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HomeMy WebLinkAbout59 291 A LodgeCoDEVELOPMENT PERMIT PERMIT NO . #2 9 1A FOR AREAS OUTSIDE THE SPECIAL FLOOD HAZARD AREA RE : CHAPTER 13 OF THE COLLEGE STATION CITY CODE SITE LEGAL DESCRIPTION: Part of Lot 2 of Lodgeco Subdivision Part of Lot 2 of North Park Addition Section II SITE ADDRESS: M eadowland Str ee t -next to Hampton Inn OWNER: L odgeco Prop erti es Ltd. P.O. Box 10614 College Station, Texas 77 842 DRAINAGE BASIN: Carter Creek; draining to Burton Creek, Basin 1 (Bry an). TYPE OF DEVELOPMENT: Thi s permit is valid for the site construc tion asso ciated with the construction of a swimming pool for Lodgeco Properties. Erosion control must be . installed and ma intained in accordance with the approved plans. Contractor shall prevent silt and debris from leaving th e s ite in accordance with th e City of College Station Drainage Policy and D esign, Criteria. Owner and/or contrac tor shall be responsible for any dam age to exis ting city stree ts or infrastructure du e to heavy machinery and/or equip ment. Th e parking ·lot, associated landscaping, and irrigation system will be permitted separately at a later date. This permit, being temporary, is valid only within sixty (60) days of the date shown below, and is not intended to allow the complete development of the site as proposed. Any work p erform ed after th e expiration of this permit is not cover ed, and is considered unauthorized. 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 outside the special flood hazard area. All development shall be in accordance with the plans and specifications mitted to and approved by the City Engineer in the development permit application for above name project and all of the codes and ordinances of the City of College Station t t apply . ,,. Date Date 13--9 s Date (p_ t ed by Veronica Morgan From: Shirley Volk To: Veronica Morgan Subject: fwd: Lodgeco ===NOTE===============6/20/95==9:24am== CC: Jane Kee, Natalie Thomas, Sabina Kuenzel V: David Moore has looked over the irrigation plan and sai d he has no problem with it. The copy of the easement you gave to Nat is actually the original. What do you want to do next? As far as I know, thi s thing is ready to go and wh at is lack ing is the Drainage Development Permit. As I recall, you wanted that to be don e simultaneousl y with the filing of the easement, but I don't know how to do that, because they don't want to file it until you issue the DDP, and you don't want to issue the DDP until they file the easement! What have you decided will be the process? Fwd=by:=Veronica=Morg=6/20/95=12:27pm== Fwd to: Shirley Volk i'll issue , th ey sign and we follow them to the cou rthouse to get a copy of the filed easement. im easy on this one just so it all happ ens in some close proximity to each other. -not days or weeks apart s o we forget. you know my forgetfulness i s on the rise lately so i have to curb it any way i can. Fwd=by:=Shirley=Volk==6/21/95==8:23am== Fwd to: Veronica Morgan CC: Natalie Thomas Are you ready to issue now if I call Galindo and tell him? Who need s to come in to get the DDP? Has Galindo submitted the application and paid the fee? Just let me know what to do and when, and I'll be happy to follow through on this. Nat will help, al s o, if we need for her to. Fwd=by:=Natalie=Thoma=6/21/95==8:40am== Fwd to: Shirley Volk I have to go to the court hou se today or tomorrow to file some plat s anyway. So, jus t let me know. Fwd=by:=Shirley=Volk==6/23/95=10:33am== Fwd to: Veronica Morgan V: Where are we on