._ ___________ _. .:.. nature pr.eserves and storm water detention foci I lttes.1-------------- ~ SUBMI TTEO BYs SI TE1 735-ACRE CROWLEY TRACT : MR. TIM CROWLEY . LOCAT I ON1 COLLEGE STAT I ON ~ CROWLEY DEVELOPMENT CORPORATION COUNTY1 BRAZOS COUNTY, TEXAS ~ CHEVRON TOWER AUCUST, 1999 ~ 1301 MCKINNEY, SUITE 3500 LJl PROJECT NO. '4591-9811 TYPICAL CROSS SECT I ON z ~ 0 ti > 0 z 28-I 38. 06 Ac. • Conservation Reserve Open Space Ap_p.rox. 33. 0 Ac. Deed Restricted Natural Area ., LEGEND WATERS OF THE UNITED STATES WETLANDS rNA TERS OF THE UNITED STA TES) CONSERVATION RESERVE DEED RESTRICTED NATURAL AREA LOCATION PROJECT BOUNDARY LINE 0 1400' SCALE IN FEET BASE MAP SOURCE• WETLAND DELINEATION EXHIBIT, "PRELIMINARY DETERMINATION OF THE WATERS OF THE UNITED STATES AND WETLANDS OF THE APPROXIMATELY 735-ACRE CROWLEY TRACT," AUGUST 1997. VERIFIED BY THE USAGE ON FEBRUARY 18, 1998, PROJECT NUMBER 199700476. PURPOSE1 8 The pur.pose of th Is pro J ect Is to create a m I xed use E A R T · ll Project Number 199700476 ~ development to Include sln<;1le and rrultl-foml ly "' res I dent Io I uses, cornnerc Io I uses, Inst I tut I ono I ~ uses, and recreational uses, os wel I as lnteoroted A"L'1Jt:E7/NTE ................................. ~ Sheet 12 of 12 ~ nature preserves and storm water detention focllltles.1--~~~~~~~~~~~~~~~~~~~~~~~~~~ N .. = ..: "' 0 ., 0 II:: IL SUBM I TTEO 8Y1 MR. TIM CROWLEY CROWLEY DEVELOPMENT CORPORATION CHEVRON TOWER 1301 MCKINNEY, SUITE 3500 AUGUST, 1999 LJA PROJECT NO. ~591·9911 SITE1 735-ACRE CROWLEY TRACT LOCATION1 COLLEGE STATION COUNTY1 BRAZOS COUNTY, TEXAS PROPOSED MITIGATION • Attachment 1 -Dredge and Fill Certification USAGE Permit No. 199700476 July 27, 2000 Page 1 of 3 WORK DESCRIPTION: As described in the public notice dated April 20, 2000. SPECIAL CONDITIONS: None. GENERAL: This certification, issued pursuant to the requirements of Title 30, Texas Administrative Code, Chapter 279, is restricted to the work described in the application or joint public notice apd shall expire five years from the date of issuance of the Corps of Engineers (COE) permit. This certification may be extended to any minor revision of the COE permit when such change(s) would not result in an impact on water quality. The TNRCC reserves the right to require full joint public notice on a request for minor revision . The applicant is hereby placed on notice that any activity conducted pursuant to the COE permit which results in a violation of the state's surface water quality standards may result in an enforcement proceeding being initiated by the TNRCC or a successor agency. STANDARD PROVISIONS: These following provisions attach to any permit issued by the Corps of Engineers and shall be followed by the permittee or any employee, agent, contractor, or subcontractor of the permittee during any phase of work authorized by a Corps permit. 1. The water quality of wetlands shall be maintained in accordance with all applicable provisions of the Texas Surface Water Quality Standards including the General, Narrative, and Numerical Criteria. 2. The applicant shall not engage in any activity which will cause surface waters to be toxic to man, aquatic life, or terrestrial life. 3. Permittee shall employ measures to control spills of fuels, lubricants, or any other materials to prevent them from entering a watercourse. All spills shall be promptly reported to the TNRCC , Emergency Spill Response, at (512) 463-7727. 4. Sanitary wastes shall be retained for disposal in some legal manner. Marinas and similar operations which harbor boats equipped with marine sanitation devices shall provide state/federal permitted treatment facilities or pump out facilities for ultimate transfer to a permitted treatment facility . Additionally, marinas shall display signs in appropriate locations advising boat owners that the discharge of sewage from a marine sanitation device to waters in the state is a violation of state and federal law. 5. Materials resulting from the destruction of existing structures shall be removed from the water or areas adjacent to the water and disposed of in some legal manner. 6. A discharge shall not cause substantial and persistent changes from ambient conditions of turbidity or color. The use of silt screens or other appropriate methods is encouraged to confine suspended particulates . 7. The placement of any material in a watercourse or wetlands shall be avoided and placed there only with the approval of the Corps when no other reasonable alternative is available. If work within a Attachment 1 -Dredge and Fill Certification USAGE Permit No. 199700476 July 27, 2000 Page 2 of 3 wetland is unavoidable, gouging or rutting of the substrate is prohibited . Heavy equipment shall be placed on mats to protect the substrate from gouging and rutting if necessary. 8. Dredged Material Placement: Dredged sediments shall be placed in such a manner as to prevent any sediment runoff onfo any adjacent property not owned by the applicant. Liquid runoff from the disposal area shall be retained on-site or shall be filtered and returned to the watercourse from which the dredged materials were removed. Except for material placement authorized by this permit, sediments from the project shall be placed in such a manner as to prevent any sediment runoff into waters in the state, including wetlands. / 9. If contaminated spoil that was not anticipated or provided for in the permit application is encountered during dredging, dredging operations shail be immediately terminated and the TNRCC, Emergency Spill Response, shall be contacted at (512) 463-7727. Dredging activities shall not be resumed until authorized by the Commission . 10. Contaminated water, soil, or any other material shall not be allowed to enter a watercourse . Noncontaminated stormwater from impervious surfaces shall be controlled to prevent the washing of debris into the waterway. 11. Stormwater runoff from construction activities (US EPA Category X) is governed by the requirements of the US Environmental Protection Agency. Applications to apply for a general permit are to be obtained from Region 6, US EPA at (214) 665-7185. 12 . Upon completion of earthwork operations, all temporary fills shall be removed from the watercourse/wetland, and areas disturbed during construction shall be seeded, riprapped, or given some other type of protection to minimize subsequent soil erosion. Any fill material shall be clean and of such composition that it will not adversely affect the biological, chemical, or physical properties of the receiving waters . 13 . Disturbance to vegetation will be limited to only what is absolutely necessary. After construction, all disturbed areas will be revegetated to approximate the pre-disturbance native plant assemblage. 14. Where the control of weeds, insects, and other undesirable species is deemed necessary by the permittee, control methods which are nontoxic to aquatic life or human health shall be employed when the activity is located in or in close proximity to water, including wetlands. 15. Concentrations of taste and odor producing substances shall not interfere with the production of potable water by reasonable water treatment methods, impart unpalatable _flavor to food fish including shellfish, result in offensive odors arising from the water, or otherwise interfere with reasonable use of the water in the state. 16. Surface water shall be essentially free of floating debris and suspended solids that are conducive to producing adverse responses in aquatic organisms, putrescible sludge deposits, or sediment layers which adversely affect benthic biota or any lawful uses . Attachment 1 -Dredge and Fill Certification USAGE Permit No. 199700476 July 27, 2000 Page 3 of 3 17 . Surface waters shall be essentially free of settleable solids conducive to changes in flow characteristics of stream channels or the untimely filling of reservoirs, lakes, and bays . 18. The work of the applicant shall be conducted such that surface waters are maintained in an aesthetically attractive condition and foaming or frothing of a persistent nature is avoided . Surface waters shall be maintained so that oil, grease, or related residue will not produce a visible film of oil or globules of grease on the surface or coat the banks or bottoms of the watercourse . 19 . This certification shall not be deemed as fulfilling the applicant's/permittee's responsibility to obtain additional authorization/approval . from other local, state, or federal regulatory agencies having special/specific authority to preserve ·and/or protect resources with in the area where the work will occur. MITIGATION PLAN For The Crowley Property in College Station, Brazos County, Texas Project Number 199700476 December 7, 2000 Introduction The purpose of this plan is to outline the mitigation plan for impacts to Waters of the United States, including wetlands, and endangered species impacts on the Crowley tract. Mr. Tim Crowley plans to construct a mixed-use development on this approximately 735- acre parcel of land. Mr. Tim Crowley plans to mitigate for impacts to Waters of the U.S., including wetlands, and the Federally listed endangered plant species Navasota ladies' tresses (Spiranthes parksii) (NLT) on-site through the creation of a deed restricted natural area and a Conservation Reserve. Waters of the U.S., Including Wetlands A total of 5.89 acres of impacts to Waters of the U.S., including wetlands, is proposed for the Crowley tract in College Station, Brazos County, Texas by the construction of a mixed-use development. To mitigate for these impacts, an approximately 33-acre area that includes a portion of Spring Creek, Tributary 3, a portion of Tributary 4, Wetland Areas H, I and J, and the surrounding riruuian corridor will be preserved by me.Jlns o{.. deed restricting this area._Not only would this area be reserved ·n_p~rpJlli!i,cy._but secondary imeacts_resulting from evelopment of the Crowley tract to Tributary 3, a portion off'ributary 4, a portion of Spring Creek, and Wetland Areas H, I, and J would be minimized or totally eli.mi!llltsQ .. This deed restricted area, as illustrated in Exhibit 14, may at some point be deeded, or donated, to the City of College Station or another entity if Mr. Crowley so chooses. Endangered Species and Habitat A Biological Opinion was issued for the Crowley tract by the U.S. Fish and Wildlife Service for the impacts to the Federally listed endangered species Navasota ladies' tresses. The construction activities associated with this development project will impact 14 individuals of NLT. As recommended by the USFWS, a total of 38.06 acres of riparian habitat will be preserved through the creation of a Conservation Reserve on the Crowley tract. The Conservation Reserve, as illustrated in Exhibit 14, consists of a heavily wooded riparian corridor surrounding Tributary 2 and a portion of Spring Creek located to the north of proposed State Highway 40 which traverses roughly through the center of the Crowley tract. This Conservation Reserve is the result of a cooperative effort between Mr. Crowley and the Texas Department of Transportation (as well as the USFWS) in conjunction with the development of the currently proposed State Highway 40 through the Crowley tract. This Conservation Reserve will be preserved and enhanced by TxDOT as stated in their Com ensation a Plan for the purpose of safeguarding the actual plants an t e a itat of the NLT previously identified in the proposed State Highway 40 right- of-way as well as on other areas of the Crowley tract. According to the USFWS, this Conservation Reserve will provide suitable mitigation for impacts to NLT plants resulting from the State Highway 40 project as well as the Crowley development. The majority of the NLT plants identified on the Crowley tract, as well as the most suitable habitat for the plant, are located within the area now designated as the Conservation Reserve. Aside from preserving the tributary, stream, and wetland features on the approximately 33-acre deed restricted area , this riparian corridor would remain intact and would actually link to the riparian corridor established by the Conservation Reserve on this property. The net effect would create a contiguous riparian corridor area of approximately 71.06 acres in size (approximately 33-acre deed restricted natural area plus 38.06-acre Conservation Reserve) on the Crowley property. Signed: _________ _ Date: _____ _ Heather Niles Environmental Planner-HNTB Corporation For Mr. Tim Crowley Crowley Development Corporation -~-·_A_E ___ n_g_ln_e __ e_ri_n_g ___ &.._s_u_rv __ e_y_ln_g_,_1_n_c_.~ __ _.,..._ ________________________ ~~-""" , 2929 Sriarpal'<( Drive ,; Phone 713 .953.5200 Suite 600 ·' Fax 713 .953.5026 Houston , fexas 77042·3703 www.ljaengineering .com February 20, 2002 Mr. Ted Mayo, P .E . Assistant City Engineer City of College Station Development Services 1101 Texas Avenue College Station. Texas 77842 Re Castlegate Regional Detention Pond LJA Job No. 1649-0001 (11.0) Dear Mr. Mayo: REVIEWED FOR COMPLIANCE FEB 2 1 2002 COLLEGE ST A TION ENGINEERING Based on review o.fthe as-built topographic information supplied by the contractor, Cedar Ridge Ranch, the referenced project appears to be constructed in general accordance with the plan 's grades and elevations and should hydraulically function as designed. We are basing our acceptance of the project on the as-built information provided and a final walk through of the project. We did not provided continual inspection services during construction of this project. We have attached the one-year maintenance bond as supplied by Cedar Ridge Ranch for your use. It will be the responsibility of the Developer to notify the City thirty (3 0) days prior to the end of the one-year maintenance period, so an inspection can be made. This letter serves as notice of completion for the referenced project. Please contact me at (713) 953·5232 if you have any questions or comments. Wallace E. Trochesset, P .E . Senior Project Manager Attachment c : Wallace Phillips, Greens Prairie, LLC Chad Eckelberg, Cedar Ridge Ranch O :\LAND1J 649\l 649000 l\notlceofcom.doc Z:l3 3Slt'd Sl:Jt'c:UN08 t' fl - -----___________________ .... LJ __ A __ E_n_g_i_n_e_e_n_·n_g __ &_s __ u_rv_e_y_i_n_g_,_l _n _c _. ______________________________ l_~ 2929 Briarpark Drive Phone 713 .953 .5200 Suite 600 Fax 713 .953 .5026 Houston , Texas 77042-3703 www.ljaengineering .com February 20 , 2002 Mr. Ted Mayo , P.E. Assi stant City Engineer City of College Station Development Services 1101 Texas Avenue College Station, Texas 77 842 Re Castlegate Regional Detention Pond LJA Job No. 1649-0001 (11.0) Dear Mr. Mayo: Based on re v iew of the as-built topographic information supplied by the contractor, Cedar Ridge Ranch, the referenced project appears to be constructed in general accordance with the plan 's grades and elevations and should hydraulicall y function as des igned. We are basing our acceptance of the project on the as-built information pro vided and a final walk through of the project. We did not provided continual inspection services during construction of this project. We have attached the one-year maintenance bond as supplied by Cedar Ridge Ranch for your use . It will be the responsibility of the Developer to notify the City thirty (30) days prior to the end of the one-year maintenance period , so an in spection can be made. This letter serves as notice of completion for the referenced proj ect. Please contact me at (713 ) 953-5232 if you have an y questions or comments . Wallace E. Trochesset, P .E. Senior Project Manager Attachment c: Wallace Phillip s, Greens Prairie , LL C Chad Eckelber g, Cedar Ridge Ranch O:\L AN D\1649\1649000 l \noticeofcom .doc ~~ ... ~ ... ~.,.~.::1-.,. ~ .. ·······":'!~ .. -.. .. .., "'•··· ··.·• ~ I•! ~.l ~ ................................ ~ l WAU.ACE E. TROCHESSET ~ ~ ..........•...................... , Wi • • It' '•1i·. 83421 ••• ;t;l:; • o·· <. ~ -~-,,~~ .. !ceNS~·;:~..:" \\uS10··· .... ·\:.~vJ" \, .. NA\.. ,,..--0.., ·~.'''"~' ""' z ... ~ MAINTENANCE BOND STATE OF Texas BOND NO . AI 6160369 ----------- COUNTY OF Montgomery --~-~----~ KNOW ALL MEN BY THESE PRESENTS: THAT WE, Cedar Ridge Ranch as Principal, hereinafter called "Contractor," and the other subscriber hereto as I Surety, do hereby acknowledge ourselves to be held and firmly bound to __ _ _ G_r_e_e_n_s_P_r_a_i_r_ie~'~L_L_C ______ ~ in the sum of Five Hundred Ninety Two Thousand, Two Hundred Sixty Five and 10/100----------Dollars ($592,2 65.10) for the payment of which sum well and truly to be made to the said Obligee and its successors , the said Contractor and Surety do bind themselves, their successors and assigns jointly and severally . The conditions of this obligation are such that: WHEREAS, the said Contractor has entered into a contract with Greens Prairie, LLC for: Construction of the Detention Pond and Channelization to serve Castle Ga te Communities, College Station, Brazos County, Tex as Job No. 1649-0001 all such work to be done as set out in full in said contract and the plans and specifications therein referred to, NOW, THEREFORE, if the said Contractor shall repair, replace and restore any and all defects in, or damages , to said work occasioned by, and resulting within One ( 1 ) year from and after the day of the acceptance of said work from defects in materials furnished by , or workmanship of the Contractor, in performing the work covered by said contract, then this obligation shall become null and void ; otherwise to remain in full force and effect. I 20...Ql Attached to & made a part of bond # AI 6160369 GULF INSURANCE COMPANY HARTFORD , CONNECTICUT ~8~~ER Al 9 3 4 513 3 POWER OF ATTORNEY ORIGINALS OF THIS POWER OF ATTORNEY ARE PRINTE D ON BLUE SAFETY PAPER WITH TEAL I NK. DUPLICATES S HALL HAVE THE SAME FORCE AND EFFECT AS A ORIG I AL ONLY WHEN ISSUED IN CONJU CTION WITH THE ORIGINAL. KNOW ALL MEN BY THESE PRESENTS: That the Gulflnsurance Company, a corporation duly organized under the laws of the State of Connecticut, having its principal office in the city of lrvin g, Texas , purs uant to the following reso lu tion, adopted by the Finance & Executive Committee of the Board of Directors of the said Company on the 10th day of Aug ust, 1993 , to wit: "RESOLVED, th at the President, Executive Vic e President or any Senior Vice President of the Company shall have authority to make, execute and deliver a Power of Attorney cons tituting as Attorney-in-Fac t, such perso ns, firms, or corporations as may be selected from time to time ; and any such Attorney-in -Fact may be removed and the authority granted him revoked by the President, or any Executive Vice President, o r any Senior Vice Pres ident, or by the Board of Directors or by the Finance and Executive Committee of the Board of Directors. RESOLVED, th at nothillg in this Power of Attorney shal l be construed as a grant of authority to the attorney (s)-in-fact to sign, execute, ackllow ledge, deliver or oth- erwi se issue a policy or policies of in surance on behalf of Gulf Insurance Company. RESOLVED , th at the signatur e of the President, Executive Vice Presid ent o r any Senior Vice President, and the Seal of the Company may be affixed to any suc h Power of Attorney or any certificate relating thereto by facsimi le, and any suc h powers so exec uted and certified by facsimile s ignature and facsimile seal shall be valid and binding up on the Company in the futu re with respect to any bo nd and documents relating to such bonds to which they are attached." Gulf In surance Company does hereby make , constitute and appoin t r NAME , ADDRESS PRINCIPAL: C ITY, STATE , ZIP Cedar Ridge Ranch 315 Coshatte Rd. Bellville, TX 77418-9353 '- r EFFECTIVE DATE December 13, 2001 '- I' CONTRACT AMOUNT \. $ 592,265.10 r BO ND AMOUNT 1$ 592,265.10 \. ----Gary Alexander, Richard H. Baker, Scott D. Chapman, Elaine Lewis, Roy E. Simmons its true and lawful attorney(s)-in-fact, with full power and authority hereby conferred in it s nam e, place and stead, to sign, execute, acknowledge and deliver in its behalf, as s urety, any and all bonds and undertakings of suretyshi p, and to bind Gulf Insurance Company thereby as full y and to the same extent as if any bonds , under- takings and documents relating to s uc h bonds and/o r undertakings were sig ned by the duly authorized officer of the Gulf In surance Com pany and a ll the acts of said attorney(s)-in -fac t, pursuant to th e authority herein given, are hereby ratified and confirmed . The obligation of th e Company shall not exceed three million (3,000,000) dollars . IN WITNESS WHEREOF, the Gulf Insurance Company h as caused these presents to b e signed by any officer of the Company and its Corporate Seal to be h ereto a ffi xe d. STATE OF NEW YORK COUNTY OF NEW YORK SS GULF INSURANCE COMPANY Lawrence P. M initer Executive Vice President On the 1st day of October, 2001 A.D., before me came Lawrence P. Miniter, known to me personally who being by m e duly sworn, did depose and say; that he resi des in the County of Bergen, State of New Jersey; that be is the Executive Vice President of the Gulf Insurance Company, the corporation described in and which exec uted the above instrument; tha t be knows the seal of said corporation; that the seal affixe d to the said ins truments is s uch cor- porate seal; that it was so a ffi xe d b y order of the Board of Director s of said corporation and that h e s igned his name, thereto b y like order. STATE OF NEW YORK SS CO TY OF NEW YORK AI9345133 *1352784* 8016-AI (10/2001) c/J;. ,~f!., ANGdli:HAB~;-BEGAZO 67~ No tary Public, State of New York No . 01MA6019988 Qualified in Kings County Commission Ex pires Fe bruary 16, 2003 Dated the 13th day of December ./~(-~ Senior Vice President '20 01 'I 'I .J 'I .J \ ) £)~,~~) l~-p;'"-cJ J < i;..,t .,£ : " \A/Je-y;ucA,~/ ~Ll £,,,#,._,_ "''-V d ~M*-/>1.. Lt:- ~ A,b: '7 J~ -a..::-'"" -G z.~ / ,, -?Va/),. d~4L r;;; .. ~~ ·~ kv'e~ .l... .z;:,4-. r-:--A,,...., .' <17CJ-6t:iC)-/4to La¢! / -, ~~L _. IA .J4 / J~~ /;;; c _L ~J b/_ktCY7~ -~&Ao,._; ;::, c.-. z9za, ~J>?4""~J:.. ~~->u,L. )e/O / ~~L ~ 77042.-3 7~ .> ~ I P1/~/ja-/%~~ ~---~">w .z;,ML ~-- 'fZ"t:>/O At/('V~,{_ !?~ L ~/£_ ~ /<L,L. r. 77~ , (/ I J~n/7/ " /{ 17 _, v -~ -'- ~ FACSIMILE COVER SHEET CI'IY OF COLLEGE STATION DEVELOPMENT SERVICES 1101 Texas Avenue South, PO Box 9960 College Station, Texas 77842 Phone (979)764-3570 I Fax (979)764-3496 · Date: l 0 .. d S ~ \ # of pages including cover:-=3 ___ _ If you did not receive a complete fax, please calf our office immediately for a new transmittal.· TO:~\\c&Q...2.