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30 Development Permit 259 Southwood Forest Ph. 5
DEVELOPMENT PERMIT PERMIT NO. 25)r'C\ FOR AREAS OUTSIDE THE SPECIAL FLOOD HAZARD AREA RE: CHAPTER 13 OF THE COLLEGE STATION CITY CODE SITE LEGAL DESCRIPTION: Southwood Forest V SITE ADDRESS: Southwood Forest V. OWNER: Pete Normand. DRAINAGE BASIN: Bee Creek- TYPE OF DEVELOPMENT: This permit is valid for the construction of Southwood Forest Phase V subdivision as shown on the approved plans. Contractor shall install erosion control as necessary to keep silt and debris on site. Contractor shall take all necessary precautions to prevent silt and debris from leaving the site in accordance with the City of College Station Drainage Policy and Design Criteria. Contractor shall assure that all disturbed areas are seeded or sod and establishment of vegetation occurs prior to removal of any silt fencing or hay bales used for temporary erosion control. If silt and debris Owner and/or contractor shall be responsible for any damage to e_xisting city streets or infrastructure due to heavy machinery and/or equipment. 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/outside 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 per,tftit application for the above named project and all of the codes and ordinances of the \<t ity of Colle e Station that apply. ~ -. ~~~J l{cS c ont ra ~4/ TO MUNICIPAL DEVELOPMENT GROUP P.O. Box 9249 203 Holleman Drive East College Station , Texas 77840 -9249 (409) 693-5359 *et>tJ uA ~ef?CaA N Co /c.s. . . ' DATE J08 NO. ~ 7 ~515 f\lf <WJoa;l ~ J_ WE ARE SENOl ~ched 0 Uod~te co,.r v;a _________ the follow i ng items: . O Shop draw i ngs 0 Prints ~ns 0 Samples O Specifications 0 Copy of letter 0 Change order o ____________________ _ COPIES DATE NO. JZ.. THESE ARE T~NSMITTED as checked . ct"For approva l 0 Approved as subm itted 0 For your use O As requested 0 Approved as noted O Returned for corrections DESCRIPTION 0 Subm it __ cop ies for distri bution 0 Return __ corrected pri nts O For review and comment 0 ----------------------- O FOR BIDS DUE _________ 19 ___ 0 PRINTS RETURNED AFTER LOAN TO US . -..... THA~~YOU ~' 323310 --------------· 19 __ _ __ Cash __ THANK YOU --------------~-~~-~------- 323311 ·CITY OF COLLEGE STATION ------------· 19-'"--- ...... . .._ -· ..... ...,. __ Cash __ THANK YOU CITY OF COLLEGE STATION 3.23312 ____________ , 19 __ _ . ,· __ cash __ THANK YOU Figure XII Development Permit City of College Station, Texas Site Legal Description : ~~ ~t ~ "5r. Site Owner: f /i04e, I/ CorporcJwV\ Address: /'o 75i)x /036 / : CJ 77~'/l. J. A.a. s OU fi.wooJ. I AJy-<4 f ~w. eo. Telephone: ~&'4~'6~'1~--6~9 :!~· W~->~-~2~"~· -- Architect/ Engineer : /y!;fl-Tll-813/:r·(ZQSt.l-,l J /2. Address : W) c. ;kJt.,,cM/l.U; es T ~ 77(3'10 ;?~Telephone No : '9)-SJ.J<i kc_ Address : ~----------~ Telephone No : --~7~7_Cf~-~/_f /_2... __ _ Date Application Filed : _______ _ Approved : __________ _ Application is hereby made for the following development specific waterway alterations : ;; Application Fee D Signed Certifications D Drainage and erosion control plan, with supporting Drainage Report two (2) copies each . D Site and Construction Plans, with supporting Drainage Report two (2) copies each. D Other: ----------------------------- ACKNOWLEDGMENTS : I, ~-~ $esign engineer, 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 Drainage Policy and Design Standards . As a condition of approval of this permit application, I agree to construct the improvements proposed in this application according to these documents and the requirements of Chapter 13 of the C lege S ·on · Code . ~ Figure XII Continued CERTIFICATIONS : (for proposed alterations w ithin designated flood hazard areas .) A. I , certify that any nonresidential 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 I 00 year storm . Engineer Date B . I , !J&Bnt B . 8"1-!iDPlL ,),o. certify that the finished floor elevation of the lowest floor , including any basement, of any residential structure, proposed as part ofthis application is at or above the base flood elevation established in the latest Federal Insurance Administration Floc;r;z :{ftr;;;Jt ;~ _____ L~-..,._~3-/~_)~~-f_5 ____ _ Engineer f,. · ik\~ I C . I , certify that the alterations or development covered by this permit shall not diminish the flood-carrying capacity of the waterway adjoining or crossing this permitted 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 of floodway fringes . Engineer Date I , do certify that the proposed alterations do not raise the level of the 100 year flood above elevation established in the latest Federal Insurance Administration Flood Hazard Study. Engineer Date Conditions or comments as part of approval : __________________ _ 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. All development shall be in accordance with the plans and specifications submitted to and approved by the City Engineer for the above named project. All of the applicable codes and ordinances of the City of College Station shall apply . .. Item Description Estimated Unit Unit Amount No. Quantity Price ~ fREET & DR-'-A•• AF~ 1 Realianina Channel Section 220 CY 12.00 2640.00 2 Clearing and Grubbino 0.25 AC 1400.00 350.00 3 Fill -lnplace 180 CY 6.00 1000.00 4 Remove Curb & Glitter & place Valley Gutter 78 LF 22 .00 1716.00 5 Cone. Curb & Gutter 700 LF 7.50 5250.00 6 5'.x2' Box Culvert 56 LF 105.00 5880.00 7 Winowalls 2 EA 1200.00 2400.00 8 Concrete Lined Channel 340 LF 21.00 7140.00 9 Eros. Cont.-Landlok ECRM 450 572 SY 3.50 2002.00 10 Modified Curb Inlets w/ Ring & Cover 2 EA 1200.00 2400.00 11 6" Cone. Apron Section 184 SY 31.50 5796.00 12 1.5" Type"D" Asphalt Pvmt. 1150 SY 3.75 4312.50 13 6" Crushed Limest. Base 1334 SY 6.00 8004.00 14 6" Lime Stab. Suborade 1414 SY 2.30 3252.20 15 Concrete Weir 1 EA 850.00 850.00 16 Seeding 1000 YD 0 .35 350.00 WATERLINE 17 6" DR 14 PVC C900 Cl. 200 (Class D EmbedmenO 729 LF 9.90 7217.10 18 18"x6" M.J. Tap SI. & Valve 1 EA 4500.00 4500.00 19 6" 45° MJ Bend w/ Cone. Thrust Bloekino 2 EA 200.00 400.00 20 6" 90° MJ Bend w/ Cone. Thrust BloCkina 2 EA 200.00 400.00 21 6"x1 .5" Bronze Saddle w/ Coro. Stop 1 EA 700.ob 700.00 22 1" Type K Copper Line 52 LF 13.50 702.00 23 1.5"x1'; Wve 1 EA 57.50 57.50 24 1" Stops 4 EA 17.25 69.00 25 6"x1" Br0nze Saddle w/ Corp. Stop 2 EA 700.00 1400.00 26 8"x6" Increaser Couolina 1 EA 125.00 125.00 27 6" MJ Gate Valve w/ Box 1 EA 300.00 300.00 SEWERLINE 28 6" SS SOR Class 160 (Class D EmbedmenO 852 LF 17.00 14484.00 29 4" PVC Service Line 80 LF 9.00 720.00 30 6" PVC Service Line 20 LF 10.75 215.00 31 4" Wye w/ Plugs 3 EA 57 .50 172.50 32 4' Dia. Std . Manhole & Cover 3 EA 1035.00 3105.00 33 6"x4" 45° Wye w/ Pluos 2 EA 57.50 115.00 Total Amount $ 88104.80 TO MUNICIPAL DEVELOPMENT GROUP P.O. Box 9249 203 Holleman Drive East College Station, Texas 77840-9249 (409) 693-5359 t at.l:?. WE ARE SENDING YOU O Attached O Under separate cover via _________ tfle following items: COPIES ~ O Shop drawings O Copy of letter DATE ~('f/ - 0 Prints O Change order NO. 12z.h.11-U ~e. I 12~ii1} O Plans 0 Samples c( ~\...\tc-l-J& re.~D~ DESCRIPTI ON Sv-1 .v::--T • O Specifications ~ "'\[" THESE ARE TRANSMITTED as checked below : ~For approval 0 For your use 0 As requested 0 Approved as submitted 0 Approved as noted O Returned for corrections 0 Resubmit __ copies ' for approval 0 Submit __ copies for distribution 0 Return __ corrected prints 0 For review and comment 0 ----------------------- 0 FOR BIDS OUE _________ 19 ___ 0 PRINTS RETURNED AFTER LOAN TO US REMARKS--------------------------------------~ COPY ro_k~~.....___._.N\.....,1.~...,,.wLl--:Y ..........------~ ~ SIGNED: >~ H _,...,,... •• -H --""'4ly _,,., ve :/-•· Mr. Ray Havens Electric Transmission & Distribution Superintendent City of College Station P.O. Box 9960 College Station, Texas 77842 McCORD ENGINEERING, INC. 7607 Eas t mark Dr ive, Suite 102, P.O . B o x 10047 Col lege Station , Texas 77842 (409) 7 64-8356 Fa x ( .09) 764-90 4 Apr il 18, 1994 RE: -E lectric Di stri b\. ~rv1ce =-~==-=~=Q....!:=..;..~"'-"~~~="-=='-'.!.!:>.=->--=.!