this? Fwd=by:=Veronica=Morg=6/27/95==5:31pm== Fwd to: Natalie Thoma s , Sabina Kuenzel, Shirley Volk i know it has been a while since you girls have heard from me on email. well, shirley knows some of this already but i 1 ll brief you all now. i have been in contact with fred bayliss and gary mobley on this. supposedly, gary just wants to build the pool and nothing else and bayliss just wants the pool in now too. sooooo, i have changed the ddp to cover the site construction for the pool ONLY and with a statement that the parking lot will follow with anoth er ddp for it (actually the same ddp #, with an "a" and 11 b11 part -so they only ha ve one fee). gary mobley s hould be coming in to si gn. we need to hold on the filing of the abandonment Page: 1 6/29/95 10:23am d?·:i.Yr~ed by Veronica Morgan of the easement until the second half of the ddp is issued. shirley is going to check with bldg to see if they have pool plans reviewed or to review to i s sue a bldg permit for the pool. clear as Mud??? Fwd=by:=Sabina=Kuenze=6/28/95==9:15am== Fwd to: Natalie Thomas, Shirley Volk, Veronica Morgan CC: David Moore, Jane Kee, Joey Dunn, Lisa Hankins before we issue any certificate of completion we will ensure that the illegal gravel parking lot i s no longer in us e! Fwd=by:=Veronica=Morg=6/29/95==9:48am== Fwd to: Sabina Kuenzel do you want to do this for just the pool too? your call, just a s king for clarification. Fwd=by:=Sabina=Kuenze=6/29/95=10:20am== Fwd to: Veronica Morgan absolutely! Fwd=by:=Veronica=Morg================== Fwd to: Sabina Kuenzel okee dokee, i 1 ll put this note in the ddp folder too. Page: 2 6/29/95 10:23am Figure XI I-1 Application Form Development Permit For Areas Outside Flood Hazard Areas City of College Station, Texas (re: Ordinance No./'?Z1J) ...,...~, ,,,,. ~~r 2 / ~t:>Dta'co :IUBP/VISl/t:>N AND Site Legal Description: PART ~,I: ~t:>r 2, Ne>R7"H ~,e,k ADD/7"/PN secr/e>N .2Z' Site Address: Located in: ---~--'4:;..a..;..R....;...;;..r.....;;;4!':....;;~-=-"""'Cl'-'-l<l~4.=45:...;~'-"-------------Watershed Owner: ~ODt!JECe> PRt:>PGle7'1£S ~TP. Address: Telephone Arch;i tect/ CH.tl /8r/AAI A, c:§gine~ GA~ hVDe> Contractor: Address: PUJ,B()X /06/~ cs, rx 778'42 No.: 8"'1-6-.f.~Q/ Telephone No.: Date Application Filed: MAY a-:z, l~-6' Approved: Application is hereby made for the following development: Attached as part of this application: Application Fee -P11-1P ~f-z:v/~~ +- Drainage Plan with suppor'ting documentation: two copies of each Other: ~I P*"1111'A?'E" ,J(C~GS.S FASHMr. AAANQONNl~Alr /NS7A!UM£/t/r. $PAI/I/kl.El! /ARIGA-Tle>AI ,.o~ A# Nl~l. '56 : #Qa111t1 rrFJ;> $G'PAK,+ ?E"'-Y\ -------d ~14~EN1i I, /...)Ky/(SJ , as owner, hereby acknowledge or affirm that: _ ___._........_ __ __..; ______ ,'"--'-......_~ The above Drainage Plan and supporting documents complies with the requirements of Ordinance No./71S """ D.lf:A/Ah4GE REPe>.e'T suaM1rr1=P eJN APR. 2/!j/ 199.5,, /N ,t:U./P~ICAT"'e . s~rE P~AN /.$ G.e'AD/A/G P~AA/ AND .... ./JA!A/A/AQE P~AN -4-ND PARr ,;p: DA!!AIAIAwG ,f;;?/!:~1'2'7': (k.~ Date 98 ... .. ~ · .. ' :·, ;. , . . . . > ' . • ,. :;. ·' . ~; (. . ' .· . .. ;, .~ ., ,. .. . .. . ' . .. . .. .. ·' ., , "· .. '· ·.:. ... ,• ' ~· ·. 7 . , , ,.. .. .. , .. . .. ·. ' ':•· .• •, .. : .. ..• . . -~ .. : .. . :~ . ' ... ·~ ~· ;1 ' .. ~ . :. .. ~ ; :;• ·•. .. " !' .... .. . ·:. " ~·. .~ .. ~ . ~· ;.r , . 4 ~ . : .~ ' . . J FRED BAYLISS P.C. 410 TEXAS AVES . N0.210 COLLEGE STATION, TX 77840 688 ~· ... Worlclng CapltaJ .,.,.~ Management .. Account r--;;_,.