\ n&ks.s,e_\ FAX: _____ _ RE: ·----------------------- FROM":\. ~\...:\ \) \ PHONE: (979) 764-3570 COMPANY: _____ ~C1~·tr~o~f~C~o_ll~eg_e_S_ta_ti_·o_n _______ _ REMARKS: D Urgent D For your review D Replay ASAP D FYI ------------------------) 10 /25 /01 10:52 '5'979 764 3496 DEVELOPMENT SVCS TRANSMISSION OK TX/RX NO. CONNECTION TEL CONNECTION ID START TIME USAGE TIME PAGES RESULT *************************** *** ACTIVITY REPORT *** *************************** 9933 17139535026pp152 10 /25 10:51 00'25 1 OK ~001 10 /25 /01 10:54 '5'979 764 3496 DEVELOPMENT SVCS TRANSMISSION OK TX /RX NO. CONNECTION TEL CONNECTION ID START THIE USAGE THIE PAGES RESULT *************************** *** ACTIVITY REPORT *** *************************** 9934 17139535026pp152 10 /25 10:53 00 '49 2 OK ~001 FACSIMILE COVER SHEET CITY OF COLLEGE STATION DEVELOPMENT SERVICES 1101 Texas Avenue South, PO Box 9960 College Station, Texas 77842 Phone (979)764-3570 I Fax (979)764-3496 · Date: \ CJ -~S -{)\ #of pages including cover:~ If you dkl not receive a complete f~ please call our office immediately for a new transmittal. TO~o.}_\g0_,e.. \?6 \ \\ ~S, FAX: ____ _ COMPANY:~~~~~~~~~~~~~~~~~~~- RE: ------------------------ FROM~· """°'"'\....,\ D PHONE: (979)764-3570 \ REMARKS: D Urgent D For your review D Replay ASAP D FYI ) -------------------------, 10 /25 /01 11 : 02 '5'979 764 3496 DE VELOP MENT SVCS TRAN SMISSIO N OK TX /RX NO. CONN ECTIO N TEL CONN ECT IO N ID STA RT THIE USAGE TIME PAGES RES ULT *************************** *** ACTI VITY REPORT *** *************************** 9936 9p6901041 10 /25 11: 01 01 '08 3 OK ~001 The City of College Station, Texas Embracing the Past, Exploring the Future. P .O . Box 9960 • 11 01 Texas Avenue • C ollege Sta ti o n , TX 77842 • (979) 764-3500 www.ci.coll ege-s tatio n.tx .u s To: Wallace E. Trochesset, P.E. Senior Project Mgr. LJA Engineering & Surveying, Inc. 2929 Briarpark Drive, Suite 500 Houston, Texas 77042-3703 From: Teddy D . Mayo, P.~ Asst. City Engine~ { Date: October 25, 2001 Re: Castlegate Regional Detention Pond-Inspection for compliance versus construction documents On Monday October 22, 2001 I inspected the Castlegate Detention Pond site to verify general compliance with the construction documents approved by the City on December 06, 2000. The following reflect my findings which are not all inclus ive but represent the bulk of the items needing attention: • Tributary C: Landlock Turf Reinforcement is shown to be applied from approximately station 9+75 to station 12+00 covering the bottom and 25' on each slope. There is only about 100' installed and it only covers the 25' wide bottom. At approximate station 4+ 7 5 a gully has eroded completely thru the east slope washing around the small amount of rock riprap placed there. This gully needs to be reconstructed into a ditch with adequate cross-section, slopes, and riprap. The concrete drop structure at the north property line is not all constructed . Starting on the north there is O' of riprap vs. 20' shown; 10' concrete secti on vs., 50' shown; 12' concrete as shown; 50' concrete as shown; and 6' of riprap vs . 20 ' shown. • Spring Creek Tributary: South side-culverts from upper slope interceptor need to have the ends tapered to conform to the slopes- see sheet 8 detail; approximate station 10+00 on south side-hole washed thru north embankment of slope interceptor ditch-need to Home o f Te xas A&M Univers ity repair properly; existing sanitary sewer manhole on south side at southwest comer-covered up, needs to be raised. • Pond: no jogging trail ramps have been installed. • General: South side where fill area interfaces with undisturbed area-need to improve grading/drainage to insure positive drainage with adequate capacity drainage ways and riprap where the drainage way discharges down rather steep slopes; construction note 2 on page 2 requires a minimum of 6" of upper surface material which was to be stockpiled to be spread over final graded surfaces prior to hydromulch & seeding-it doesn't appear that this was done; by and large the final graded surfaces appear to be compacted quite tightly offering a poor seedbed; I have a great concern about an established vegetative cover on all of the disturbed surfaces that will prevent mass erosion; I will expect at least a 12 months warranty period with appropriate repairs to insure establishment of an acceptable vegetative cover; before final pullout the contractor needs to police the perimeter and pickup all debris such as empty soft drink containers, paper, oil can, etc. Hopefully this will be of value as you prepare your as built assessment for this project. CC: Wallace Phillips, Greens Prairie Investors, Ltd. Project file Natalie Ruiz, Development Manager To: Wallace E. Trochesset, P.E. Senior Project Mgr. LJA Engineering & Surveying, Inc. 2929 Briarpark Drive, Suite 500 Houston, Texas 77042-3703 From: Teddy D. Mayo, P.E. Asst. City Engineer Date: October 25, 2001 Re: Castlegate Regional Detention Pond-Inspection for compliance versus construction documents On Monday October 22, 2001 I inspected the Castle gate Detention Pond site to verify general compliance with the construction documents approved by the City on December 06, 2000. The following reflect my findings which are not all inclusive but represent the bulk of the items needing attention: • Tributary C: Landlock Turf Reinforcement is shown to be applied from approximately station 9+75 to station 12+00 covering the bottom and 25' on each slope. There is only about 100' installed and it only covers the 25' wide bottom. At approximate station 4+75 a gully has eroded completely thru the east slope washing around the small amount of rock riprap placed there. This gully needs to be reconstructed into a ditch with adequate cross-section, slopes, and riprap. The concrete drop structure at the north property line is not all constructed. Starting on the north there is O' of riprap vs. 20' shown; 10' concrete section vs., 50' shown; 12' concrete as shown; 50' concrete as shown; and 6' of riprap vs. 20' shown. • Spring Creek Tributary: South side-culverts from upper slope interceptor need to have the ends tapered to conform to the slopes- see sheet 8 detail; approximate station 10+00 on south side-hole washed thru north embankment of slope interceptor ditch-need to repair properly; existing sanitary sewer manhole on south side at southwest comer-covered up, needs to be raised. • Pond: no jogging trail ramps have been installed. • General: South side where fill area interfaces with undisturbed area-need to improve grading/drainage to insure positive drainage with adequate capacity drainage ways and riprap where the drainage way discharges down rather steep slopes; construction note 2 on page 2 requires a minimum of 6" of upper surface material which was to be stockpiled to be spread over final graded surfaces prior to hydromulch & seeding-it doesn't appear that this was done; by and large the final graded surfaces appear to be compacted quite tightly offering a poor seedbed; I have a great concern about an established vegetative cover on all of the disturbed surfaces that will prevent mass erosion; I will expect at least a 12 months warranty period with appropriate repairs to insure establishment of an acceptable vegetative cover; before final pullout the contractor needs to police the perimeter and pickup all debris such as empty soft drink containers, paper, oil can, etc. Hopefully this will be of value as you prepare your as built assessment for this project. CC: Wallace Phillips, Greens Prairie Investors, Ltd. Project file Natalie Ruiz, Development Manager • I /:&G/t:Jlf/4 ~ CE-W ??'G? A/ tL::> )/I~ C/,IA-b/%'~ /?J ~ .&wt. 7 ,r//V',,1-{.. ..,.T~ 'j;'P.U • -. • /tfJ-CTZ-"7;? ~~<===> ---H....--- y-'"7"'.:Y'-" -k7"·x-... '7Y',..,. r/'~ /->?.A? -- --o~~sw/ r ///rp;r~cv 7/'rY? -.....---- ~tv:::::/;,~ --z ~ ~ /-(F>--W ~L --7 rvz ~<Z~ -.,JZ:,~"-'"::? r-7?:r>?~ b $-/$'4:/ cy ~7n~~ .r ..,. ~ ,. M ~~ (/.'rY.? / -~ ~ ---.--- -----:_7 f P/V -tr~ /7~ /?/t-AD /DY 7/-----/~_.p .,..r:tY79'77//l?{J//5/f .f..~--- --- - --~(Y 11y~ 1 7 e/ /r-t? -- -*"" d~;/?2 -2 ....._.. .t:?>~~c:/YJ~g.. 111~~ - ( !'~/ "7 ~ ~~ ~~ ( 5/'77 (77 y-w l?t? ~ 'I -- -........--- - -~ -e>?tU/ _7 / dWh aw -~ ~"'"':;f ~"i:J f-Eo ~'=J ~ 77"'° r};r:/ ~ ~ j/:S ---;y -f -Z..at:PC#'-/0 d<7 f >7/Y 7'27' ----r70 o--·,g-;y Jl.;~ur I ll-ilS FORM REPLACES PREVIOUS FORM 3510-6 (8-98) See Reverse for Instructions Form Approved. OMB No. 2040-0188 : NP DES FORM OEPA United States Environmental Protection Agency Washington, DC 20460 Notice of Intent (NOi) for Storm Water Discharges Associated wl1h CONSTRUCTION ACTIVITY Under a NPOES General Perml1 Submission of this Notice of Intent constitutes notice that the party identified in Section I of this form intends to be authorized by a NPDES permit issued for storm water discharges associated with construction activity in the State/Indian Country Land identified in Section II of this form . Submission of this Notice of Intent also constitutes notice that the party identified in Section I of this form meets the eligibility requirements in Part 1.8. of the general permit (includ ing those related to protection of endangered species determined through the procedures in Addendum A of the general permit), understands that continued authorization to discharge is contingent on maintaining permit eligibility, and that implementation of the Storm Water Pollution Prevention Plan required under Part IV of the general permit will begin at the time the permittee commences work on the construction project identified in Secion II below. IN ORDER TO OBTAIN AUTHORIZATION, ALL INFORMATION REQUESTED MUST BE INCLUDED ON THIS FORM . SEE INSTRUCTIONS ON BACK OF FOAM . I. Owner/Operator (Applicant) Information Name : Address : ii i11 0111 1C,1e.1 f\ifiiA-1'1\i 1t<101A1P1 City: 1C101L-tt..1 ti1 u1£1 151T1A1T1!.11> 1~ 1 1 I I I State :~ Phon e : I I I Status of Owner/Operator: Has the Storm Water Pollut ion Prevention Plan (SWPPP) been prepared? Yes g----No 0 Optional : Address of location of SWPPP for viewing SWPPP ~ress in Section I above 0 Address in Section II above D Other address (if known) below: Phone : Address : '~~~~~~~~~~~~~~~~~~~~~~~~~~I ~l~l~l~I~~~~ I I I C ity: I I I I I I I I I I I I Name of Receiving Water: 1 / 10 I 01 I I 2.i 0 I 0 I 0 I 10 1'11J10IZ101"1 /I Month Day Year Month Day Yea r Estimated Construction Start Date Estimated Completion Date Estimate of area to be disturbed (to nearest acre): I I I I 12 1Si Estimate of Likelihood or Discharge (choose only one): 1. 0 Un likely 3 . !B1)nce per we ek 5. 0 Continua l 2. 0 Once per month 4 . 0 Once per day Ill. Certification State: LLJ Zip Code : 1-1 I I I I I Based on instruction provided in Addendum A of the permit, are there any listed endangered or threatened species, or designated critical habitat in the project area? Yes tJ No~ I have satisf ied permit eligibility with rega rd to protection of endangered species through the indicated sect ion of Part 1.8 .3.e.(2) of the permit (check one or more boxes): (a) rg/(b) O <clO (d )o I certify under penalty of law that this document and all attachments were prepared under my direc tion or supervision in accordance w ith a system designed lo assure that qua li fied personnel properly ga ther and evalua te the information submitted. Based on my inquiry of the p erso n or persons w ho manage th is system . or those persons directly responsible for gathering the information. the information subm itted is , to the best of my knowledge and bel ief, true , accurate, and complete . I am aware that ther e are si gn ific ant penalt ies for submitt ing fa lse information, inc luding th e poss ib il ity of line and imprisonment for knowing v io lat ion s. Signature : E PA Form 3510-9 rep laced 351 0 -6 (8 -98) ~-~ COlllGl STATION DEVELOPMENT PERMIT PERMIT NO. 100002 DP-CASTLEGA TE DETENTION POND FOR AREAS INSIDE THE SPECIAL FLOOD HAZARD AREA RE: CHAPTER 13 OF THE COLLEGE STATION CITY CODE SITE LEGAL DESCRIPTION: Timothy J. Crowley 204.8 Ac. Tk. R. Stevenson Vol. 1415; Pg. 074 DATE OF ISSUE: January 10, 2000 OWNER: CROWLEY, TIMOTHY J 1301 MCKINNEY HOUSTON, TX 77010-3034 SITE ADDRESS: 2270 GREENS PRAIRIE RD W DRAINAGE BASIN: Spring Creek VALID FOR 12 MONTHS CONTRACTOR: TYPEOFDEVELOPMENT: FULLDEVELOPMENTPERMIT SPECIAL CONDITIONS: All construction must be in compliance with the approved construction plans All trees must be barricaded, as shown on plans, prior to any construction. Any trees not barricaded will not count towards landscaping points. Barricades must be l' per caliper inch of the tree diameter. The Contractor shall take all necessary precautions to prevent silt and debris from leaving the immediate construction site in accordance with the approved erosion control plan as well as the City of College Station Drainage Policy and Design Criteria. The Owner and/or Contractor shall assure that all disturbed areas are sodden and establishment of vegetation occurs prior to removal of any silt fencing or hay bales used for temporary erosion control. The Owner and/or Contractor shall also insure that any disturbed vegetation be returned to its original condition, placement and state . The Owner and/or Contractor shall be responsible for any damage to adjacent properties, city streets or infrastructure due to heavy machinery and/or equipment as well as erosion, siltation or sedimentation resulting from the permitted work. Any trees required to be protected by ordinance or as part of the landscape plan must be completely fenced before any operations of this permit can begin. In accordance with Chapter 13 of the Code of Ordinances of the City of College Station, measures shall be taken to insure that debris from construction, erosion, and sedimentation shall not be deposited in city streets, or existing drainage facilities. I hereby grant this permit for development of an area inside the special flood hazard area. All development shall be in accordance with the plans and specifications submitted to and approved by the City Engineer in the development permit application for the above named project and all of the codes and ordinances of the City of College Station that apply. Date / w /2-' 0/ ~-~ COLLlGl STATION DEVELOPMENT PERMIT PERMITNO. 100002 DP-CASTLEGATE DETENTION POND FOR AREAS INSIDE THE SPECIAL FLOOD HAZARD AREA RE: CHAPTER 13 OF THE COLLEGE STATION CITY CODE SITE LEGAL DESCRIPTION: Timothy J. Crowley 204.8 Ac. Tk. R. Stevenson Vol. 1415; Pg. 074 DATE OF ISSUE: January 10, 2000 OWNER: CROWLEY, TIMOTHY J 1301 MCKINNEY HOUSTON, TX 77010-3034 SITE ADDRESS: 2270 GREENS PRAIRIE RD W DRAINAGE BASIN: Spring Creek VALID FOR 12 MONTHS CONTRACTOR: TYPEOFDEVELOPMENT: FULLDEVELOPMENTPERMIT SPECIAL CONDITIONS: All construction must be in compliance with the approved construction plans All trees must be barricaded, as shown on plans, prior to any construction. Any trees not barricaded will not count towards landscaping points. Barricades must be l' per caliper inch of the tree diameter. The Contractor shall take all necessary precautions to prevent silt and debris from leaving the immediate construction site in accordance with the approved erosion control plan as well as the City of College Station Drainage Policy and Design Criteria. The Owner and/or Contractor shall assure that all disturbed areas are sodden and establishment of vegetation occurs prior to removal of any silt fencing or hay bales used for temporary erosion control. The Owner and/or Contractor shall also insure that any disturbed vegetation be returned to its original condition, placement and state. The Owner and/or Contractor shall be responsible for any damage to adjacent properties, city streets or infrastructure due to heavy machinery and/or equipment as well as erosion, siltation or sedimentation resulting from the permitted work. Any trees required to be protected by ordinance or as part of the landscape plan must be completely fenced before any operations of this permit can begin. In accordance with Chapter 13 of the Code of Ordinances of the City of College Station, measures shall be taken to insure that debris from construction, erosion, and sedimentation shall not be deposited in city streets, or existing drainage facilities. I hereby grant this permit for development of an area inside the special flood hazard area. All development shall be in accordance with the plans and specifications submitted to and approved by the City Engineer in the development permit application for the above named project and all of the codes and ordinances of the City of College Station that apply. Date / w /:2--0/ ( ( \, ! I L---~~~~~~~~~~~~~~~~~~~~~~~ O M B No . Z0 40 -0 188 i / :! Ins tru ctio n s -E PA Form 3 51 0 -9 .) Noti1;le of Intent INOI) tor Storm Water Discharges Associated _w111 1 C"P,nstruction Activity to be Covered Under a NPDES Permit i i ' I I I Who Must File a Not e of r tent Form Under the provis ions ,1 the c1 an Water Act. as amenoeo . (33 U .S.C. 1251 et.sea.: the Act). exec t as p ov1oed by Part l .B.3 the permit . Federal law prohibits discharges o ollut nts 1n storm water from construction acuvities without a National Pollul.:! r: arge Elimination System Permit. Operator(s) of construction sites where 5 or more acres are disturbed . smailer sites that are part of a larger common plan of development or sale where there is a cumulative disturbance of at least 5 acres . or anv site designated by the Director. must submit an NOi to obtain coverage under an NPDES Storm Water Construction General Permit. If you have questions about whether you need a permit under the NPDES Stonm Water orograrn . or if you need information as to whether a particular program is administered by EPA or a Slate agency, write to or telephone the Notice of Intent Processing Center at (703) 931-3230 . Where to File NOi Form NOls must be sent to the following address: Storm VJater Notice of Intent (4203) US EPA 401 M . Street. SW Washington. D.C. 20460 Do not send Storm Water Pollution Prevention Plans (SWPPPs) to the 1 above address. For ovemighVexoress deliveri of NOls . please indude the room number 2104 Northeast Mall and phone number (202) 2 60-9 541 in the aodress. When to File This form must be filed at least 48 hours before construction begins. Completing the Form OBTAIN AND READ A COPY OF THE APPROPRIATE EPA STORM WATER CONSTRUCTION GENERAL PERMIT FOR YOUR AREA. To complete this form . type or print. using uppercase letters. in the appropriate areas only. Please place each character between the marks (abbreviate i f necessary to stay within the number of characters allowed for each item). Use one space for breaks between words. but not for punctuation marks unless they are needed to darify your response . If you have any questions on this form . call the Notice of Intent Processing Center at (703) 93 1-3 230 . Section I. Facility Owner/Operator (Applicant) Information Provide the legal name. mailing address. and telephone number o f the person. firm, public organization . or any other entity that meet either of the following two criteria : (1) they have operational control over construction plans and specificauons. including the ability to make modifications to those pl ans and specifications: or (2) they have the day-to-day operational control of those activities at the pro1ect necessary to ensure comp !iance with SWPPP r equirements or other permit conditions . Each person that meets e i ther of these criteria must file this form. Do not use a colloquial name. Corr'3spon- dence for the permit will be sent to this address. Enter the appro priate letter to ind icate th e legal slatus of the owner/operator of the project: F = Federa l: S = State : M = Pub l ic (other than federal o r state ); P =Private. Section II. Project/Site Information Enter the official or legal name and complete street address. in clu ding ci ty, coun ty . state. zip code . and phone number of the project or si te . If it lacks a street address . indicate with a general statement the location of the site (e .g., !ntersection of State Highways 61 and 34). Complete site information must oe orov1ded for permit coverage to be granted . The aopl1cant must also provide the latitude and longitude of the faci lity in degrees, minutes . and seconds to the nearest 15 seconds . The latitude and longitude of your facility can be located on USGS quadrangle maps . Quadrangle maps can be obtained by calling 1-800 USA MAPS . Longitude and latitude may a lso be obtained at the Census Bureau Internet site : http://www.census .gov/cgi-bin/gazetteer. ' l atitude and longitude for a facility in decimal form must be converted to degrees. minutes and seconds for proper entry on the NOi form . To convert decimal latitude or longitude to degrees. minutes . and seconds . follow the steps in the following example . ~~~~~~~~~-~~~~J ! Convert decim a l 1 .. 1111 1 . 1455 7 IO d egrees. mi nutes . a nd seco nd s. \ hfft'4i. .. 1) T he number:; i.. 11 1 111 e d e cimal point are d egrees . I 2 ) To obtain m 1111 11i 1.I" Mill ;; 1 ,1 y the ti rst four numbers to the right al the d eamal po1r11 1, 1 ,~' 11 ~11 ~J 4 x .0 06 = 7 .404 .. 3 ) T he number:; i.·1 1 1,11 ~ 11 .,1 the decimal point 1n the r esult obtained in step 2 are th1:111 1 11 11 ~11 ;. • \ 4) To obta.in seco1111 11 , 111;111 1i'tY the remaining three numbers to the rig~t of the deamal tr1111 111 ,"1p.,111t 1n step 2 by 0.06 : 404 x 0 .06 = 24 .24. Since the numbers 111 lit" nqlll uf the decimal point are not used. the resu lt is 24". 5) T he conversu111 for 45 . I 23 4 = 45 ° 7' 24". Indicate whether 111'? project is on Indian Country Lands. Indicate if the Storm Water Pollution Prevention Plan (SWPPP) has been developed . Refer to Part IV of the general permit for in formation on SWPPPs. To be eligible for coverage . a SWPPP must have been prepared . Optional: Provide the address and phone number where the SWPPP can be vi ewed if different from addresses previously given . Check appropriate box . Enter the name o f the closest water body which receives the oro ject's construction storm water discharge . Enter the estimated construction start and completion dates using ·'.)Ur di g its for the year (i.e . 