~~'-"'-.Material Dear Ray: In accordance with your request, we have prepared and are enclosing herewith for your review and use five (5) copies of an Electric Distribution/Service & Street Lighting Layout, Bill of Material, and Project Cost Estimate for the proposed Southwood Forest Phase 5 Subdivision Development. A diskette is also enclosed to illustrate the proposed electric and street lighting layout in electronic form for your City's use. Shown on the enclosed electric layout map for this subdivision are proposed electric distribution system and service additions to provide electric service to the 7 lots included in this single-family residential development. An underground electric service layout has been proposed to supply electric service to this development, in accordance with the ordinance requirements of your City. Street light pole installations to provide the maximum 300' spacing dictated by your current City policy and lighting at all street intersections and cul-de-sacs have been specified. Additional easements required to provide services to supply the designated street light installa- tions are also shown on the street lighting plan shown on the enclosed electric layout drawing. In accordance with the new policy of your City , the Developer is responsible for reimbursing your City for 20% of the total estimated cost of electric service installation, including labor, materials, and the standard fee percentages for engineering and o'verhead cost. We compute that the 20% cost contribution required for the Southwood Forest Phase 5 Subdivi - sion amounts to $2,062.60. This cost was calculated based on a total electric service cost estimate of $10,313.00. The total electric service cost estimate developed for this project includes on standard allowance of 30% to cover your City's labor related overhead costs, 7% for material handling costs, and 8.5% to cover your City's administrative and engineering costs . CE\VEO P \9 ... City of College Station April 18, 1994 Page 2 I trust you · will find herewith all the information required. If not , or if questions arise , please do not hesitate to advise. JDM/mw Enclosures cc: . David Pullen (w/encl.) Mr. Bob Pohl Yours very truly, McCORD ENGINEERING, INC. • -&:>. S,,z tJJ.. JimmJ McCord, P .E. President McCord Engin e ering, Inc. CS -TSD-6 -S.5 M A T E R I A L COD E IT EM NO. ---------- 25 c 6 25 d 14 29 Ufz 33 29 Uf z 34 25 j 38 28 UL 50 27 bu 64 25 p 65 28 ae 128 28 af 131 25 ai 150 25 aj 156 28 a p 168 28 bv 218 27 Uhp 230 27 Ugk 232 28 Uhb 276 hj 298 26 Uj 303 28 Uan 400 27 Uhv 523 25 p 759 28 an 780 CITY OF COLLEGE STATION SOUTHWOOD FOREST PHASE 5 B I L L 0 F M A T E R I A L CATALOG MATERIAL DESCRI PT ION REF. NO. ------------------------------------ 5/811 X 12 11 MACHINE BOLT 32002000014 211 X 211 SQUARE WASHER 32002000031 UTILCO BARE TERMINATOR 28500800006 UTILCO INSULATED CONN. 28500800007 LAG SCREW 1/211 X 411 28504700010 UG EQUIPMENT LOCK 832040 1/0 H-TAP COPPER CONN 28502200003 CONNECTOR COMPRESS I ON 285022 MDV LIGHTNING ARRESTER 28500300001 100 AMP OPEN TYPE S&C 28502800001 8 1 COPPERWELD GROUND ROD 28503800001 5/8 11 GROUND ROD CLAMP 28504700025 SMALL HOTLINE CLAMP 28504700027 WRS 152 STIRRUP 28504700079 1/0 LOADBREAK ELBOW 28508200001 1/0 POLE TYPE TERMINATOR 28508200003 URD BUSHING INSERT 28509500006 COMBINATION HANGER POLE 28504700019 STANDOFF POLE TYPE 28504700022 25 KVA PADMOUNT 120/240 28508600031 1/0 URD AL. PRIMARY 28008000001 #6 H3 COPPER CONNECTOR 28502200002 TRANSFORMER GROUND LUG 28502200026 Ma rch 11,1994 WORK ORDER NO. TOTAL UNIT TOTAL QTY. COST $ COST $ ----------------------- 1 .67 .67 2 . 15 .30 3 15.54 46.62 6 25. 15 150.90 2 .44 .88 3 6.00 18.00 3 1. 74 5.22 2 .29 .58 1 26.40 26.40 1 39.77 39.77 4 8.33 33.32 4 .72 2.88 1 6.01 6.01 1 4 .36 4.36 7 45.00 315.00 1 24.98 24.98 6 17.99 107.94 1 5 . 16 5. 16 3 8.44 25.32 3 826.77 2480.31 1.525 1189.00 1813.23 2 .50 1.00 3 1.30 3.90 --------- 5112.74 .... McCord Engineering, Inc. March 11, 1994 WORK ORDER NO. CS-TSD-6-S.5 LETTER CODE ------------ UD#1/0 URD UG7-25 UM6-1 UM6-6 UJ2-6-B UJ2-6-I UA3 CITY OF COLLEGE STATION SOUTHWOOD FOREST PHASE 5 PROJECT COST ESTIMATE ASSEMBLY DESCRIPTION -------------------------------- 1/0 PRIMARY URD CABLE UG 25 KVA 1 PHASE LOOP FEED LOAD BREAK ELBOW GROUND ROD ASSEMBLY BARE SECONDARY CONNECTOR BLOCK INSULATED SECONDARY CONNECTOR BL UG 1 PHASE TERMINAL POLE QTY ------ 1.525 3 7 4 3 6 1 COST ($) PER 1 ASSEMBLY ------------------------- LABOR MAT. TOTAL --------------------- 1050.00 1189.00 2239.00 256.00 871.79 1127.79 65.00 45.00 110.00 8.00 9.05 17.05 15.00 15.54 30.54 15.00 25. 15 40.15 112.00 135 .43 247.43 TOTAL LABOR = TOTAL MATERIAL = TOTAL = LABOR OVERHEAD 30% = MATERIAL HAND LI NG 7% = TOTAL ENGINEERING & OVERHEAD 8.5% = GRAND TOTAL ROUNDED TO DEVELOPERS CONTRIBUTION 20% = TOTAL COST $ --------- 3414.48 3383.37 770.00 68.20 91.62 240.90 247.43 --------- 8215.99 3103.25 5112.74 8215.99 930.98 357.89 ----------9504.86 807.91 ---------- 10312.77 $10,313.00 ----------$2,062.60 Drainage Report For Southwood Forest Phase 5 5.00 Acres Crawford Burnett League College Station, Brazos County, Texas Prepared For: William D. Fitch College Station, Texas Prepared By: Municipal Development Group 203 Holleman Drive East College Station, Tx 77840 (409) 693-5359 May 1994 Approved By: North Bardell, P.E. / Southwood Forest Phase 5 General Location The tract to be developed is located on the southwest comer of Rock Prairie Road and Rio Grande Boulevard. Lots 1-7, Block 1, and Lot I, Block 2 of Southwood Forest comprises this property. Property Description This tract is a total of 5 . 00 acres. The entire area is currently unimproved. Current development will be restricted to Lots 1-7, Block 1, which will be developed for single-family residential use. Lot 1, Block 2 is zoned CN and will be reserved for future commercial improvement. Primary Drainage Basin Description The residential tract drains at a slope of 2 .5% to the northeast into an existing earth channel along Rio Grande Boulevard. The future commercial tract drains at a slope of 1.5% to the east onto Rock Prairie Road and then drains into an existing recessed curb inlet which also drains into the existing earth channel. This project does not propose significant changes to these patterns. The tract does not lie in the floodplain or floodway according to FEMA-FIRM Maps 48041COl82C (July 2, 1992}. Drainage Facility Design The existing earth channel along Rio Grande Boulevard will be realigned and reconstructed to match the channel downstream . · No site-specific flooding problems have been noted in the existing patterns . The total impervious area added during this project is 1.14 acres and will result in an additional 7.9 c.fs. for the 100-year storm . A rectangular notched weir will be constructed 400 feet downstream,· which will provide adequate capacity in the channel section and meter the additional runoff. The weir opening will extend 2.5' from the existing concrete wall (see detail). The equation used to determine the flow through the weir was: Q.,.;, • C.., [W -0 .2(H)]H 15 Where : Q wtr • FWw through the Weir Cw· Weir Coefficient (Uud 2 .89) W • Width of Opening H • Height of Ponded Water . The volume of the drainage ditch that will be utilized for this tract is 12155 c.f, which will sufficiently detain the excess runoff. Future Usage of Site At some time in the future , Lot 1, Block 2 will be utilized for commercial development. At the same time, drainage facilities will be designed for that tract, per City of College Station Drainage Standards . DRAINAGE Rational Method (Q = CIA) Block 1 Lots 1-7 Pre-Development Area DescriQtion {acres} Q C(area} Grassland 3.06 0.35 1.071 Post-Development Area DescriQtion {acres} Q C(area} Landscaping 1.92 0.35 0.672 Impervious *NOTE: Houses assumed to be Area 1.14 0.90 1.026 3500 sq . ft . apiece, to 3.-06 1.698 match existing homes in South Wood Forest. Cavg = 1.698 . I 3.06 = 0 .55 Runoff Req'd Storage Frequency Intensity* Cpre Cpost Qpre Qpost Vpre Vpost Volume {years} (in/in} (cfs) (cfsl .cg:}. .cg:}. .cg:}. 100 9.1 0.35 0 .55 9.75 15.45 15789 25032 9243 50 8 .1 0 .35 0 .55 8.68 13 .75 14054 22281 8227 25 7 .5 0.35 0.55 8.03 12.74 13013 20631 7618 10 6.3 0.35 0 .55 6 .75 10.70 10931 17330 6399 5 5.8 0.35 0.55 6 .21 9.85 10063 15954 5891 *NOTE : Tc= 18 min 16 14 12 ~10 en ~ 8 . (.) ._. 0 6 4 2 0 0 Hydrograph* 1 00 Year Storm ·-·-·-· ~Qp_re~·-·-····-············-· ·-·-·-·--······--·-·-·····················-·-····· ····················:·· ····· ·--·-····-····-······---··R~-q~~~i ·o~t~;;ti~~·······-····-·-·-·······--·· ·-·-·-····· ····--······················· ········-·-····-.;,,. -··-········-·-·-··········-···-····-··· ···--·-········--· 9243 c .f. / -, / "" / ,_ " ·-·-················-···-·············· ····-···············-·-...t-----·-········-·-·-···············--::.~ ......... -····-········ . ······-···~·········-··················-·-··························-···············-····-···············-····--·················· // ........... ""' ·---·-····-·---....... ·-·---/~~~---·-·-... ··--·-····-···-·--···-·-·--·--.. -=~-~~~2 ."-~~.J 15 7 89 c. f [ ............. ------··--··· //// .............................. ~ / ', ' ---·-··· .. ······· ·-·-·-··/.L········-·-·-·-············-·-·-·-·-·····-·····-·-·-·-··--·-·-·-······-·-·--·-·········-----····-·····-······-------·····-----·····--·---:-::i....,----·--·····--··~,-----·-····-···-······---·-·-······-·····-·-·---·---··-······--· / ......... ' / ..... ' / ' ' / ' ' ·-·-·-// .. _ ··-· ........ ·-····-···· ............. ---· .. .. -·-··· ... ·--·· ····-.... ····--····-·-· .... ·-·--·-·--····· .. .. ·····-·-·-····-·-·-·-·--· ...... >."'-,:::::_':::....~--. . ... ·-·--·-·-· ........ . / ' ' / '~ / ........ ~ 10 20 30 40 50 60 Tc= Time of Concentration (min.) *Block 1, Lots 1-7 Block 2 Lot 1 Pre-Development Area QescriQtion <acres) .Q C(area) Grassland 1.94 0.35 0.679 Post-Development Area DescriQtion (acres) .Q C(area} _Landscaping 1.10 0.35 0.385 *NOTE: Assume landscaping not Impervious to be less than 1.1 acres . Area 0.84 0.90 0.756 1.94 1.141 Cavg = 1.1 41 '/ 1.94 = 0.59 Runoff Req'd Storage Frequency Intensity* Cpre Cpost Qpre Qpost Vpre Vpost Volume (years) (in/in) Ccfs) (cfs) @ @ @ 100 9 .1 0 .35 0.59 6 .18 10.38 10010 16821 6811 50 8 .1 0.35 0 .59 5.50 9 .24 8910 14972 6062 25 7 .5 0 .35 0.59 5.09 8.56 8250 13863 5613 10 6 .3 0.35 0.59 4 .28 7.19 6930 11645 4715 5 5 .8 0.35 0.59 3 .94 6 .62 6380 10721 4341 *NOTE : Tc= 18 min 12 10 .-. 8 . fl) ~ 6 . () .._.... 0 4 2 0 0 Hydrograph * 1 00 Year Storm ' ' ·······Qpost ·············· ···· ········~~· · ---- ·--·-············-·--·-·-············-·-·-·-············ ····-·················-·-·-·-···············-·-·---S.: .......... --.-···-·····--·-·-··················-·--·-r----------. Qpre '',, Required Detention ·--.. _ ~~ '<::.: ................. ~ 6811 c.f / ......... ' / ............ ........ ........ ___ _. .................. --7/~~............ ... . ....................... ~.~~':_::o,,_,_:c-:::_· -.. . .. ·---· ........ . 1001 0 c. f. .......... .. .............. . // -,_, ;. "'- / .................. . ' / --' -----···· ····---7.('.·····-.--·············--············-····----··················-··················-·-·-·-···············--·-·-·-········-···-·-----············-·--·-·-·-··-·····~:':'::::.""""---·········-~---··············-----·-······-····-·-····-·-········· // -,-........ ' / -~ / _, / -~ 10 20 30 40 50 60 Tc= Time of Concentration (min.) *For Block 2, Lot 1 Both Blocks. (1 & 2). Pre-Development Area Description (acr~s) Q C(area) Grassland 5.00 0.35 1.750 Post-Development Area Description (acres) Q CCarea) Landscaping 2.67 0.35 0.934 Impervious Area 2.33 0.90 2.097 5.00 3.032 Cavg = 3.032 I 5.00 = 0.61 Runoff Req'd Storage Frequency Intensity* Cpre Cpost Qpre Qpost Vpre Vpost Volume Cvears) Cin/in) ---.(gfil (cfS) .@ .@ .@ 100 9.1 0.35 0.61 15.93 27.59 25799 44690 18892 50 8.1 0.35 0.61 14.18 24.56 22964 39779 16816 25 7.5 0.35 0.61 13.13 22.74 21263 36833 15570 10 6.3 0.35 0.61 11.03 19.10 17860 30939 13079 5 5.8 0.35 0.61 10.15 17.58 16443 28484 12041 *NOTE: Tc= 18 min Hydrograph* 100 Year Storm 30 ~~~~~~~~~~~~~~ 25 ·-·-·-· Qpost ' -·····-·····--·--· ·-·····-·-·---·~.;:;······---·-·-··-········-·-·-·-·-·····-· . -·-·-·-······-····-·-·-·-·-············-·-··················---·-·-·-·--···· '' 44690 c.f. '-, ,;• ~ 2 0 ····--·····QP~~-··-············· ···-----·······--···-··-··-·····-··--·-········ -~ ··-··········· ··-·--· Required Detention ········· ~ 15 _ _ _ __ _7 -"-,cc_-:_:-_ _ j-, ~--'---1 _88_9_2 _c.f_. _ ___. / -..... ,, '~ 0 10 ····-·····················-;-/--·-·-·---··-----------::::::~,<=__:==-~ --- / --' 5 ·-·········· ··/··········· ··--················· ----·· ······················· ·-·-.. -··· ---····················-·-············-····················--·--·-·····~~:::······-':,~············-·······-············-····-····-········ /// --..... -.:::.~ v ~ 0 ---+---+--+--+---+--+--+--+--+--+-~----j 0 10 20 30 40 50 60 Tc= Time of Concentration (min.) *For Blocks 1 & 2 Routilg 100 Year Ditch Ditch Block 1 Block 1 Block2 RCP Outflow Outflow Tu~ ~ ~ .Q ~ Qru!fil y_ Vtotal A total .t!. ~ ds/cjt Vstorage Astorage Hstorage 0 0.00 0.00 0.00 0.00 0.00 0.00 0.0 0.0 0.00 0.00 0.00 0.0 0.0 0.00 0.00 2 1.08 1.72 0.69 0.59 2.36 3.00 179.8 179.8 0.28 0.27 0.98 1.0 121.1 0.19 0.22 4 2.17 3.43 ' 1.37 1.19 4.73 5.99 539.4 660.5 1.02 0.51 2.54 3.7 449.2 0.69 0.42 6 3.25 5.15 2.06 1.76 7.09 8.99 899.0 1348.2 2.07 0.73 4.26 7.6 939.7 1.45 0.61 8 4.33 6.87 2.75 2.37 9.45 11.99 1256.6 2198.3 3.36 0.94 6.05 13.2 1579.7 2.43 0.79 10 5.42 6.56 3.43 2.97 11.62 14.96 1616.2 3197.9 4.92 1.13 7.66 19.7 2362.5 3.63 0.97 12 6.50 10.30 4.12 3.56 1'4.16 17.96 1977.8 4340.3 6.68 1.31 9.74 27.4 3263.2 5.05 1.14 1'4 7.58 12.02 4.81 4.15 16.54 20.96 2337.4 5620.6 8.65 1.50 11.63 36.2 4338.1 6.67 1.31 16 8.67 13.73 5.49 4.75 16.91 23.97 2697.0 7035.1 10.62 1.67 13.54 46.0 5524.4 8.50 1.48 18 9.75 15.45 6.16 5.34 21.27 26.97 3056.6 8581.0 13.20 1.65 15.47 57.0 6640.2 10.52 1.65 20 9.21 14.59 5.64 5.04 20.09 '25.47 3146.5 9966.7 15.36 1.99 1°7.09 66.9 6033.1 12.36 1.79 22 6.67 13.73 5.49 4.75 18.91 23.97 2966.7 10999.8 16.92 2.09 16.21 74.0 6861.7 13.66 1.88 24 8.13 12.86 5.15 4.45 17.73 22.48 2786.9 11668.6 17.95 2.15 18.92 76.7 9441.3 '14.53 1.94 26 7.56 12.02 4.81 4.15 16.54 20.98 2607.1 12046.4 18.54 2.19 19.31 81.3 9754.8 15.01 1.97 28 7.04 11.16 4.46 3.86 15.36 19.46 2427.3 12182.1 16.74 2.20 19.45 82.1 9656.6 15.16 1.98 30 6.50 10.30 4.12 3.56 14.18 17.96 2247.5 12104.1 18.62 2.19 19.37 81.5 9775.2 15.04 1.97 32 5.96 9.44 3.78 3.26 13.00 16.46 2067.7 11842.9 18.22 2.17 19.10 79.5 9534.9 14.67 1.95 34 5.42 8.58 3.43 2.97 11.62 14.96 1867.9 11422.8 17.57 2.13 18.66 76.3 9157.6 14.09 1.91 38 4.86 7.73 3.09 2.67 10.63 13.49 1706.1 '10865.7 16.72 2.06 18.06 72.2 8662.5 13..33 1.86 38 4.33 6.67 2.75 2.37 9.45 11.99 1528.3 10190.8 15.66 2.01 17.32 67.2 8067.6 12.41 1.79 '40 3.79 6.01 2.40 2.06 8.27 10.49 1348.5 9416.3 14.49 1.94 16.45 61.6 7390.2 11.37 1.71 42 3.25 5.15 2.06 1.78 7.09 6.99 1166.7 6556.9 13.17 1.65 15.44 55.4 6645.7 10.22 1.63 44 2.71 4.29 1.72 1.46 5.91 7.49 986.9 7634.6 11.75 1.74 14.31 46.7 5849.6 9.00 1.53 46 2.17 3.43 1.37 1.19 4.73 5.99 809.1 6658.7 10.24 1.63 13.05 41.8 5017.0 7.72 1.41 48 1.63 2.56 1.03 0.69 3.54 4.50 629.3 5646.3 6.69 1.50 11.67 34.7 4163.0 6.40 1.29 50 1.08 1.72 0.69 0.59 2.36 3.00 449.5 4612.5 7.10 1.35 10.16 27.5 3302.7 5.06 1.15 52 0.54 0.66 0.34 0.30 1.18' 1.50 269.7 3572.4 5.50 1.19 8.51 20.4 2452.3 3.77 0.99 54 0.00 0.00 0.00 0.00 0.00 0.00 89.9 2542.2 3.91 1.01 6.70 13.6 1629.5 2.51 0.81 56 0.00 0.00 0.0 1629.5 2.51 0.61 4.68 7.8 934.2 1.44 0.61 58 0.00 0.00 0.0 934.2 1.44 0.61 3.27 3.7 444.8 0.68 0.42 60 0.00 0.00 0.0 444.8 0.68 0.42 1.91 1.1 13'4.1 0.21 0.23 25 20 -~ ~15 0 10 0 Hydrograph for Ditch Section 1 00 Year Storm 10 20 30 40 50 Time (min) ---Qpre -.-Qpost • Qweir 60 .. 50Year Ditch Ditch Block 1 Block 1 Block2 RCP Outflow Outflow Tu Qm QQ.Q§! QR@ Q QR@ QQ.Q§! y Vtotal A total t! Qweir ds/dt Ystorage Astorage Hstorage 0 0.00 0.00 0.00 0.00 0.00 0.00 0.0 0.0 0.00 0.00 0.00 0.0 0.0 0.00 0.00 2 0.96 1.53 0.61 0.53 2.10 2.67 159.9 159.9 0.25 0.25 0.90 0.9 106.1 0.16 0.21 4 1.93 3.06 1.22 1.05 4.20 5.33 479.6 565.9 0.90 0.46 2.33 3.3 392.2 0.60 0.40 6 2.69 4.56 1.63 1.56 6.31 8.00 799.7 1191.9 1.83 0.69 3.90 6.6 617.9 1.26 0.57 8 3.86 6.11 2.44 2.11 6.41 10.66 1119.5 1937.5 2.98 0.88 5.53 11.4 1371.7 2.11 0.74 10 4.82 7.64 3.06 2.63 10.51 13.33 1439.4 2611.1 4.32 1.06 7.19 17.1 2047.8 3.15 0.90 12 5.79 9.17 3.67 3.16 12.61 15.99 1759.3 3607.0 5.66 1.23 8.90 23.7 2841.7 4.37 1.06 14 6.75 10.69 4.28 3.69 14.72 18.66 2079.1 4920.8 7.57 1.40 10.62 31.2 3749.8 .5.77 1.22 16 7.72 12.22 4.89 421 16.82 21.32 2399.0 6148.8 9.46 1.56 12.37 39.7 4769.4 7.34 1.38 16 8.66 13.75 5.50 4.74 18.92 23.99 2718.9 7486.3 11.52 1.73 14.12 49.2 5698.8 9.08 1.53 20 8.20 12.99 5.19 4.48 17.87 22.66 2798.8 6697.6 13.36 1.86 15.61 57.6 6913.6 10.64 1.66 22 7.72 12.22 4.89 4.21 16.62 21.32 2638.9 9552.7 14.70 1.95 16.60 63.5 7620.1 11.72 1.74 24 7.23 11.46 4.56 3.95 15.77 19.99 2479.0 10099.1 15.54 2.00 17.22 67.2 6069.7 12.41 1.79 26 6.75 10.69 4.26 3.69 14.72 18.66 2319.0 10366.6 15.98 2.03 17.54 69.2 6303.1 12.77 1.82 26 6.27 9.93 3.97 3.42 13.66 17.33 2159.1 10462.2 16.10 2.04 17.62 69.6 8352.4 12.85 1.62 30 5.79 9.17 3.67 3.16 12.61 15.99 1999.2 10351.6 15.93 2.03 17.50 66.7 8244.3 12.68 1.81 32 5.30 8.40 3.36 2.90 11.56 14.66 1839.2 10083.5 15.51 2.00 17.20 66.7 8001.4 12.31 1.76 34 4.82 7.64 3.06 2.63 10.51 13.33 1679.3 9680.7 14.89 1.96 16.75 63.7 7643.6 11.76 1.74 36 4.34 6.67 2.75 2.37 9.46 12.00 1519.4 9163.0 14.10 1.91 16.15 59.9 7188.8 11.06 1.69 38 3.86 6.11 2.44 2.11 6.41 10.66 1359.4 6548.3 13.15 1.64 15.43 55.4 6653.4 10.24 1.63 40 3.36 5.35 2.14 1.84 7.36 9.33 1199.5 7852.9 12.08 1.77 14.58 50.4 6052.3 9.31 1.55 42 2.89 4.56 1.83 1.58 6.31 8.00 1039.6 7091.9 10.91 1.68 13.62 45.0 5399.9 8.31 1.47 44 2.41 3.82 1.53 1.32 5.26 6.66 879.6 6279.6 9.66 1.56 12.54 39.2 4709.6 7.25 1.37 46 1.93 3.06 1.22 1.05 4.20 5.33 719.7 5429.5 6.35 1.47 11.36 33.3 3995.1 6.15 1.26 48 1.45 2.29 0.92 0.79 3.15 4.00 559.8 4554.8 7.01 1.35 10.07 27.2 3268.6 5.03 1.14 50 0.96 1.53 0.61 0.53 2.10 2.67 399.8 3668.6 5.64 1.21 8.67 21.2 2544.2 3.91 1.01 52 0.46 0.76 0.31 0.26 1.05 1.33 239.9 2784.1 4.28 1.05 ·7.15 15.3 1635.2 2.82 0.65 54 0.00 0.00 0.00 0.00 0.00 0.00 80.0 1915.2 2.95 0.87 5.46 9.6 1157.5 1.78 0.66 56 0.00 0.00 0.0 1157.5 1.76 0.68 3.82 5.0 599.3 0.92 0.49 58 0.00 0.00 0.0 599.3 0.92 0.49 2.37 1.9 227.9 0.35 0.30 60 0.00 0.00 0.0 227.9 0.35 0.30 1.17 0.1 15.8 0.02 0.08 Hydrograph for Ditch Section 50 Year Storm 25 ~~~~~~~~~~~~~~~~~~ 2 0 ------------·---·--·-· --------·-·-----·----·-----·--------· ~~---------·----··-······--··------···-·-·-··--· --·---------··-·--------------------------·--·--··· ------------·-·-··------·-·-·-·-·-------- 010 0 10 20 30 40 50 60 Time (min) -m-Qpre __._.. Qpost ---Qweir 25 Year Ditch Ditch Block 1 Block 1 Block 2 RCP Outflow Outflow Tu~ QRQfil ~ Q ~ QRQfil Y. Vtotal Atotal .!::f Qweir dsldt Vstorage Astorage Hstorage 0 0.00 0.00 0.00 0.00 0.00 0.00 0.0 0.0 0.00 0.00 0.00 0.0 0.0 0.00 0.00 2 0.89 1.42 0.57 0.49 1.95 2.47 148.1 148.1 0.23 0.24 0.85 0.8 97.3 0.15 0.20 4 1.78 2.83 1.13 0.98 3.89 4.94 444.4 541.7 0.83 0.46 2.20 3.0 358.8 0.55 0.38 6 2.68 4.25 1.70 1.46 5.84 7.41 740.7 1099.4 1.69 0.66 3.68 6.2 746.5 1.15 0.55 8 3.57 5.66 2.26 1.95 7.78 9.88 1036.9 1783.4 2.74 0.84 5.21 10.4 1249.9 1.92 0.71 10 4.46 7.08 2.83 2.44 9.73 12.34 1333.2 2583.1 3.97 1.01 6.78 15.5 1863.8 2.87 0.86 12 5.35 8.49 3.39 2.93 11.67 14.81 1629.5 3493.3 5.37 1.18 8.38 21.5 2583.9 3.98 1.01 14 6.25 9.91 3.96 3.41 13.62 17.28 1925.7 4509.7 .6 .. 