~ 19_fC 25 -80/440 I $f (QtJ.1~ _ DOLLARS THANK YOU . , ~ 4 fz>d4y , ~ -Z :'ls , 1+1"' on7 run,.;,,,,;~ CvtJcu-f>s, ~S t:;.fo~ +v Chn·s Gt1tl i'ndo ~ V~n:·~ wcr-c,: I', An in-i<jt?th't)n pla,,., neec.ls fo k '£u~WJ/~ {],·~ re VlCA-v A'1 d ~tf Yf) vr:t) . 2. w eas.erne,,f-a ~Y1don IYJ~VJ+ neecJ.s 1-o k lom r'~7 proc~ed. '_ ?. 4. -~I I / GALINDO ENGINEERS AND PLANNERS 3833 South Texas Ave., Suite 280 Bryan, Texas 77802 (409) 846-8868 Mr. Kent Laza, P.E. City Engineer City of College Station 1101 Texas Avenue College Station , TX 77840 April 20, 1995 Subject: Drainage Report 0.54-acre tract Lodgeco Parking Lot Meadowland Street College Station , TX Dear Mr. Laza: Please find enclosed for your review and approval the referenced report in duplicate with the necessary exhibits to illustrate our findings . This report is required to obtain approval of the Site Plan for the Lodgeco Parking Lot and Swimming Pool which is being submitted separately. Sincerely, GALINDO ENGINEERS AND PLANNERS Christian A. Galindo, P.E., R.P.L.S. President cc: Fred Bayliss, Atty. 1. TRACT DESCRIPTION LODGECO PARKING LOT DRAINAGE REPORT Lodgeco's parking lot is to be located on the northeast side of Meadowland Street , about 1,000 feet from its intersection with University Drive, College Station, Texas . The tract covers a portion of Lot 2, Lodgeco Subdivision and a portion of Lot 2, North Park Addition, Section II, containing an area of 23 ,532 s.f. (0.540 acre). The map shown on Exhibit A, showing the tract , has been extracted from the 24"x36" Site Plan. Topography, obtained from Williams-Stackhouse, Inc. & G. W. Muery Services, Inc., is depicted in the referenced 24"X36" drawing . The Plan shows the existing topography, proposed grading , proposed parking layout, sedimentation and erosion control notes and location of a proposed swimming pool being designed by others. Three runoff Sections have been defined tor this tract as shown on Exhibit A . · 2. FLOOD PLAIN The current Flood Insurance Study does not identify the existence of a 100-flood plain near the location of this tract. Reference is made to FEMA Map # 48041 C0144C, dated July 2, 1992 . 3 . DESIGN CRITERIA The existing direction of runoff is to be maintained after improving this site. The combined runoff from this site and the remaining portion of Lot 2, Lodgeco Subdivision, which is currently vacant, drains onto Texas Avenue, or S. H. 6, a State of Texas hi~hway. page 2 The parking lot will have an asphalt surface and will drain to the northeast through curb cuts or weirs built into a 0 .6 ' high curb. The parking lot will act as a runoff detention facility to mitigate the effects of the increased runoff rate. A rainfall intensity equivalent to a 100-year storm and a time of concentration of ten minutes was used in the calculations. Runoff was calculated using the Rational Method . 4. RUN OFF CALCULATIONS Exhibit B, or Table 1, summarizes the runoff calculations using the Rational Method. This Exhibit lists , in tabular form , the constants and factors used. Q for a return period of 100 years was used for subsequent analysis and calculations . The tract was divided into three sections for pre and post development conditions. Sections 1 and 2 that constitute the parking lot show a runoff rate increase from 3 .18 cfs to 5. 1 O cfs . Section 3 , swimming pool area , shows an increase from 0.25 cfs to 0.34 cfs . Because of the small magnitude of runoff from Section 3, which will be further reduced as the surface area of the swimming pool is known , no provisions have been mad to detain runoff from this area . 