0 5/27 /1998). Enter the estimated area to be disturbed i ncluding but not limited to : g rubbing, excavation . grading, and utilities and infrastructure installatio n . Indicate to the nearest acre: if less than 1 ;-ere. enter "1: ~~ote : 1 acre = 43 ,560 SQ . ft . Indicate your best estimate of the likelihood of storm water d iscnarges fr om the project. EPA recognizes that actual discharges may differ from th is estimate due to un foreseen or chance circumstances . Ind icate i f there a re a ny listed endangered o r threatened spe cies . ::i r d esignated critical habitat in the project area. Indicate which Part of the permit that the applicant is el ig ib le with re g ard to protection of endangered or threatened species . o r oes ignated cri tica l habitat. Section Ill. Certification Federal Statutes provi de for severe oena lties for submitting fa lso: iniormauon o n th is application form . Federal regu lations require this ap pticatt o n to be signed as follows : For a corporation : 'J y a responsible corporate officer. w hi c h mea n :;: (i) president. secretary, treasurer. or vice ores1oent of the corporation in charg e of a principal business function , or any other person who performs similar policy or decision making functions. or (ii ) the manager o f o ne er more manufacturing , production. or operating faalities emplo ying more than 250 persons or having gross annual sales or expenditure s 8x ceeding s ;i5 million (i n second-quarter 1980 dollars). if authonr1 io sign documents ha s been assigned or delegated to the manager 1n accordance w ith corpora te procedures: For a partnership or sole proprietorship: by a general partner oi the propnetor. o r For a municipality, state . federal. o r other public facility: by ei r.her a princt031 executive or ranking elected official. An unsigned or undated NOi form will not be granted permit coverage . Paperwork Reduction Act Notice Public reporting burden for this application is estimated to avera g e 3. 7 hours . T his estimate includes time for reviewing instructions . searching existing data sources . gathering and maintaining the data needed . a nd completing and reviewing the collection of information . An agency may no t conduct or sponsor. and a person is not required to respond to . a collecuon of information unless it displays a currently valid OMB control number. Send comments r egarding the burden estimate . any other aspect of th e collection of information . or suggestions for improving this form. incl udi ng any suggestions which may increase or reduce this burden to : Direc to r. OPPE Regulatory Information Division (2137). U .S . Environmental Protectio n Agency, 401 M Stre e t . SW, Washington . D .C . 20460 . Include the O MB control number on any correspondence. Do not send the completed form to this addre ss. THIS FOR M REPLACE S PRE VIOUS FOR M 3 510-6 (8-9 8) Form Approved. O MB No _ 2040-018 £ See Reverse fo r Instruction s &EPA U nited States Environmental P rotection Agency 1'4POES Washington . DC 20460 FORM Notlce ot Intent (NOi) for Storm Water Discharges Associated with ( CONSTRUCTION ACTIVITY Under a NPOES General Permit Submission of this Notice of Intent constitutes notice that the party identified in Section I of this form intends to be authorized by a NPOES permit issueo for storm water discharges associated with construction activity in the State/Indian Country land identified in Section fl of this form . Submission of this Notice of Intent also constitutes notice that the party identified in Section I of this form meets the eligibility requirements in Part 1.8. of the general permit (indUding those related to protection of endangered species determined through the procedures in Addendum A of the general permit), understands that continueo authorization to discharge is contingent on maintaining permit eligibility, and that implementation of the Storm Water Pollution Prevention Plan required undei Part IV of the general permit will begin at the time the permittee commences work on the construction project identified in Secion II below. IN ORDER TO OBTAIN AUTHORIZATION . ALL INFORMATION REQUESTED MUST BE INCLUDED ON THIS FORM. SEE INSTRUCTIONS ON BACK OF FORM . I. Owner/Operator (Applicant) Information Name: IL1e 1cl1g,1 ( 1 I ~ ;I .,(l ~lc l I I I I I I I I I I I I I I I I I I Phone: 1 "171~1 S,1111~13 1 71] Address: 131 2.1 J I 1C.1 01 S1 h1 ~ +;f 1e..1 Status of EJ I I I I I I I I I I I I I I I I I I I I Owner/Operator: City: 1 6~1l 1I 1v1i 1l1 l1e 1 I I I I I I I I I I I I I State: 1T1/(! Zip Code: 1717141/ 1£1-1 I I I II . Project/Site Information Is the facility located on Indian Country Lands? Project Name: !Q1 e jf 1C ~ (f-1; I 0 I"' I 1 P1 01~1J 1 -1 C 1 a 1 s1f 1 / 1e1~1a1f1e 1 1 5 1 LA1b~! Yes O No~ Project Address/Location : I N1 aj I 9ifl 1.I1 "'I +1 • I 1.S1H1 ~ 14 1 I (,11' I e I '° I " Is I 1P 1r l q!; I r1 ·I ~! I Q.o,J City: 1GQ1l 1l 1 ~1 ~ I~ I I 5 14-1 0.1 -r1 ; I D I rt I I I I I I I I I State: I ij "-! Zip Coda: IJ 0 11b 14 1 5"1-1 I I I 0 ( ,c I I 1( County: l 6:1f 1 ~ 1'-10 1.5'1 Latitude: I] 10 j 3 I 3 I 3 ~ I LongitUde : I I q,6 I I I) I 0 1° I I I I I I I I I I I I I Has the Storm Water Po ll ution Prevention Plan (SWPPP) been prepared? Yes0 NoO Optional: Add ress of location ol ~ress in Section I above 0 Address in Section II above 0 Other address (it known) below: ( SWPPP for viewing - SWPPP Phone: Address: I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I i I I I I I I I City: I I I I I I I I I I I I I I I I I I I I I I I State: LL.J zjp Code: I I I I I 1-1 I I I Name of Receiving Water: 1Sip1r 1;l l'\i'I il1 r I e I t: I /\1 I I I I ! I I I I I I I I 0 I ( I~ c) 1Z.1° I 0 I I I 10161°11 1z 1° 1° 1 I I Based on instruction provided in Addendum A of the permit. are Mondi Day 'rllar Monrfl Day Year there any listed endangered or threatened species, or designat&e Estimated Construction Start Date Estimated Completion Date critical habitat in the project area? Estimate ot area to be disturbed (to nearest acre): I I I I 1Z..1B! Yes 0 No~ Estimate of Likelihood of Discharge (choose only one): I have satisfied permit eligibility with regard to protec:ion of 1.0 3. ~perweek endangered species through the in<ficated section of Part 1.8 .3.e.(2 . Unlikely 5. 0 Continual ot the permit (check one or more box.es): 2.0 Once per month 4 . 0 Once par day (a)~ (bJO iciO (d)O Ill. Certification I certify under penalty ot law that this document and all attachments were prepared under my direction or supervision in accordance with a syste r; designed to assure that qualified personnel properly gather and evaluate the information submitted. Based on my inquiry of the person or persons wh c manage this system . or those persons directly responsible lor gathering the information , the inlormation submitted is , to the best of my knowledge ana belief. true. accurate, and complete. I am aware that there are significant penalties lor submitting false information, including the possibility of tine ano imprisonment for knowing violations. 1 ; 1 ·· I :~I °".1 ·\ / ~ I " 1.1 1 ; 1<l /'1 Print Name: JI .., I ,. I 'I 1 ·r 11· I I ~ 11.-1;;,.11 I I'· I I I I I I I I I I I I I I I Date : I , .. .[\ ,': -, , I( Signature: ,· Ii r-"' 1'~1 ....... \. \ I \ EPA Form 3510-9 replaced 3510-6 (8-98) "-~ ' / I THIS FORM REPLACES PREVIOUS FORM 3510-6 (8 -9 8) See Reverse for Instructions Form Approved . OMB No. 2040-0188 : NP DES FORM &EPA United States Environmental Protection Agency Washington. DC 20460 Notice of Intent (NOi) for Storm Water Discharges Associated with CONSTRUCTION ACTIVITY Under a NPDES General Permit Submission of this Notice of Intent constitutes not ice that the party identified in Section I of this form intends to be authorized by a NPDES permit issued for storm water discharges associated with construction activity in the Slate/Indian Country Land identified in Section II of this form . Submission of this Notice of Intent also constitutes notice that the party identified in Section I of this form meets the eligibility requirements in Part l.B. of the general permit (including those related to protection of endangered species determined through the procedures in Addendum A of the general permit), understands that continued authorization to discharge is contingent on maintaining permit eligibility, and that implementation of the Storm Water Pollution Pr0'18nlion Plan required under Part IV of the general permit will begin at the time the permittee commences work on the construction project identified in Secion II below. IN ORDER TO OBTAIN AUTHORIZATION , ALL INFORMATION REQUESTED MUST BE INCLUDED ON THIS FORM . SEE INSTRUCTIONS ON BACK OF FORM . I. Owner/Operator (Applicant) Information Name : Address : I I i1101J1 t&1e.1&fiiA-1'1\i 1~101AtP1 City : I Lt Ct L-t L.-1ei1(,If1 I .5tT1A1Ti !.1 'U I~ I I I I State : rr::J.29 Phone: I I I Status of Owner/Operator : II . Project/Site Information Is the facility located on Indian Country Lands? Project Name: 1liA15 tlt L,£1 ~1 AtT1~1 1.51 U.1810 tli 0t ±i.5titD1t>J1 1 1 1 1 1 1 1 I Yes 0 No [L}- Project Address/Location : 1/\J 10 I nh~ I Is:> tt: I 1& 1( I~ ~ l"-1.) I iP Ir 1o-.'1 i Ir t ,·I e I I R10 rft {J I I I I. I 01 ... ~. Ul. of SH 6 City : IY ~ L, i1G.1 b1~1 i5tT1AiT1!1D 1N1 1 1 1 1 1 I state: 1IJiJ Zip Code : l717t-'6141f1-1 I f II 0 ( o Latitude :l3tCl'3J1l1f>I Longitude :l 1q1~ll1blf1{)I County:lf1R.iA.12.101.51 I I I I I I I I I Has the Storm Water Pollut ion Prevention Plan (SWPPP) been prepared? Yes ~ No 0 Optional : Address of location of SWPPP for viewing SWPPP ~ress in Section I above 0 Address in Section II above 0 Other address (if known) below: Phone : Address : l.__...._...._....._....._..._..._....__......__.__.__.__.__.___.___.__.__..__..___..__..__.__.___,'--1'--~I _._l_._l_._I_.__..__..__, I I I City: I I I I I I I I Name of Receiving Water : 1 / 10 I Ot l 1 l.t 0 I 0 I 0 I Month Day 'rllar Month Day Year Estimated Construction Start Date Estimated Completion Date Estimate of area to be d isturbed (to nearest acre): I I I I 121Si Estimate of Likelihood of Discharge (choose only one): 1. 0 Unlikely 3 . ~nee per wee k 5. 0 Continual 2. 0 Once per month 4 . 0 Once per day Ill. Certification State : LLJ Zip Code: 1-1 I I I I I Based on instruction provided in Addendum A of the permit , are there any listed endangered or threatened species , or designated critical habitat in the project area? YesEJ No~ I have satisfied permit eligibility with regard to protection of endangered species through the indicated section of Part l.B .3.e .(2) of the permit (check one or more boxes): (a) [Q/(b) o (c)O (d)D I certify under penalty of law that this document and all attachments were prepared under my direction or supe rvision in accordance wi t h a system designed to assure that qualified personnel properly gather and evaluate the information submitted . Based on my inquiry of the person or persons who manage th is system, or those persons d irect ly responsible for gathering the information, the information submitted is, to the best of my knowledge and belief, true, accurate, and complete . I am aware that there are significan t penalties for submitt ing false in formation . including the poss ib ility of fine and imprisonment for know ing violations . \ Signature : EPA Form 3510-9 replaced 3510-6 (8 -98) [Ted Mayo -Wallace w/ UA From: To: Date: Subject: Spencer Thompson Ted Mayo 12/12/00 9:28AM Wallace w/ LJA Wallace called and asked if we got the plans . He is contacting Wallace Phillips because Phillips wants the drawings to go out to bid . He asked that you call him to confirm that we received the plans . 713-953-5232 Page 1 f lj COLLEGE STATION P.O . Box 9960 • 1101 Texas Avenue College Station , TX 77842 To: Mr. Kyle Worrell Graduate Engineer LJA Engineering & Surveying, Inc. 2929 Briarpark Drive, Suite 500 Houston, Texas 77042 From: Teddy D . Mayo, P.E. Asst. City Engineer Tet. 409 764 3500 RE: Regional Detention Pond/Channelization Crowley Tract/Castlegate Communities Date: December 06,2000 Dear Mr. Worrell : As we discussed toqay, I have. reviewed the final submittal of the construction plans for the private regional detention pond and channelization to support the Crowley Tract and Castlegate Communities Developments. Everything appears to be in order. Prior to any onsite construction you need to obtain a development permit from tfie City of College Station. Attached is a blank application form and checklist indicating required supporting material to obtain approval. Please call if you need clarification on any item. Submit the completed application along with the fee and supporting information to the City of College Station Development Services Department. We should be able to process the application the same day we receive it if everything is in order. Sincerely, --==-7---0 ZJ .7Th/;/€- Teddy D. Mayo, P.E. CC: Natalie Ruiz, Development Coordinator Home of Texas A&M University DEVELOP:MENTPERMIT ---Jf 1. Application Fee ($100) --r-k 2. Application ot:-3 . Erosion Control Plan _....,. .......... ;k 4. EPNNOI (> 5 acres) ,.V ,4.-5. Public Infrastructure Inspection Fee ($300) Reviewer: ~~ 0 k-6. Drainage Report / // /' / £ _ __._ -J 7. HOA Covenants for maintenance of detention/retention ponds /A/-/!/ 4fLer ,4.:...,.., /.tL.~,.,.;-, kl r-C) (7 / ----i'.,... .. ;k 8. Easements Dedicated (separate instrument) PA-9. TXDOT permits issued AIA-10 . Engineer's Estimates (1-4 necessary for rough gradinglclearing ....... all others necessary for full permit) o :"1cvc _ scr\forms\cngr\chklst.doc 3125/99 11of12 LJA Engineering & Surveying , Inc. 2929 Briarpark Drive, Suite 500 Hou ston , Texas 77042-3 703 www .ljaeng ineering .com Phone : (7 13) 953-5200 Fax: (7 13 ) 953-5026 LETTER OF TRANSMITTAL Date: 1217/00 To : City of College Station LJA Job No . 1649-0001 1101 Texas Avenue Attention : Mr. Ted Mayo P .E. Co ll ege Station, Texas 77842 Re: Crowley Tract Detention Pond & Channel izatio n VIA : Lonestar WE ARE SEN DING YOU the following items : o Shop Drawings D Hydro logic Calculations o Copy of Lette r D Change Order D B id Proposal Cooies Date No. 4 1217/00 ' THESE ARE TRANSMITTED as checked below: D For approval D For your use • As requested D For review & comment D Approved as submitted D Approved as noted D Returned for corrections D For signatures •Plans D Samp les D Specifications Descriotion U pdated Construction P lans From Final Review Response for Crowley Tract Detention Pond - D Resubmit __ copies for approval D Suhm.1.1:----,,.oni D FOR BIDS DUE D Prints returned after loan to us REMARKS : Please return one set ofbluelines with reviewed for comp liance stamp and signatures C:\Col legeSta\CrowleyDet\reviewrespo nsetrans2 .sf6c To: Mr. Kyle Worrell Graduate Engineer LJA Engineering & Surveying, Inc. 2929 Briarpark Drive, Suite 500 Houston, Texas 77042 From: Teddy D. Mayo, P.E. Asst. City Engineer RE: Regional Detention Pond/Channelization Crowley Tract/Castlegate Communities Date: December 06,2000 Dear Mr. Worrell: As we discussed toqay, I have reviewed the final submittal of the construction plans for the private regional detention pond and channelization to support the Crowley Tract and Castlegate Communities Developments. Everything appears to be in order. Prior to any onsite construction you need to obtain a development permit from the City of College Station. Attached is a blank application form and checklist indicating required supporting material to obtain approval. Please call if you need clarification on any item. Submit the completed application along with the fee and supporting information to the City of College Station Development Services Department. We should be able to process the application the same day we receive it if everything is in order. Sincerely, Teddy D. Mayo, P.E. CC: Natalie Ruiz, Development Coordinator COLLEGE STATION P. 0. Box 9960 • 1101 Texas Avenue To: Mr. Kyle Worrell Graduate Engineer LJA Engineering & Surveying, Inc. 2929 Briarpark Drive, Suite 500 Houston, Texas 77042 From: Teddy D. Mayo, P.E. Asst. City Engineer Tet. 409 764 3500 RE: Regional Detention Pond/Channelization Crowley Tract/Castlegate Communities Date: December 06,2000 Dear Mr. Worrell: College Statio n, TX 77842 As we discussed toqay, I have.reviewed the final submittal of the construction plans for the private regional detention pond and channelization to support the Crowley Tract and Castlegate Communities Developments . Everything appears to be in order. Prior to any onsite construction you need to obtain a development permit from the City of College Station. Attached is a blank application form and checklist indicating required supporting material to obtain approval. Please call if you need clarification on any item. Submit the completed application along with the fee and supporting information to the City of College Station Development Services Department. We should be able to process the application the same day we receive it if everything is in order. Sincerely, Teddy D. Mayo , P.E. CC: Natalie Ruiz, Development Coordinator Home of Texas A&M University COLLEGE STATION P. 0 . Box 9960 • 1101 Texas Avenue To: Mr. Kyle Worrell Graduate Engineer LJA Engineering & Surveying, Inc. 2929 Briarpark Drive, Suite 500 Houston, Texas 77042 From: Teddy D . Mayo, P.E. Asst. City Engineer Te t. 409 764 3500 RE: Regional Detention Pond/Channelization Crowley Tract/Castlegate Communities Date: December 06,2000 Dear Mr. Worrell: College Station , TX 77842 As we discussed tod,ay, I have reviewed the final submittal of the construction plans for the private regional detention pond and channelization to support the Crowley Tract and Castlegate Communities Developments. Everything appears to be in order. Prior to any onsite construction you need to obtain a development permit from the City of College Station. Attached is a blank application form and checklist indicating required supporting material to obtain approval. Please call if you need clarification on any item. Submit the completed application along with the fee and supporting information to the City of College Station Development Services Department. We should be able to process the application the same day we receive it if everything is in order. Sincerely, Teddy D. Mayo, P.E. CC: Natalie Ruiz, Development Coordinator Home of Texas A&M University ,· IA LJA Engineering & Surveying, Inc. Facsimile Cover Sheet Date: j;t / "I/ Ol) Total Pages: __ ..:S ____ _ Attention To: ft'!,, --r;cJ tr'?a~ &>~ Company: C '~> 9 f (o\1,,_. >4 .-1:°"' Fax Number: (..,10.) /l,'cf-~ 't '\\a Sender Name: \~(e-U~/1 (Including Cover Sheet) Signature (If applicable): _________________ _ (713) 953-5200 office <-fax (713) 953-5026 2929 Briarpark Drive, Suite 500 Houston, TX 77042-3703 (Please Note: If there is a problem ~ith this transmittal, please call (713) 953-5200.) rn ·d 9GOS£S6£U6:X-e.:J , LJA Engineering & Surveying, Inc. 2929 Briarparl<: Drive , Su ite S 00 Houston , T~as 77042-3 703 www.Jjaengineering.com .' Phone : (713) 953-5200 Fax : (713) 953-5026 To: City of College Station 1101 Texas Avenue College Station. Texas 77842 WE ARE SENDING YOU the following items: lA LETTER OF TRANSMITTAL Date: 12/4/00 LJA Job No. 1649·0001 Attention : Mr. Ted Ma o P.E. Re : Crow le ' Tract Detention Pond & Channelization VIA: Mail 0 Shop Dra·wings o Hydrologic Calculations D Plan CJ Samples D Specifications • Copy of Letter o Change Order o Bid Proposal 1214100 THESE ARE TRANSMITTED as checked below: Cl For approval o For your use • As requested D Approved as submitted o Approved as noted o Returned. for corrections D For sign.arures Construction Plan Review Response for Crowley Tract Detention Pond D Resubmit __ copies for approval o Submit ___ copies for distribution D Return corrected prints o~---~--~----0 For review & comment o FOR BIDS DUE o Prints returned after loan to us c: File; Ted Mayo , P .E . ______ _ Kyle Worrell , Graduate Engineer c :1C:oJ lcgt S 1tlCro w l t~D e1\rt--i c-.i.'l't.l po n !Clra n ~.doo oo. 17 Jaa 9lOS£S6£U6:Xe.:J _LJ __ A_E __ n_g_in_ee ___ n_n_g.._& __ s_u_r_Y_e_y_in_g..._,_ln_c_. _________________________________ ~~ 29 29 Sr lsrpe11< Driv e Suite 500 Houston , Texas i7042..Ji03 December 4 , 2000 Pn on-;; 713.95 3.5200 FBJ 713.9 53.5026 www.lja engine er ing .com City of College Station Development Services .A'llf(/ Ted Mayo, P .E . c::?' Assistant City Erigineer 1101 Texas Avenue College Static~ TX 77842 Re : Construction Plan Rev iew for Crowley Tract Detention Pond and Channelization College Station , Brazos County , Te xas LJA Job No.: 1649-0001 (2 .0) Dear Mr. Mayo : The followin g information is provided to address the Ci ty 's comments on the reference d project: Construction Plan Review Response Detent ion pond side slopes were adjusted to accommodat e for proposed jogging trail ramps to be placed from top of berm to bottom of detention pond at a minimum of20: I slope. A temporary 36" C.G.M.P . drain was placed to relieve water retention due to proposed fill of existing tributary of Spring Creek. An additional s heet was added to detail the detention p ond side slopes at the proposed jogging trail ramps showing x and y coordinates , and elevations. Proposed coordinates and flow-lines were also shown for temporary drain. If you have any questions or need additional information, please call me at (713) 953 -5222 . Sincerely, Kyle L. Worrell Graduate Engineer KLW/skc \Ujn hfsD l \A~hivc\LAND \1 6~9\J 6~90001 ICS 2nd rt.lp<>nl@ .doc 9(:0S£S6£U6:XE.:J IJ[l IA LJA Engineering & Surveying, Inc. Facsimile Cover Sheet Date: __ l_~__./'----'-1 ..,._/_..O;........=u'---------Total Pages:_~~....:....---- (IccJudiog Cover Sheet) Attention To: r(),. --r;_ot y{)gt o Company:_....;:c_...._,_·d4-=J-J-.M." _.,.£_....:!::C....:=a~\ l~e....:::,.~....._e_S=-iil.:::llo-......L,;i~!....11!!0:.::;.;i"'~------- Fax Number:__._(q~/,__9...._~_,.__{--'--"'L,,__4....._-_..3___,4'--'~~ln-________ _ Sender Name: \(y l(e Word I l Job #: IL, 49 -Oo<> I Title: ______________ _ Comments: __________________________ _ Signature (If applicable): _________________ _ (713) 953-5200 office'> fax (713) 953-5026 2929 Briarpark Drive, Suite 500 Houston, TX 77042-3703 (Please Note: If there is a problem with this transmittal, please call (713) 953-5200.) TO "d 9GOS £S6£1l6:Xe..:J tin 0 0 u OJ p .. x '° LL a: t) _J ~ .j ~ 1. ~ ~ J.: \ w ..t: l I i I I i i \ \ i ~.·· ( r-tti" I I , L.IA Engineering & Surveying, Inc. IA 2929 Briarpark Drive, Suite 500 Houston , Texas 77042-3703 www.ljaengineeri ng .com Phone : (71 3) 9 53-5200 Fax : (71 3) 9 53 -5026 To : City of College Station 1101 Texas A venue LETTER OF TRANSMITTAL Date: 12 /4/00 LJA Job No . 