94 1.34 10.00 28.4 3406.8 5.24 1.16 16 7.14 11.32 4.52 3.90 15.56 19.75 2222.0 5628.8 8.66 1.50 11.65 36.1 4329.9 6.66 1.31 18 8.03 12.74 5.09 4.39 17.51 22.22 2518.3 6848.2 10.54 1.65 13.30 44.6 5351.4 8.23 1.46 20 7.58 12.03 4.81 4.15 16.54 20.99 2592.3 7943.7 12.22 1.78 14.69 52.2 6264.0 9.64 1.58 22 7.14 11.32 4.52 3.90 15.56 19.75 2444.2 8708.2 13.40 1.86 15.62 57.4 6889.5 10.60 1.66 24 6.69 10.62 4.24 3.66 14.59 18.52 2296.1 9185.6 14.13 1.91 16.18 60.6 7277.6 11.20 1.70 26 6.25 9.91 3.96 3.41 13.62 17.28 2147.9 9425.6 14.50 1.94 16.46 62.2 7467.4 11.49 1.72 28 5.80 9.20 3.68 3.17 12.65 16.05 1999.8 9467.2 14.56 1.94 16.50 62.4 7489.4 11.52 1.73 30 5.35 8.49 3.39 2.93 11.67 14.81 1851.7 9341.1 14.37 1.93 16.36 61.4 7369.2 11.34 1.71 32 4.91 7.79 3.11 2.68 10.70 13.58 1703.5 9072.8 13.96 1.90 16.05 59.4 7128.3 10.97 1.68 34 4.46 7.08 2.83 2.44 9.73 12.34 1555.4 8683.7 13.36 1.86 15.59 56.5 6785.4 10.44 1.64 36 4.02 6.37 2.55 2.20 8.76 11.11 1407.3 8192.7 12.60 1.81 15.00 53.0 6357.4 9.78 1.59 38 3.57 5.66 2.26 1.95 7.78 9.88 1259.1 7616.5 11.72 1.74 14.29 48.8 5859.4 9.01 1.53 40 3.12 4.95 1.98 1.71 6.81 8.64 1111.0 6970.4 10.72 1.67 13.46 44.2 5305.6 8.16 1.45 42 2.68 4.25 1.70 1.46 5.84 7.41 962.9 6268.5 9.64 1.58 12.53 39.2 4709.0 7.24 1.37 44 2.23 3.54 1.41 1.22 4.86 6.17 814.7 5523.8 8.50. 1.48 11.50 34.0 4082.2 6.28 1.27 46 1.78 2.83 1.13 0.98 3.89 4.94 666.6 4748.8 7.31 1.37 10.37 28.6 3437.0 5.29 1.17 48 1.34 2.12 0.85 0.73 2.92 3.70 518.5 3955.5 6.09 1.25 9.13 23.2 2785.5 4.29 1.05 50 0.89 1.42 0.57 0.49 1.95 2.47 370.3 3155.9 4.86 1.12 7.80 17.8 2139.6 3.29 0.92 52 0.45 0.71 0.28 0.24 0.97 1.23 222.2 2361.8 3.63 0.97 6.36 12.6 1511.8 2.33 0.78 54 0.00 -0.00 0.00 0.00 0.00 0.00 74.1 1585.9 2.44 0.79 4.79 7.6 916.7 1.41 0.60 56 0.00 0.00 0.0 916.7 1.41 0.60 3.23 3.6 435.6 0.67 0.42 58 0.00 0.00 0.0 435.6 0.67 0.42 1.88 1.1 129.3 0.20 0.23 60 0.00 0.00 0.0 129.3 0.20 0.23 0.77 -0.2 0.0 0.00 0.00 Hydrograph for Ditch Section 25 Year Storm 2 0 ·-·-···············-····-·-···············-·-·-·-···············-·-··-········-·-·-·-······· ·-·-·-·-··················-···-············-·-----·····································--·-··························--·-····-·········--···-·-···············---·····--·············- ~ 15 0 .._ 010 5 0 10 20 30 40 50 60 Time {min) ---Qpre __._ Qpost • Qweir Crawford Burnett League College Station, Brazos County, Texas Prepared For: William D. Fitch College Station, Texas Prepared By: Municipal Development Group 203 Holleman Drive East College Station, Tx 77840 (409) 693-5359 May 1994 Approv ed By : North Bardell, P .E. TO MUNICIPAL DEVELOPMENT GROUP P.O. Box 9249 203 Holleman Drive East College Station, Texas 77840-9249 (409) 693-5359 ~\ J?-\&.'! \./ tJY°'t-- WE ARE SENDING YOU O Attached O Under separate cover via _________ the following items: COPIES o/ 0 Shop drawings 0 Copy of letter DATE s /w; - NO . 0 Prints 0 Plans 0 Samples O Specifications O Change order DESCRIPTION ~.Ni4t..r-~. 4 -~.:.:'\"":. I THESE ARE TRANSMITTED as checked below : 13""For approval 0 For your use 0 As requested O Approved as submitted O Approved as noted 0 Returned for corrections 0 Resubmit __ copies ' for approval O Submit __ copies for distribution O Return __ corrected prints 0 For review and comment 0 ------------------------- 0 FOR BIDS DUE _________ 19 ___ 0 PRINTS RETURNED AFTER LOAN TO US REMARKS--------------------------------------- SIGNED:~~~ ,, .....,,.. ., ............ ~ .... ,,, f .. :..:.. ~ COPY TO :'k'i;'ft' Southwood Forest Phase 5 General Location The tract to be developed is located on the southwest corner of Rock Prairie Road and Rio Grande Boulevard. Lots 1-7, Block 1, and Lot 1, Block 2 of Southwood Forest comprises this property . Property Description This tract is a total of 5.00 acres . The entire area is currently unimproved . Current development will be restricted to Lots 1-7, Block 1, which will be developed for single-family residential use. Lot 1, Block 2 is zoned CN and will be reserved for future commercial improvement. Primary Drainage Basin Description The residential tract drains at a slope of 2 . 5% to the northeast into an existing earth channel along Rio Grande Boulevard . The future comm.ercial tract drains at a slope of 1.5% to the east onto Rock Prairie Road and then drains into an existing recessed curb inlet which also drains into the existing earth channel. This project does not propose significant changes to these patterns. The tract does not lie in the floodplain or floodway according to FEMA-FIRM Maps 48041C0182C (July 2, 1992). Drainage Facility Design The existing earth channel along Rio Grande Boulevard will be realigned and reconstructed to match the channel downstream . No site-specific flooding problems have been noted in the existing patterns . The total impervious area added during this project is 1.14 acres and will result in an additional 7 .9 c .f.s . for the I 00-year storm. To manage the additional runoff, a rectangular notched weir will be constructed 400 feet downstream . This will sufficiently detain the runoff from the residential tract. The weir will extend 2 . 7' from the existing concrete wall. Future Usage of Site At some time in the future, Lot I, Block 2 will be utilized for commercial development. At the same time, drainage facilities will be designed for that tract. AINAGE Rational Method (Q = CIA) Block 1 Lots 1-7 Pre-Development Area Description (acres) Grassland 3.06 Post-Development Runoff Description Landscaping Impervious Area Cavg = Frequency (years) 100 50 25 10 5 Area (acres) 1.92 1.14 3.06 1.698 Intensity* (in/in) 12.6 11.1 9.9 8.6 7.7 I ~ 0.35 ~ 0.35 0.90 3.06 Cpre 0.35 0.35 0.35 0.35 0 .35 = CC areal 1.071 C(area} 0.672 1.026 1.698 0.55 Cpost 0.55 0.55 -0.55 0.55 0.55 *NOTE: Tc= 10 min *NOTE: Houses assumed to be 3500 sq . ft . apiece , to match existing homes in South Wood Forest . Req'd Storage Qpre Qpost Vpre Vpost Volume (cfs) Ccfs) {2Il {£!} {£!} 13.49 21.39 12145 19255 7110 11 .89 18.85 10699 16963 6264 10.60 16.81 9543 15129 5587 9.21 14.60 8290 13143 4853 8.25 13.07 7422 11767 4345 lock2 Lot 1 Pre-Development Area Descri12tion (acres) ~ C(area} Grassland 1.94 0.35 0.679 Post-Development Area Descri12tion (acres) ~ C(area} Landscaping 1.10 0.35 0.385 •NOTE: Assume landscaping not Impervious to be less than 1.1 acres . Area 0.84 0.90 0.756 1.94 1.141 Cavg = 1.141 I 1.94 = 0.59 Runoff Req'd Storage Frequency Intensity* Cpre Cpost Qpre Qpost Vpre Vpost Volume (years} (in/in} (cfs} (cfs} {£!} {£!} {£!} 100 12.6 0.35 0.59 8.56 14.38 7700 12939 5239 50 11 .1 0.35 0.59 7.54 12.67 6783 11399 4615 25 9.9 0.35 0.59 6 .72 11 .30 6050 10166 4116 10 8.6 0.35 0.59 5.84 9.81 5255 8831 3576 5 7.7 0.35 0.59 5 .23 8 .79 4705 7907 3202 "NOTE: Tc• 10 min Both Blocks (1 & 2) Pre-Development Area Description (acres) . ~ C{area} Grassland 5 .00 0.35 1.750 Post-Development Area Description (acres} ~ C{area} Landscaping 2.67 0.35 0.934 Impervious Area 2.33 0 .90 2 .097 5.00 3.032 Cavg = 3 .032 I 5.00 = 0.61 Runoff Req'd Storage Frequency Intensity* Cpre Cpost Qpre Qpost Vpre Vpost Volume {years) {in/in} {cfs} {cfs) {2D. {2D. {2D. 100 12.6 0.35 0.61 22.05 38.20 19845 34377 14532 50 11.1 0.35 0 .61 19.43 33.65 17482 30285 12802 25 9.9 0.35 0.61 17.33 30.01 15593 27011 11418 10 8.6 0.35 0.61 15.05 26.07 13545 23464 9919 5 7 .7 0 .35 0.61 13.48 23.34 12128 21008 8881 *NOTE : Tc• 10 min 2 0 ·--·-···· Qpost -····· ·· -; 15 ~ (.) .............. a 10 5 0 5 Hydrograph* 100 Year Storm J 19255 c.f J ......... -·-·····m·-··-mm ______ .............. . 