1649-0001 Attention: Mr. Ted Mavo P .E . ~~o/l I College Station, Texas 77842 Re : Crowley Tract Detention Pond & Channelization VIA : Mail WE ARE SENDING YOU the following items : D Shop Drawings • Copy of Letter Co ies D Hydrologic Calculations D Plan D Samples D Specifications D Change Order D Bid Proposal Date No. 12/4/00 Descri tion Construction Plan Review Response for Crowley Tract Detention Pond THESE ARE TRANSMITTED as checked below : D For approval D For your use • As requested D For review & comment o FOR BIDS DUE D Approved as submitted D Approved as noted D Returned for corrections D For signatures D Prints returned after loan to us D Resubmit __ copies for approval D Submit ___ copies for distribution D Return ___ corrected prints o ___________ _ REMARKS : ________________________ _ c : File ; Ted Mayo , P .E . ______ _ SIG'!J;'.D '~L ~- -fp (Kyle Worrell, Graduate Engineer C:\Coll egeS ta\Crowley Det\reviewres ponsetran s.doc _L_J _A __ E_n_g_in __ e _e _ri_n_g __ & __ s _u_r_v_e_y_i_n_g_,_1n __ c _. _________________________________ ~~ 2929 Briarpark Dri ve Suite 500 Ph one 713 .953 .5200 Fax 713.953 .5026 Houston , Texas 77042-3703 www.ljaengineering .com December 4, 2000 City of College Station Development Services Ted Mayo , P.E. Assistant City Engineer 1101 Texas Avenue College Station, TX 77842 Re: Construction Plan Review for Crowley Tract Detention Pond and Channelization College Station, Brazos County , Texas LJA Job No.: 1649-0001 (2 .0) Dear Mr. Mayo : The following information is provided to address the City's comments on the referenced project: Construction Plan Review Response Detention pond side slopes were adjusted to accommodate for proposed jogging trail ramps to be placed from top of berm to bottom of detention pond at a minimum of 20: 1 slope. A temporary 36 " C.G.M .P. drain was placed to relieve water retention due to proposed fill of existing tributary of Spring Creek. An additional sheet was added to detail the detention pond side slopes at the proposed jogging trail ramps showing x and y coordinates , and elevations. Proposed coordinates and flow-lines were also shown for temporary drain. If you have any questions or need additional information, please call me at (713) 953-5222. Sincerely, Ky le L. Worrell Graduate Engineer KLW/skc \\ljahfsO l\archi ve\LAND\ 1649\1649000 I \CS 2nd response.doc 12 1 06 1 00 15 :11 '5'979 764 3496 DE VE LOP MENT SVCS TRAN SMI SSIO N OK TX /RX NO. CONNE CT IO N TEL CONNECT IO N ID START TI ME *************************** *** ACT I VITY REPORT *** *************************** 5537 1 7 139535026pp152 1 2 /06 15 :08 t','-\ l War.-~[ I _ L J ~ P~o\V\.~~ '4 ~'u ,~ h 6r~) .. CJ'(;'3 ~ c;o z.~ ~001 • FACSIMILE COVER SHEET CITY OF COLLEGE STATION DEVELOPMENT SERVICES 1101 South Texas Avenue, P. 0. Box 9960 College Station, Texas 77842 Phone (979) 764-3570 Fax (979) 764-3496 #PAGES INCLUDING COVER ~2~- If you did not receive a complete fax, please call our office immediately for a new transmittal. TO: ~\ \Q.... --+-~H--=--=----=-c:_..:_ _ _,_ ______________ ~ COMPANY: ---------------------- DEPARTMENT: --------------------- PHO NE: FAX: ------------------- PHONE: FAX: -------------------- REMARKS: D Urgent D For your review D Reply ASAP D Please Comment COLLEGE STATION P. 0 . Box 9960 • 1101 Texas Avenue To: Mr. Kyle Worrell Graduate Engineer LJA Engineering & Surveying, Inc. 2929 Briarpark Drive, Suite 500 Houston, Texas 77042 From: Teddy D . Mayo, P.E. Asst. City Engineer Te t. 409 764 3500 RE: Regional Detention Pond/Channelization Crowley Tract/Castlegate Communities Date: December 06,2000 Dear Mr. Worrell : College Station , TX 77842 As we discussed toqay, I have.reviewed the final submittal of the construction plans for the private regional detention pond and channelization to support the Crowley Tract and Castlegate Communities Developments. Everything appears to be in order. Prior to any onsite construction you need to obtain a development permit from the City of College Station. Attached is a blank application form and checklist indicating required supporting material to obtain approval. Please call if you need clarification on any item. Submit the completed application along with the fee and supporting information to the City of College Station Development Services Department. We should be able to process the application the same day we receive it if everything is in order. Sincerely, --==--7~ ZJ.~1~~ Teddy D . Mayo, P.E. CC: Natalie Ruiz, Development Coordinator Home of Texas A&M University DEVELOPMENT PERMIT _.-J! 1. Application Fee ($100) _.,......_ k 2. Application ot::-3. Erosion Control Plan __ ,,...._ .fr 4. EPAINOI (> 5 acres) ;11,4-5. Public Infrastructure Inspection Fee ($300) Reviewer:~ ok-6. Drainage Report / // /' / L) _ ___,""C",..,_ -it 7. HOA Covenants for maintenance of detention/retention ponds ( A/-/2 / -4.f'i:<,r' ho~ /.tL~n'0 ~ ~~ 17 ---;;;;:..=-k 8 . Easements Dedicated (separate instrument) fa' 4-9. TXDOT permits issued ,.VA-10. Engineer's Estimates (1-4 necessary for rough gradinglclearing ....... all others necessary for full permit) o:ldeve _ ser\fonns\engrlchklstdoc 3/25/99 11 of 12 (}COLLEGE STA::J:-ION 'Joo-Y? P. 0. Box 9960 • 1101 Texas Avenue To: Mr. Kyle Worrell Graduate Engineer LJA Engineering & Surveying, Inc. 2929 Briarpark Drive, Suite 500 Houston, Texas 77042 From: Teddy D . Mayo , P.E. Asst. City Engineer Tet. 409 764 3500 RE: Regional Detention Pond/Channelization Cro ley Ira-ct/Castlegate-Co mmunities Date: December 06,2000 Dear Mr . Worrell : College Station, T X 77842 As we discussed toe.Jay, I have.reviewed the final submittal of the construction plans for the private regional detention pond and channelization to support the Crowley Tract and Castlegate Communities Developments. Everything appears to be in order. Prior to any onsite construction you need to o otain a development permit from the City of College Station. Attachedis a 6lank application form and checkli st indicating required supporting material to obtain approval. Please call if you need clarification on any item. Submit the completed application along with the fee and supporting information to the City of College Station Development Services Department. We should be able to process the application the same day we receive it if everything is in order. Sincerely, -==-7~ Zl .~/?~ Teddy D. Mayo, P.E. CC: Natalie Ruiz, Development Coordinator Home of Texas A&M University , / DEVELOPI\IENTPERMIT -?f 1. Application Fee ($100) _..,...... k 2. Application ol::-3. Erosion Control Plan _ __,,.,,_,,_ .fr 4. EPNNOI (> 5 acres) ;114-5 . Public Infrastructure Inspection Fee ($300) Projoct Name: Ca-w~ ;,:;;/~ £!d #' z::..:4;.-;;;z Y') Review Date: / L~~ -t:J& Reviewer: ~~ () k-£,. Drainage Report / // /1 / .,{__ _ __,-..::-~ -it 7. HOA Covenants for maintenance of detention/retention ponds / A/-/2 / L#e.r ;ho..,..., /.tL~~, jL r-~ "-/ _---;:;;;.--~ )\ 8 . Easements Dedicated (separate instrument) ,..VA-9. TXDOT permits issued ..VA-10. Engineer's Estimates (1-4 necessaxy for rough grading/clearing ....... all others necessary for full permit) o:'kvc _ scr\forms\engrl,chkht.doc 3/25/99 11of12 STAFF REVIEW COMMENTS MISCELLANEOUS Project: DP-CASTLEGATE SUBDIVISION-DEVELOPMENT PERMIT (0-500064) DETENTION POND & CHANNELIZATION ENGINEERING 1. All concerns as noted in Engineering Review Comments No. 3 dated 10/23/00 have been addressed satisfactorily in your transmittal of November 02,2000. The construction plans have been stamped " Reviewed for compliance". Reviewed by: Teddy D. Mayo, P.E. Date: 11/09/00 ~ NOTE: Any changes made to the plans, that have not been requested by the City of College Station, must be explained in your next transmittal letter and "bubbled" on your plans. Any additional changes on these plans that have not been pointed out to the City, will constitute a completely new review.STAFF REVIEW COMMENTS ..,.--'· ·. ·_L_J_A_E_n-:;g_in_e_e_r_i_n_g_& __ s_u_r_v_e_y_i_n~g~,_l_n_c_. ________________________________ l~ 2929 Bria rpark Drive Suite 500 Houston. Te xas 77042-3703 November 2, 2000 City of College Station Development Services Ted Mayo, P.E. Phone 71 3.95 3.5200 Fa x 71 3.953.5026 www .ljae ngine ering .co m Assistant City Engineer 1101 Texas A venue College Station, TX 77842 Re: Construction Plan Review for Crowley Tract Detention Pond and Channelization College Station, Brazos County, Texas LJA Job No.: 1649;_0001 (2 .0) Dear Mr. Mayo : The following information is provided to address the City's comments on the referenced project: Construction Plan Review Response ~ Flowline grades were placed at the intersections of low flow gutters on Sheet No. 4 . ~ Flow line grades were placed upstream and downstream of drop structure on Trib. "C", and 6" concrete slope protection callout was changed to 5" on Sheet No. 5. / Reproduction of bluelines will be processed to improve the visibility of the existing topography. At this time no separate topographic map is being provided. Hydraulic & Hydrologic Review Response / j The changes in cross section location are based on the submitted design . The model containing these changes, were sent to you on October 23 , 2000. This model will be submitted to Federal Emergency Management Agency (FEMA) as a LOMR once we have as -built information from the construction of all channel improvements . The decreased Water Surface Elevations (WSE) on the Spring Creek A 1 are caused by a decrease in the WSE on Spring Creek due to the downstream channel improvements. The WSE in the channel translates to a lowered backwater from the confluence of Spring Creek A 1 and the Spring Creek Main Channel. Channel A 1 has not been improved in the HEC-RAS model nor are there any plans to do so at this time. ./ ,.Mr. TedMayo,P.E. November 2, 2000 Page2 /.' The maximum design velocities in Tributary C reach 18 fps. These velocities are located at the proposed drop structure. This drop structure causes the flow in the channel to become supercritical near the upstream end of the drop structure. To ensure that the channel will be protected from erosion, concrete slope protection will extend 50-feet upstream and downstream of the 12-foot long drop structure. An additional 20-feet of riprap will line the channel upstream and downstream of the concrete slope protection. We have analyzed the velocities created by this drop structure for the 25-year and 100- year flows and have determined that the hydraulic jump will be contained within the lined channel. ~-The culverts on Spring Creek A2A and A2B were not included in the CLOMR model, because of possible changes in the landplan at the time of submittal. These culverts will be designed within the internal cell development and will need to be reviewed at that time. All improvements to these tributaries will need to be designed with no impacts to offsite WSE's. Improvements to the tributaries under proposed State Highway 40 will be the responsibility of the Texas Department of Transportation (TxDOT). At the time of the CLOMR submittal, TxDOT had not yet initiated the design process. Coordination will have to be established between TxDOT and the Developer during the initial design of the tributaries under State Highway 40. All imprgyements to these tributaries will need to be designed with no impacts to offsite WSE's. / V During our analysis of the Spring Creek drainage area for the site, we considered this tributary as a minor swale. This swale extends northward terminating near the property line. This area will be designed within the internal cell development and will need to be reviewed at that time . All improvements to this swale will need to be designed with no impact to offsite WSE. Please find attached 3 sets of revised plans for your use . If you have any questions or need additional information, call me at (713) 953-5232. Wallace E. Trochesset, P. E . Senior Project Manager Attachment \\UAHFSOl\WORK\LAND\1649\CS n:sponsc.doc -------------- .. ~~~~~~~~-rri-~~~~~~~~~~~~-~-- Castle Gate Comments: Spencer Thompson 10123 100 1. The cross sections in the HEC-RAS output spreadsheet you included with your detention pond construction documents do not match cross sections from the submitted CLOMR file. Please submit the new HEC-RAS model with the updated data. When will you be updating your submittal to FEMA? 2 . The stream section Spring Creek A-1 appears to be modeled as an improved channel. Could you please explain why the model appears this way as it is not designated as an improved section? 3. According to the output spreadsheet the stream velocity in Tributary C Upper Reach is 18 fps. Could you explain this and will there be any detrimental effects due to this extreme velocity? 4. The following culverts were not included in the model: On Spring Creek/ A2A under Castle Gate Dive On Spring Creek/ A2B under Castle Gate Dive On Spring Creek/ A2 under proposed Hwy 40 On Tributary Bl Bl and Tributary B l B2 under proposed Hwy 40 Seeing as these culverts will have an impact on stream hydraulics, floodplain elevation, floodplain locaflon, and detention pond sizing why are they not included in the model? 5. There is a small tributary to Spring Creek/ A2A that crosses Victoria that neither appears in the HEC- RAS model nor has a 100-year floodplain associate with it. Please explain. lo-2@ ---c.--~~6'~1 ~/?....-(!_ vJa-l )00-\ ~ ~~ cµ~i. ~ ~\. ~v-l,~ -1-~ oo\ ~rJ~ -5 j,../~ @ A I OT ' ~~~~~~~~~~~~~---z ________ _ :.7 LJA Fax:97139535026 Sep 1 '00 9:23 P.01 IA LJA Engineering & Surveying, Inc. Facsimile Cover Sheet Date: CJ-I ... 0~ Total Pages: __ __.9L...-__ _ (Including Cover Sheet) Attention To: j;4 ~ yO. ) /?E Company: iliefol'_,_j J;..,"1~<1 1 .4.s:I~h.-1 c,·; b)t?~4- Fax Number: (3)9} 2'4 -~Cfl Job#: ________ _ Title:. ______________ _ Re: ...... C.=-~-a..J-6~-; ~-~-<--_J _a_o_· J1VJ_ft. ______ _ Comments: fr V'-"'1-fo ,lJ, • p/t:.it.J c. /Jdl :;:F? Signature (If applicable):_~------------------ (713) 953-5200 office + f:a1 (713) 9S3-S026 2929 Briarpark Drive, Suite 500 Hou&ton, TX '77042-3703 (Please Note: If there is a problem with this transmittal, please call (713) 953-5200.) .. UR Fax:97139535026 Sep 1 '00 P.02 ~L~J~A~E~n~g~i_n~e_e_r_in•g=-& ___ s_u_r_v_e_y_i_n~g_,_1n_c __ • _________________________________ ~~ 29 29 Briarparl<. Drive Si.:i reSOO H01Jston , Ti~8S 77042·3 703 August 29, 2000 Phone i i3 .953.5200 Fax 713 .953.5026 www .lj aeng ini ering .com Mr. Monther S. Madanat, P .E. Michael Baker Jr., Inc. 3601 Eisenhower Avenue , Suite 600 Alexander, VA 22304 Re: Spring Creek Conditional Letter of Map Revision Case Number: 00-06-844R Community: City of College Station , TX Community Number: 480083 Job Number 4591-9935 (8.2) Dear Mr. Madanat: The following information is in response to your review comments dated August 10, 2000. Comment No. 1 The submitted revised HEC-1 hydrologic analysis is based on proposed warershed characteristics and proposed project improvements. In some cases, the computed discharge values for the flood having a I-percent chance of being equaled or exceeded in any given year (base flood) were not correctly incorporated into the proposed conditions HEC-RAS hydraulic model. • For Spring Creek Tributary A . a discharge value of 622 cubic feet per second {cfs) was computed in HEC-1 , hut a discharge value of 339 cft was used in HEC-RAS • For Spring Creek Tributary D upstream of the detention area, a discharge value o/876 cft was computed in HEC-1, but a discharge value o/751 cfs was used in HEC-RAS. • For Spring Creek downstream of the project area, a d;scharge value of 3,874 cft was used computed in HEC-1, bur a discharge value of 3, 74 9 cfs was used in HEC-RAS. • For Spring Creek just upstream of the detention basin a discharge value of 2,930 cfs was computed by HEC-1, but a discharge value of 2,465 cfs was used in HEC-RAS to model the proposed culvert. Approved CY\' Man~g er, Hydrology and H ydraul ics LJA Mr. Monther S. Mandat, P.E. August 31 , 2000 Page 2 of9 Fax:97139535026 Sep 1 '00 9:23 P.03 Please make the appropr iate changes to rhe HEC-RAS model, or provide an explanation Jo~ these discrepancies. Responses • There is no Tributary A. Based upon the discharge it appears that this comment is for Tributary C. The discharge at 339 cfs is appropriate for the upstream cross sections only. To correct this the HEC-RAS discharge changed to 622 cfs. This revision has no significant impact to the water surface for this tributary and any increases to the water surface are on-site and contained within the proposed channel. • There is no Tributary D. Based upon the discharge it appears that this comment is for Spring Creek Reach A2A. The proposed condition Spring Creek Reach A2A discharge of 876 cfs was reduced to the existing condition discharge of 751 cfs for all HEC-RAS cross sections outside of the Crowley Tract. This was required because the current sub-areas used to compute discharge rates in the CLOMR are not sub-divided along property tract boundaries. Therefore , wherever HEC-RAS tributaries or reaches extend beyond the boundaries of the 735-acre Crowley Tract , the discharges were reduced to the discharges used to compute the current FEMA BFE's. • The HEC-RAS flow distributions for lower Spring Creek have been revised to better reflect the 3,874 cfs discharge at the mouth . This revision has no significant impact to the 100-year water surface in the effected reach . • The flow distribution for Spring Creek was reviewed and approved by the City of College Station, however using 2,930 cfs through the Spring Creek culverts upstream of the first detention pond appears to be justified. The CLO MR HEC-RAS model flows have been revised accordingly , and have no significant impact to on-site or off-site water surfa~e elevations. Comment No. 2 With the February I 4 request, Mr. Jeff Tondre , P.E., formerly with the City of College Stat ion, submitted a letter from you dated February 7, 2000, containing a compa rison of effective and proposed conditions base flood elevations (BF Es) for Spring Creek and its tributaries. The BFEs computed in the proposed conditions HEC-RAS model dated April 26, 2000 , for Spring Creek Tributary C (denoted as Tributary A3 in rhe letter) do not agree with the BFEs listed in the February 7 letter. The BFEs in the letter appear to agree with the BF Es computed in a previously submiued proposed conditions HEC-R4S model dated February 3, 2000. The February 3 model, however, used discharge values outside rhe proJ<!cr lim its rhat are lower than ---------------~------- UR Mr. Monther S. Mandat, P .E. August 31. 2000 Page 3 of9 Fax:9?139535026 9:24 Sep 1 '00 P.04 those used in the April 26 model. It is not clear -.,-.,·hich of the two HEC-RAS models correctly reflects proposed conditions. Please make appropriate changes to the HEC-RAS model, or provide an explanation. Responses • The HEC-RAS model CS.PRJ has been included as an attaclunent, which incorporates all of our responses to your Comment No. 1 above. The profile tables have been updated and are provided below. Effective FIS is based upon latest Spring Creek Effective model received from City of College Station and FEMA. Spring Creek 100-Year Water Surface Elevation River Station Water Surface Elevation (ft) Effective FIS Proposed 58 244.0 244.0 450 244.2 244.2 1567 245 .4 245.3 2380 246.6 246.5 3496 248.3 248.2 4072 249.0 248.9 5378 250.3 250.3 6761 252.0 251 .9 7430 253.6 253.5 8089 256.0 255 .9 9289 259 .2 259.0 10903 262.3 262.2 11165 262.8 262.7 11309 264.0 263.8 11369 264.0 263.8 11517 264..2 264 .l O:\l..,ND'.41911A591?9:l 51 CLMR·lli.SP ,do< ----------------- UR Fax:97139535026 Sep 1 '00 9:24 Mr. Monther S. Mandat, P.E. August 31, 2000 Page 4 of9 Spring Creek 100-Year Water Surface Elevation River Station Water Surface Elevation (ft) Effective FIS Proposed 11702 11872 264 .0 264.S 12362 267 .9 265.0 13165.5 266.4 13732 268.2 267 .l 14390 268.6 270.I 14860 270.3 270.9 15655 271.6 272 .0 15853 272 .0 272.3 16356 273 .8 272.4 16464 274.3 274.4 16733 274.8 274 .5 17693 278.2 278.0 18052 279.2 278.8 18281 279.2 278.9 18718 280.2 280 .0 18931 281.4 281 .l 1S990 281.2 280.9 19465 284.2 284.2 19948 285.8 285.7 20939 289.l 288.9 21857 291.8 292.3 21905 292.0 292.4 22036 292.1 292.S 23099 294.3 293.6 23952 297 .9 297.8 24262 298.1 298 .1 25107 299.0 298. O:ILAMJ\4S9 I \aS9199J S\C L1'4R·JU:S P.doc: --------------------------- P.05 LJA Mr. Monthcr S. Mandat, P .E. August 31 , 2000 Page 5 of9 Fax:97139535026 Sep 1 '00 Spring Creek 100-Year Water Surface Elevation Ri·Hr Station Water Surface Elevation (ft) Effective FIS Proposed 25321 300.5 300.3 25728 301.3 300.4 26398 303.8 306 .0 26794 305 .6 306.1 27110 308.4 308 .2 27184 309 .0 308.9 27357 309.9 309.9 28990 313.4 313.4 29184 313.7 313.7 29540 317 .6 317.6 29591 318.2 318.2 Spring Creek Trib C 100-Year Water Surface EleYation Rinr Station Water Surface Elevation (ft) Effective FIS Proposed 0 264.4 264.5 31 264.4 264 .5 304 264.4 264.5 560 264 .6 264.6 828 264.5 265.2 923 265 .9 265 .7 982 266.6 266.0 1190 269.3 270.0 1342 270.2 270.l 1542 271.8 270 .2 O:ll..11l'I0\4S9l\4S9199351CLMR·IU;Sl'.doc P.06 LJA Fax:97139535026 Sep 1 '00 Mr. Monther S. Mandat, P.E . August 31 , 2000 Page 6 of9 Spring Creek Trib A3 100-Year Water Surface Elevation River Station Water Surface Elevation (ft) Eff cctive FIS Proposed 0 274.4 274.I 223 274.3 274 .1 300 274 .6 274.7 550 278.2 278 .7 794 280.2 280 .6 989 280 .7 281 .1 1080 281.7 281.I 1200 283.5 283.5 1628 285.8 285.8 Spring Creek Trib B -Reach "Lower" & "B2" 100-Year Water Surface Elevation River Station Water Surface Elevation (ft) Effective FIS Proposed 0 270.6 270.6 246 270 .6 271.2 494 270.8 271.5 791 271.5 272.2 1276 274 .8 275.4 1569 275.6 276.2 1752 276.0 276.4 2366 277 .4 277.6 2559 277 .7 278.3 2839 281 .7 279.9 3012 283.2 281.7 3313 286 .0 284.0 P.07 ... LJA Fax:97139535026 Sep 1 '00 Mr . Monther S. Mandac, P.E. August 31, 2000 Page 7 of9 Spring Creek Trib B -Reach "Lower" & "B2" 100-Year Water Surface Ele"·ation River Station Water Surface Elevation (ft) Effective FIS Proposed 3612 287.2 286.5 3919 289 .1 288.9 Spring Creek Trib B -Reach "Bl" 100-Year Water Surface Elevation River Station Water Surface Elevation (ft) Effective FIS Proposed 0 277.7 278.3 123 278 .8 279.2 450 285.4 283 .0 605 286 .6 285.8 Spring Creek Trib Al 100-Year Water Surface Elevation River Station Water Surface Elevation (ft) Effective FIS Proposed 0 279.2 278 .9 762 279 .4 279.2 1251 280.0 279.9 P.08 . . .. LJA Mr. Monther S. Mandat, P.E . August 31, 2000 Page 8of9 Fax:97139535026 Sep 1 '00 Spring Creek -Reach "A2B" 100-Year Water Surface Elevation Rh,.er Station Water Surface Elevation (ft) Effective FIS Proposed 0 300.6 300.4 436 302.0 302.7 723 305.1 306.1 1007 306.9 307.9 1126 308.9 310.0 1426 311.5 312.4 1545 312.5 313.4 1669 315.0 315.7 1846 317.1 318.0 1976 318.5 319.4 2051 320.3 321.0 2110 321.4 322.0 2190 323.1 323.4 P.09 Should you have questions or need additional information, please contact me at (713) 953-5299 ~y, Noel S. Atkisson, P .E. Project Ma~ager, Hydrology and Hydraulics NSA/cd Enclosures c: Mr. Tim Crowley, Crowley & Douglas, L.LP. L __ J_A_E __ n_g~in __ e_e_r_in~g~& __ s_u_r_v_e_y_i_n_g_,_1_n_c _. _________________________________ ~~ 2929 Briarpark Dr ive Su ite 500 Houston , Texas 77042 -3703 December 9, 1999 Mr. Jeff Tondre , P.E Phone 713.953.5200 Fa x 713.953.5026 www .ljaengineering .com City of College Station Development Services College Station, Texas 77842 Re : Spring Creek Conditional Letter of Map Revision 735-Acre Crowley tract LJA Job Number 4591-9935 (8.2) Dear Mr. Tondre: Three copies of the report , Spring Creek, Request for Conditional Letter of Map Re vision for the 735-acre Crowley Tract is being transmitted for your review and comments . If you concur with the findings of this report , please complete the Community Acknowledgment, MT-2 , Form 1, in each copy and transmit one copy to FEMA , returning a completed copy to LJA Engineering and Surveying. One copy is for your files . We hav e also transmitted two copies to Brazos County for their concurrence . Should you have questions or need additional information, please contact me at (71 3) 953-5299 Sincere ly, 1/~ Noel S. Atkisson, P.E. Project Manager, Hydrology and Hydraulics NSA/mc Enclosures c : Mr. Tim Crowley , Crowley & Douglas , L.L.P . u O :\LAND\459 1 \4 59 19935 \CLMR-CS .DO C L __ J_A __ E_n_g_in __ e _e_r_in_g __ & __ s_u_r_v_e_~_i _n_J,_,_ln __ c _. ________________________________ ~-~ 2929 Briarpark Drive Suite 500 i . .. Phone 713 .053.5200~ Fax 713 .9'53.5026 Houston , Texas 77042-3703 www.ljaengineering.com To: From: Date : Re: Memorandum Jeff Tondre Carolyn Gilligan, P.E. 116199 Spring Creek Hydrology Model LJA No. 4591-0001 In response to your questions as to the source of data used in the Spring Creek model , I have enclosed copies of the NUDALLAS printout we received from FEMA. The 90% sand value was utilized for all subareas in the NUDALLAS model including the Spring Creek subarea. The SF factor was derived using a weighted sum, (1.76 x %sand)+ (.94 x (1-%sand). The NUDALLAS output shows a value of 3908 cfs outflow from the Spring Creek subarea. Since we were extending the FEMA model up Spring Creek, we calibrated the HEC-1 model to achieve a total outflow of approximately 3908 cfs. If you have any further questions , please contact us at the above address , or by phone (713)953 - 5275. u O:\ARCHIVEILAND\459 114591000 I \QUESTRES . WPD ---~ -------------- --------------1-+---- -------- £..~ 5~7~<:/t?~ ~ ~ oa - ,~ o~ ~---,~ J r""" 5 -- 14 rr % Ob -71+ ~~fY) --+-- ------ I 1 L _____ ~ I I ----:----=_j -4 ---' __ -I --! I r--~ i) itV~~ IJ~~~w:>~~&u~ lt~~~) {~~~?~ ~ t\.Cl ~ .\.\J-., e.v.bch.-~ ~)~~~~~-~ "* 0'<-w\ ~~ ~ ~~ ~ ~ ili -~ 0 \)\!.-1>1\~~ IJ.P ~ ~ ~ ~ w:t .~ ~~t:n+\ ~ ~~Q_~~Jw-&'ia -~~1o ~ ~~~-·~··~~~~ ~ ~ 9{W""' ewJa l O~-~~I ... \='~~ ~ "') ~ ...r-L\~~c\.r~ ~ ~ ~1-~ ~~~~<s·~ (L1 ~ ~· ~ \ao ~-~~ ~~~~u)/ ~) ' -. . l ,, ; _L_J_A_E~n_g_in_e~e_ri_n_g __ &~S_u_r_v_e_y_in __ g_,_1n_c~·~~~~~~~~~~~~~~~~~-~ 2929 Briarpark Drive Suite 500 Phone 713 .953 .5200 Fax 713.953 .5026 Houston , Texas 77042-3703 November 24, 1998 Ms. Veronica Morgan City of College Station Development Services College Station, TX RE: Spring Creek 100-Year Floodplain LJA Job No. 4591-0001-035 Dear Ms. Morgan: Approximately 735 acres of land in the Spring Creek watershed is proposed to be developed. Although the Federal Emergency Management Agency (FEMA) has hydrologic and hydraulic models of Lick Creek, a detailed hydraulic analysis of Spring Creek (a tributary of Lick Creek) was not done for the existing Flood Insurance Study (FIS). Plus, the Lick Creek FEMA model was prepared by the United States Army Corps of Engineers (USACE) Fort Worth District using a program developed by that office (NUDALLAS). To assess the effects development will have on Spring Creek, the City of College Station Development Services would like the FEMA model expanded to provide a detailed model of Spring Creek. However, the City of College Station Drainage Policy requires a different hydrology method than was used in the FEMA study. To be consistent with the existing FIS and be acceptable to the City of College Station, the following methods were used to develop the Spring Creek 100-year floodplain. The existing FIS model has a different precipitation distribution and method of developing unit hydrographs than the City of College Station Drainage Criteria requires .. Instead of the SCS method required by the City of College Station, NUDALLAS uses the Snyder method to develop unit hydrographs and calculates the basin lag time based on the following equation: Where: TL = basin lag time (hours) L =length of the main stream (miles) LcA =stream distance to the point nearest the centroid of the basin (miles) SST= weighted stream slope (feet/mile) DLU =percent of urbanization expressed as a fraction SF= factor equal to 1.76 for sand and 0.94 for clay. According to Mr. Craig Lofton of the USACE Fort Worth District office, value of the peaking coefficient (Cp) is not calculated by NUDALLAS; an appropriate Cp value is determined by the modeler and entered into the program. The Cp used in the FIS was 0 .72. O:IARCHIVE\LAND\4591 1459 1000 1\COCSLET .WPD Ms. Veronica Morgan November 24, 1998 Page 2 of2 For this analysis LJA used the USACE HEC-1 program for the hydrologic analysis. To match the existing FIS as closely as possible, the following procedure was followed: • To match the FIS , the precipitation pattern from the existing FIS was used rather than the SCS Dimensionless Unit Hydrograph called for by the Drainage Criteria • The single Spring Creek basin used in the existing FIS model was divided into seven smaller subareas totaling 3.78 square miles . • Unit hydrographs were computed using the Snyder method , which is an available option in HEC-1. The basin lag time was calculated using the methodology of the NUDALLAS program. • To match the FIS , the precipitation pattern from the existing FIS was used rather than the SCS Type II precipitation distribution called for by the Drainage Criteria. • The Uniform Loss Rate option was used with the same values as in the existing FIS. • As explained previously, for the existing FIS , an appropriate CP value was determined and used for all sub-basins in the study. In this study CP was adjusted so the existing condition outflow to Lick Creek from Spring Creek would match the existing FIS flows. Through trial and error CP was set at 0.42. This value generated a flow of 3935 cfs from Spring Creek for existing conditions. In the existing FIS the flow from Spring Creek is 3908 cfs. The hydraulic analysis of Spring Creek was modeled using the USACE HEC-RAS computer program. Cross-section data was taken from a photogrammetric topographic map of the area, plotted at 1: 100 scale. Copies of the plans for the State Highway 6 bridges over Spring Creek obtained from the Texas Department of Transportation provided bridge model data. The 100-year base flood elevation of Lick Creek at the confluence of Spring Creek was obtained from the FIS and used for the downstream boundary condition. The resulting 100-year water surface elevations from the HEC- RAS model were plotted on the topographic map to delineate the Spring Creek floodplain. If you have any further questions about the methodology used for this study , please contact us . Sincerely , C ~olynGi gan,~a,.J Manager -Hydrology and Hydraulics CG/pc O:\ARCHIVE\LAND\459114591000 1\COCSLET.WPD l J IA LJA Engineering & Surveying, Inc. Facsimile Cover Sheet Date: 12~30-98 Total Pages: 11 (Including Cover Sheet) Attention To: JeffTandry Company: City of College Station Fax Number: (409) 764-3496 Sender Name: Chad Johnson Job#: 4591-0001 ' Title: Re: HEC-1 Input data for Crowley Tract Comments: Signature (If applicable): (713) 953-5200 office fax (713) 953-5026 2929 Briarparlt Drive, Suite 500 Houston, TX 77042-3703 (Please Note: If there is a problem with this transmittal, please call (713) 953-5200,) 1 'd 1E9'0N ~NIA3 A ~ns ~ ~NI~33NI~N3 ~fl W~l70:01 _8661 '0E 'J3Q __ _ ----------------------- (\J Q ..--t Pl \D 0 z: l9 z: H )-w > (}:'. :::J {f) c1! l9 z: H (}:'. w w z: H l9 z: w CI .., ...J :E CI If) IS) IS) ..--t OJ en en ..--t IS) Pl u w p BASlf.{ -_----_ : --A1 A2 A2A A2B A3 B C1 C2 D _BASIN A1 A2 A2A A2B A3 B C1 C2 D -._AREA -·µis E!'.---($(f mi) _, : (ft) -0.93 310 0.34 290 0.42 320 0.08 320 0.37 300 0.30 305 0.10 320 0.26 290 0.96 255 3.78 AREA U/SEL -(sq mi} -{ft) -0.93 310 -0.34 290 0.42 320 0.08 320 0.37 300 0.30 305 0.10 320 0.2.6 290 0.98 255 3.78 Computation of Watershed Lag Time for Spring Creek EXISTING Ql$E,L· ---F~o.w·, PAT_H 'ill!AJERStfE_Q Sb,_QP, ,-.--1;.~:-_ _% 1MP, _ --~-~a8,Q"-LJrban~~tiqn --Tl::-___ -=-(ft)• --:" -_ :-·(ttL ' ____ ~---_{mile~!--~ -'% --: _(ffl:mif--: , .--(mi). : ----(h~i.lr!?1 -. -. ---------:. --..: ----280 11250 2.13 0.356 16.773 1.250 0 90 0.000 1.392 280 6645 1.30 0.195 10.285 0.793 0 90 0.000 1.085 300 5330 1.01 0.500 26.417 0.606 0 90 0.000 0.742 300 2450 0.46 1.088 57.469 0.280 0 90 0.000 0.353 270 6132 1.16 0.652 34.442 1.080 0 90 0.000 0.929 270 6725 1.27 0.694 36.639 0.663 0 90 0.000 0.769 270 2149 0.41 3.102 163.797 0.149 0 90 0.000 0.216 270 4512 0.65 0.591 31.2.06 0.673 16.27 90 30.800 0.581 240 9830 1.66 0.203 10.743 1.226 3 90 7.000 1.400 PHASE 1 [)IS E!-FLQW_ PATH-WATERSfiE_D SLOPI c Lest %1MP % sancf Urb~aiz'atJ0!1 TL (ft) -(ft) -{miles) {%) (~mi) _ -(mi): (hours} 260 11250 2.13 0.355556 18.773333 1.25 0 90 0.000 1.392 280 6845 1.30 0.194789 10.284879 0.7926136 33.38 90 70.190 0.706 300 5330 1.01 0.500313 26.41651 0.6060606 1.5 90 0.000 0.742 300 2450 0.46 1.088435 57.469388 0.280303 12.16 90 21.810 0.309 270 6132 1.16 0.652316 34.442.27 1.0795455 0 90 0.000 0.92E} 270 6725 1.27 0.693928 36.639405 0.662.8788 0 90 0.000 0.789 270 2149 0.41 3.102218 163.79711 0.1488636 0 90 0.000 0.216 270 4512 0.85 0.591017 31.205674 0.6725379 16.27 90 30.800 0.581 240 9830 1.86 0.203459 10.742625 1.2263258 3 90 7.000 1.400 ..-f fol UJ 0 z: l9 z: H )-w > Cl:'. =i in cXS l9 z: H Cl:'. w w z: H l9 z: w a: .. _J E: a: lf) IS) IS) C•l u w p _ JJAS.l['l AREA (sq mi)_ A1 0 .92 A2 0_31 A2A 0.43 A2B 0.14 A3 0.45 B 0 .35 C1 0_10 C2 0 .26 D 0.98 3.94 ULTIMATE U/SEL -PIS EL FU)W-PATH - (ft} (ft) -_ -(ft) _(miles) - 310 280 11250 2-13 290 280 6845 1_30 320 300 5330 1 .01 320 300 2450 0.46 300 270 6132 1.16 305 270 6725 1 .27 320 270 2149 0.41 290 270 4512 0 .85 255 240 9830 1 .86 WATERSHED"SLOPE - -Lea ---·-_% IMe -: % S;;yid _ ·urb~ni~ti~n l\ (%). _ {fttmi} --(mi) --(hou~)-- 0 .355556 16.773333 1_25 0 90 o_ooo 1.392 0 .194789 10.284679 0_7926136 44 .32 90 100 .000 0.588 0_500313 26 .41651 0.6060606 11 .28 90 20 .000 0 .657 1.086435 57_469388 0.280303 44 .78 90 100 .000 0 .191 0.652316 34.44227 1 .0795455 11.49 90 42 .000 0.718 0 .693928 36 .639405 0 .6628768 50 .47 90 87.000 0 .463 3.102218 163.79711 0.1488636 74.77 90 100 .000 0_ 117 0 .591017 31 .205674 0 .6725379 27.05 90 49 .490 0 .518 0 .203459 10.742625 1 .2263258 3 90 7 .000 1.400 • ID Crowley Trnc:t ID College Station, Texas ID IT 15 09Sep98 0000 300 IO 5 * E.xistlng Condiiions Flow Point 1 KK A2B BA 0.08 PB 11 Collexi.ibl Pl .0176 ,0180 .0187 .0190 .0198 .0202 ,0211 .0215 .0225 .0230 PI .0240 .0245 .0257 .0263 .0276 .0282 .0297 .0304 .0320 .0328 Pl .0346 .0356 .0376 .0386 .0409 .0421 .0447 .0461 .0491 .050 7 PI .054·2 .0561 .0577 .0582 .0594 .06 .0615 .0624 .0644 .0656 PI .0684 .070 1 .0741 .0766 .0827 .0866 .0966 .1032 .1110 .11 40 PI.1207 ,1244 .1326 .13 71 .1475 ,1533 .1591 .1646 .2527 .3087 PI .4250 .5088 1.1349 1.9065 .6724 .3662 .1880 .1570 .1421 .1283 PI .1172 .1082 .0912 ,0794 .0720 .0669 .0634 .0607 .0588 .05 72 PI .0524 .04 76 .0434 .0398 .0365 .033 7 .0312 .0289 .0269 .0251 PI .0235 .0220 .020 7 .0194 .0183 ,01 73 0 0 0 0 LU 0.885 0.097 0 us 0.353 .42 KK·>scA2 RS 1 STOR -1 SV 0 2.56 3.43 4 .24 5.02 5.76 SQ 0 82 ,8 124.2 165 .6 207 248 .4 • "' Flow Po int 2 KK A2A BA 0.42 PB 11 Pl .0176 .0180 .0187 .0190 .0198 .0202 ,0211 .0215 .0225 ,0230 PI .0240 .0245 ,0257 .0263 .0276 .0282 .0297 .0304 .0320 .0328 PI.0346 .0356 .0376 .0386 .0409 .042 1 .044 7 .0461 .0491 .0507 PI .0542 .0561 .0577 .0582 .0594 .06 .0615 .0624 .0644 .0656 Pl .0684 .0101 .0741 .0766 .0827 .0866 .0966 .1032 .1110 .1140 PI .1207 .1244 .1326 .1371 .1475 .1533 .1591 .1646 .2527 .:087 PI .4250 .5088 1.1349 1.9065 .6724 3662 .1880 .1510 .1421 .1283 PI .1172 .1082 .0912 .0794 .0720 .0669 .0634 .0607 .0588 .05 72 PI.0$24 .0476 .0434 ,0398 .0365 .0337 .0312 .0289 .0269 .0251 PI.0235 .0220 .0207 .0194 ,0183 .0173 0 0 0 0 LU 0.885 0.097 O us 0.742 .4 2 KKtoscA2 RS 2 STOR -1 SV 0 13,34 18.13 22 .55 26 .76 30 .97 SQ 0 295.2 442.8 590.4 738 885 .6 • KK A2 BA 0.34 PB 11 PI .01 76 .0180 ,0187 .0190 .0198 .0202 .0211 .0215 .0225 .0230 PI .0240 .0245 .0257 .0263 .0276 .0282 .0297 .0304 .0320 .0328 PI .0346 .0356 .0376 ,0386 .0409 ,0421 .0447 .0461 .0491 .0507 PI .0542 .0561 .0577 .0582 .0594 .06 .Ol.'15 .0624 .0644 .0656 PI .06&4 .o?Ol .0741 .07 66 .0827 .0866 .0966 .1032 .1110 .1140 PI .1207 .1244 .1 326 .1371 .1475 .1533 .1591 .1646 .252 7 .3087 PI .4250 .5088 1.1349 1.9065 .6724 .3662 .1880 .1570 .1421 .1283 Pl.1172 .1082 .0912 .0794 .0720 .0669 .0634 .0607 ,0588 .0572 Puge 1 1E9"0N ~NIA3A ~ns ~ ~NI~33NI~N3 ~fl W~S0:01 _8661 '0E "J3G---- Collcxi.ihl Pl .0524 .0476 .04 34 .0398 .0365 .0337 .0312 .0289 .0269 .0251 PI .0235 .0220 .0207 .0194 .0183 .0173 0 0 0 0 LU 0.885 0.097 0 us 1.085 .42 KK scA2 KO 1 HC 3 • KK->sc.Al RS 2 STOR -I SV 0 34 .17 48.76 61.38 73.01 83.87 SQ 0 495 .6 743.4 991.2 12 39 1486 .S • KK Al BA 0.93 PB 11 Pl.0176 .0180 .0187 .0190 .0198 .0202 .0211 .0215 .0225 .0230 PI.0240 .0245 .0257 .0263 .0276 .0282 .0297 .0304 .0320 .0328 Pl .0346 .0356 .0376 .0386 .0409 .0421 .0447 .0461 .0491 .050 7 Pl .0542 .0561 .0577 .0582 .0594 .06 .0615 .0624 .0644 .0656 PI.0684 .0701 .0741 .0766 .0827 .0866 .0966 .1032 .1110 .1140 PI .1207 .1244 .1326 .1371 .1475 .1533 .1591 .1646 .252 7 .3087 Pl .4250 .5088 1.1349 l.9065 .6724 .3662 .1880 .1570 .1421 .1283 Pl .1172 .1082 .0912 .0794 .0720 .0669 .0634 .0607 .0588 .05 72 Pl.0524 .04 76 .0434 .0398 .0~65 .0337 .0312 .0289 .0269 .0251 Pl .0235 .0220 .0207 .0194 .0183 .0173 0 0 O 0 LU 0.885 0.097 O us 1.392 .42 • KKtoscAl RS 1 STOR ·l SY O 6.07 8.92 12.17 15.64 19 .2 SQ o 437 .2 655 .8 874 .4 1093 1311.6 • KK scAl HC 2 * KK ->A3 RS l STOR -I sv 0 8.12 10 .83 13 .39 15 .98 18 .55 SQ 0 810 1222.2 1629 .6 2037 2444 KK A3 BA 0.37 PB 11 Pl .0176 .0180 .0187 .0 190 .0198 .0202 .0211 .0215 .0225 .0230 Pl .0240 .0245 .0257 .0263 .0276 .0282 .0297 .0304 .0320 .0328 Pl .0346 .0356 .0376 .0386 .0409 .0421 .0447 .0461 .0491 .0507 Pl .0542 .0561 .0577 .0582 .0594 .06 .0615 .0624 .0644 .0656 PI .0684 .0701 .0741 .0766 .0827 .0866 .0966 .1032 .1110 .1140 Pl .1207 .1244 .1326 .1371 .1475 .1533 .1591 .1646 .2527 .3087 PI .4250 .5088 1.1349 1.9065 .6724 .3662 .1880 .1570 .1421 .1283 Pl.1172 .1082 .0912 .0794 .0720 .0669 .0634 .0607 .OS88 .0572 Pl .0524 .0476 ,0434 .0398 .0365 .0337 .0312 .0289 .0269 ,0251 PI .0235 .0220 .0207 .0194 .0183 .0173 0 0 0 0 LU 0.885 0.097 0 'US 0.929 .42 KKtoSCA3 RS I S'fOR -1 sv 0 2 .84 3 .99 s 5.98 7.28 SQ 0 225 .6 338.4 451.2 564 676 .S KK scA3 IiC 2 S'd Tr _________ ·c_9_·_o _N _________ :::iN_I_.J.._3_/\-=-._~n~:__ ~~~33NI::JN3 tlfl Wt:IS0: 0! _866 T '0::: 'J3G---- • KK ->B RS I STOR -1 SV 0 11.64 15 .82 19.82 23 .97 28 .12 SQ 0 97i.8 1459.2 1945.6 2432 2918.4 • • Flow Point 4 • KK B BA 0.30 PB 11 Collcxi.ihl PI.0176 .0180 .018 7 .0190 .0198 .0202 .0211 .0215 .0225 .0230 Pl.0240 .0245 .0257 .0263 .0276 .0282 .0297 .0304 .0320 .0328 Pl.0346 .0356 .0376 ,0386 .0409 .0421 .0447 .0461 .0491 .0507 PI.0542 .0561 .0577 .0582 .0594 .06 .0615 .0624 .0 644 .0656 PI .0684 .D701 .0741 .0766 .0827 .0866 .0966 .1032 .llJO .1140 PI .1207 .1244 .1326 .1371 .1475 .1533 .1591 .1646 .2527 .3087 PI .4250 .5088 1.1349 1.9065 .6724 .3G62 .1880 .1570 .1421 .1283 PI .1172 .1082 .0912 .0794 .0720 .0669 .0634 .0607 .0588 .0572 Pl.0524 .0476 .0434 .0398 .0365 .0337 .0312 .0289 .0269 .0251 PI .0235 .0220 .0207 .0194 .0183 .0173 0 0 0 0 LU 0.885 0.097 0 us 0.789 .42 KI< ·>B RS l STOR -1 sv 0 3 .89 5.54 7.4 9.47 11.79 SQ 0 202.8 304 .2 405 .6 507 608.4 * KK B HC 2 • KK ·>C RS l STOR -1 SY 0 20.4:3 28 .34 36.45 46.5 56 .18 SQ O 1097 .6 1646 .4 2195.2 2744 3292 .8 • Flow Point 5 • KK Cl BA 0.10 PB 1! Pl.0176 .0180 .0 187 .0190 .0198 .0202 .0211 .0215 .0225 .0230 PI .0240 .0245 .0257 .026 3 .0276 .0282 .0297 .0304 .0320 .0328 PI .0346 .0356 .0376 .0386 .0409 .0421 .0447 .0461 .0491 .0507 PI .0542 .0561 .0577 .0582 .0594 ,06 .0615 .0624 .0644 .0656 PI .0684 .D701 .0741 .0766 .0827 .0866 .0966 .1032 .1110 .1140 Pl.1207 .1244 .1326 .1371 .1475 .1533 .1591 .1646 .2527 .3087 PI .4250 .5088 1.1349 1.9065 .6724 .3662 .1880 .1570 .1421 .1283 Pl .1172 .1082 .0912 .0794 .0720 .0669 .0634 .0607 .0588 .0572 PJ .0524 .0476 .0434 .0398 .0365 .0337 .0312 .0289 .0269 .0251 Pl .0235 .0220 .0207 .0194 .0 183 .0173 0 0 0 0 LU 0.88~ 0.097 O us 0.216 .42 KK toC HC 2 • KK C2 BA 0.26 PB 11 Pl.0176 .0180 .0187 .0190 .0198 .0202 .0211 .0215 .0225 .0230 PI .0240 .0245 .0257 .0263 .0276 .0282 .0 297 .0304 .0320 .0328 PI .0346 .0356 .0376 .0386 .0409 .0421 .0447 .0461 .0491 .0507 Page 3 9'd Tr _________ •c_9_·_oN _________ ~N~I=.:_,J.,=-3 /\Clns '8 ~NICl33NI~N3 t:lfl Wt:l90: 0't _855 't '01:: ')3G---- Collexi.ihl Pl .0542 .0561 .0577 .0582 .0594 .06 .0615 .0624 .0644 .0656 PI.0684 .0701 .0741 .0766 .0827 .0866 .0966 ,1032 .lllO .1140 Pl .1207 .1244 .1326 .1371 .1475 .1533 .1591 .1646 .2527 .3081 PI .4250 _j088 1.1349 1.9065 .6724 .3662 .1880 .1570 .1421 .1283 PI.1172 .1082 .0912 .0794 .0720 .0669 .0634 .0607 .0588 .OS72 PI.0524 ,0476 .0434 .0398 .0365 .033 7 .0312 .0289 .0269 .0251 Pl .0235 .0220 ,0207 .0194 .0183 .0173 0 0 0 0 LU 0.88S 0.097 16 .27 us 0.581 .42 • KK ->C RS 1 sv 0 SQ 0 • KK c HC 2 KK D BA 0.98 PB 11 STOR 2.36 210 -1 3.S8 4.84 315 420 7.11 9.93 525 630 PI .0176 .0180 .0187 .0190 .0198 .0202 .0211 .021S .0225 .0230 PI .0240 ,0245 .0257 .0263 .0276 .0282 .0297 .0304 .0320 .0328 Pl.0346 .0356 .0316 .0386 .0409 .0421 .0447 .0461 .0491 .0507 PI.0542 .0561 .0517 .0582 ,0594 ,06 .0615 .0624 .0644 .0656 PI .0684 .0701 .0741 .0766 .0827 .0866 .0966 .1032 .1110 .1140 PI.1207 .1244 .1326 .1371 .!475 .1533 .l:i91 .1646 .2527 .3087 PI .4250 .5088 1.1349 1.9065 .6724 .3662 .1880 .1570 .1421 .1283 Pf .1172 .1082 .0912 .0794 .0720 .0669 .0634 .0607 .0588 .0572 PI .0524 .0476 .0434 .0398 .0365 .0337 .0312 .0289 .0269 .0251 PI .0235 .0220 .0207 .0194 .0183 .Ol 73 0 0 0 0 LU 0.885 0.097 3 us 1.4 .42 I<K toLC HC 2 KK LC RS 3 STOR -1 sv 0 178 .67 222 .45 26 1.69 300 .29 334 .58 SQ 0 1606.8 2410 .2 3213 .6 4017 4820.4 zz L'd 1E9'0N Pase4 Wtl90: 0! _8661 · 0::: · J3G---- * ID Crowley Tract ID College Station, Tcxu.s ID IT 15 09Scp98 0000 300 IO 5 * Ultilnute Conditions '" FlowPoim 1 KK A2B BA 0.08 PB 11 Collnlt.ihl PI.0176 ,0180 .018 7 .0190 .0198 .0202 .0211 .0215 .0225 .02:0 PI.0240 .0245 .0257 .0263 ,0276 .0282 .0297 .0304 .0320 .0323 Pl .0346 .0356 .0376 .0386 .0409 .0421 .0447 .0461 .0491 .050 7 Pl.0542 .0561 ,0577 .0582 .0594 .06 .0615 ,0624 .0644 .0656 PI.0684 .0701 ,0741 .0766 .0827 .0866 .0966 .1032 .1110 .1140 PI .1207 .1244 .1326 .137 1 .1475 .1533 .1591 .1646 .2527 .3087 Pl .4250 .5088 1.1349 1.9065 .6724 .3662 .1880 .1570 .1421 .1283 PI.1172 .1082 .0912 ,0794 .0720 .0669 .0634 .0607 .0588 .0572 PI .0524 .0476 .0434 .0398 .0365 .0337 .0312 .0289 .0269 .0251 PI .0235 ,0220 .o;1.07 .0194 .0183 .0173 0 O 0 0 LU 0.885 0.097 44.78 us 0.191 .42 * KK-:>scA2 RS 1 STOR ·l SY 0 2.56 3.43 4 .24 5.02 5.76 SQ o 82 .8 124.2 165.6 207 248.4 • • Flow Point 2 KK A2A BA 0.42 PB 11 PI.0176 .0180 .0187 .0190 ,0198 .0202 .0211 .0215 .0225 ,0230 PI.0240 .0245 .0257 .0263 .0276 ,0282 .0297 .0304 .0320 .0328 PI.0346 .0356 .0376 .0386 .0409 .0421 .0447 .0461 .0491 .0507 PI.0542 .0561 .0577 .0582 .0594 .06 .0615 .0624 .0644 .0656 Pl .0684 .0701 .0741 .0766 .0827 .0866 .0966 , 1032 .1 J!O .1140 Pl .1207 .1244 .1326 .1371 .la75 .1533 .1591 .1646 .2527 .3087 PI .4250 .5088 1.1349 1.9065 .672A .3662 .1880 .1570 .1421 .1283 PI.1172 .1082 .0912 .0794 .0720 .0669 .0634 .0607 .0588 .0572 PI .0524 .0476 .0434 .0398 .0365 .0337 .0312 ,0289 .0269 .0251 Pl .0235 .0220 .0207 .0194 .0183 .0173 0 0 0 0 LU 0.885 0.097 11.28 us 0.657 .42 KKtoscA2 RS 2 STOR ·l SV 0 13.34 18.13 22.55 26 .76 30.97 SQ 0 295 .2 442 .8 590.4 738 885 .6 KK A2 BA 0.34 PB 11 PI .0176 .0180 .0187 .0190 .0198 .0202 .0211 .0215 .0225 .0230 PI.0240 .0245 .0257 .0263 .0276 .0282 .0297 .0304 .0:20 .0328 Pl .0346 .0356 .0376 .0386 .0409 .0421 .0447 .0461 .041H ,0507 PI .0542 .0561 .0577 .0582 .0594 .06 .0615 .0624 .0644 .0656 PI .0684 .0701 .0741 .0766 .0827 .0866 .0966 .1032 .1110 .1140 PI.1207 ,1244 .1326 .1371 .1475 .1533 .1591 .1646 .252i .3087 PI .4250 .5088 1.1349 1.9065 .6724 .3662 .1880 .1570 1421 .1283 Pl.1172 .1082 .0912 .0794 .0720 .0669 .0634 .0607 .0588 ,0572 Page 1 8'd "CE9'0N ~NIA3 A ~ns ~ ~NI~33NI~N3 ~fl W~90 :0"C_866"C '0E 'J3G---- Collult.ihl PI.0524 .0476 .0434 .0398 .0365 .0337 .0312 .0289 .0269 .0251 PI .0235 .0220 .0207 .0194 .0183 ,01 i3 0 0 0 0 LU 0.885 0.097 44.32 US 0.58S .42 KK sOA2 KO 2 HC 3 • KK->soAl RS 2 STOR -1 sv 0 34.17 4&.76 61.38 73.01 83.87 SQ O 495.6 743.4 991.2 1239 1486 .8 • 'K.K Al BA 0 .93 PB 11 PI .0176 .0180 .0187 .0190 .0198 .0202 .0211 .0215 .0225 .0230 PI.0240 .0245 .0257 .0263 .0276 ,0282 .0291 .0304 .0320 .0328 PI .0346 .0356 .0376 .0386 .0409 .0421 .0447 .0461 .0491 .0507 PI .0542 .0561 .0577 .0582 .0594 .06 .0615 .0624 .0644 .0656 Pl .0684 .0701 ,0741 .0766 .0827 .0866 .0966 .1032 .1110 .1140 Pf .1207 .12A4 .1326 .13 71 .1475 .1533 .1591 .1646 .2527 .3087 PI.4250 .5088 J.1349 1.9065 .6724 .31562 .1880 .1570 .1421 .1283 PI.1172 .1082 .0912 .0794 .0720 .0669 .0634 .0607 .0588 .0572 PI .0524 .0476 .0434 .0398 .0365 .0337 .0312 .0289 .0269 .0251 J>I.0235 .0220 ,0207 .0194 .0183 .0173 0 0 0 0 LU 0.885 0.097 0 us l.392 ,42 • KKtoscAl RS I STOR -1 SY 0 6.07 8.92 12 .17 15.64 19 .2 SQ 0 437 .2 655 .B 874 .4 1093 1311.6 • KX scAl HC 2 KK ·>AJ RS 1 STOR ·l SY 0 8.12 10.83 13 .39 15 .98 18 .55 SQ O 814 .8 1222 .2 1629 .6 2037 2444 • KK A3 BA o.n PB 11 PI .0176 .0180 .0187 .0190 .0198 ,0202 .0211 .0215 .0225 .0230 PI .0240 .0245 .0257 .0263 .0276 .0282 ,0297 .0304 .0320 .0328 PI .0346 .0356 .0376 .0386 .0409 .0421 .0447 .046 l .0491 .0507 PI .0542 .0561 .0577 .0582 .0594 .06 .0615 .0624 .0644 .0656 Pl.0684 .0701 .0741 .0766 .0827 .0866 .0966 , 1032 .1110 .1140 PI .1207 .1244 .1326 .1371 .1475 .1533 .1591 ,1646 .2527 .3087 PI .42SO .5088 1.1349 1.9065 .6724 .3662 .1880 .1570 .1421 .1283 PI.1172 .1082 .0912 .0794 .0720 .0669 .0634 .0607 .0588 .0572 Pl.0524 ,0476 .0434 .0398 .0365 .0337 ,0312 .0289 .0269 .0251 PI .0235 .0220 .0207 .0194 .0183 .0173 0 0 0 0 LU 0.885 0.097 11.49 us 0 ,718 .42 * KKtoSCA3 RS 1 STOR -1 sv 0 2 .84 3 .99 5 5.98 7.28 SQ 0 225.6 338 .4 451.2 564 676.8 KI<. sc.'\3 HC 2 Page 2 6°d 1:::9·0N --------------------~N_I~,1,-=3~/\Cl=n:._S~'8~~NIC:l33NI~N3 t!Il Wt:IL0 : 01 8661 . 