10 15 Required Detention 7110 c.f. ~---~ 20 25 ·-----·--···········- 30 Tc= Time of Concentration (min .) *Block 1 , Lots 1-7 Hydrograph* 1 00 Year Storm 16 -r--~~~~~~~~~~~~~ 14 ········-·-····-··············-·--·············--·-·-··············-·-·-··········-·-·-·-··········· 1 2 •-•-·-•m-••••~~-~-~-·-·-·••·•-••••••••••m• •mHH•-••••m•H•mm••-•••---•• H••m•• ....... J 12 9 3 9 c 0 f. ! .............. • -·•·-...... •••-•• •·--•-•----••• .. . ~ 1 0 ·-·-----····· Qpre -·-······· -·-·-·-········---·-·-···········-·-·-·-···-···-·-····-·-······--·-·-···············----Required Detention ----· ~ 8 5239 c .f. ._. 0 6 -·--· -------·-··-· 4 2 0 ---+-~+----J---+~-+--+~-+--i-~+----1----ic.__~ 0 5 10 15 20 25 30 Tc= Time of Concentration (min.) *For Block 2, Lot 1 40 Qpost 30 ............ Qpre "' 'j 20 ............ 0 10 0 5 Hydrograph* 1 00 Year Storm 34377 c.f. 10 15 Required Detention 14532 c .f. 20 25 Tc= Time of Concentration (min.) 30 *F or Blocks 1 & 2 Routing 100 Year Ditch Ditch Block 1 Block 1 Block 2 RCP Outflow Outflow Tc~ Qpost Qpre .Q Qpre .QQQfil Y.. Vtotal Atotal ti Qwejr ds/dt Vstorage Astorage Hstorage 0 0.00 0.00 0.00 0.00 0.0 0.0 0.00 0.00 0.00 0.0 0.0 0.00 0.00 2 2.70 4.28 2.70 4.28 256.7 256.7 0.39 0.32 1.38 1.5 174.1 0.27 0.26 4 5.40 8.56 5.40 8.56 770.0 944.1 1.45 0.61 3.57 5.4 647.0 1.00 0.51 6 8.09 12.83 8.09 12.83 1283.4 1930.4 2.97 0.88 5.99 11.3 1356.7 2.09 0.73 8 10.79 17.11 0.00 10.79 17.11 1796.8 3153.5 4.85 1.12 8.48 19.0 2285.1 3.52 0.95 10 13.49 21.39 1.74 0.00 15.23 23.13 2414.5 4699.7 7.23 1.37 11.22 29.3 3517.6 5.41 1.18 12 12.14 19.25 3.48 1.48 17.10 24.21 2840.5 6358.1 9.78 1.59 13.81 40.5 4856.5 7.47 1.39 14 10.79 17.11 5.22 2.96 18.97 25.29 2970.2 7826.7 12.04 1.76 15.90 50.4 6043.9 9.30 1.55 16 9.44 14.97 6.96 4.44 20.84 26.37 3099.9 9143.8 14.07 1.91 17.65 59.4 7130.3 10.97 1.68 18 8.09 12.83 8.70 5.92 22.71 27.45 3229.6 10359.9 15.94 2.03 19.18 67.9 8149.8 . 12.54 1.80 20 6.75 10.70 7.83 7.40 21.98 25.93 3202.7 11352.5 17.47 2.13 20.37 74.8 8979.2 13.81 1.89 22 5.40 8.56 6.96 6.66 19.02 22.18 2886.1 11865.2 18.25 2.17 20.97 78.2 9384.5 14.44 1.93 24 4.05 6.42 6.09 5.92 16.06 18.43 2436.2 11820.6 18.19 2.17 20.92 77.6 9307.1 14.32 1.92 26 2.70 4.28 5.22 5.18 13.10 14.68 1986.3 11293.4 17.37 2.12 20.30 73.5 8819.9 13.57 1.87 28 1.35 2.14 4.35 4.44 10.14 10.93 1536.4 10356.3 15.93 2.03 19.18 66.6 7987.4 12.29 1.78 30 0.00 0.00 3.48 3.70 ,7.18 7.18 1086.5 ' 9073.9 13.96 1.90 17.56 57.2 6869.5 10.57 1.65 32 2.61 2.96 5.57 5.57 765.0 7634.5 11.75 1.74 15.64 47.0 5642.3 8.68 1.50 34 1.74 2.22 3.96 3.96 571.8 6214.1 9.56 1.57 13.60 37.2 4460.0 6.86 1.33 36 0.87 1.48 2.35 2.35 378.6 4838.6 7.44 1.39 11.44 27.8 3336.2 5.13 1.15 38 0.00 0.74 0.74 0.74 185.4 3521.6 5.42 1.18 9.17 19.0 2284.8 3.52 0.95 40 0.00 0.00 0.00 44.4 2329.2 3.58 0.96 6.85 11.4 1368.2 2.10 0.74 42 0.00 0.00 0.0 1368.2 2.10 0.74 4.68 5.6 676.9 1.04 0.52 44 0.00 0.00 0.0 676.9 1.04 0.52 2.81 1.9 0.0 0.00 0.00 46 0.00 0.00 0.0 0.0 0.00 0.00 0.00 0.5 0.0 0.00 0.00 48 0.00 0.00 0.0 0.0 0.00 0.00 0.00 0.5 0.0 0.00 0.00 50 0.00 0.00 0.0 0.0 0.00 0.00 0.00 0.5 0.0 0.00 0.00 52 0.00 0.00 0.0 0.0 0.00 0.00 0.00 0.5 0.0 0.00 0.00 54 0.00 0.00 0.0 0.0 0.00 0.00 0.00 0.5 0.0 0.00 0.00 56 0.00 0.00 0.0 0.0 0.00 0.00 0.00 0.5 0.0 0.00 0.00 58 0.00 0.00 0.0 0.0 0.00 0.00 0.00 0.5 0.0 0.00 0.00 60 0.00 0.00 0.0 0.0 0.00 0.00 0.00 0.5 0.0 0.00 0.00 50 Year Ditch Ditch Block 1 Block 1 Block 2 RCP Outflow Outflow Tc~ QQQfil QQ@ g ~ Qpost Y. Vtotal Atotal .!::! Qweir ds/dt Vstorage Astorage Hstorage 0 0.00 0.00 0.00 0.00 0.0 0.0 0.00 0.00 0.00 0.0 0.0 0.00 0.00 2 2.38 3.77 2.38 3.77 226.2 226.2 0.35 0.30 1.25 1.3 151.0 0.23 0.25 4 4.76 7.54 4.76 7.54 678.6 829.6 1.28 0.57 3.25 4.7 559.1 0.86 0.47 6 7.13 11.31 7.13 11.31 1131.0 1690.1 2.60 0.82 5.44 9.7 1168.2 1.80 0.68 8 9.51 15.08 0.00 9.51 15.08 1583.4 2751.6 4.23 1.05 7.71 16.4 1962.7 3.02 0.88 10 11.89 18.85 1.51 0.00 13.40 20.36 2126.3 4089.0 6.29 1.28 10.18 25.1 3015.8 4.64 1.10 12 10.70 16.97 3.02 1.30 15.02 21.28 2498.2 5514.0 8.48 1.48 12.53 34.6 4151.7 6.39 1.29 14 9.51 15.08 4.52 2.60 16.63 22.20 2608.7 6760.4 10.40 1.64 14.40 42.9 5144.9 7.92 1.43 16 8.32 13.20 6.03 3.89 18.25 23.12 2719.3 7864.1 12.10 1.77 15.95 50.4 6042.8 9.30 1.55 18 7.13 11.31 7.54 5.19 19.87 24.04 2829.8 8872.6 13.65 1.88 17.30 57.3 6877.2 10.58 1.65 20 5.95 9.43 6.79 6.49 19.22 22.70 2804.6 9681.7 14.89 1.96 18.34 62.9 7543.2 11.60 1.73 22 4.76 7.54 6.03 5.84 16.63 19.41 2526.8 10070.1 15.49 2.00 18.82 65.3 7840.2 12.06 1.77 24 3.57 5.66 5.28 5.19 14.04 16.13 2132.3 9972.5 15.34 1.99 18.70 64.3 7720.8 11.88 1.75 26 2.38 3.77 4.52 4.54 11.45 12.84 1737.7 9458.5 14.55 1.94 18.06 60.4 7252.9 11.16 1.70 28 1.19 1.89 3.77 3.89 8.85 9.55 1343.2 8596.1 13.22 1.85 16.94 54.1 6496.3 9.99 1.61 30 0.00 0.00 3.02 3.25 6.26 6.26 948.6 7444.9 11.45 1.72 15.38 45.9 5506.0 8.47 1.48 32 2.26 2.60 4.86 4.86 667.1 6173.2 9.50 1.57 13.53 37.0 4438.6 6.83 1.33 34 1.51 1.95 3.46 3.46 498.8 4937.4 7.60 1.40 11.61 28.6 3429.0 5.28 1.17 36 0.75 1.30 2.05 2.05 330.4 3759.4 5.78 1.22 9.60 20.7 2487.1 3.83 0.99 38 0.00 0.65 0.65 0.65 162.1 2649.1 4.08 1.03 7.50 13.5 1623.1 2.50 0.80 40 0.00 0.00 0.00 38.9 1662.0 2.56 0.81 5.38 7.4 889.2 1.37 0.59 42 0.00 0.00 0.0 889.2 1.37 0.59 3.42 3.0 0.0 0.00 0.00 44 0.00 0.00 0.0 0.0 0.00 0.00 0.00 1.3 0.0 0.00 0.00 46 0.00 0.00 0.0 0.0 0.00 0.00 0.00 1.3 0.0 0.00 0.00 48 0.00 0.00 0.0 0.0 0.00 0.00 0.00 1.3 0.0 0.00 0.00 50 0.00 0.00 0.0 0.0 0.00 0.00 0.00 1.3 0.0 0.00 0.00 52 0.00 0.00 0.0 0.0 0.00 0.00 0.00 1.3 0.0 0.00 0.00 54 0.00 0.00 0.0 0.0 '0.00 0.00 0.00 1.3 0.0 0.00 0.00 56 0.00 0.00 0.0 0.0 0.00 0.00 0.00 1.3 0.0 0.00 0.00 58 0.00 0.00 0.0 0.0 0.00 0.00 0.00 1.3 0.0 0.00 0.00 60 0.00 0.00 0.0 0.0 0.00 0.00 0.00 1.3 0.0 0.00 0.00 25 Year Ditch Ditch Block 1 Block 1 Block 2 RCP Outflow Outflow Tc~ Qpost Qpre g Qpre .QQQfil '1.. Vtotal Atotal .!:i Qweir ds/d! Vstorage Astorage Hstorage 0 0.00 0.00 0.00 0.00 0.0 0.0 0.00 0.00 0.00 0.0 0.0 0.00 0.00 2 2.12 3.36 2.12 3.36 201.7 201.7 0.31 0.28 1.15 1.1 132.6 0.20 0.23 4 4.24 6.72 4.24 6.72 605.2 737.8 1.14 0.54 2.99 4.1 489.4 0.75 0.44 6 6.36 10.09 6.36 10.09 1008.6 1498.0 2.30 0.77 4.99 8.5 1019.2 1.57 0.64 8 8.48 13.45 0.00 8.48 13.45 1412.0 2431.3 3.74 0.98 7.06 14.2 1708.3 2.63 0.82 10 10.60 16.81 1.34 0.00 11.94 18.15 1896.1 3604.5 5.55 1.20 9.32 21.8 2621.7 4.03 1.02 12 9.54 15.13 2.69 1.16 13.39 18.98 2227.7 4849.5 7.46 1.39 11.46 30.0 3602.5 5.54 1.20 14 8.48 13.45 4.03 2.32 14.83 19.80 2326.3 5928.8 9.12 1.54 13.17 37.1 4451.1 . 6.85 1.33 16 7.42 11.77 5.38 3.47 16.27 20.62 2424.8 6875.9 10.58 1.65 14.57 43.4 5211.9 8.02 1.44 18 6.36 10.09 6.72 4.63 17.71 21.44 2523.3 7735.2 11.90 1.75 15.78 49.3 5914.5 9.10 1.53 20 5.30 8.41 6.05 5.79 17.14 20.24 2500.9 8415.4 12.95 1.83 16.70 53.9 6466.7 9.95 1.60 22 4.24 6.72 5.38 5.21 14.83 17.31 2253.2 8720.0 13.42 1.86 17.10 55.8 6691.9 10.30 1.63 24 3.18 5.04 4.70 4.63 12.52 14.38 1901.4 8593.3 13.22 1.85 16.94 54.6 6551.0 10.08 1.61 26 2.12 3.36 4.03 4.05 10.21 11.45 1549.6 8100.5 12.46 1.80 16.28 50.9 6107.8 9.40 1.56 28 1.06 1.68 3.36 3.47 7.89 8.52 1197.7 7305.5 11.24 1.71 15.18 45.2 5418.2 8.34 1.47 30 0.00 0.00 2.69 2.90 5.58 5.58 845.9 6264.0 9.64 1.58 13.67 37.8 4533.0 6.97 1.34 32 2.02 2.32 4.33 4.33 594.9 5127.9 7.89 1.43 11.91 29.9 3592.9 5.53 1.20 34 1.34 1.74 3.08 3.08 444.8 4037.7 6.21 1.27 10.09 22.6 2717.4 4.18 1.04 36 0.67 1.16 1.83 1.83 294.7 3012.1 4.63 1.09 8.21 15.9 1913.7 2.94 0.87 38 0.00 0.58 0.58 0.58 144.5 2058.3 3.17 0.91 6.27 9.9 1189.3 1.83 0.69 40 0.00 0.00 0.00 34.7 1224.0 1.88 0.70 4.31 4.9 589.1 0.91 0.48 42 0.00 0.00 0.0 589.1 0.91 0.48 2.53 1.5 0.0 0.00 0.00 44 0.00 0.00 0.0 0.0 0.00 0.00 0.00 0.2 0.0 0.00 0.00 46 0.00 0.00 0.0 0.0 0.00 0.00 0.00 0.2 0.0 0.00 0.00 48 0.00 0.00 0.0 0.0 0.00 0.00 0.00 0.2 0.0 0.00 0.00 50 0.00 0.00 0.0 0.0 0.00 0.00 0.00 0.2 0.0 0.00 0.00 52 0.00 0.00 0.0 0.0 0.00 0.00 0.00 0.2 0.0 0.00 0.00 54 0.00 0.00 0.0 0.0 0.00 0.00 0.00 0.2 0.0 0.00 0.00 56 0.00 0.00 0.0 0.0 0.00 0.00 0.00 0.2 0.0 0.00 0.00 58 0.00 0.00 0.0 0.0 0.00 0.00 0.00 0.2 0.0 0.00 0.00 60 0.00 0.00 0.0 0.0 0.00 0.00 0.00 0.2 0.0 0.00 0.00 10 Year Ditch Ditch Block 1 Block 1 Block2 RCP Outflow Outflow Tc~ QQQfil ~ g QQ@ QQQfil Y. Vtotal Atotal ti Qweir ds/dt Vstorage Astorage Hstorage 0 0.00 0.00 0.00 0.00 0.0 0.0 0.00 0.00 0.00 0.0 0.0 0.00 0.00 2 1.84 2.92 1.84 2.92 175.2 175.2 0.27 0.26 1.04 0.9 112.9 0.17 0.21 4 3.68 5.84 3.68 5.84 525.6 638.5 0.98 0.50 2.69 3.5 414.9 0.64 0.41 6 5.53 8.76 5.53 8.76 876.0 1290.9 1.99 0.72 4.48 7.2 860.6 1.32 0.59 8 7.37 11.68 o.aa 7.37 11.68 1226.4 2087.0 3.21 0.91 6.33 12.a 1438.1 2.21 a.76 10 9.21 14.6a 1.17 o.ao 1a.38 15.77 1646.8 3084.9 4.75 1.11 8.35 18.4 2203.8 3.39 a.94 12 8.29 13.14 2.33 1.01 11.63 16.48 1934.6 4138.4 6.37 1.28 10.27 25.2 3021.2 4.65 1.10 14 7.37 11.68 3.5a 2.a1 12.88 17.19 2a2a.1 5041.3 7.76 1.42 11.77 31.a 3718.9 5.72 1.22 16 6.45 