0E • J3a ___ _ • KK ->B RS I STOR -1 sv 0 11.64 15 .82 19 .82 23.97 28.12 SQ 0 972.8 1459 .2 1945 .6 2432 2918.4 • flowPoint4 KK B BA 0.30 PB 11 Collult.ihl PI .0176 .0180 .0187 .0190 .0198 .0202 .0211 .0215 .0225 .0230 PI.0240 .0245 .0257 .0263 .0276 .0282 .0297 .0304 .0320 .0328 PI .0346 .0356 .0376 .0386 .0409 .0421 .0447 .0461 .0491 .0507 l'l.0542 .0561 .0577 ,0582 .0594 ,06 .0615 .0624 .0644 .0656 PI .0684 .0701 .0741 .0766 .0827 .0866 .0966 .10.32 .1110 .1140 PI .1207 .1244 .13:2.6 .1371 .14n .1533 .1591 .1646 .2527 .3087 PI .4250 .5088 l.1349 1.9065 .6724 .3662 .1880 .1570 .1421 .1283 PI.1172 .1082 .0912 .0794 .0720 .0669 .0634 .0607 .0588 .0572 Pl .0524 .0476 ,0434 .0396 .0365 .0337 .0312 .0289 .0269 .0251 PI .0235 .0220 .0207 .0194 .0183 .0173 0 0 0 0 LU 0.885 0.097 50,4.7 us 0.463 .42 • KK ->B RS 1 STOR ·l SV 0 3.89 5.54 7.4 9.47 I 1.79 SQ 0 202.S 304.2 405.6 507 608.4 • KK B HC 2 I<K ·>C RS l STOR ·l sv 0 20.43 28 .34 36.45 46 .5 515 .18 SQ 0 1097 .6 1646 .4 2195 .2 2744 3292.8 • Flow Polnt5 • KK Cl BA 0.10 PB 11 PI.0176 .0180 .0187 .0190 .0198 .0202 ,0211 .0215 .0225 .0230 PI.0240 .0245 .0257 .0263 .0276 .0282 .0297 .0304 .0320 .0328 Pl.0346 .0356 .0:16 .0386 .0409 .0421 .0447 .0461 .0491 .0507 PI .0542 .0561 .0577 .0582 .0594 ,06 .0615 .0624 .0644 .0656 PI.0684 .o?Ol .0741 .0766 .0827 .0866 .0966 .1032 .1110 .1140 PI.1207 .1244 ,1326 .1371 .1475 .1533 .1591 .1646 .2527 .3087 Pl.4250 .5088 1.1349 1.9065 .6724 .3662 .1880 .1570 .1421 .1283 Pl.1172 .1082 .0912 .0794 .0720 .0669 .0634 .0607 .0588 .0572 PI .0524 .0416 .0434 .0398 .0365 .0337 .0312 .0289 .0269 .0251 PI.0235 .0220 .0207 .0194 .0183 .0173 0 0 O 0 LU 0.885 0.097 74.77 us 0.117 .42 KK toC I-IC 2 KK C2 BA 0.26 PB 11 Pl.0176 Pl .0240 Pl .0346 .0180 .0245 .0356 .0187 .0257 .0376 .0190 .0263 .0386 .0198 .0202 .0211 .0215 .0225 .0276 .0282 .0297 .0;04 .ono .0409 .0421 .0447 .0461 .0491 .0230 .0328 .050i Page 3 1E9'0N ~NI~3 A ~ns ~ ~NI~33NI~N3 ~fl W~L0 :01 .. 8661 '0E 'J3G_ ·-·- Collult.ihl PI.0542 .0561 .0577 .OS82 .0594 .06 ,061S .0624 .0644 .0656 PI .0684 .0701 .0741 .0766 .0827 .0866 .0966 .1032 .1110 .1140 PI.1207 .1244 .1326 .1371 .1475 .1533 .1591 .1646 .2527 .3087 PI .4250 .5088 l.1349 1.9065 .6724 .3662 .1880 .1570 .1421 .12g3 PI.1172 .1082 .0912 .0794 .0720 .0669 .0634 .0607 .0588 .0572 Pl .0524 .0476 .0434 .0398 .0365 .0337 .0312 .0289 .0269 .0251 PI .0235 .0220 .0207 .0194 .0183 .0173 0 0 0 O LU 0.885 0.097 27 .05 us 0.518 ,42 • I<K ->C RS 1 sv 0 SQ 0 • KK c HC 2 • KK D BA 0.98 PB ll STOR 2.36 210 -1 3.58 4 .84 315 420 7.11 9 .93 525 630 PI .0176 .0180 .0187 .0190 .0198 .0202 .0211 .0215 .0225 .0230 PI.0240 .0245 .0257 .0263 .0276 .0282 .0297 .0304 .0320 .0328 PI.0346 .0356 .0376 .0386 .0409 .0421 .0447 .0461 .0491 .0507 Pl ,0542 .0561 .0577 .0582 .0594 .06 .06l5 .0624 .0644 .0656 l'l.0684 .0701 .0741 .0766 .0827 .0866 .0966 .1 032 .1110 .1140 PI.1207 .1244 .1326 .1371 .1475 .1533 .1591 .1646 .2527 .3087 PI .4250 .5088 J .1349 1.9065 .6724 .3662 .1880 .1570 .1421 .128 3 PI.1172 .1082 .0912 .0794 .0720 .0669 .0634 .0607 .0588 .0572 Pl .0524 .0476 .0434 .0398 .0365 .033 7 .0312 .0289 .0269 .0251 PI .0235 .0220 .0207 .0194 .0183 .0173 O 0 0 0 LU 0.885' 0 .097 3 us 1.4 .42 • KK 10LC HC 2 I<K LC RS 3 STOR -1 SV 0 178 .67 222 .45 261 .69 300.29 334.5! SQ 0 1606 .S 2410.2 3213 .6 4017 4820.4 • zz H'd "CC:9'0N Pnge4 ~NIA3A ~ns ~ ~NI~33NI~N3 ~fl W~l0:0"C 866"C'0C:'J3G ---- "' CHAPTE R 6 . Un it Hydrograph Methods \ R • the bash1 storage factor iii hours. ---· .f;UNCR the 1 mtt hydragraph ordinate at the end of the -.computation interra! The camputauoii of t.mu llyfifegre:ph ordinates is terminated- ~ea the nuioffv.olume exce8Els 0.9~5 tt1cn (mm) or 150 oaJ.inates art1 ~omputed whichever occurs first. The HEC-1 US record is used to enter the data required to compute a unit hydrograph using the Snyder method. Snyder (1938) proposed two equations to be used in constructing synthetic unit hydrographs. The first equation defines the lag time of the watershed. or the Ume from the centroid of rainfall excess to the peak of the unit hydrograph. TL = Ct(L X Lca)0.3 in which: TL= watershed lag in hours L = the length of the watershed along the main channel from the point of reference to the upstream boundary of the watershed. in miles Len = the distance along the main channel from the point of reference to a point opposite the centroid of the watershed, in miles ' Cr = a coefficient representing variations in watershed slopes and storage The second equation gives the peak discharge of the unit hydrograph. in which: qP =peak discharge in cubic feet per second per square mile T&. =watershed lag in hours CP = a coefficient accounting for flood wave and storage conditions. The Snyder method determines the unit graph peak discharge, time to peak, and widths of the unit graph at 50% and 75% of the peak discharge. Figure 6 .8 illustrates these aspects of the Snyd r unit hydrograph method. Page 6-i l Snyder Unit Hydrograph Computation 6 .10 6.11 ., Hands-on HEC-1 Copyright C Dodson & Associates . Inc . All Rights Reserved . '-November 1993 Page 6-12 FIGURE 6.8 Sriyder Unit Hydrograph Method 6.12 6.13 November 1993 CHAPTER 6 . Un it Hydrogroph Methods The Snyder method does not produce the complete unit hydrograph required by HEC-1. Thus. the program u8es_ the Clark method to effect a Snyder unit hydrograph. The initial Clark parameters are estimated from the given Snyder parameters.· TL and CP . A unit hydrograph is computed using Clark method. Snyder parameters are computed from the · resulting unit hydrograph by the following equations: CP -Q TP£AK -0.5at TMP-MAX CxA ALAG = l .. 048(T.PF.AK -0. 75at) in which: CP 7JlP = Snyder's -CP for the computed unit hydrograph . . , . ., Qw.x = the maximum ordinate of the unit hydrograph · TPEAK = the 'time when Qw.x occurs, in hours .t..t = the duration of excess. in hours A = the sub-~asin area. in square ~es (sq ~l C = a conversion factor for units of measurement ALAG = Snyder's standard lag, TL . for the computed unit hydrograph. I .. Snyder's standard lag is for a unit hydrograph which has a duration of excess equal to TL/5. The coefficient 1.048 in equation 6.13 results from converting the duration of excess to the given time interval. Copyright C Dodson & Associates. Inc. All Rights Reserved . Ho,ndS-On HEC-1 / 'I CHAPTER 6 . Un it Hyd rograph Methods Clark TC and Rare adjusted to compensate for differences between values of TL and cp calculated by equations 6.12 and 6 .13 and the given values. A new unit hydrograph is computed using these adjusted values. This procedure continues through 20 iterations or until the differences between computed and given values of TL and CP are less than one percent of the given values. Many methods have been developed for estimating the parameters for the unit hydrograph methods available in HEC-1 . These methods are generally based on studies of actual watersheds. The Snyder unit hydrograph has been perhaps the most widely studied unit hydrograph method. Several methods have been developed for estimating values of the Snyder's lag and peaking coefficient. This section describes the following methods: 1. The Tulsa District Method 2 . The Denver Method 3 . The Espey Method 4 . The Espey "10-Minute" Method 5 . The Riverside County Method 6 . The Eagleson Method 7 . The Putnam Method 8 . The Taylor and Schwartz Method 9. The Colorado State University (CSU) Method The Tulsa District of the U.S . Army Corps of Engineers has developed the following equation for Snyder's watershed lag for natural watersheds in rural areas of central and northeastern Oklahoma. in which: TL = watershed lag in hours L = watershed length in miles L00= length to centroid in miles S = watershed slope in fee t per mile. The range of hydrologic characteriStics of the watersheds studied in developing this equation are as follows: Watershed Area: From 0 .88 sq. mi. to 502 sq. mi. Watershed Slope: From 4 .1 feet per mile to 82.1 feet per mile Watershed Length: From 1.4 miles to 60.5 miles Length to Centroid: From 0 .6 miles to 33.0 miles ESTIMATING UNIT HYDROGRAPH PARAMETERS Page 6-13 Estimating Snyder Unit Hydrograph Parameters Tulsa District Method for Estimating Snyder Parameters 6.14 Hands-On HEC -1 Copyright~ Dodson &. Associates. Inc. All .Rights Reserved . November 1993 Page 6-14 6 .15 6 .16 6 .17 6 .18 Denver Method for Estimating Snyder Parameters 6 .19 November 1993 C HAPTER 6 . Unit Hyd rogroph Methods For urban areas. the Tulsa District developed two equations. The equation for areas which are 50% urbanized is: 11 = 0. 92( L Tsca r39 The equation for areas which are 100% urbanized is: 11 = 0. 5~( L Tsca r39 Both of these equations are based on an assumed 50% impervious cover in urbanized areas . The range of hydrologic characteristics of the watersheds studied in developing these equations are as follows: Watershed Area: From 0.47 sq. mi. to 108 sq. mi. Watershed Slope: From 10.3 feet p er mile to 62.7 feet p e r mile Watershed Length: From 1.45 miles to 25.8 miles Length to Centroid: From 0.7 miles to 10.0 miles Urban Development: From 30% to 100% These equations are not considered valid for very large basins or for small basins with areas of less than 1 /3 to 1 /2 square mile. The Tulsa District of the U.S. Army Corps of Engineers also developed the following relationship for peak unit hydrograph flow rate (in cf s per square mile) to complement the watershed lag equations presented above: qp = 38011--0.92 Using the peak flow rate and watershed lag computed with the equations developed by the Tulsa District, the peaking coefficient CP for the watershed may be detenniiled using the folloWing version of Snyder's relationship for the peak unit hydrograph flow rate: C -Qp xTL -p -640 The following equation has been developed by the Denver Area Urban Drainage and Flood Control District (Wright-McLaughlin Engineers. 1975) to estimate the watershed lag TL: TL= er( L J§rn r48 in which: ·•. Tr., = time to peak of unit hydrograph from midpoint of unit rainfall in hours, e.g .• the lag time. L = length along the stream from the study point to the upstream limits of the basin in miles. Lai = length along the su;-eam from study point to a point along the stream adjacent to centroid of the basin in miles. Copyright C Dodson & Associates , Inc. All Rights Reserved . Hands-On HEC -1 CHAPTER 6 . Unit Hydrograph Methods .. S = weighted average slope of the basin along the stream to the upstream limits of the basin in feet per foot. C, = coefficient reflecting time io peak. The range of hydrologic characteristics of the watersheds studied in developing these equations was as follows: Watershed Area: From 0.15 ~q. m f to 3.08 sq. mi. Watershed Slope : From 0.005 feet per foot to 0.037 feet per foot For natural channels or grass channels without checks. a correction to the basin slope used in computing lag is recomme°'ded. The relationship between measured slope and reconunended slope is illustrated on Figure 6.9. 0.1£> o.oe 0 .06 Corrected {Recommended) Slope (tt ./rt .) 0 .04 O.Q2 0.0 v 0 .0 r '. -. ' --;:: .....-__..-hunl<" hCJry)e is or I/ v Gaser µTIOOI \NlthO JIQ-e ::1cs / v ' I / ,. .. -' 0.02 o.oc · o.06 o .oe 0 .10 , Mecand Weigtt~ Clarage'llllay' Slope (tt ./rt .) The value of Ct for use .tn _the -Colorado Urban Hydrograph Procedure may be determined using the following equations. which relate C1 to the percentage:of impervious cover I,.. Ct= -0.00371Ia +0.163 0~Ia~10 Cr= 0 .000023I~ -0.00224Ia +0.146 10 ~Ia< 40 ct= 0.0000033I~ -0.000801Ia +0.120 40<Ia~100 These relationships are also illustrated on Figure 6 .10 . 0.12 Page 6-1 5 FIGURE 6.9 Relationship of Measured Slope to Recommended Slope 6 .20 6.21 6 .22 Hands-On HEC-1 CoPYrighfC Dodson&. As5ociates . Inc . All Rights Reserved . · r: November 1993 Pa ge 6-16 FIGURE 6.10 Relationship of Time to Peak TP to Percent Impervious Cover /0 6 .23 6 .24 6 .25 CHAPTER 6 . Unit Hy dro graph Methods 0 .18 0 .16 \ \ \ 0 .14 Coeffic ient Ct ~ \ 0 12 ""-~ ......... 0 .10 .... ~ ............ -------0.08 0.06 0 20 40 60 80 100 Percent Impervious In order to detennine the peaking coefficient C, using the Colorado Unit Hydrograph Procedure. a peaking coefficient Pis computed using the following relationships . which are illustrated in Figure 6 .11. P =0.002450;;-0.01201 .. +2.16 P =~.0009H~ +0.228Ia -2.06 0 ~Ia~ 40 40<Ia~100 In these equations, I 0 ts the percentage of impervious cover in the watershed. Using the computed value of P and the value of C1 determined as described earlier, the value of CP is computed using the following equation: C -Pxl"' xAOJS p -'-'t in which: cl = coeflkient P = peaking parameter A = basin area in square miles. November 1993 Copyright~ Dodson&. Associates. Inc. All Rights Reserved . Hands-On HEC· 1 CHAPTER 6 . Un it Hydrograph Meth ods 12 . / 0 8 Peaking Para me ter 6 4 2 - / ~ v 0 20 / / / / .. / v v · /" I/ J I : 40 60 80 100 Percent I~ Espey ( 1966) developed a series of equations for defining unit hydrographs for small watersheds in Texas. Oklahoma and New Mexico. One of the unit hydrograph parameters used by Espey was the time to rise, or the time from the beginning of eff ecttve rainfall to the time at which the peak flow rate in th,e unit hydrograph occurs. The equations for time of rise developed for rural and urban areas are as follows: Tr= 2. 65L~J 2 SJ°.52 (Rural Areas) Tr= 20.BU L~.2 9 SJ°J 1 1-o .si (Urban Areas) in which: Tr = time from beginning of effective rainfall to peak of unit hydrograph (minutes) L1 = stream length (feet) s1 = stream slope (feet per foot) I = percent impervious cover U = factor equal to 0.6 for extensive urban development, 0.8 for some storm sewers and channelization, and 1.0 for natural conditions Page b-1 7 FIGURE 6.11 Relationship of Peaking Parameter to Percent Impervious Cover /0 Espey Method for Estimating Snyder Parameters ·& 6.26 6.27 Hands-On HEC-1 Copyright C Dodson & Associates. Inc. All Rights Reserved . November 1993 Page 6-18 . . . .. 6 .28 6 .'E November 1993 CHAPTER 6 . Unit -Hydrograph Methods Characteristics of the study watersheds used to derive the equations for rural areas were: 4 From 3,250 feet to 25,300 feet Sj From 0.008 ft. per ft. to 0.015 ft. per ft. T,:. From 30 minutes to 150 minutes . . Area: From 0.134 square miles to 7 .01 square miles I The characteristics of the watersheds used to develop the equations for urban areas were: Lj From 200 feet to 54,800 feet Sj From 0.0064 ft. per ft. to 0.0104 ft. per ft. I: From 25% to 40% T,:. From 30 minutes to 720 minutes Area: From 0.0128 square miles to 92 square miles Note that the time to rise Tr is not the same as the watershed lag time TL' The difference between the two is that Tr is defined as the time from the beginning of effective rainfall to the peak of the unit hydrograph, while TL is the time from the centroid of the effective rainfall to the peak of the unit hydrograph. For the purposes of HEC-1 analyses. however. TL may be determined simply by subtracting one-half the computation time interval from the computed value of T,.. Espey also developed equations for the peak unit hydrograph flow rate. These equations are: · q~ = l 700A-<>.I 2 Tr--0.30 )Rural Areas) , q ~ l 9300A --0.09T.--0.94 lU. rban Areas) •. p r in which: . . '" " qP = unit hydrograph peak flow rate (cubic feet per second per square mile)---.· -· -~ -~:-· -_,_ ---- A= ~e _area (square miles) T, = time from beginning of effective rainfall to unit hydrograph peak (minutes) · Characteristics of the study watersheds used to derive the equations for rural areas are as follows: , ... A : From 0.134 square miles to 7.01 square miles T,: From 30 minutes to 150 minutes The characteristics of the watersheds used to develop the equations for urban areas are: A: From 0.0 ~28 square miles to 9.2 square miles. T,: From 30 minutes to 720 minutes · Copyright C Dodson & Associates. Inc. All Rights Reserved . Hands-On HEC-1 CHAPTER 6 . Un it Hydrograph Methods The peak unit hydrograph flow rate thus determined may be used along with Espey's time of rise (discussed earlier) to compute the value of Snyder's peaking coefficient CP for use in HEC-1 analyses. First. the watershed lag time TL is determined by subtracting one-half of the computation inteival from the time to rise (TL= T, -M/2). Then. CP may be computed by substituting the known values of TL and qP into Snyder's equatio~ for peak unit hydrograph flow rate and solving for cp. C = qp x TL p 640 In another study. Espey (1977] derived the following equation for computing the time from the beginning of surface runoff to the unit hydrograph peak: T = 3.1OLo.23 5 --0 .2s1--0.1s<I>1.s1 r in which: T, = time from beginning of surface runoff to unit hydrograph peak (minutes) L = total distance along main channel from study point to watershed boundary (feet) S = main channel slope between the reference point and a point 0.2L downstream from the upstream watershed boundary (feet per foot) I = impervious cover within the watershed (percent) <I> = description of conveyance efficiency of the watershed drainage system. The conveyance efficiency coefficient <I> is Cletermined using the relationships illustrated on Figure 6.12. 1.m • 1.10 0.01 O.o6 om om 0.11 o.u 0.15 0.17 Weig\led Moi'I Chcrnel Mari-lg ·n· vau. This equation was derived from records for 41 watersheds in Texas. Tennessee, Mississippi. Pennsylvania, North Carolina, Colorado. Kentucky. and Indiana. The range in., the watersp~d characteristics used to develop the equations for urban areas were: Page 6-19 6 .30 Espey • 10-Minute • Method for Estimating Snyder Parameters 6 .31 FIGURE 6.12 Determination of Conveyance Efficiency Coefficient 4> ·• Hands-On HEC-1 Copyright e Dodson&. Associates. Inc. All Rights Reseived . · -November 1993 Page 6-20 6 .32 Riverside County Method for Estimating Snyder Parameters 6 .33 6.34 6 .35 November 1993 CHAPTER 6 . Unit Hydrograph Methods Area: From 0.0128 square miles to 15.00 square miles L: From 555 feet to 35,600 feet S: From 0.0005 ft. per ft. to 0 .0295 ft . per ft. I: From 2% to 100% <l> : From 0.60 to 1.30 Again . note that the time to rise T, is not the same as the watershed lag time TP . The difference between the two is that T , is defmed as the time from the beginning of effective rainfall to the peak of the unit hydrograph. while TL is the time from the centroid of the effective rainfall to the peak of the unit hydrograph. For the purposes of HEC-1 analyses. however. TL may be determined simply by subtracting one-half the computation time interval from the computed value of T , (TR - M/2). The relationship developed by Espey to compute the peak flow rate of the unit hydrograph is as follows: Q = 31600A0 ·96r:1.0 7 u r in which: Qu =unit hydrograph peak discharge (cfs) A = drainage area (square miles) T, = time of rise from beg1nn1ng of surface runoff to unit hydrograph peak (minutes) Three watershed lag equations have been derived for use in rural areas of Riverside County. California by the Riverside County Flood Control and Water Conservation District (Anonymous, 1963). These equations differ slightly from those developed at the Tulsa District of the U.S. Army Corps of Engineers in that lag is defined as the time from the beginning of rainfall to the point on the unit hydrograph corresponding to one-half of the total runoff volume. Each equation is applicable to a c:liff erent topographic region: TL = 1. 20( L Tsrn r38 ( ) 0 .38 TL =0.72 L~ ( ) 0.38 TL= 0 .38 L~ca in which: TL = watershed lag in hours L = watershed length in miles Lea = length to centroid in miles Copyright~ Dodson & Associates . Inc. All Rights Reserved . (Mountain Areas) ., (Foothill Areas) (Valley Areas) Hands-On HEC-1 C HAPTER 6 . Un it Hydrogroph Methods S = watershed slope in feet per mile. The sizes of the watersheds studied in developing these equations ranged from 2.3 square miles to 645 square miles. Eagleson (1962) developed an equation for watershed lag in ·fully storm-sewered basins. ' · TL = 0. 32( L :fsca r.39 in which: TL = watershed lag in hours L = watershed length in miles Lea = length to centroid in miles S = weighted slope of storm sewers in feet per mile. The characteristics of the watersheds studied by Eagleson in developing this equation are as follows: Watershed Area: From 0.22 square miles to 7.51 square miles Watershed Length: From 0.93 miles to 6.48 miles Length to Centroid: From 0.31 miles to 2.68 miles Storm Sewer Slope: From 6.34 feet per mile to 20.06 feet per mile Impervious Cover: From 33% to 83% A watershed lag equation for urban areas has been developed by Putnam (1972). The form of this equation, which has been verified for watersheds in and around Wichita. Kansas by the United States Geological Survey. is as follows: T, ~0.49Hr1;;"' 'I in which: TL = watershed lag in hours L = watershed length in miles S = watershed slope in feet per mile la= impervious cover. expressed as a fraction. The range of characteristics of the watersheds studied by Putnam in developing this equation are: ' · Watershed Area: From 0.3 square miles to 150 square miles Ratio IL/../SJ : From 0 .1 to ·9.0 Impervious Cover: From 0.0 to 0.3 Taylor and Schwartz ( 1952) developed the following relationship for the coefficient Cr from an analysis of 20 watersheds in the North and Middle Atlantic states. Page 6-21 Eagleson Method for Estimating Snyder Parameters 6 .36 Putnam Method for Estimating Snyder Parameters 6.37 ., Taylor and Schwartz Method for Estimating Snyder Parameters Hands-On HEC· 1 Copyrigtlt C Dodson & As5odotes. Inc . All Rights Reserved . . . November 1993 Page 6-22 ·6 .38 6.39 Colorado State University Method for Estimating Snyder Parameters 6 .4) 6 .41 November 1993 CHAPTER 6 . Unit Hydrograph Methods in which: r _ 0.6 '-'t -rs C1 = coefficient representing variations in watershed topography S = watershed slope (feet per foot) This coefficient may be used in Snyder's watershed lag equation to compute the value of ~ for a given watershed: 11 =Ct (L x Lea )°"3 in which: Ti = watershed lag in hours C1 = coefficient representing variations in watershed topography L = watershed length in miles Lea = length to centroid in miles Another equation for determining the value of the coefficient C1 was developed at Colorado State University (1974). This equation is of the following form: in which: r _ 7.81 '-'t -~.78 a C1 = coefficient representing variations in watershed topography IQ = percentage of impervious ~over in the watershed This relationship was developed for watersheds in the Denver area. It is not valid for values of IQ less than 10 percent. Figure 6 .13 illustrates the relationship between cl and Imperviousness. This coefficient may be used in Snyder's watershed lag equation to compute the value of TL for a 8iven watershed: 11 = Ct(L x Lca)o.s in which: TL = watershed lag in hours C1 = coefficient representing variations in watershed topography L = watershed length in miles ., Lea= length to centroid in miles Figure 6.14 illustrates the relationship between CP and C1• Copyright C Dodson & Associates. Inc. All Rights Reserved . Hands-On HEC-1 CHAPTER 6 . Unit Hydrograph Methods 3.0 ..---..,...---r---.---,...._;_;,--,----,----,.