10.22 4.66 3.a2 14.13 17.9a 2105.5 5624.4 8.96 1.52 13.01 36.1 4337.6 6.67 1.31 18 5.53 8.76 5.83 4.a2 15.38 18.61 2191.0 6528.6 1a.04 1.61 14.06 40.9 4904.5 7.55 1.40 20 4.61 7.30 5.25 5.03 14.88 17.58 2171.5 7076.0 10.89 1.68 14.85 44.5 5341.0 6.22 1.46 22 3.66 5.84 4.66 4.53 12.68 15.03 1956.5 7297.5 11.23 1.70 15.17 45.6 5496.1 8.46 1.48 24 2.76 4.38 4.08 4.02 10.87 12.48 1651.0 7147.1 11.00 1.69 14.96 44.5 5339.7 8.21 1.46 26 1.84 2.92 3.50 3.52 8.86 9.94 1345.4 6685.1 10.28 1.63 14.29 41.1 4930.3 7.59 1.40 26 0.92 1.46 2.91 3.02 6.85 7.39 1039.9 5970.2 9.18 1.54 13.23 36.0 4319.1 6.64 1.31 30 0.00 0.00 2.33 2.52 4.85 4.85 734.4 5053.5 7.77 1.42 11.79 29.6 3552.1 5.46 1.19 32 1.75 2.01 3.76 3.76 516.5 4068.6 6.26 1.27 10.14 22.9 2752.3 4.23 1.05 34 1.17 1.51 2.67 2.67 386.2 3138.5 4.83 1.12 8.46 16.9 2022.4 3.11 0.90 36 0.58 1.01 1.59 1.59 255.8 2276.2 3.50 0.95 6.74 11.4 1366.5 2.10 0.74 38 0.00 0.50 0.50 0.50 125.5 1492.1 2.30 0.77 4.96 6.6 789.1 1.21 0.56 40 0.00 0.00 0.00 30.2 819.3 1.26 0.57 3.22 2.7 0.0 0.00 0.00 42 o.oa a.oo a.a 0.0 0.00 a.oo a.oo 1.1 a.a o.aa 0.00 44 0.00 0.00 o.a 0.0 0.00 a.oo a.oo 1.1 0.0 0.00 0.00 46 0.00 0.00 0.0 0.0 0.00 0.00 0.00 1.1 0.0 0.00 0.00 48 0.00 0.00 0.0 0.0 0.00 0.00 0.00 1.1 0.0 0.00 0.00 50 0.00 0.00 0.0 0.0 0.00 0.00 0.00 1.1 0.0 0.00 0.00 52 0.00 0.00 0.0 0.0 0.00 0.00 0.00 1.1 0.0 0.00 o.oa 54 0.00 0.00 0.0 0.0 0.00 0.00 0.00 1.1 a.o 0.00 0.00 56 0.00 0.00 0.0 0.0 0.00 0.00 a.ao 1.1 0.0 0.00 0.00 58 0.00 0.00 0.0 0.0 0.00 0.00 a.oa 1.1 0.0 0.00 0.00 60 0.00 0.00 0.0 0.0 0.00 0.00 0.00 1.1 0.0 a.oo 0.00 5 Year Ditch Ditch Block 1 Block 1 Block 2 RCP Outflow Outflow Tc~ QQQfil Qpre Q Qpre Qpost y_ Vtotal Atotal .ti Qweir ds/dt Vstorage Astorage Hstorage 0 0.00 0.00 0.00 0.00 0.0 0.0 0.00 0.00 0.00 0.0 0.0 0.00 0.00 2 1.65 2.61 1.65 2.61 156.8 156.8 0.24 0.25 0.96 0.8 99.5 0.15 0.20 4 3.30 5.23 3.30 5.23 470.5 570.0 0.88 0.48 2.47 3.0 364.1 0.56 0.38 6 4.95 7.84 4.95 7.84 784.2 1148.3 1.77 0.68 4.12 6.3 752.7 1.16 0.55 8 6.60 10.46 0.00 6.60 10.46 1097.9 1850.6 2.85 0.86 5.81 10.5 1254.8 1.93 0.71 10 8.25 13.07 1.05 0.00 9.30 14.12 1474.3 2729.1 4.20 1.04 7.66 16.0 1920.9 2.96 0.87 12 7.43 11.76 2.09 0.90 10.42 14.76 1732.3 3653.2 5.62 1.21 9.41 21.9 2629.0 4.04 1.02 14 6.60 10.46 3.14 1.80 11.54 15.39 1808.9 4437.9 6.83 1.33 10.78 26.9 3226.7 ·4.96 1.13 16 5.78 9.15 4.18 2.70 12.66 16.03 1885.6 5112.3 7.87 1.43 11.89 31.3 3752.3 5.77 1.22 18 4.95 7.84 5.23 3.60 13.78 16.67 1962.3 5714.6 8.79 1.51 12.84 35.3 4231.1 6.51 1.30 20 4.12 6.53 4.71 4.50 13.33 15.74 1944.8 6176.0 9.50 1.57 13.54 38.3 4593.4 7.07 1.35 22 3.30 5.23 4.18 4.05 11.53 13.46 1752.2 6345.7 9.76 1.59 13.78 39.2 4706.4 7.24 1.37 24 2.47 3.92 3.66 3.60 9.74 11.18 1478.6 6185.1 9.52 1.57 13.55 37.9 4545.0 6.99 1.34 26 1.65 2.61 3.14 3.15 7.94 8.90 1205.0 5750.0 8.85 1.51 12.89 34.7 4163.4 6.41 1.29 28 0.82 1.31 2.62 2.70 6.14 6.62 931.4 5094.9 7.84 1.42 11.86 30.1 3609.8 5.55 1.20 30 0.00 0.00 2.09 2.25 4.34 4.34 657.8 4267.6 6.57 1.30 10.49 24.4 2926.7 4.50 1.08 32 1.57 1.80 3.37 3.37 462.7 3389.3 5.21 1.16 8.93 18.5 2224.4 3.42 0.94 34 1.05 1.35 2.40 2.40 345.9 2570.3 3.95 1.01 7.34 13.3 1594.2 2.45 0.80 36 0.52 0.90 1.42 1.42 229.1 1823.3 2.81 0.85 5.75 8.6 1037.9 1.60 0.64 38 0.00 0.45 0.45 0.45 112.4 1150.3 1.77 0.68 4.13 4.6 557.9 0.86 0.47 40 0.00 0.00 0.00 27.0 584.9 0.90 0.48 2.52 1.6 0.0 0.00 0.00 42 0.00 0.00 0.0 0.0 0.00 0.00 0.00 0.3 0.0 0.00 0.00 44 0.00 0.00 0.0 0.0 0.00 0.00 0.00 0.3 0.0 0.00 0.00 46 0.00 0.00 0.0 0.0 0.00 0.00 0.00 0.3 0.0 0.00 0.00 48 0.00 0.00 0.0 0.0 0.00 0.00 0.00 0.3 0.0 0.00 0.00 50 0.00 0.00 0.0 0.0 0.00 0.00 0.00 0.3 0.0 0.00 0.00 52 0.00 0.00 0.0 0.0 0.00 0.00 0.00 0.3 0.0 0.00 0.00 54 0.00 0.00 0.0 0.0 0.00 0.00 0.00 0.3 0.0 0.00 0.00 56 0.00 0.00 0.0 0.0 0.00 0.00 0.00 0.3 0.0 0.00 0.00 58 0.00 0.00 0.0 0.0 0.00 0.00 0.00 0.3 0.0 0.00 0.00 60 0.00 0.00 0.0 0.0 0.00 0.00 0.00 0.3 0.0 0.00 0.00 30 25 20 -~ ~15 0 10 5 0 0 Hydrograp h for Ditch Secti o n 1 00 Year Sto rm 10 20 30 40 Time (min) ---Block 1 (Qpre) __._ Block 1 (Qpost) _._ Block 2 (Qpre) -.it.-RCP (Q) -+-Ditch Outflow (Qpre) ~ Ditch Outflow (Qpost) -cm-Ditch Outflow (Qweir) 50 20 010 5 Hydrograph for Ditch Section 50 Year Storm 0 ~~-+~_._-J?-..~--+~~-l-~---t~~~~--e-=:::os::~~-im-+---~--1 0 10 20 30 40 50 Time (min) ---Block 1 (Qpre) _.._ Block 1 (Qpost) ----Block 2 (Qpre) ----.--RCP (Q) ---+-Ditch Outflow (Qpre) ~ Ditch Outflow (Qpost) Ditch Outflow (Qweir) 25 20 01 0 5 0 Hydrograph for Ditch Section 25 Year Storm 10 20 30 40 Time (m in) ------Block 1 (Qpre) ~ Block 1 (Qpost ) ---Block 2 (Qpre) __.._ RCP (Q) --+--Ditch Outflow (Qpre) ~ Ditch Outflow (Qpost) ---m-Ditch Outflow (Qweir) 5 0 -~ 15 Hydrograph for Ditch Section 1 0 Year Storm ~10 0 5 0 ~~-+~----~~--+~~-+-~--l~~~~~f-=-=~~--ID-~+--~~ 0 10 20 30 40 50 Time (min) ----Block 1 (Qpre) __..._ Block 1 (Qpost) ------Block 2 (Qpre) ----A-RC P ( Q) -+-Ditch Outflow (Qpre) ~ Ditch Outflow (Qpost) --{;J-Ditch Outflow (Qweir) -~ 15 Hydrograph for Ditch Section 5 Yea r Sto rm ~10 0 5 0 eJ=-~--+-~--=-~~---+~~-+-~---4~~~~~1-=~~-D-~+--~~ 0 10 20 30 40 50 T im e (min) ---Block 1 (Qpre) __.._ Block 1 (Qpost) __._ Block 2 (Qpre) __...__ RCP (Q) -+-Ditch Outflow (Qpre) -x-Ditch Outflow (Qpost) -c;}-Ditch Outflow (Qweir) '. . . ,.• · .. · ~ : ··:: .•. ,_.· ; ... : .. ~~ . . ·; .. ollege _'Station 480083 : :_ .· ... .. · .. ·. . PROJECT LOCATION ZONE X ' ' Rio Grande Blvd. VICINITY MAP nts I Drainage Report ~---- ---~..UU..Ac.t=e Crawford Burnett League College Station, Brazos _County, Texas Prepared For: William D. Fitch College Station , Texas Prepared By: Municipal Development Group 203 Holleman Drive East College Station , Tx 77840 (409) 693-5359 May 1994 ' Approved By : North Bardell, P .E. / / / TO MUNICIPAL DEVELOPMENT GROUP P.O. Box 9249 203 Holleman Drive East College Station. Texas 77840-9249 (409) 693 -5359 ~~'A-€'( JO\&= l.D.C s. WE ARE SENDING YOU O Attached O Under separate cover via _________ the following items: COPIES 1,,,- 0 Shop draw ings 0 Copy of letter DATE t;/.,l- - O Prints 0 Change order HO . ')")_ .. , .. , c:: I 0 Plans 0 Samples 0 Specifications g-::::: :1APri4kitf ~''EXS DESCRIPTION ~ ' ... ~.vJ. t:::;....,,._~· -P~. 4- - THESE ARE TRANSMITTED as checked below: ct For approval 0 For your use 0 As requested O Approved as submitted 0 Approved as noted O Returned for corrections 0 Resubmit __ copies ' for approval 0 Submit __ copies for distribution 0 Return __ corrected prints 0 For review and comment 0 ------------------------ 0 FOR BIDS DUE _________ l9 ___ 0 PRINTS RETURNED AFTER LOAN TO US REMARKS--------------------------------------- COPY TO_~............:;......__p/\U-1.1,"-l.IL=.!,..V(;;;.i..,...______ ~ ~ I SIGNED: j ,\ .. .--lie\ It UdHMrH are~ H --~If -lllf -f---( ~~~~~--------------------!!!'!!!!!~ Southwood Forest Phase 5 General Location The tract to be developed is located on the southwest comer of Rock Prairie Road and Rio Grande Boulevard . Lots 1-7, Block 1, and Lot 1, Block 2 of Southwood Forest comprises this property. Property Description This tract is a total of 5 . 00 acres. The entire area is currently unimproved. Current development will be restricted to Lots 1-7, Block 1, which will be developed for single-family residential use. Lot 1, Block 2 is z~ned CN and will be reserved for future commercial improvement. Primary Drainage Basin Description The residential tract drains at a slope of2.5% to the northeast into an existing earth channel along Rio Grande Boulevard. The future commercial tract drains at a slope of 1.5% to the east onto Rock Prairie Road and then drains into an existing recessed curb inlet which also drains into the existing earth channel. This project does not propose significant changes to these patterns. The tract does not lie in the floodplain or floodway according to FEMA-FIRM Maps 48041CO182C (July 2, 1992). Drainage Facility Design The existing earth channel along Rio Grande Boulevard will be realigned and reconstructed to match the channel downstream . No site-specific flooding problems have been noted in the existing patterns . The total impervious area added during this project is 1.14 acres and will result in an additional 7. 9 c.f s. for the 100-year storm . To manage the additional runoff, a rectangular notched weir will be constructed 400 feet downstream . The weir will extend 2. 