----;;---,..---, l .5 ~-+---+---+---l---+--+--+--1r---t----i 20 ~--+---+---4---+----+---+--+----ir---t---; 1 !~-+---+---+---l---+--+--+--1r---t----i 1.0 ~-4-"'~--4----1--1---t--+--+---+---t---i "'~ o.5 111M===f=+=l~=D 10 20 30 70 eo 90 100 1.2 1.1 --,,..,..,... 1.0 ~ V" 0.9 --v-- o.e / ,,,,.,,. r . 0.7 ./ v 0.5 v v .. 0.A 0.3 v ... I ·*'"', 0.2 0.1 I -- - 0 o 0.1 0.2 0.3 o.• . u D.6 0.1 . a.a o.9 1.0 1.1 1.2 1.3 u 1.5 c, The Clark method ( 1945) requires three parameters to calculate a unit hydrograph: tc. the time of concentration for the basin, R. a watershed storage coefficient, and a time-area curve. As described earlier in this chapter, a time-area cu:rVe defines the cumulative area of the watershed contrtbuttng runoff to the sub- basin outlet as a function of the time (expressed as a proportion oft). There are several documented methods for computing the Clark tc' including: 1. The Hydraulic Analysis Method ; 4' 2. The Kerby Method for Overland Flow 3 . The Kirpich Method for Overland Flow Page 6-2 3 FIGURE 6.13 Graph for Determining Topographic Coefficient FIGURE 6. 14 Graph for Determining Peaking Coefficient Estimating Clark Unit Hydrograph Parameters ., Hands-On HEC-1 ·Copyright C Dodson & Associates. Inc. All Rights Reserv~. November 1993 I Thi31..E g U12PK*oRAZt.JSCO D .. I ', . . ,:.\" c 3 SEP d7 -lO:oz:45 ======================================== BRAZOS COUNTY * LIMITED D~TAILED STUDY * SEP l9d7 s Kr Pa PT 1 o ,~ -1 -z. -3 ***~**~***************~*************~=****~***~******************** OPTION l TITLEu DATA 8~AZOS COUNTY * LIMITED DETAILED STUDY * LICK CKEtK * SEP 1987 ENDOPTION 1 ******************************************************************* OPTION 2 T!TLEO DATA 3~AlOS COUNTY * LlMITED DETAILED S TUDY * ~ICK S O ~ CREE~ * S E? 1 987 ENCOPTION *****~***************************************~*~*****~********** OPTION 3 TITLED DATA BKAZOS CO~NTY * LlMITcD D~TAILED STUDY * CAkTcRS CREE~ * SEP 19d7 E i'IOOPT IuN ****************************************************'~************* DATA i<.UUTE PRINTOUT 8 8 8 8 8 8 3 8 8 CuMSINE PKINTOUT a s a 8 a 8 3 a 8 LLlCAL PRINTOUT 8 8 8 8 8 8 3 8 8 100 YEAR KAlNFALL 3.52 4.51 5.60 b.2.7 7.80 9.50 11.00 HY0~0-35 ~AlNFALl 1.15 2.18 1.95 4.25 UHG DATA Ii1PERVIOU~NES.) P E RC E i>i T S AN 0 DEBUG wRITE-UP = ON POINT DISCHARGE DISPLAY = ON UHG DATA uISPLAY = GN COMPUTEu PROBABILITY UISP~AY = ON MUDIFIEO uHG uISPLAY = ON NO PRINTOUT OPTION l LUC 1 -LlCK CREEK HEAO~ATEi<:.S ABOVE rhiY 6 1.02 2.10 1.13 21.&5 20 io 90 DlSPLAY POI NT DISCAkO LOC 2 -LlC K CREEK AduVc TR IB LC-l 1.72 3.10 1.59 22.84 10 5 90 DISPL AY PULH LJC 3 -T~I3 LC-1 A6 0 VE LlCK CREEK 1.53 2.04 1.43 18.18 20 lv ~o PkINT l.i UT TITLEJ CONFLUENCE l CuN T'0 l iMZPK*oRAZOSl.O ?AGt 2 3 SEP d7 -lO:OL:45 ======================================== LlCK CREEK ~ELD~ TRIB LC-l NlJ PRINTOUT DISCAKD LOC 4 -LICK CREE~ ABOVE ~PRING C~EEK 4.43 4.94 3.2~ 18.ll 5 2 9 0 DISPLAY PLJINT LDC 5 -SPRING CREEK ABUV~ ~ICK CK EEK 3.74 5.35 3.0o 15.46 ~5 7 90 PRINTOUT TITLED CO~FLUENCE LICK CREEK dELO~ SPRING C ~EEK Nu PRlNTOUT DISCARD LUC b -LlC~ CREEK A5LlVE ALUM CREEK 10.05 7.2j 4.~7 13.d3 5 2 9 0 DISPLAY PuINT LUC 7 -ALUM CRtE~ A&JVE TRIB AC-L 0.19 o.75 o.3d ;3.57 0 u 90 DISPLAY PuINT L~C 8 -TKio AC-2 ABO~E ALUM CREEK 0.11 o.66 o.36 40.82 o o ~o PRINTOUT TITLED CONFLUENCE ALUM CREEK ~ELOw TRIB AC-L NO PRINTOUT DISCAt\D LlJC 9 -ALUM CREEK ABOVE TRIB AC-3 o.ao i.J5 0.11 21.12 u o ~o DISPLAY PUINT LUC lu -TRio AC-~ A6 uV~ ALJM CR EEK 0.96 l.92 l.Oo 36.81 10 5 90 PkINTuUT TI TL Eu co1~FLUt:NCE ALUM CREEK aELO~ TRia AC-3 ,'JU PRINTOUT DISCAK.D LDC 11 -ALUM CKE~K A60VE TRI~ AC-4 2.61 3.26 2.14 L5.41 LO 10 90 DISPLAY PuI1'iT DISCARD LOC 12 -ALUM CkEEK AGOVE TRio AC-1 3.08 3.64 2.3o L2.71 15 7 90 DISPLAY PGINT LJC 13 -TRIB AC-1 A~OVE fRIB AC-lA 0.14 u.73 0.4; 83.33 15 7 90 DISPLAY POINT LuC 14 -TRid AC-lA A~OVE TkI3 AC-1 0.13 c.o3 0.39 76.59 15 7 90 PRINTGUT TITLEU CONFLUENCE , (CJ NT'D l 1M2PK '~8RAZOSCO PAGc 3 3 SEP a7 -10:0~:45 ======================================== TRid AC-1 8ELuh TKI8 AC-lA NO PRINTOUT DISCAkD LDC 15 -TRIB AC-1 ABOVE LDC 16 o.54 1.04 o.64 48.71 10 5 90 DISPLAY PUINT DISCAKD LOC 16 -TRIB AL-l A8UVE ALJM CREEK o.92 l.96 l.lo 36.73 7 3 ~o PRINTOUT TITLEJ co~FLUiNCE ALUM CREEK oELOw TKlB AC-~ NO PRINTOUT DISCAK.D LOC 17 -MLJM CKEEK AbOVE LICK CREEK 4.40 4.97 3.30 16.40 10 5 90 Pt<.INTOUT TITLED CO~FLUENCE LICK CREEK tiELOrl ALUM CREiK NO PRINTOuT DISCARD LDC 18 -~!CK CKEEK BELOW TRici LC-2 lb.50 8.22 4.72 12.60 5 3 90 DISPLAY PUi iH DISCAKD LDC 19 -Ll~K CR.EEK Bt:LOw ROAu "A" 18.28 9.67 4.o9 11.31 o o 90 DISPLAY PUi rH DISCARD LuC 2U -LIC K CREEK ~bOVE NAVASUTM RI VEK 20.;7 12.u3 6.65 ~.b4 o o 90 DISPLAY Pu I iH Ei'lOGPTION OPTIO N 2. LDC 1 -WICKSLiN CKEEK HEAU~ATERS ABOV~ ~ILC~X LMNE 16.70 e.3o 4.39 9.97 u o ~o DISPLAY PuINT DISCAt<D LJC 2 -~lCKSuN CKEEK AtiOVE T~lb ~c-1 l~.84 lJ.~4 5.85 o.~9 o o 90 DISPLAY POINT LDC 3 -Tklb hC-1 AoOVE ~1CKSuN CREEK 1.41 2.52 1.67 25.93 0 0 90 Pt.UNTOUT TI TL E 0 C 0 1~ FLUE NC E WICKSUN C~EEK BELuW TKid nC-1 NlJ PR.1.NTOJT DISCAKD LDC 4 -~lC~SuN C~EEK A~O~E LITTLE ~ICKSO~ CREEK 21.73 11.~7 5.73 6.37 0 0 90 T~BLE ~ (CuNT'fJl lMZPK*oK.AZOSCO P AG i: 3 Sc? o7 -~O:OL:4~ ======================================== D I S P LAY P U I iH PRINTOUT LJC 5 -L1TTLE ... ICK~Oi~ CREEr<. hEAOhATEr<.S 1.72 l.d3 o.a4 t9.l9 u o ~o DISPLAY Pi.iINT DISCARD LJC 6 -LITTLE ~ICKSON CREEr<. ~BOVE TRIB LwC-1 2.28 2.91 1.50 21.50 U 0 ~O DISPLAY P i.i I i'j T LDC 7 -Tkib L~C-i ABUVt LITTLE ~ICr<.SuN CKEcK o.34 1.12 o.6~ 36.90 u o ~o PRINTUUT TITLED CO~FLUcNCE LITTLE ~rcKiON CR~EK bELO~ TRIB L~C-1 NlJ PRINTOUT DISCA;{D Li.iC 8 -LITTL~ ~ICKSO~ CR~Er<. AaOVE TRia LAC-2 3.14 3.72 1.7~ 20.07 u 0 90 DISPLAY PUI1H LGC 9 -TkI~ L~~-~ ABUYE LrTTLE ~lCKSUN C~EEK 3.04 3.o7 2.ou 17.45 15 7 9u PRINTOUT TITLEJ CONF~UENLE LITTLE ~ICKSO~ CREEK BELO~ TRIB LwC-2 NO PRINTOUT DISCARD LUC 10 -LITTLE WICr<.SLlN CREEK ABOVE ~lCKS~N CREEK 6.95 5.14 z.s7 15.84 u o ~o PRINTUUT TITLEJ CONFL~~NCE WICKSlJN CkEEK BELuW LlTTL~ ~ICKSON C~EEr<. NU PRI~TOLJT DISCAKO LUC 11 -~ICK~ON LREEr<. tiE~G~ JLU KELIANCE RQAU 3~.18 14.~0 7.82 7.41 0 0 90 D I SP LAY P U I i'i T DISCAKD LDC 12 -wICKSO~ CREEK A8UVE MATHIS CREEK 37.45 15.75 7.63 7.11 0 0 90 DISPLAY PUINT LUC lJ -MATHIS CkEEK HEALlWATERS 8.60 6.24 3.29 11.32 0 0 90 DISPLAY PUINT OISCAkD LOC 14 -MATHlS CkEEK d~LJ~ H~Y lYO 10.64 7.50 4.00 11.38 0 J 90 DISPLAY PUI1H DISCAr<.D LlJC 15 -MATHIS CKEEK A6J~E Tr<.Id MC-1 lL.14 9.12 4.55 10.09 C 0 90 Tt.6LE 9 lM2PK*oRAZUSCO PA Ge ::; 3 SEP o7 -10:02:45 ======================================== DISPLAY PGINT DISCARD LuC lb -MATHIS C~EEK AdOVE AICKS~N CKEEK 13.65 11.36 6.07 o.bC C 0 90 PRINTOUT TITLEu COiiFLUtNCE WICKSON CKEEK SELuW MATHIS CREE~ NC PRINTOUT DISCAKD LOC 17 -nICKSJN CREEK ABGVE STEEP HOLLJ W B~A~Crl 5o.18 17.74 g.37 7.29 0 0 90 D I S P L ti Y P U I i'< T LJC ld -STEEP HOLLOW BRANCH ABOVE wr~KSON CREE~ 3.67 4.o6 2.3~ ~0.05 0 0 YO PRINTlJUT TITLEU CONFLUENCE WICKSlJN CkEEK BELOW STEEP HULLOW ~RANCH NO PRINTOUT DISCARD LuC 19 -v.ICK :>Or~ ~REC-c\ dELOf'I t<OA D "B" 60.78 20.~l 10.84 6.73 0 v YO DISPLAY PLIINT ENDOPTil.JN OPTION 3 LDC 1 -CARTERS CREEK HEAJWATERS 41.88 12.39 5.85 8.61 60 ~5 90 DISPLAY Pl.JI;H DISCARD LJC 2 -CARTEKS C~EEK BELG~ Tkib CC-1 5u.~2 15.78 7.~4 7.19 40 25 90 DISPLAY PGi rH DISCARD LUC 3 -CARTEkS CKEE~ BELuW Tklo cc-z 53.58 17.48 8.98 o.71 30 i5 90 DI SPLAY P 0I1H E ~iDOP TI ON --------------- T:.Bi...c 3 BR AZOS COUN TY LIMITED DE TAI LED ST UDY LICK CREEK SEP 19 67 BRAZOS COJN TY * LIMITED DETAILEU STUDY ~ LICK C~EEK * S E? l 9d7 UN IT HYORO G ~AP H DATA -OPTION 1 IND EX ?DIN T LDC l -LiCK DA-Su.i'II = S ST-FT /M I = CT = i.J PR-CF S /MI = IMPE i<.V I. = IN OEX POI NT LO C 2 -LICK OA-Sl.l.1"\I = SST-F T /MI = CT = t.i PR-CF S /MI = IMPERV I. = I NDEX POI NT LDC 3 -TRI a UA-SO .MI = SST -FT /MI = CT = i.J P R-CFS/M I = IM P Ei<V I. = INDEX ?D I NT LDC 4 -L I ~K UA-S Q.MI = S ST-FT/MI = CT = J P R-CF S /i'1 I = I MPE RV % = 1--------------------------------------------------C.:.E EK HEAUWATt:R ~ .i:.BOVE HWY 0 1.02 L-1'1l LE = 2 .10 LCA -MILE = 1.13 2 1.65 JK.BAN % = 2v .OO CP 6<+0 = 4o0 .0U 0 .89 TP -riOUR = l .lb TPR-HOU R = 1.1 7 3Y4 .39 QPRl -CFS = Lt 0~.28 TR -HO Ur< = 0 .2, 10 .0 0 I. SAND = 90 .J O 2-------------------------------------------------- C KE E K ABO V[ TK.Iti LC -1 1.7 2 L-1'1 IL E 22.84 1 .00 2 6 7.54 5.00 Ul<B AN I. T P-HOUR QP Rl-CFS I. SANO = = = = = j .10 10 .0 0 l..61 4 94.58 90 .00 L CA -i'1 IL E CP 64 0 TPR -rlOU R TR-HU U R = = = = 1 . 5 'J 4b0 .00 l .6u 0.25 3 -------------------------------------------------- L\..-l ABOVE L.ICK CREEK 1. 53 L-MI LE = 2 .64 LCA -i'l ILE = 1. 4j :..s . lo u r<.BAN % = 2 0 .uO CP 6 40 = 4o0 .JG 0 .9 6 TP -HOU R = l . 't 3 TP R-riO Uf\ = l • 't j 32.2 . 52 Ut'Rl -CFS = 't93 .45 TR -HUU "1. = 0 .2 5 1 0.00 'I SANLl = 9u.oo l o 5--------------------------------------------------CK.EEK ABOVE SPRiNG CREEK 4 .4 3 L-Ml LE = Lt .'14 L.CA -1 1I L E 3 .2:.i 18. 11 Ut\BA N I. = ,.oo CP 64 0 = 400 .00 1 .19 TP -nOUR = 2.. 7 3 TPR-HOUR = 2 .67 172.40 i.J r1Ri -CF S = 1 6 .:j. 72 TR -HUU R = 0 • 2 :5 2 . Ou 7. SAN U = 9 0.0 0 IN DE X PO IN T 6-------------------------------------------------- LGC 5 -S P kI1~G UA -S Q .MI = s ::T -f=T /MI = CT = 1.j P k -C F S I i1I = I~P r:~v I. = CkEEi< 3 .74 i5.46 1 . 15 176. 39 7.00 Ao OVE L l C;<. CRtEK L-1'1ILt:: Ur\BAN I. TP -nOuf.I. Ot'Rl -CFS I. SANu = ::i . ~ 5 1..CA-1·1 I LE = 3 .0o = l:i .00 CP 6 40 = 4 00.0 0 = t:.o7 TPK -riUU K = 2 • 6 .L = 65'1 . 70 fR -Hu UK. = 0 .25 = 9 v.UO ( C Ji ~ T I l.J) 8RAZOS COlJNTY LIMITED DETAILED STuDY LIC" CKC:E~ SEP 1Yd7 3RAZOS ~OuNTY * LIMITED DETAILEJ ST lJ DY ¥ LICK CKEEK * s ~P iYb7 UldT HYDRUGKAPH DATA -LlPTIUN 1 l NuC:X POINT 8 -------------------------------------------------- LDC 0 -LI CK c .... Et:i< At30V E ALUi1 \..REEK QA-S O.MI = l 0.05 L-MI LE = 7 .23 LCA -11ILE = 4 .97 SS T-FT /1"11 = 13 .83 Uri.a AN I. = :) • uo CP o <tO = 4o0 .Gu CT = 1.34 Ti'-HOU R = j .-n TPK -nOUR = 3 .80 l.iP R-CF S /i1 I = 121.05 Qf'Rl -CFS = lll6 .o4 TR -HUUi<. = 0 .2? IM P ERV I. = 2 .0 0 7. SA NU = 9 u.uo INDEX .POIN T LDC 7 -Al l.JM 9--------------------------------------------------C KEE K ABOVE T~IB AC -2 OA -S Q . i1 I = 0.19 L-MI L E = SST -FT/f"II = 53 .57 UKB AN I. = CT = O. 7 1 Tf -HOUR. = QP R-CFS/M I = 8 71.2 5 QP Rl-CFS = IM P ER V I. = O.OO I. SANO = u . 75 u. uo l). 49 16 5 . 5 4 90 .00 L.CA -rl ILE CP 640 TPt<.-nOUR TR -HU U R = = = = 0.3d 4o0 .0U o .5.; 0 .25 INDEX POIN T 10-------------------------------------------------- LDC a -TRIB AC -l ABOVc ALUM CKEEK Ll A-5J.MI = 0 .17 L-MILE = 0 .oo LCA-M!L~ = 0 .3o SS T-t= TI r1 l = CT = :..iPR -CFS/MI = IMPEKV i~ = '10.82 o.74 804 .88 o .oo Ut<6AN I. = TP -nO UR = 0.JPRl -CFS = 7. SA1'W = v o 00 .· 0 \..1 a "t0 :;:: 4 o 0 .j0 u. "ta TPk -rlOUI< = 0 . 5 .:'. l50."t3 TR.-Hu U K. = 0 . 2 '.) 9u .OO INDEX POINT LDC 9 -ALU i1 DA -SQ .MI SST -FT/Ml i2 -------------------------------------------------- CT :.i P K-C F S I 1'\ I IM PE RV I. = = = = = CK EEK AdLJ"I E 0 .86 t.. 7 . 7 2 0.90 4'74 .76 o.oo TK I ci AC -3 L-MI LE Ut<.BAN I. Ttl -HOUR uPRl-CFS I. . S AN Li = i.j5 LCA -i'l I Le = 0 .77 = u.oo CP 640 = 4o0 .0U = 0.91 TPK -nOU R = 0 • y;; = 't2?.'tg rR -HUU R = 0 .25 = 90.00 INLlEX ~DINT i3-------------------------------------------------- LOC 10 -T~I~ AC-3 ABOVE ALUM CREE~ UA -SQ.MI = 0 .98 L-Mllt = 1 . -j 2 LCA -i"l ILE = l.Oo S ST -FT/MI : 36.31 JK8AN % = lu .JO CP 6 't (J = 4 60 .0lJ CT = 0 .85 fP-nOuR = l.u5 TPk -nOUK = 1 .Ju ~P~-CFS/HI = 433 .15 QP~l-CFS = 't24 .4g TR -HUUR = 0.2? I~PERV I. = 5 .00 7. SANO = 9u .uo TAc3Li: 3 lCJNT'lJl E~ECUTEG JN 3 s ;:~ o7 AT 10 :J3 :2o Bf.l.AZOS COUNTY LIMIH:D DETAILEu STUDY LICK C.<.t:Ei<. SEP 1987 BKAZOS COUNTY * LIMITED DETAILEu STUDY ~ LICK CkEEK * S~P 1~87 U~lT HYDROGRAPH DATA -uPTIUN 1 INDEX ~DINT 15-------------------------------------------------- LDC 11 -ALUM CREEK AS~VE TkIB AC -4 DA-SiJ.ril = 2.61 L-MlLE :SST-FT/Ml = CT = l.iPR-CFS/MI = IMPERV % = 25 .41 0 .95 273.65 10.00 UK BAN I. T?-HOlJR wPRl-CFS I. SAND = = = = = J.c:'.6 2v.OO l.70 714.24 90.00 LCA-i1ILE CP o'tO TPR-rlOU R TR-HuU K = = = = 2.14 4bO .ou l .oo 0 • 2. , INDEX POINT LOC 12 -ALUM 16-------------------------------------------------- CREEK AoUVE TRlB AC-i UA-S Q •• 1 I = 3.08 L-MILE = j.64 LCA-11 I LE = 2.3b SST-FT/Ml = 22.71 URBAN I. = i,.oo CP 640 = 4o0.00 CT = 1.01 TP-HLJUR = 1.93 TPK-nDUR = 1.91 QPR -CFS/MI = 240.94 QPRl-CFS = 742.10 TR-HOUR = o.z; IMPERV % = 7.00 I. SA Nu = 9u.OO INQEX POINT 17-------------------------------------------------- LOC 13 -T~lb AC-1 A50VE Tkiti AC-lA DA-SO.MI = 0.14 L-MILE = u.73 LCA-MILE = 0 .4 5 S ST-FT/Ml = 63 .33 CT = 0.60 WPR-CFS/M~ = ~o9.49 IMPEKV % = 7.00 UK BAN :~ TP-HOUR uPRl-CFS I. SANli = = = = 15.00 CP 6<t 0 = 400 .0J U.<t3 TPi<-MOUR = 0 .47 13~.73 TR-rlUUK = 0.2, 90.00 INuEX POINT LDC 14 -T~dd 18-------------------------------------------------- AC-lA ABOVE f RIB AC-1 DA-SO.Ml = 0.13 L-MlLE SST-FT/Ml = 76.59 UKBAN I. CT = 0.60 TP-rlOUR ·~P r<-CF S /MI Ii"IPERV % = 1052.4 4 ~rRl-CFS = 7.00 I. SAND = = = = = l). 63 u.39 136.dZ 90.CJO LCA-f'1lLE CP 6't0 TPK-hOJR TR-HuU R = = = = 0. 3'1 4b0.0Ci 0.44 0.2; INDEX POINT LO~ 15 -T1d8 20-------------------------------------------------- OA-SO.i'\l = SS T-FT /M I = CT = iJPK.-CFS/MI = lMPERV I. = AC-1 Ab o·\i E 0.54 "'t8. 71 J.73 676.79 5.00 LJ C lo L-MILt: U1<.8AN % T?-riOui{ OPRl-~FS I. SANO = .!. • U4 LCA-1'\ILE = 0.64 = lU.uO CP 640 = 4b0.0CJ = u.o5 TPK-HOUR = a .ob = 3D:Jo47 TR-HUU~ = o.z, = 90.00 1 CuN T'u l c ,\ E ( U TE u u I\! .J .: c 2 ~ 7 :. T 1 0 : u 3 : 3 '-t Bk.AZDS CuUNTY LlMIT~D DE TA ILE~ STLJDY LIC K CRl:::Er<. SE? lgo7 s~AZ O S COUNTY *L I MITE D DETAILEu )T l.JOY~ LICK CKEE K * S c P 1 9 87 U~I T HYDROGRAPH DATA -GPTluN 1 I NDEX rl DIN f LOC 1 6 -Tr<.ID LiA -SQ.,'1I = SST -FT/Ml = CT = l.JPK -CFS/Ml = IM PEK.V I. = IN u EX PO INT L 0 C 1 7 -A '-U 1'1 UA-SQ .1'1I = SST -FT/MI = CT = QPt<.-C FS /MI = IM PERV I. = l.1 -------------------------------------------------- AC -1 il oD VE AL.UM CRE::K o.gz L-f'l l Le = .i.. '1b LCA -1·1 I LE = l. l o 36 .73 LJrU3AN I. = I . UO CP 6 't 0 = 4 o 0 .0U 0 .87 TP -HOU R = l • .i..l T PR-ri DU R = l .lj 40 8 . 8 5 .;;PRl -CFS = 37 b.l4 TR -HU Uk = 0 • 2 '.:> 3 .00 I. SANU = 9 u .uO 23-------------------------------------------------- c REE i< A 6 u VE LICK C i<. E ~ ;~ 4 .40 L-MIU: = 16 .40 Ut<.BAN I. = 1.18 TP -rlOUR = 172 .98 QPRl -CFS = 5 .oo I. SAND = 't .-17 lu .OO l. • 7 2 761 .10 90 .00 LC i::.-i'IIL.E CP 6"t0 TPR -HDU R TR -HUUR = = = = 3 . 3 L) 4o0 .00 2 .6b 0 .25 INDEX POIN T 25-------------------------------------------------- 1...DC 18 -L iCK C~EE~ dELO~ TRIB LC -2 DA-SQ • i'1 I = 16 • 5 0 L -M I L E = o • L 2 L C A -1·1 I L. E = 4 • 7 2 SST -FT/MI = CT = ~PR -CF.5 /MI = li'1 P ERI/ I. = I NDEX POINT LDC 19 -LIC K OA-SQ .Ml = SST-F T /Ml = CT = l.i P R -C F S I i1I = IM P ER.V I. = I NDEX PO I NT L 0 C 2 0 - L I C'\ uA -SQ .,'11 = SST -FT/MI = CT = uPt<..-CFS/MI = IMPERV I. = .i.2 . 66 Ut<..8A N ., = :).J O ,. D 6 '-10 = 't o O . CL .J ;. ·~I 1.37 TP-HOUR = '1 • .i. 0 TPi<.-rlDUR = 3 .Yo 115 .68 Qr'!<.l -CFS = bOo.73 P.-ri l.J U i< = J . 2 '.) 3 .00 I. SANU = 9 u. vo 2 6 -------------------------------------------------- C RI: EK BELOn !(.DA D "A" 1 8.28 L-M I L E 11. 31 Ux BAN I. 1 .47 TP -HOUR 10 1.97 WPR l-CFS O.OO I. SAND = = '-i . 0 7 lj . 00 = 4 .bo = 1 663 .97 = 90 .UO LCA -1'\ I LE CP 640 TPK -h OUR TR -Hu U f<. = = = = 4.8~ 460.00 4 .51 0 • l. '.:> 27 --------------------------------------------------i,;R EEr<.. i.X6LlVE I ~ Av AS 0 TA RIV t:r< 2 0.57 L-i1I L E = 12.0 3 LCA -r·l I LE = 6 . b 5 9.64 UK BAN I. = (,;. 00 CP 64 0 = 4bO.Ou 1 .58 Ti-'-MOU R = ::i . 0 8 T P X.-110U i<. = 5 . 0 i d 1. 07 l.lPRl -CFS = lb67 . 71 TR-HO UK = 0 .25 o .oo I. SANL) = '-10.0 0 ------------------------- cAE CU TE~ u N ~ S EP 67 ~T LO:J4 :14 BKAZOS COUNTY LIMITED DcTAILEu STUDY ·..IICKSLJN CK.EEK SEP 19o7 BRAiOS COUNTY * LIMITED DETAILED STJDY * ~rcKSON C~EE~ * SEP i 9 c UNIT HYDROGRAPH DATA -OPTION 2 I NDEX ~OINf L8-------------------------------------------------- L0C l -nICK S ON CR~EK rlEADhATE ~S AoOVE WILCOX ~ANE UA-SQ.MI = 16.70 L-MllE = d.30 LCA-MILE = 4.3~ SST-FT/MI = 9.97 UKBAN % = u.00 C? 640 = 4o0.0u CT = 1.47 TP-rlOUR = 4.32 TPR-nOUR = 4.1 ~ QPK-CFS/MI = lu9.87 QPRl-~FS = lo34.o4 TR-HuUK = 0.2~ IMPERV I. = o.oo I. SANu = 9u.oo INDEX POINT 29-------------------------------------------------- LDC 2 -~ICKSO~ CREEK ABOVE TR1B WC-1 DA-SO.MI = 19.84 L-MILE SST-FT/MI = 8.99 U~8AN I. CT = 1.57 TP-rlOUR QPR-CFS/MI = 88.31 QPRl-CFS IM PE RV I. = 0.00 % SANO = = = :>.39 = 175i::.OO = 90. 00 LCA-11ILE CP 640 TPi<-HOU R TR-rluUK = = = = 5 • 8::) 460.0iJ 5.21 lNOEX POINT 30-------------------------------------------------- LDC 3 -TRIB ~C-l ABUVE ~ICKSON C~EEK QA-SQ.MI = 1.41 L-MILE = 2.52 LCA-MILE = 1.67 SST-FT/MI = 2 5.9 3 UKBA N % = J.JO L? b ~O = 4 o0.0 0 CT = 1.02 TP-HOUR = 1.57 TPi<-riOUR = l.5o 1.1PR-CFS/M! = 2~4.15 J PRl-CFS = ~l~.75 TR-HUUK = 0.2? IMPEKV I. = 0.00 I. SANO = 90.uO INDEX POINf 32-------------------------------------------------- LDC 4 -~I~KSON CREEK ABOVE LITTLE ~ICKSuN CKEEK UA-SW.MI = 21.73 L-MILE = li.47 SST-FT/MI = 8.37 UKBAN I. = 0.00 CT = 1.60 TP-riOUR = ,.60 QPR-CFS/MI = d5.04 QPRl-CFS = ld47.~8 IMPEKV I. = o.oo I. SAND = 9u.oo LCA-11 ILE CP 640 TPR-nOUR TR-HuU K = = = = 5.73 4o0.0 0 5.4i 0.25 INDEX POINT LDC 5 -LifTLE 33-------------------------------------------------- W l C~SON CREcK Ht AUWATERS DA-SQ .1'1 I = 1. 72 2 9. 19 SST-FT /I'll = CT _jp R-CF 5 /MI IMPERV I. = 0.9 2 = 433.91 = o.oo L-M!LE = U"BAN I. = TP-HOUR = QPRl-CFS = I. SANU = i. /j 3 LCA-MILE = 0.84 u.oo CP 6 <tO = 460. 00 .1.. 05 TPR-HOUR = l.Oo 740 •. B TR-HUUR = 0.25 9u.oo TABLE 4 (CONf'O l EA ECUTE J JN 3 ~E~ 8 7 AT 10:04:2 2 Bi<.AZOS COUNTY LIMITED DETAILED STUDY WlCKSUN CREC:K SC:P 19b7 BRAZOS COUNTY * LIMITED DETAILEJ STUDY * nICK~ON CREEK v SEP l 9o7 I:-ID EX POINT i..OC 6 -i..ITTLE DA -Su .MI = SST-FT/MI = ~ ... \..I = i.JPK-CFS/MI = HI PE RV I. = INDEX POINT UNIT HYDROGKAPH DATA -OPTION 2 34-------------------------------------------------- ~ 1 c~ SON CREEK AciOVE TRiti L WC-1 2.28 L-MILE = 2 .91 = 1. 5 0 21 .Sb UKBAN I. = u .00 l.? o-tO T?t<-HOU R TR -HuUk = 4o0 .0U 1.06 TP-HOUR = l .b5 280.52 QPRl -CFS = 039.59 = o.oo I. SANO = 9u .oo 3 5----------------------------.---------------------- 1. 6-t 0 . 2 '.) LDC 7 -7RlB L n C -l ABOVE LITTLE ~ICKSON CRtE~ DA -SQ.MI = SST-FT /1'11 = CT = QPR -CFS/MI = IMP ERV I. = INDEX POINT LDC d -i...I TTL..E ;)A-SQ .MI = SST-FT/MI = CT = \.iPt<-CFS/MI = IMP ERV ., = 1• INLJEX POINT 0.34 L-MILE = 1.12 36.90 UKBAN I. = O.UO 0.82 TP-HOUR = 0.75 593.96 OPRl -CFS = 201.95 O.OO I. SANU = 90 .00 LCA-l'IILE CP 640 TPK-HOUR TR-HUUR = = = = 0 .64 460 .00 0 .11 0. 2·5 37 -------------------------------------------------- W ICKSON CREEK AbOVE TRlci LWC -l 3.14 L-MILE = 3.72 20 .07 URBAN I. = 0 .00 1.12 TP-hOuR = 1 .~7 236.80 QPRl-CFS = 743 .54 0.00 1. SAND = 90 .00 LCA -i1 ILE ~p 640 TPi<.-rlOUR TR -HUU k = = = = 1. 79 4 o0.JU 1 .94 0 .25 38-------------------------------------------------- LDC 9 -TRlB L~C-2 A80VE LITTLE wICKSON CREEK DA-SQ.MI = SST-FT/MI = CT = wPR -CF S/MI = IMPEK.V I. = 3.04 L-MILE = 3.o7 17 .45 UkBAN I. = 15.00 1.05 TP-HOUR = l.~2 243.2~ OPRl -CFS = 73Y .43 7.00 I. SANu = 90 .00 LCA -11 ILE CP 6~0 TPK-rlOUR TR -rluU R = = = = 2.00 460.00 INDEX POINT ~0 -------------------------------------------------- i...OC 10 -LITTLE /j IC KS 0 r ~ CREC:K A60VE wlCK SOf'.l CRt:Er\ DA-SO.MI = 6.95 L-MILi: = 5 .14 LCA -i'IILE = 2 .67 SST-FT/MI = 15 .84 UkBAN % = u.00 (, p b 40 = 4o0 .00 ~T = 1 .2 5 TP-rlOUR = L.dO TPf<.-nOU R = 2. 73 Q P R -CF S I 11 I = 168.43 QPRl-CFS = 1170.57 T R-rluU i< = 0.25 IMPEr<.V I. = o.oo I. SAND = 90.00 --___________________ _. TABL E 4 \C ON T'Ul EA ECUTEu u N ~ SE ? 67 ~T 1 0:04:35 BKAZOS COUNTY LIMITED D~TAILEO STUDY \~ l CK S 0 N C io( E E K SEP l9b7 8 K A L 0 S C 0 UN TY * L I M I T ED D E TA I L E Ll :::) TU D Y * ,... I C K S 0 I" CR EE K. * S E P 1 9 d 7 UNIT HYURUGRAPH DATA -LlPTI ON 2 IN OEX POINT 4 2-------------------------------------------------- ~oc 11 -wIC~SUN C~EEK aEL8 W OLD R ELIA ~CE ~DAD DA-SQ.MI = 32.18 L-MILE = l~.~O SST-FT/MI = 7.41 UKBAN 7. = O.uO CT = 1.71 TP-HOUR = 7.G5 QPR-CFS/MI = 07.74 QPRl-CFS = 21BU.QO IMPERV I. = O.OO 1. SANG = 9U.OO LCA-11 ILE CP 6<t0 TPR-HOUR TR-HOUR = = = = 7. 8 2 ~b0.00 6.79 0.25· I NO EX POINT 43-------------------------------------------------- LOC 12 -wlCKSQN C~EEK ABOVE MATHI ~ CREE K DA-SQ.Ml = 37.45 L-MlLE = SST-FT/MI = 7.11 UkBAN I. = CT = 1.73 TP-HOUR = QPR-CFS/MI = 05.57 QPRl-CFS = IMPERV I. = O.OO I. SAND = 15. 75 u.oo 7.28 2455.78 90.00 LCA-1·1 I LE ._:p 640 TPR-HOi.J R TR-HUUR = = = = 7.6 3 4o0.0U 7.01 0.25 INuEX POINT 44-------------------------------------------------- LOC 13 -MATHIS CREEK rlEAU~ATE~S OA-SQ. f'I I = S ST-FT/M I = CT = .:J PK-CFS/MI = IMPERV I. = 8.60 l. l. 32 1.37 139.69 o.oo L-i'1l LE IJ K3A N I. TP-HOUR Ql"'Rl-CFS ., SANO 1. = = = = = OoL4 LC A-i1 I LE = 3.29 •J. uo i..;p o <t O :: 4 o 0 .0() J.38 TPr<.-riOUR :: 3 . 2 '1 1201.3 3 TR-ri OU R = 0 .2 5 90.00 I N DE~ POINT 4 5-------------------------------------------------- LOC 14 -MATHI S CREEK dELO~ HWY 190 DA-SQ.MI = 10.64 L-MILE SST-FT/MI = 11.38 UKBAN % CT = 1.41 TP-HOUR J PR-CFS/MI = lll.22 LlP Rl-CFS IMPEKV I. = O.OO I. SANO = 7.50 = u.oo :i.'11 = 1~8Y.77 90.00 = = LCA-i'1 ILE CP 640 TPK-HOU R TR-HuUR = = = = 4.00 46 0. 0 (.) 3. 7" 0.25 IMO EX POINT 46-------------------------------------------------- LOC 15 -MATHI S CR ~EK AB O V ~ TRI S MC -1 DA-SQ.MI = 12.14 SST-FT/MI = 10 .09 CT = 1 .4 8 QPR-CFS/MI = 1 0 4.84 IMPE~V I. = O.OO L-1'1ILE U r:.BAN ;~ TP-HOUR Qt'Rl-CFS I. SANu = = :: = = '1 • 12 LCA-1"IILE = 4.55 o.oo CP 6 40 = 4o0.00 4.::) 3 TPk-rl OU R = 4 . 3 '1 127~.78 TR-HCJU R = 0.25 90.00 EOF TABLE 4 lCLJNT'u l cAECUTEu J N ~ s =P o7 AT 10 :04:43 BRAZOS COuNTY LlMITED DETAILEO STUDY 1~ I C I~ S 0 N C ii. E E K Set> 19ci7 BRAZOS COUNTY * LIMITED DETAI~ED STUDY * ~ICKSO~ CREEK * SEP ~g o 7 UNIT HYUROGRAPH DATA -UPTIUN 2 INDEX POINT 47 -------------------------------------------------- L 0 c.; l 6 -;·1 A TH I ~ C R E E K ;... 8 0 V c 1j I CK S 0 N C :~ t :: I\ UA-SQ.MI = 13.65 L-MlL~ = 11.36 LC~-rl I LE = 6.07 SST-FT/MI = 8.80 U~BAN I. = u.uo CP b40 = 460 .0U CT = 1.59 TP-nOUR = '.).o5 TPR-riOU R = 5.4b QPR-CFS/MI = 84.30 JPRl-CFS = ll5u.72 TR-HUU k = 0 .25 IMPERV I. = 0.00 I. SAND = 9u.OO INDEX POINT 49-------------------------------------------------- LOC 17 -~ICKSLN ·c~EEK ABOVE STEEP HOLLOW 6RAN~H DA-SQ.MI = 56.18 L-MILc = 17.74 SST-FT/MI = 7.29 UKBAN % = 0.00 CT = 1.78 TP-rlOUR = b.37 QPR-CFS/MI = 57.10 OPRl-CFS = 320d.l0 IMPERV % = O.OO % SANL = 90.00 LCA-1'1 I LE CP 640 TPR-HOU R TR-HUU R = q. 8 7 = 460.00 = 8 .0o = 0.25 INDEX POINT 50-------------------------------------------------- LDC 18 -STE C:P HOLLO~ cl RANCH A80VE WICKS UN CK EEK OA -S J. i·1 I = 3.67 L-MILE = <,.ti6 LCA-1·1 ILE = 2.39 SST-FT/MI = 20 .05 UK BAN % = u.uo CP b"tO = 460.0G CT = 1.17 TP-HOUR = t.. "t 4 TPR-rlOUR = 2. 3"1 IJPK-CFS/MI = 192.47 QPRl-CFS = 70o .37 iR-HUUk. = 0 .2:) IM PE RV ., = o.oo I. SAND = 90. 00 I. INDEX POINT '.)2-------------------------------------------------- LOC 19 -~ICi<S ON C:<.EEK BELUW ROAD 11 8 11 OA-SO.Ml = 66.78 L-MILt SST-FT/MI = 6.73 UKBAN % CT = 1.84 TP-HOUR w P 1<.-C F S I 11 I = 5 1 • 6 5 Q P R 1-CF S IMPERV % = O.OO 1. SAND = = = 20.t!l o.uo '1. 2 7 = 3440.69 90.00 = LCA-MlLE CP 640 TPK-tiOUR TR-HUUR = = = = 10.84 4oO.OO 8.91 0 • 2::) EOF TABLc 5 ExE~UfE0 uN ~ SEP d7 AT 10 :0 5:1, BRAZOS COUNTY LIMITED DETAI~ED STuOY CARTERS CREEK SEP 1987 BRAZOS COUNTY * LIMITED DETAILE~ STUDY * CARTER~ CREEK ~ SE? l 9 d 7 UNIT rl YDRGGRAPH DATA -OPTIGN 3 INuEX POINT 53 -------------------------------------------------- LOC l -CAKTERS CREEK HEAO~ATERS UA -SO.MI = SST-FT/MI = CT = QPR -CFS/MI = IMPERV I. = 'tl. 8 8 8.61 l. 11 118.38 35.0 0 L-MILE Ur<.-SAN % TP-HOlJR CPRl-CFS I. SANO = = = = = 12d9 LCA-1'1 ILE = 5.85 bu.JO CP 640 = 460 .00 4. 01 TPR-HOiJR = 3 . 8 '1 4'157.76 TR-rlUU R = 0 .2 5 90.00 INDEX POINT 54-------------------------------------------------- LOC 2 -CAK TERS CREEK oELOw TRIB CC-l DA-SQ.MI = ?0.42 L-MILE SST-FT/MI = 7.19 URBAN % CT = l.3b TP-HOUR QPR-CFS/MI = 02.44 UPRl-CFS IMPERV % = 25.00 % SAND 15.78 40.00 5.78 ·= 4150. 43 = = = = 90.00 LCA-MILE CP 640 TPK-HOU R TR-HuUi<. = = = = 7 .94 460.0u 5.5o 0.25 INDEX PO IN T 55-------------------------------------------------- LOC 3 -CA~TE R~· CREEK DA -SQ.MI = 53 .58 SST-FT/MI CT WPr<-CFS/MI IMPERV % = = = = a .71 1.49 70.30 15.00 o E LO.~ TRIB CC-2 L-Mllf UK.BAN I. T P-HO UR OPRl -CF S % SANU = 17.48 L CA-MI LE = >3 . g 0 = 3Li .JO CP 6 '+ 0 = 4o 0 .()J = o.79 TPR-HOUR = b . 5 't = 376o.79 TR -rl UU R = 0 .2:; = 9u.oo TAoL.: o EAE CU TE ~ uN j S ~~ o 7 4 T lO :u3:5i Br<.AZOS COUNTY LIMITED DETAILEU ~TUDY LICK CREEr< SEP l9d7 3~AZOS COUNTY * LIMITED DETAILED STUDY * LICK C~EEr< * SEP 1 ~8 7 COMPUTEu PRUBA8ILITY DI5CHAKGE OPTION l I i WE X L U CAT l 0 '" 100 YEAR NEW TRIS---------------------------------------- 3 LDC 3 -TRIS LC-1 AduVE LICK CREEK 1.53 NEW TRIB---------------------------------------- b LDC 5 -SPRING C~EEK A~OVE LICK CREEK 3 • 7 't NEW TRIS---------------------------------------- 10 LDC 8 -TRIB AC-2 ABUVE ALUM CREEK 0.17 NE W TRIB---------------------------------------- 13 LDC 10 -T~I ~ AC-3 A6DVE ALU M CREEK N E ~ TRIB-----------------~---------------------- ld LDC 14 -TKio AC-lA ABOV= · TRio AC-1 O.lJ N~~ TRI3---------------------------------------- 17 LDC 13 -TR.Io AC-1 AtrnV E TRib 0.14 AC-lA :!.9 TR I 8 AC-l jEi...Ofi TK. i 5 AC-lA I) • 2 7 20 LOC 1 5 -T r<I ti AC-1 AilOVE L Li C '.j. 5 4 16 2i LDC 16 -T~I b AC-1 Ad DYE ALU 1\1 0. 92. CREEK NEh TRI a---------------------------------------- 9 LDC 7 -ALUM CKEcK ABOVE TRiti 0.19 2<t52.. 3408. 503. l'10o. 't 1 7. 'f 31.J • o <to. 136;;. 112 '"t. 55d. I i ~OEX 11 12 14 15 16 22 23 TAbL:: o 8kAZOS CJuNTY LiMITcD D~TAILcu SiUOY LICK CRC:Eil. S EP 1967 ( l.ONT I D) BRAZOS COUNTY * LIMITED DETAIL~~ STUDY * LICK CkEcK * SE? 1~8 7 COMPUTED PRLlBABI~ITY DISCHAkGE OPTIO~ 1 LOC:.TIOi'l OA-~Q. ,1 .I. ~ou YEAR ALUM CREEK BELUW TR Io AC-2 0.3b 105'1. LDC 9 -1-1LUM CREEK ~BOVE TK I ti 0.8b 1811. AC-3 ALUM Ci<.EC:K BtllJW TR Id AC-3 l. 84 3585. LDC 11 -ALU1"1 CRC:EK ABOVf 2.61 3725. TRIB AC-4 LDC 12 -ALUi'I CRcEK ABOVE 3.08 4015. TRI a AC-1 ALUM CREEK BELOW TiUf) AC-1 4.00 5318. L.OC 17 -ALU1'1 CREEK ABOVE 4. 4u 4' l ::>. LICK CREEK MAI~ STEM---------------------------------------- l 1..0C l -LICK Cl<.E EK HEAOWATE~S 1.02 lb7u. ABOVE HwY 6 2 LDC 2 -LICK CREEK Aaov E Tide 1.72 2547. LC-1 't LICK Ci<EtK BELU;..J TR Io LC-1 3.25 46 g 7. 5 LDC 4 -LICK CREEK ABOVE 4.43 4:>2o. SP RI t'-.G CREEK 7 LICK CREEK BELOW SPRING CRcEK 8.17 8315. 8 LDC b -... I CK CREcK ;.\bOV E ALUM 10. 0 J 7bl:). CREEK 24 LICK C;<.Et:K BELOW ALU 11 CRt:EK 14.45 ll54d. 25 LOC 18 -LI CK CRcEK El ELO,.. 16.50 12220. TRI~ LC-2 fAtjLC: o (C ON T'D) cA ECUTE u UN J S cP 8 7 AT 10!03!5? I ND EX L 0 CA TI 0 r~ BkALOS COUNTY LIMITED DETAILED STUDY LICK. CREEK SEP 1 9 67 SKAZOS COUNTY * L I MITED DETAILE D STUDY * LICK C~EEK * S~~ 1 Yd7 COMPUTED PROBABILITY DISCHARGE OPTION l O A-SQ.~I lOU Y E~R 26 LOC 19 -LICK CRcEK oELOw ROAU "A" 18.2~ 12267. 27 LDC ~O -LICK CKEEK ABOV~ NAVASOTA RIVEK 20.57 1150"1. TAoLE 7 =xECUTEu uN 3 SE? d 7 ~T lO :u4:5J 8KAZDS ClJLJNTY Ll~ITED DETAILED ~TuDY .~ I C i<. S lJ N C R E E K SEP 19b7 BKALOS COUNTY * LIMITED DETAILEu STUDY 9 ~rcKSO~ CR~EK * SE? 190 COMPUTED PROBABILITY DISCHARGE OPTIO.N 2. H~DC:X LOCATION SA-SQ. i'1 l lOu YEAR NEw TRIB---------------------------------------- 30 LDC 3 -fRIB WC-1 ABUVE WICKSON Cr{EEK 1.41 NE~ TKIB---------------------------------------- 35 LDC 7 -fRIB L~C-1 AtiOVE LITTLE ~ICKSON CREEK 0.34 NEW TRIB---------------------------------------- 38 LDC 9 -TRIB LwC-2 ABOVE LITTLE wICKSON CREEK 3.04 NE~ TRIB---------------------------------------- 33 LDC 5 -LITTLE WICK.SON Cr<. EEK 1. 7 2 HEAOl>IATERS 34 LDC b -LITTLE ;.JI CK SUN Cr<.EEK 2.2d A80VE TidB UJC-1 36 LI TT LE wICKSON CREEK BELOW 2. 6 2. TR I es LWC-1 37 LDC 8 -LITTLE WICKSON CREEK 3.14 A80VE T1d8 LWC-2 39 LITT LE wlCKSON CR.EEK BELUW b. 1 d TRI6 L~ (;-2. 4Q LDC 10 -LI TT Li:: rlICKSON CK.EEK 6.95 ABOVE ~~!CK S 0 N C~EEK NEw TRI8---------------------------------------- 44 LDC 13 -MATHIS CREEK HEADWATt:RS d. 6l.) 2120. oOS. 3990. 3333. 330.::'.. 3777. 4023. 7'113. 6 l109. 7440. 45 LDC 14 -MATHIS CREEK BELO~ 10.6't 8255. 1-lWY li.10 , -____________________ _J TAl3Lc: 7 (CONT'D! ExECUTEO JN J S cP o7 AT 1 0:0 4:57 BR.AZOS COUNTY LIMITED DETAILED STUDY WICKSuN CR.l:EK SEP 19o7 8RAZOS COUNTY * LIMITED DETAILEU STUDY * ~ICKSON CREEK * SE~ i 9 b COMPUTED PROBABILITY DISCHARGE OPTION 2 I i" DEX LlJCATION DA-SQ .11 l 100 YEAR 46 LDC i5 -MA Th IS CREEi<. ABOVE 12.14 8't15. TRib i'IC-1 47 LDC 16 -MATHIS CREEK Ath.JVE 13 • 6:5 7972. WICK SUN CREEK NEW T~Ia---------------------------------------- 50 LDC 18 -STEEP HOLLOW BRANCH ABOVE WICKSON CREEK 3.67 4063. MAIN STEM---------------------------------------- 2b LDC l -~ICKSON CREEK HEAUWATERS ABOVt ~ILCOX LANt 29 LDC 2 -~IC KS O~ C~EEK A8 UVE TRI5 wC-1 31 ~ICKSON CREEr\ aELOW TRIB ~c-1 32 LDC 4 -~ICKSON CREEK A~UVE LITTLE ~ICK~ON CREEK 41 wICKSON CREEK BELOW LITTLE WICKSON CKEE:K 42 LDC ll -WICKSON CREEK BtLOw OLD RE~IANCE KOAD 43 LDC 12 -WICKSON CRE~K ~oOVE MATHIS CRfEr\ 46 ~ICKSO~ CREE~ bELO~ MATHIS CREEK 49 LDC 17 -WICKSGN CREtK AuOVE STEEP HuLLOw BRANCH 51 WICKSON CREEK BELOW STEEP HULLOW f>RANCH 16.70 11677. 1 9. 8<t llo?o. 21. 25 12lb2. 21.7 3 l259b. 28.60 l633b. 32.lti 15343. 3 7. 4 5 l 7 2 75. 51.lU 23931. s 6. lo 59.85 22971. TAtjLt 7 CCO NT'Dl EXtCUTEu GN ~ ~c~ o7 AT l v :u 4 :5~ ar<AZOS COUNTY LlMIT~D DETAILEu ~TuDY 11ICi<.SON CKEEK SEP 1967 a~AZOS COUNTY * LIMITED DETAILEu ~TUDY ~ ~ICKSO N ~REE~ ~ SEP i9o ~ COMPUTED PRUBA8IL1TY DISCHARGE OPTIO~ 2 INDEX LUCATIOa; uA-S0.1'11 iOU YEAR 52 LDC 19 -~ICKSON CREEK BELOW 66.78 24;1~. ROAU "B" TAoLc d EXE~UTEu GN j SEP 57 AT 10:05:2 1 BRAZOS COUNTY LIMITED DETAILEJ STUDY CARTERS Cr<.EC:K SEP 19b7 BRAZOS COUNTY * LIMIT~D DETAILED STUDY * CAKTERS CREE~ * SEP l9b - COMPUTED PROBABILITY DISCHARGE OPTION 3 INOEX LOCATION DA-SO .i1l lOu 'f EAR :'1AIN STEM---------------------------------------- 53 LDC l -CART&:RS CREEi<. 4l.8d 31 u8o. HEAOWATERS 54 LDC 2 -~ARTERS CREEK BEL.Ow 50.42 28223. TRIB CC-1 55 LDC 3 -~AkTERS CREEK i3EL0w 53.5d 2614ti. TRIS CC-2 TABLE 10 BRAZOS COUNTY LIMITED DETAIL STUDY TEXAS BRIDGE DIVISION HYDRAULIC MANUAL -DEC 85 PEAK DISCHARGE COMPARISON SEPT 1987 DRAINAGE AREA 100-YEAR PEAK DISCHARGE LOCATION (SQ. MI.) SYNTHETIC (ds) TBDHM (cfs) LICK CREEK HEADWATERS ABOVE HWY 6 1.02 1870 1421 LICK CREEK ABOVE ALUM CREEK 10.05 7815 6314 WICKSON CREEK BELOW OLD RELIANCE ROAD 32.18 15343 12433 MATHIS CREEK ABOVE WICKSON CREEK 13.65 7972 6962 WICKSON CREEK BELOW ROAD "B" 66.78 24514 20589 ... - 30 TABLE 1 SUM MARY OF DISCHARGES ******************************************************* * LICK CREEK -BRAZOS COUNTY LOS JULY 1988 * ******************************************************* * * NO. * * * DESCRIPTION * * DRAINAGE * * * AREA * SQ. Ml * 100 YR * * (CFS) * ******************************************************* * * * * * * * LICK CREEK CONFLUENCE OF NAVASOTA RIVER * 20.57 * 11,500 *@ * * * * * ******************************************************* * * * * LICK CREEK 2 * AT ROCK PRAIRIE ROAD * * * * * * 18.28 * 12 300 * ' - * * ******************************************************* * * LICK CREEK * * * * 3 * AT CONFLUENCE OF * 14.45 * 11,500 * * * ALUM CREEK * * * ******************************************************* * * LICK CREEK * * * * 4 * APPROX . 500 ' U/S OF * 10.05 * 7,800 * * * ALUM CREEK * * * ******************************************************* * * * 5 * LICK CREEK * AT CONFLUENCE OF * SPRING CREEK * * * 8 • 1 7 * * * 8,300 * * * ******************************************************* * * LICK CREEK * * * * 6 * APPROX. 500' U/S OF * 4.43 * 4,500 * * * SPRING CREEK * * * ******************************************************* * * LICK CREEK * * * * 7 * APPROX. 6800' D/S OF * 3.25 * 4,900 * * * HIGHWAY 6 * * * **************************************************~**** * * LICK CREEK * * * * 8 * APPROX. 6300' D/S OF * 1 .72 * 2,500 * * * HIGHWAY 6 * * * ******************************************************* @ @ @ Down stream discharge stream slopes and l onger unit hydrograph 1 imes to decrease is due stream lengths, peaks and l ower to flatter weighted resulting in longer discharges. TABLE i SUMMARY OF DISCHARGES ******************************************************* * ALUM CREEK -BRAZOS COUNTY LOS JULY 1988 * ******************************************************* * * NO. * * * * DESCRIPTION * DRAINAGE * * * AREA * SQ. MI * 100 YR * * {CFS)* ******************************************************* * * * * * * ALUM CREEK CONFLUENCE OF LICK CREEK * * 4.40 * * * * * 4,500 *@ * ******************************************************* * * ALUM CREEK * * * * 2 * AT CONFLUENCE OF * 4.00 * 5,300 * * * STREAM AC-1 * * * ******************************************************* * * ALUM CREEK * * * * 3 * APPROX. 500' U/S OF * 3.08 * 4,000 * * * ALUM CREEK * * * ******************************************************* * * ALUM CREEK * * * * 4 * APPROX. 6,600' D/S OF * 2.61 * 3,700 * * * HIGHWAY 6 * * * ******************************************************* * * ALUM CREEK * * * * 5 * APPROX. 2,000' U/S OF * 1 . 8 4 * 3,600 * * * HIGHWAY 6 * * * ******************************************************* @ Down stream discharge decrease is due to flatter weighted stream slopes and longer stream lengths, resulting in longer unit hydrograph times to peaks and lower discharges. TABLE 1 SUMMARY OF DISCHARGES ******************************************************* * STREAM AC-1 -BRAZOS COUNTY LOS JULY 1988 * ******************************************************* * * NO. * * DESCRIPTION * DRAINAGE * * * AREA * 100 YR * * SQ. Ml * (CFS) * * * ******************************************************* * * * * * * STREAM AC-1 CONFLUENCE OF ALUM CREEK * * * 0.92 * * * * 1,750 * * ******************************************************* * * * * STREAM AC-1 * 2 * APPROX. 6,400' U/S OF * *CONFLUENCE W/ ALUM CREEK * * 0.54 * * * 1,350 * * ******************************************************* * * * * STREAM AC-1 * 3 * APPROX. 9,600' U/S OF * *CONFLUENCE W/ ALUM CREEK * 0.27 * * * * 850 * * ******************************************************* TABLE 1 SUMMARY OF DISCHARGES ******************************************************* * CARTERS CREEK -BRAZOS COUNTY LOS JULY 1988 * ******************************************************* * * NO. * * * * DESCRIPTION * DRAINAGE * * * * AREA SQ. Ml * 100 YR * * {CFS) * ******************************************************* * * * * CARTERS CREEK * * APPROX. 19,600 0/S OF * * BIRD POND ROAD * * * 53.58 * 26,200 *@ * * ******************************************************* * * * * CARTERS CREEK 2 * APPROX. 7,000 D/S OF * BIRD POND ROAD * * * * 50.42 * 28,200 * @ * * * ******************************************************* * * * * CARTERS CREEK 3 * APPROX. 6,500 U/S OF * BIRD POND ROAD * * 41 . 88 * * * * 31,100 * * * ******************************************************* @ Down stream discharge decrease is due to flatter weighted stream slopes and l onger stream lengths, resulting in longer unit hydrograph times to peaks an ci lower discnarges. TABLE 1 SUMMARY OF DISCHARGES page 1 of 2 ******************************************************* * WICKSON CREEK -BRAZOS COUNTY LDS JULY 1988 * ******************************************************* * * NO. * * * * * * DESCRIPTION * DRAINAGE * * * * * AREA SQ. Ml * 100 YR * * (CFS) * * * ******************************************************* * * WICKSON CREEK * * * * * * * * * * APPROX. 14900' D/S OF * 66.78 * 24,515 * * * ELMO WHEEDEN ROAD * * * * * * * * ******************************************************* * * WICKKSON CREEK * * * * * * * * * 2 * APPROX. 1500' U/S OF * 59.85 * 22,970 * * * ELMO WHEEDEN ROAD * * * * * * * * ******************************************************* * * WICKSON CREEK * * * * * * * * * 3 * AT CONFLUENCE OF * 5 6. 18 * 22,655 * * * STEEP HOLLOW BRANCH * * * * * * * * ******************************************************* * * WICKSON CREEK * * * * * * * * * 4 * APPROX. 2030' U/S OF * 5 1. 1 0 * 23,930 * * * FM 1 1 7 9 * * * * * * * * ******************************************************* * * WICKSON CREEK * * * * * * * * * 5 * AT CONFLUENCE OF * 37.45 * 17,275 * * * MATHIS CREEK * * * * * * * * ******************************************************* * * * * * 6 * WICKSON CREEK * *APPROX. 1020' D/SOF * OLD RELIANCE ROAD * * * * 32.18 * * * * * * * 15,345 * * * * * ******************************************************* @ @ @ Down stream discharge decrease is due to flatter weighted stream slopes and longer stream lengths, resulting in longer unit hydrograph times to peaks and lower discharges. TABLE 1 SUMMARY OF DISCHARGES page 2 of 2 ******************************************************* * WICKSON CREEK -BRAZOS COUNTY LDS JULY 1988 * ******************************************************* * * NO. * * * * * * DESCRIPTION * DRAINAGE * * * * * AREA SQ. Ml * 100 YR * * (CFS) * * * ******************************************************* * * WICKSON CREEK * * * * * * * * * 7 * APPROX. 4050' D/S OF * 28.68 * 16,335 * * * us. HWY 190 * * * * * * * * ******************************************************* * * WICKSON CREEK * * * * * * * * * 8 * AT CONFLUENCE OF * 21 . 7 3 * 12,595 * * * LITTLE WICKSON CREEK * * * * * * * * ******************************************************* * * WICKSON CREEK * * * * * * * * * 9 * APPROX. 3650' U/S OF * 21 . 25 * 12, 160 * * * us. HWY 190 * * * * * * * * ******************************************************* * * WICKSON CREEK * * * * * * * * * 10 * AT LEFT BANK TRIS * 19. 84 * 11. 880 * * * APPROX. 4400' U/S OF * * * * * us. HWY 190 * * * ******************************************************* TABLE 1 SUMMARY OF D I SCHARGES ******************************************************* * MATHIS CREEK -BRAZOS COUNTY LOS JULY 1988 * ******************************************************* * * * DRAINAGE * * * NO. * * * DESCRIPTION * AREA * SQ. Ml * 100 YR * * (CFS} * ******************************************************* * * * * * * MATHIS CREEK CONFLUENCE OF WICKSON CREEK * * * * * 13.65 * 8,000 *@ * * ******************************************************* * * * 2 * MATHIS CREEK * * APPROX. 7,900' D/S OF * * HIGHWAY 190 * * * 12. 14 * 8,400 * * * ******************************************************* * * * * 3 * * MATHIS CREEK AT HIGHWAY 190 * * * * * 10.64 * 8,300 * * * ******************************************************* * * * * MATHIS CREEK * 4 * APPROX. 7,900' U/S OF * * HIGHWAY 190 * 8.64 * * * * 7,500 * * ******************************************************* @ Down stream discharge decrease is due to flatter weighted stream slopes and longer stream lengths, resulting in longer unit hydrograph times to peaks and lower discharges. TABLE 1 SUMMARY OF DISCHARGES ******************************************************* * LITTLE WICKSON CREEK -BRAZOS COUNTY LDS JULY 1988 * ******************************************************* * * * DRAINAGE * * * NO. * DESCRIPTION * AREA * 100 YR * * * * SQ. Ml * (CFS) * ******************************************************* * * LITTLE WICKSON CREEK * * * * * CONFLUENCE OF * 6.95 * 6,900 * * * WICKSON CREEK * * * ******************************************************* * * * * LITTLE WICKSON CREEK * 2 * APPROX. 3,200' D/S OF * * DILLY SHAW ROAD * 6. 1 8 * * * 7,900 * * * ******************************************************* * * LITTLE WICKSON CREEK * * * * 3 * APPROX. 3,000 D/S OF * 3. 14 * 4,000 * * * DILLY SHAW ROAD * * * ******************************************************* * * LITTLE WICKSON CREEK * * * * 4 * APPROX. 1 '300' U/S OF * 2.62 * 3,800 * * * DILLY SHAW ROAD * * * ******************************************************* * * LITTLE WICKSON CREEK * * * * 5 * APPROX. 1 ,500' U/S OF * 2.28 * 3,300 * * * DILLY SHAW ROAD * * * ******************************************************* * * LITTLE WICKSON CREEK * * * * 6 * APPROX. 7,900' U/S OF * 1 . 7 2 * 3,300 * * * DILLY SHAW ROAD * * * ******************************************************* @ @ Down stream discharge decrease is due to flatter weighted stream slopes and longer stream lengths, resulting in longer unit hydrograph times to peaks and lower discharges. ---~--------------------- F REOuEi~CY CLAY 100 YEA~ SAND 100 YC:AK BRAZOS COUNTY LlMITED DETAILED )TUDY LICK CKEEK SEP 1'187 LGSS RA TE S INITIAL LOSS l INChES) o.75 0.90 INF IL T RAT I 01~ CINCHt:S/HuURJ O.J7 u.10 T:.BLE 1 lC JN f'Ul INUEA ?D U H l u ?TilJ N l ~AEC U TE0 ~N ~ S i P o7 AT 1 0 :0~:04 BKAZOS COUNTY L 1"'11 T i:D DETAILED STuDY LICK Cf{EE .<. $E P 19b7 BkAZOS COUNTY ... LIMITED DETAIL ElJ '.:. TUDY t.: LICK Ck EEK -~ s c: p 1937 •r ·r 100 YE 0. R S TURr l CE1Ht:R IN~ L) N LUC l -LICK. CREEK HEADWATEKS At30VE HWY 6 DRAINAGE ARt:A 1 .0 2 SQUARC: i1 ILES HYDROGRAPhS -CFS :<Al i'JF ALL Cl.JR YE'.:> -1 N ~Ht: S HuUK. FLOUD UNIT KAIN LOSS EXCi:SS 0:15 u. 1. o .ul76 O.Ol5Y u .0018 0: 3 0 u . 59. O.Jl80 0 .0162 G.U018 0:45 o . 2~2. o .u1a7 O.Ol6t> 0 .0019 1: 0 l. 35 9 . 0 .0190 0 .0171 C.0019 1: 15 2. 402 . 0 .0198 0.0170 u . JO 20 1: 30 3 . 373. 0.0202 0 .0182 0 .00£:0 1:45 .;) . 311. O.J211 0 .019() :.;. uo a 2 : 0 4. 2 43 . 0 .0215 0 .0194 0 . JO L2 2 :15 4 . l ti 3. 0.0225 0 .020i. 0. 00 22 2:30 ; . 134 . 0.0230 0 .0207 O.J023 2:45 5 . 9 7. 0.0240 0.0216 0.0024 3: 0 5 . 7 0 . 0.0245 0 .0221 u .0 0 25 3:15 5 . 50. 0 .0257 0 .0231 o . 00 ~6 3:30 be 36. 0 .0263 0 .0237 v.00L6 3;45 b . ~6. O.u276 0 .0240 0 .uui::8 4: 0 a. J..8 . 0 .1.1202 0 .0254 v .CJ0£:8 4: 15 o. 13 . 0 .v2Y7 0 .0 2b7 u .uo~o 4:3u 7 . 10. u .J3 0 4 0.021,. 0.0030 4;45 7. 7 . o .u3LO 0.0200 0 .uoj2 5 : 0 7 . 5. 0 .0328 0 .029:) O.U0j3 5: 15 7 . 4. o.u346 J .03li::'. J .0035 5:30 I:). 3. J .0356 0 .0320 0 . 003 6 5:4~ b. 2 . 0 .0376 o.o33o u .0038 6: () o . 1. 0 .0306 0.0340 u.u039 6:15 d • 1 . 0 . u 40 9 0 .0368 C.0041 6:30 9. 1. o . 0421 0 .0379 c.uO<t2 6:45 Y . 1. O.J447 0.0403 G.u045 7: 0 10. o . O.J4bl 0.0 415 l). 00·4 6 7:15 10 . o . ().0491 0 .04.42 C..OO<t9 7:30 10. o. 0 .0507 0 .0373 u .0135 7:45 l i . o . C.\J5tt2 0 .0210 J .U3i4 8: 0 15 . o . u.o5ol 0.0210 0 .0343 8:15 2.:;. o. o .u577 0. 02 lb 0 .0359 8 :30 3 't • o. O .u5o2 0 .0210 u .J 3 b 4 8: 4 '.) 4b . o. 0 .0594 o.021cs 0.0376 lCU N f 1 U l HY OtWC.RAPHS -CFS KAlN F ALL CuR VE S -lNCHES HQUI( F LOO D Ui~ I T RA Ii~ LOS S EX CESS 9 : 0 5 7. o . O.U6 0 0 0 .02 1 0 G.0382 9 :15 6 7 . o. 0 .0615 o .021a u .0397 9 :30 7o . o. 0 . u 6.2:4 0 .0210 Q . 0 40 b 9 :45 3 L • o. O.U6<t4 0 .02U:S 0 .0426 10 : u 86 . o . 0 .u 6:56 0 .0210 G.0438 10 : 15 9 't . o . 'J .J6d4 o .02u~ ll .u4 o 6 .i.0 :3l) 96 . o . 0 . \.) 70 1 0 .02 1 8 u .U4 o 3 10 :4? lOJ . o. 0 .0741 0 .02 l ti i.J .J523 l. 1 : 0 lOd . o . 0 . u 7 66 o . 02 u~ (;.0548 11 : 15 11 j . 0 . u .08 27 0 .0210 c . 06 l 0 ll :3l) 11 li . 0 . 0 .0866 0 .02lb c . J 6't8 .i. l : 4 5 127 . o • u .0966 0 .0 210 i.:. • ..;746 12: 0 135 . o . O .l.0 32 0 .0210 u.ll814 12:15 14,. o . 0 • .1.ll 0 0 .02 1 0 G.08"13 12:30 150 . o . 0 .1140 0.0210 u .u9~3 .i.2 : 4 5 172 . o • U • .i.207 0 .0210 c.u9o9 13 : ij 18 6. 0 . G.1244 0.02 1 0 U.1026 13 :15 20 1. o. 0 .132 6 0.02 l d 0 .11 08 13 :30 21 0. o . 0 .1 371 0.021 8 0 .11 :;4 13 :4:5 23 o . o . 0 . l '• 75 0 .02 1 8 0 .1257 14: 0 2 4 b. o. 0 . i 53 3 o .-02 u :1 u .1 315 14 :15 26 2. o. o . 1 5 9 1 0 .02 10 J .1374 14 :30 2 7 (j . o. C.l.646 o .02u; u .l4c.9 14:4; 2 95. o. 0.2 527 0.021 6 u.2 3 09 15: 0 31 7. o. 0.3 087 0.0 2 11:) u .2870 15:15 3 5 't. o. O.'t250 0 .021 8 O.'t0 32 15:30 4 lo. o. CJ .5 0 88 0 .0216 0 .4870 :..5 :45 51 ,. o . l • ..1.34 g 0 .0210 l • .i.131 16: 0 670 . o . l .'1 0b5 0 .0210 l .d8'17 1 6; l:) -19u. :J • u .o 7i4 0 .0 21 0 0 .0 50 6 16 ;3() 1'132 . o. J ,,j 6o2 0 .02 1 0 l.e ,j4't4 16 :45 l 76'1 . 0 . O • .i.880 0 .02ld ~. i6 0 2 17 : u 1071..J . 0 . o • .i.570 0 .0210 L .13:52 l 7: 15 176't . o . o • .i.4 21 0 .0210 U. l2iJ3 17:30 l54 't. o . 0 • .l.2b3 0.0218 J.l0b5 17:45 1293 . o. 0 .1172 0 .0210 U.U9:>5 18 : () 1 05 d. o . 0 .1082 0 .02 10 o . 08 0 5 1 8: l? 85d . 0 • o .u9 12 0.0218 C.0 6 94 1 8 :30 696 . 0 . 0 . u 79 4 0 .02 l d 0 .0577 ~8 :45 56 0. o . O.J720 0 .021 0 v .0502 .i. 9: l) 4 63 • o. 0 .06 o9 0 .021 0 0 .0 4 :>1 1 9:1:5 3 80. o. 0. 0 6 3 4 0.021 8 u .0 41 6 19:3d 3 1 't. 0 . 0 .0607 0.02 l b C.0390 1 9 :4:) 2 6.'... o . o .u5o tl 0 .02.lu L.037 0 20: 0 2.2 L . 0 . 0 .0 5 72 0 .02lb u .U 355 20:15 19 0 . o. J .0524 0 .0216 J .U306 TAi.:lL:: :_ iC uN i'LJl HlJUK 20:30 20:45 2 1 : iJ z l: 15 21:30 21: 45 22: 0 22:15 22:30 22:45 2 3: u 23:15 23:30 23:45 HYDKO(.;RAPHS-CFS F L 0 Ll D U i'l I T 16'.:>. o. 14?. o. 12d. o. 112. o. 9b. o. 80. o. 7'1. o. 6 3. 0. 5 4. 0. 4?. 0. 3 7. 0. 30. o. 2 4. 0. 19. o. i::4: u 16. o. Z4: 15 13. 24:3() ll. z4:45 4. ~5: 0 7. 25:15 :le 25:30 '+• z5:4; 3. 26: 0 z. 26:15 2. 26:30 l. 26:45 1. 27: 0 l. 2 7:15 u. KA.i.NFALL KA Ii~ 0.0476 0.0434 O.v398 o.u3o5 0. 0 33 7 0.0312 O.J289 u.0209 0.0251 o.u235 0.0220 O.J207 u.ul94 O.ul83 0. 01 73 CwRVES-.iNCHtS LOSS Exci:ss 0.0218 0.0258 0.0210 0.0216 0.02lti u.OldO o.021u c.0148 J.0210 0.0216 0 .021a 0.0210 0. 021 d 0.0211 u.Ol9cs O .OU:lo 0.017? 0.016? 0.0150 c.u11Y G.00'14 L;.0072 0. 00'.:>l u.0033 u. 00 23 0. uo 2.2 0 . uO d u.uOl9 u.0018 u.0017 FLOOD HYOROGRAPrl VOLUME 47o.42 AC-FT ~U N GFF VOLUME <t76.<t0 ~~-FT RAUiFALL lu.'177 INCHES RAINFALL LO~S 2.2L0 INCHE S RA I i~ Fill L c X CE SS a.757 ii'-iCriES