7' from the existing concrete wall. The equation used to determine the flow through the weir was : Q wtr • C,.. (W -0 .2(H)]H 1.5 Where. : Q wir • Flow tlrrOllgh the Weir C,.. • Weir Coefficient (Used 2 .89) W • Width of Opening H • Height of Ponded Water The volume of the drainage ditch that will be utilized for this tract is 12155 c.f, which will sufficiently detain the excess runoff Future Usage of Site At some time in the future, Lot 1, Block 2 will be utilized for commercial development. At the same time, drainage facilities will be designed for that tract, per City of College Station Drainage Standards. RAINA GE Rational Method (Q = CIA) Block 1 Lots 1-7 Pre-Development Description Grassland Post-Development Runoff Description Landscaping Impervious Area Cavg = Frequency (years) 100 50 25 10 5 Area (acres) 3.06 Area (acres) 1.92 1.14 3.06 1.698 Intensity* (in/in) 12.6 11 .1 9.9 8.6 7.7 I ~ 0.35 ~ 0.35 0.90 3.06 Cpre 0.35 0.35 0.35 0.35 0.35 = C(area) 1.071 CC area) 0.672 *NOTE : Houses assumed to be 1.026 3500 sq . ft . apiece , to 1.698 match existing homes in South Wood Forest . 0.55 Cpost 0.55 0.55 0.55 0.55 0.55 Qpre (cfs) 13.49 11 .89 10.60 9.21 8.25 Qpost (cfs) 21.39 18.85 16.81 14 .60 13.07 *NOTE : Tc= 10 min Vpre .{Qfi 12145 10699 9543 8290 7422 Vpost .{Qfi 19255 16963 15129 13143 11767 Req'd Storage Volume .{Qfi 7110 6264 5587 4853 4345 20 5 0 5 Hydrograph* 1 00 Year Storm ··-·· ---·-·---·-···-·----··· ----------. .! 19 2 5 5 c . f. j__________ .. ·---------------·-h ·-------------------- 10 15 Required Detention 7110 c.f ..____ ___ ___,--·-·---··-··--·---- 20 25 30 Tc= Time of Concentration (min.) *Block 1, Lots 1-7 Block2 Lot 1 Pre-Development Area DescriQtion (acres) .Q. C{area) Grassland 1.94 0.35 0.679 Post-Development Area DescriQtion (acres) .Q. C(area) Landscaping 1.10 0.35 0.385 *NOTE: Assume landscaping not Impervious to be less than 1.1 acres. Area 0.84 0.90 0.756 1.94 1.141 Cavg = 1.141 I 1.94 = 0.59 Runoff Req'd Storage Frequency Intensity* Cpre Cpost Qpre Qpost Vpre Vpost Volume (years) (In/in) ---(cfs) (cfs) ~ ~ ~ 100 12.6 0.35 0.59 8.56 14.38 7700 12939 5239 50 11.1 0.35 0.59 7.54 12.67 6783 11399 4615 25 9.9 0.35 0.59 6.72 11.30 6050 10166 4116 10 8.6 0.35 0.59 5.84 9.81 5255 8831 3576 5 7.7 0.35 0.59 5.23 8.79 4705 7907 3202 *NOTE: Tc= 10 min Hydrograph* 1 00 Year Storm 16 ~~~~~~~~~~~~~~ 14 12 Qpost ..... J 12 93 9 c. f. ! .............................. -............................. ... ~ 10 ·-·-·-······ Qpre -····· --·-----·······-·--·····-·--···-··· ··-·---··· -·-·-·-· ·····--·-· Required Detention ··-· 'j 8 5239 c.f. ...._.... 0 6 4 2 0 ---+--+--t-----+--+---+---+---f~-t---t---+-~ 0 5 10 15 20 25 30 Tc= Time of Concentration (min.) *For Block 2 , Lot 1 Both Blocks (1 & 2) Pre-Development Area Description (acres) ~ C(area} Grassland 5 .00 0.35 1.750 Post-Development Area Description (acres} ~ C(area} Landscaping 2 .67 0.35 0 .934 Impervious Area 2.33 0.90 2.097 5.00 3 .032 Cavg = 3 .032 I 5 .00 = 0 .61 Runoff Req'd Storage Frequency Intensity* Cpre Cpost Qpre Qpost Vpre Vpost Volume (years} (in/in} (cfs} (cfs} .(Qil .(Qil .(Qil 100 12.6 0 .35 0 .61 22.05 38 .20 19845 34377 14532 50 11 .1 0.35 0.61 19 .43 33 .65 17482 30285 12802 25 9 .9 0.35 0 .61 17.33 30 .01 15593 27011 11418 10 8.6 0 .35 0.61 15 .05 26 .07 13545 23464 9919 5 7.7 0 .35 0 .61 13.48 23 .34 12128 2 1008 8881 *NOTE : Tc = 10 min 40 Qpost 30 ......-. Qpre . (/) 'j 20 .........,. 0 10 0 5 Hydrograph* 100 Year Storm 34377 c.f. 10 15 Required Detention 14532 c .f 20 25 Tc= Time of Concentration (min.) 30 *For Blocks 1 & 2 Routing 100 Year Ditch Ditch Block 1 Block 1 Block 2 RCP Outflow Outflow Tc Qpre Qpost Qpre .Q Qpre Qpost Y.. Vtotal Atotal ti Qweir ds/dt Vstorage Astorage Hstorage 0 0.00 0.00 0.00 0.00 0.0 0.0 0.00 0.00 0.00 0.0 0.0 0.00 0.00 2 2.70 4.28 2.70 4.28 256.7 256.7 0.39 0.32 1.38 1.5 174.1 0.27 0.26 4 5.40 8.56 5.40 8.56 770.0 944.1 1.45 0.61 3.57 5.4 647.0 1.00 0.51 6 8.09 12.83 8.09 12.83 1283.4 1930.4 2.97 0.88 5.99 11.3 1356.7 2.09 0.73 8 10.79 17.11 0.00 10.79 17.11 1796.8 3153.5 4.85 1.12 8.48 19.0 2285.1 3.52 0.95 10 13.49 21.39 1.74 0.00 15.23 23.13 2414.5 4699.7 7.23 1.37 11.22 29.3 3517.6 5.41 1.18 12 12.14 19.25 3.48 1.48 17.10 24.21 2840.5 6358.1 9.78 1.59 13.81 40.5 4856.5 7.47 1.39 14 10.79 17.11 5.22 2.96 18.97 25.29 2970.2 7826.7 12.04 1.76 15.90 50.4 6043.9 9.30 1.55 16 9.44 14.97 6.96 4.44 20.84 26.37 3099.9 9143.8 14.07 1.91 17.65 59.4 7130.3 10.97 1.68 18 8.09 12.83 8.70 5.92 22.71 27.45 3229.6 10359.9 15.94 2.03 19.18 67.9 8149.8 12.54 1.80 20 6.75 10.70 7.83 7.40 21.98 25.93 3202.7 11352.5 17.47 2.13 20.37 74.8 8979.2 13.81 1.89 22 5.40 8.56 6.96 6.66 19.02 22.18 2886.1 11865.2 18.25 2.17 20.97 78.2 9384.5 14.44 1.93 24 4.05 6.42 6.09 5.92 16.06 18.43 2436.2 11820.6 18.19 2.17 20.92 77.6 9307.1 14.32 1.92 26 2.70 4.28 5.22 5.18 13.10 14.68 1986.3 11293.4 17.37 2.12 20.30 73.5 8819.9 13.57 1.87 28 1.35 2.14 4.35 4.44 10.14 10.93 1536.4 10356.3 15.93 2.03 19.18 66.6 7987.4 12.29 1.78 30 0.00 0.00 3.48 3.70 7.18 7.18 1086.5 9073.9 13.96 1.90 17.56 57.2 6869.5 10.57 1.65 32 2.61 2.96 5.57 5.57 765.0 7634.5 11.75 1.74 15.64 47.0 5642.3 8.68 1.50 34 1.74 2.22 3.96 3.96 571.8 6214.1 9.56 1.57 13.60 37.2 4460.0 6.86 1.33 36 0.87 1.48 2.35 2.35 378.6 4838.6 7.44 1.39 11.44 27.8 3336.2 5.13 1.15 38 0.00 0.74 0.74 0.74 185.4 3521.6 5.42 1.18 9.17 19.0 2284.8 3.52 0.95 40 0.00 0.00 0.00 44.4 2329.2 3.58 0.96 6.85 11.4 1368.2 2.10 0.74 42 0.00 0.00 0.0 1368.2 2.10 0.74 4.68 5.6 676.9 1.04 0.52 44 0.00 0.00 0.0 676.9 1.04 0.52 2.81 1.9 0.0 0.00 0.00 46 0.00 0.00 0.0 0.0 0.00 0.00 0.00 0.5 0.0 0.00 0.00 48 0.00 0.00 0.0 0.0 0.00 0.00 0.00 0.5 0.0 0.00 0.00 50 0.00 0.00 0.0 0.0 0.00 0.00 0.00 0.5 0.0 0.00 0.00 52 0.00 0.00 0.0 0.0 0.00 0.00 0.00 0.5 0.0 0.00 0.00 54 0.00 0.00 0.0 0.0 0.00 0.00 0.00 0.5 0.0 0.00 0.00 56 0.00 0.00 0.0 0.0 0.00 0.00 0.00 0.5 0.0 0.00 0.00 58 0.00 0.00 0.0 0.0 0.00 0.00 0.00 0.5 0.0 0.00 0.00 60 0.00 0.00 0.0 0.0 0.00 0.00 0.00 0.5 0.0 0.00 0.00 30 25 20 -~ ~15 0 10 5 0 0 Hydrograph for Ditch Section 100 Y ear Storm 10 20 30 40 Time (min) ----Block 1 (Qpre) _._ Block 1 (Qpost) ---Block 2 (Qpre) __.__ RCP (Q) -+-Ditch Outflow (Qpre) --*-Ditch Outflow (Qpost) -m-Ditch Outflow (Qweir) 50 50 Year Ditch Ditch Block 1 Block 1 Block 2 RCP Outflow Outflow Tc Qpre Qpost ~ g ~ QQQfil Y.. Vtotal A total tl Qweir ds/dt Vstorage Astorage Hstorage 0 0.00 0.00 0.00 0.00 0.0 0.0 0.00 0.00 0.00 0.0 0.0 0.00 0.00 2 2.38 3.77 2.38 3.77 226.2 226.2 0.35 0.30 1.25 1.3 151.0 0.23 0.25 4 4.76 7.54 4.76 7.54 678.6 829.6 1.28 0.57 3.25 4.7 559.1 0.86 0.47 6 7.13 11.31 7.13 11.31 1131.0 1690.1 2.60 0.82 5.44 9.7 1168.2 1.80 0.68 8 9.51 15.08 0.00 9.51 15.08 1583.4 2751.6 4.23 1.05 7.71 16.4 1962.7 3.02 0.88 10 11.89 18.85 1.51 0.00 13.40 20.36 2126.3 4089.0 6.29 1.28 10.18 25.1 3015.8 4.64 1.10 12 10.70 16.97 3.02 1.30 15.02 21.28 2498.2 5514.0 8.48 1.48 12.53 34.6 4151.7 6.39 1.29 14 9.51 15.08 4.52 2.60 16.63 22.20 2608.7 6760.4 10.40 1.64 14.40 42.9 5144.9 7.92 1.43 16 8.32 13.20 6.03 3.89 18.25 23.12 2719.3 7864.1 12.10 1.77 15.95 50.4 6042.8 9.30 1.55 18 7.13 11.31 7.54 5.19 19.87 24.04 2829.8 8872.6 13.65 1.88 17.30 57.3 6877.2 10.58 1.65 20 5.95 9.43 6.79 6.49 19.22 22.70 2804.6 9681.7 14.89 1.96 18.34 62.9 7543.2 11.60 1.73 22 4.76 7.54 6.03 5.84 16.63 19.41 2526.8 10070.1 15.49 2.00 18.82 65.3 7840.2 12.06 1.77 24 3.57 5.66 5.28 5.19 14.04 16.13 2132.3 9972.5 15.34 1.99 18.70 64.3 7720.8 11.88 1.75 26 2.38 3.77 4.52 4.54 11.45 12.84 1737.7 9458.5 14.55 1.94 18.06 60.4 7252.9 11.16 1.70 28 1.19 1.89 3.77 3.89 8.85 9.55 1343.2 8596.1 13.22 1.85 16.94 54.1 6496.3 9.99 1.61 30 0.00 0.00 3.02 3.25 6.26 6.26 948.6 7444.9 11.45 1.72 15.38 45.9 5506.0 8.47 1.48 32 2.26 2.60 4.86 4.86 667.1 6173.2 9.50 1.57 13.53 37.0 4438.6 6.83 1.33 34 1.51 1.95 3.46 3.46 498.8 4937.4 7.60 1.40 11.61 28.6 3429.0 5.28 1.17 36 0.75 1.30 2.05 2.05 330.4 3759.4 5.78 1.22 9.60 20.7 2487.1 3.83 0.99 38 0.00 0.65 0.65 0.65 162.1 2649.1 4.08 1.03 7.50 13.5 1623.1 2.50 0.80 40 0.00 0.00 0.00 38.9 1662.0 2.56 0.81 5.38 7.4 889.2 1.37 0.59 42 0.00 0.00 0.0 889.2 1.37 0.59 3.42 3.0 0.0 0.00 0.00 44 0.00 0.00 0.0 0.0 0.00 0.00 0.00 1.3 0.0 o.ao 0.00 46 0.00 o.oa o.a 0.0 0.00 o.oa a.oa 1.3 o.a 0.00 0.00 48 0.00 a.ao 0.0 0.0 a.oo 0.00 0.00 1.3 a.o 0.00 0.00 50 0.00 0.00 0.0 0.0 0.00 0.00 0.00 1.3 0.0 0.00 0.00 52 0.00 0.00 a.a 0.0 o.oa 0.00 0.00 1.3 0.0 o.ao o.oa 54 0.00 0.00 0.0 0.0 0.00 0.00 0.00 1.3 0.0 0.00 0.00 56 0.00 0.00 0.0 0.0 a.ao o.oa o.ao 1.3 0.0 a.aa o.aa 58 a.ao o.oa 0.0 a.o a.ao 0.00 o.ao 1.3 o.a o.oa 0.00 60 0.00 a.oo 0.0 a.o a.ao o.aa 0.00 1.3 a.a a.oo a.oo 20 010 5 Hydrograph for Ditch Section 50 Year Storm 0 ~~-1-~4?---J?-~--1-~~-l-~---+~----=~~~--===::oa:::"4-~-e-l--~_j 0 10 20 30 40 50 Time (min) ---Block 1 (Qpre) -llf'-Block 1 (Qpost) ---Block 2 (Qpre) __..._ RCP (Q) -+-Ditch Outflow (Qpre) ~ Ditch Outflow (Qpost) -{jjJ-Ditch Outflow (Qweir) 25 Year Ditch Ditch Block 1 Block 1 Block 2 RCP Outflow Outflow Tc Qpre Qpost ~ .Q Qpre .Q.pQfil y_ Vtotal Atotal .t! Qweir ds/dt Vstorage Astorage Hstorage 0 0.00 0.00 0.00 0.00 0.0 0.0 0.00 0.00 0.00 0.0 0.0 0.00 0.00 2 2.12 3.36 2.12 3.36 201.7 201.7 0.31 0.28 1.15 1.1 132.6 0.20 0.23 4 4.24 6.72 4.24 6.72 605.2 737.8 1.14 0.54 2.99 4.1 489.4 0.75 0.44 6 6.36 10.09 6.36 10.09 1008.6 1498.0 2.30 0.77 4.99 8.5 1019.2 1.57 0.64 8 8.48~ 0.00 8.48 13.45 1412.0 2431.3 3.74 0.98 7.06 14.2 1708.3 2.63 0.82 10 10.60 16. 1.34 0.00 11.94 18.15 1896.1 3604.5 5.55 1.20 9.32 21.8 2621.7 4.03 1.02 12 9.54 15.13 2.69 1.16 13.39 18.98 2227.7 4849.5 7.46 1.39 11.46 30.0 3602.5 5.54 1.20 14 8.48 13.45 4.03 2.32 14.83 19.80 2326.3 5928.8 9.12 1.54 13.17 37.1 4451.1 6.85 1.33 16 7.42 11.77 5.38 3.47 16.27 20.62 2424.8 6875.9 10.58 1.65 14.57 43.4 5211.9 8.02 1.44 18 6.36 10.09 6.72 4.63 17.71 21.44 2523.3 7735.2 11.90 1.75 15.78 49.3 5914.5 9.10 1.53 20 5.30 8.41 6.05 5.79 17.14 20.24 2500.9 8415.4 12.95 1.83 ~ 53.9 6466.7 9.95 1.60 22 4.24 6.72 5.38 5.21 14.83 17.31 2253.2 8720.0 13.42 1.86 55.8 6691.9 10.30 1.63 24 3.18 5.04 4.70 4.63 12.52 14.38 1901.4 8593.3 13.22 1.85 4 54.6 6551.0 10.08 1.61 26 2.12 3.36 4.03 4.05 10.21 11.45 1549.6 8100.5 12.46 1.80 16.28 50.9 6107.8 9.40 1.56 28 1.06 1.68 3.36 3.47 7.89 8.52 1197.7 7305.5 11.24 1.71 15.18 45.2 5418.2 8.34 1.47 30 0.00 0.00 2.69 2.90 5.58 5.58 845.9 6264.0 9.64 1.58 13.67 37.8 4533.0 6.97 1.34 32 2.02 2.32 4.33 4.33 594.9 5127.9 7.89 1.43 11.91 29.9 3592.9 5.53 1.20 34 1.34 1.74 3.08 3.08 444.8 4037.7 6.21 1.27 10.09 22.6 2717.4 4.18 1.04 36 0.67 1.16 1.83 1.83 294.7 3012.1 4.63 1.09 8.21 15.9 1913.7 2.94 0.87 38 0.00 0.58 0.58 0.58 144.5 2058.3 3.17 0.91 6.27 9.9 1189.3 1.83 0.69 40 0.00 0.00 0.00 34.7 1224.0 1.88 0.70 4.31 4.9 589.1 0.91 0.48 42 0.00 0.00 0.0 589.1 0.91 0.48 2.53 1.5 0.0 0.00 0.00 44 0.00 0.00 0.0 0.0 0.00 0.00 0.00 0.2 0.0 0.00 0.00 46 0.00 0.00 0.0 0.0 0.00 0.00 0.00 0.2 0.0 0.00 0.00 48 0.00 0.00 0.0 0.0 0.00 0.00 0.00 0.2 0.0 0.00 0.00 50 0.00 0.00 0.0 0.0 0.00 0.00 0.00 0.2 0.0 0.00 0.00 52 0.00 0.00 0.0 0.0 0.00 0.00 0.00 0.2 0.0 0.00 0.00 54 0.00 0.00 0.0 0.0 0.00 0.00 0.00 0.2 0.0 0.00 0.00 56 0.00 0.00 0.0 0.0 0.00 0.00 0.00 0.2 0.0 0.00 0.00 58 0.00 0.00 0.0 0.0 0.00 0.00 0.00 0.2 0.0 0.00 0.00 60 0.00 0.00 0.0 0.0 0.00 0.00 0.00 0.2 0.0 0.00 0.00 20 010 5 Hydrograph for Ditch Section 25 Year Storm 0 ~~-+~--=--~~-+~~-+-~--+~__;_::w-~---je-=~~~-tm-t--~-1 0 10 20 30 40 50 Time (min) ---Block 1 (Qpre) __._ Block 1 (Qpost) -----Block 2 (Qpre) -A--RCP (Q) -+--Ditch Outflow (Q pre) --*"-Ditch Outflow (Qpost) --mi-Ditch Outflow (Qweir) 10 Year Ditch Ditch Block 1 Block 1 Block2 RCP Outflow Outflow Tc Qpre .QQQfil Qpre .Q Qpre Qpost Y.. Vtotal Atotal ti Qweir ds/dt Vstorage Astorage Hstorage 0 0.00 0.00 0.00 0.00 0.0 0.0 0.00 0.00 0.00 0.0 0.0 0.00 0.00 2 1.84 2.92 1.84 2.92 175.2 175.2 0.27 0.26 1.04 0.9 112.9 0.17 0.21 4 3.68 5.84 3.68 5.84 525.6 638.5 0.98 0.50 2.69 3.5 414.9 0.64 0.41 6 5.53 8.76 5.53 8.76 876.0 1290.9 1.99 0.72 4.48 7.2 860.6 1.32 0.59 8 7.37 11.68 0.00 7.37 11.68 1226.4 2087.0 3.21 0.91 6.33 12.0 1438.1 2.21 0.76 10 9.21 ~ 1.17 0.00 10.38 15.77 1646.8 3084.9 4.75 1.11 8.35 18.4 2203.8 3.39 0.94 12 8.29. 13. 4 2.33 1.01 11.63 16.48 1934.6 4138.4 6.37 1.28 10.27 25.2 3021.2 4.65 1.10 14 7.37 11.68 3.50 2.01 12.88 17.19 2020.1 5041.3 7.76 1.42 11.77 31.0 3718.9 5.72 1.22 16 6.45 10.22 4.66 3.02 14.13 17.90 2105.5 5824.4 8.96 1.52 13.01 36.1 4337.6 6.67 1.31 18 5.53 8.76 5.83 4.02 15.38 18.61 2191.0 6528.6 10.04 1.61 14.06 40.9 4904.5 7.55 1.40 20 4.61 7.30 5.25 5.03 14.88 17.58 2171.5 7076.0 10.89 1.68 ~ 44.5 5341.0 8.22 1.46 22 3.68 5.84 4.66 4.53 12.88 15.03 1956.5 7297.5 11.23 1.70 1 45.8 5496.1 8.46 1.48 24 2.76 4.38 4.08 4.02 10.87 12.48 1651.0 7147.1 11.00 1.69 14.96 44.5 5339.7 8.21 1.46 26 1.84 2.92 3.50 3.52 8.86 9.94 1345.4 6685.1 10.28 1.63 14.29 41.1 4930.3 7.59 1.40 28 0.92 1.46 2.91 3.02 6.85 7.39 1039.9 5970.2 9.18 1.54 13.23 36.0 4319.1 6.64 1.31 30 0.00 0.00 2.33 2.52 4.85 4.85 734.4 5053.5 7.77 1.42 11.79 29.6 3552.1 5.46 1.19 32 1.75 2.01 3.76 3.76 516.5 4068.6 6.26 1.27 10.14 22.9 2752.3 4.23 1.05 34 1.17 1.51 2.67 2.67 386.2 3138.5 4.83 1.12 8.46 16.9 2022.4 3.11 0.90 36 0.58 1.01 1.59 1.59 255.8 2278.2 3.50 0.95 6.74 11.4 1366.5 2.10 0.74 38 0.00 0.50 0.50 0.50 125.5 1492.1 2.30 0.77 4.98 6.6 789.1 1.21 0.56 40 0.00 0.00 0.00 30.2 819.3 1.26 0.57 3.22 2.7 0.0 0.00 0.00 42 0.00 0.00 0.0 0.0 0.00 0.00 0.00 1.1 0.0 0.00 0.00 44 0.00 0.00 0.0 0.0 0.00 0.00 0.00 1.1 0.0 0.00 0.00 46 0.00 0.00 0.0 0.0 0.00 0.00 0.00 1.1 0.0 0.00 0.00 48 0.00 0.00 0.0 0.0 0.00 0.00 0.00 1.1 0.0 0.00 0.00 50 0.00 0.00 0.0 0.0 0.00 0.00 0.00 1.1 0.0 0.00 0.00 52 0.00 0.00 0.0 0.0 0.00 0.00 0.00 1.1 0.0 0.00 0.00 54 0.00 0.00 0.0 0.0 0.00 0.00 0.00 1.1 0.0 0.00 0.00 56 0.00 0.00 0.0 0.0 0.00 0.00 0.00 1.1 0.0 0.00 0.00 58 0.00 0.00 0.0 0.0 0.00 0.00 0.00 1.1 0.0 0.00 0.00 60 0.00 0.00 0.0 0.0 0.00 0.00 0.00 1.1 0.0 0.00 0.00 -~ 20 15 Hydrograph for Ditch Section 10 Yea r Storm ~1 0 0 5 0 10 20 30 4 0 T im e (m in) ---Block 1 (Qpre) ......._ Block 1 (Qpost) _._ Block 2 (Qpre) ___.._ RCP (Q) -+---Ditch Outflow (Qpre) ---x--Ditch Outflow (Qpost) Ditch Outflow (Qweir) 50 5 Year Ditch Ditch Block 1 Block 1 Block 2 RCP Outflow Outflow Tc~ QQQfil Qpre Q Qpre Qpost y_ Vtotal Atotal .ti Qweir ds/dt Vstorage Astorage Hstorage 0 0.00 0.00 0.00 0.00 0.0 0.0 0.00 0.00 0.00 0.0 0.0 0.00 0.00 2 1.65 2.61 1.65 2.61 156.8 156.8 0.24 0.25 0.96 0.8 99.5 0.15 0.20 4 3.30 5.23 3.30 5.23 470.5 570.0 0.88 0.48 2.47 3.0 364.1 0.56 0.38 6 4.95 7.84 4.95 7.84 784.2 1148.3 1.77 0.68 4.12 6.3 752.7 1.16 0.55 8 6.60 ~ 0.00 6.60 10.46 1097.9 1850.6 2.85 0.86 5.81 10.5 1254.8 1.93 0.71 10 8.25 1.05 0.00 9.30 14.12 1474.3 2729.1 4.20 1.04 7.66 16.0 1920.9 2.96 0.87 12 7.43 11.76 2.09 0.90 10.42 14.76 1732.3 3653.2 5.62 1.21 9.41 21.9 2629.0 4.04 1.02 14 6.60 10.46 3.14 1.80 11.54 15.39 1808.9 4437.9 6.83 1.33 10.78 26.9 3226.7 4.96 1.13 16 5.78 9.15 4.18 2.70 12.66 16.03 1885.6 5112.3 7.87 1.43 11.89 31.3 3752.3 5.77 1.22 18 4.95 7.84 5.23 3.60 13.78 16.67 1962.3 5714.6 8.79 1.51 12.84 35.3 4231.1 6.51 1.30 20 4.12 6.53 4.71 4.50 13.33 15.74 1944.8 6176.0 9.50 1.57 13.54 38.3 4593.4 7.07 1.35 22 3.30 5.23 4.18 4.05 11.53 13.46 1752.2 6345.7 9.76 1.59 ~ 39.2 4706.4 7.24 1.37 24 2.47 3.92 3.66 3.60 9.74 11.18 1478.6 6185.1 9.52 1.57 13.55 37.9 4545.0 6.99 1.34 26 1.65 2.61 3.14 3.15 7.94 8.90 1205.0 5750.0 8.85 1.51 12.89 34.7 4163.4 6.41 1.29 28 0.82 1.31 2.62 2.70 6.14 6.62 931.4 5094.9 7.84 1.42 11.86 30.1 3609.8 5.55 1.20 30 0.00 0.00 2.09 2.25 4.34 4.34 657.8 4267.6 6.57 1.30 10.49 24.4 2926.7 4.50 1.08 32 1.57 1.80 3.37 3.37 462.7 3389.3 5.21 1.16 8.93 18.5 2224.4 3.42 0.94 34 1.05 1.35 2.40 2.40 345.9 2570.3 3.95 1.01 7.34 13.3 1594.2 2.45 0.80 36 0.52 0.90 1.42 1.42 229.1 1823.3 2.81 0.85 5.75 8.6 1037.9 1.60 0.64 38 0.00 0.45 0.45 0.45 112.4 1150.3 1.77 0.68 4.13 4.6 557.9 0.86 0.47 40 0.00 0.00 0.00 27.0 584.9 0.90 0.48 2.52 1.6 0.0 0.00 0.00 42 0.00 0.00 0.0 0.0 0.00 0.00 0.00 0.3 0.0 0.00 0.00 44 0.00 0.00 0.0 0.0 0.00 0.00 0.00 0.3 0.0 0.00 0.00 46 0.00 0.00 0.0 0.0 0.00 0.00 0.00 0.3 0.0 0.00 0.00 48 0.00 0.00 0.0 0.0 0.00 0.00 0.00 0.3 0.0 0.00 0.00 50 0.00 0.00 0.0 0.0 0.00 0.00 0.00 0.3 0.0 0.00 0.00 52 0.00 0.00 0.0 0.0 0.00 0.00 0.00 0.3 0.0 0.00 0.00 54 0.00 0.00 0.0 0.0 0.00 0.00 0.00 0.3 0.0 0.00 0.00 56 0.00 0.00 0.0 0.0 0.00 0.00 0.00 0.3 0.0 0.00 0.00 58 0.00 0.00 0.0 0.0 0.00 0.00 0.00 0.3 0.0 0.00 0.00 60 0.00 0.00 0.0 0.0 0.00 0.00 0.00 0.3 0.0 0.00 0.00 -~ 15 Hydrograph for Ditch Section 5 Yea r Storm ~ 10 ---------------- 0 5 0 ~:__+-~~~+-~-+----~+-~*--=~~~11----+-__J 0 10 20 30 40 50 T im e (m in) ---Block 1 (Qpre) _____._ Block 1 (Qpost) ---Block 2 (Qpre) _____.__ RCP (Q) -+-Ditch Outflow (Qpre) --*-Ditch Outflow (Qpost) --e-Ditch Outflow (Qweir) I ... ,.- .· : ·~ . : . .. . ~· . ...,ollege.,Stafion 480083.·:: : .- PROJECT LOCATION ' ' Rio Grande Blvd VICINITY MAP nts I I . ! MUNICIPAL DEVELOPMENT GROUP P.O. Box 9249 203 Holleman Drive East College Stat ion, Texas 77840-9249 (409) 693-5359 TO tyj(?'S. VC!]?ou\CA M.o~t-.J A~ c;r,.y e:~·,~t:sst... . ..10• NO. Z-377 WE ARE SENDING YOU O Attached 0 Under separate cover via __ _... _____ the following items : 0 Prints 0 Plans 0 Samples O Spec ificat ions 0 Shop drawi ngs O Copy of letter 0 Change order o ___________________ _ COPIES DATE NO. DESCRIPTION l ~ 1','S.i:rf"\ ~1 DIS. '-I ~ -• ,,, c..12-~. ~ c::::::1 ~n 12" (A~A\ THESE ARE TRANSMITIED as checked below: ""For approval O For your use 0 As requested 0 Approved as subm itted O Approved as noted 0 Returned for corrections 0 Resubm it __ copies for approval 0 Submit __ copies for distribution O Retum __ corrected pri nts ~r review and comment 0 ---------------------- 0 FOR BIDS OUE _________ l9 ___ 0 PRINTS RETURNED AFTER LOAN TO US ' REMARKS------------------------------------ COPY TO·------------------ SIGNED: __ ')~aa.~u:~-'l?-.::1.-_~.i...--:J..=;;;__ ___ _ ,, .,.._,,.. - -.. n«ed, ~, -tty ... at -· • EoC1n l/P e:uv.'~ "To~ C.OJ..S1a,o1... fut_~~ oF p./::::Ar -:::> e: ct'1 or-> I I. .. I ... ..... :·:,\ .. I I \ -COHSTAUCT Sl~.W. '5HOErM.) ''-........, MUSJ NOT E>a£ll 2' CROSS SlDP.E ~ ~uh Of"P c.u<US NOT rosail , •· IHUT TOP· 312 .!51 '-4 ~ : ~ .. ~ .. .. : : INLET TOP• 112 . !51 ~--,~'\./¥~ G20SS -SLOPe CA~A'""J