5. ON SITE DETENTION Exhibit C, Table 2, show the Mass Curve calculations and provides a preliminary sizing of the required detention pond . Exhibit C, Table 3, is the Inflow/Outflow Simulation for the detention pond. page 3 \ The outlet consists of three 5" wide curb cuts, on a 0.6' higtJ (7" high), as shown on the Site Plan . A coefficient of 0 .7 was used for the rectangular weir equation . The maximum Q-out attained with this outlet (all three weirs) is calculated at 3 .26 cfs , slightly higher than the pre-development rate of 3.18 cfs but still within acceptable engineering limits . Under these conditions the ponding volume attained is calculated at slightly over 2,900 cu.ft., a maximum ponding depth at 0.601 1.85' and the maximum outflow .....----- velocity at of 4 .34 fps a~ ~~~~~r . unif-/ meAs ,re : ~ '1 lc.s ? rec .? . ~D tf.v t:=: ITT ... d chlks tM In order to foresta erosion due to the runoff concentration at the three $ei rs 'f"'~~&;r.I a riprap pad 6'x6', is to be installed at the downstream side of each weir . It 1S 7". is further recommended that a hay bale barrier be placed further down in the remaining portion of Lot 2 , Lodgeco Subdivision , as a temporary sedimentation/erosion measure until it is developed. Exhibit D , Table 4, is a plot of the ponding available in the parking lot. The volume available is 3 ,280 cu.ft ., greater than the 2 ,900 cu .ft . required . This pond is delineated in the grading plan g iven in the 24"x36 " Site Plan. Exhibit E , flow simulation for the detention pond , is a graphical depiction of Table 3 , Exhibit C. ,,,,,,,,,,\ \\ _...... t. 0 F I ''tt ~ ~ "\, .. •••••••••• •.. .t.-rA lk ; -, •• , •• -, n Vt -G:>··· ··.(.. ~ .. ""' • • J,, .,.., .., *... -..~ ~ ~*i ···* ~ if!-•••••••••••••••••••••••••••••••••••o ••~ icHRISTIAN A . GALI 1ooi r;;·\ ....... 5·3·;·2·; .... ····_:.;·;··1 '/,~··~ .r....:1 "" ~, 0 .... ,. e, ~ --:.· '<.":' - .,{J :.<'..t-•• •• G1s rt."""°' ':\~ .,, Clf' ,-.s.s/'" ...... ~\j .: ta,, ONAl. t. ·~ \\''"''"''~% ~ CHRISTIAN A. GALINDO, P.E. # 53425, R.P.L.S. # 4473 ... April 20 , 1995 page 4 VACANT N I ~v/~ ~ '\~ REMACNDER OF , «.iv LDT 2 V ACANT /-'\'? LODGECO SUBDIVIS CON 1996 /331 PLATTED / EXISTING TEMPORARY GRAVEL PAR KING LDT EXHIBIT A REl-1AINDER OF LDT 2 -- LDDGEco SUBDIVISII 19%/331 PLATTED Job: 9-95 Name: Lodgeco Parking Lot Date: 04/19/95 RUNOFF CALCULATIONS RATIONAL METHOD (County: Brazos) TABLE l Tc = 10.0 (min.) ::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::: Section Soil Type A Acres C Veloc. Length fps ft T cone. in min. Cale. Used 5 yrs 10 yrs 25 yrs 50yrs I lOOyrs Q Q 5yrs 10 yrs Q 25 yrs Q Q 50yrs lOOyrs ::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::: Before Improvements --------------------------------------1 Gravel Lot 0.459 0.550 1.000 220 2 Commercial 0.028 0.750 1. 000 60 3 Pasture 0.053 0.400 1.500 90 ---------Total 0.540 After Improvements --------------------------------------l Commercial 0.459 0.900 4.000 190 2 Commercial 0.028 0. 900 4.000 50 3 Grass/cone. 0.053 0.550 4.000 60 ---·-----Total 0.540 3.7 10.0 7 .693 8. 635 9.861 1. 0 10.0 1.0 10.0 0.8 10.0 7 .693 8.635 9.861 0.2 10.0 0.3 10.0 Constants for use in formula: I=b/(t+d)·e Const. 2-yr 5-yr 10-yr 25-yr b 65.000 e 0. 80 6 d 8.000 76.000 0.785 8.500 80.000 0. 763 8.500 89.000 0.754 8.500 11.148 11. 639 11.148 11.639 County: Brazos 50-yr 100-yr 98.000 0. 745 8.500 96. 000 0. 730 8.000 1. 94 2.18 2.49 2.82 2.94 0.16 0.18 0.20 0.23 0.24 0.16 0.18 0.21 0.24 0.25 ---------------------------------------------2.27 2.54 2.91 3.28 3.43 3.18 3.57 4.07 4.61 4.81 0.19 0.21 0.24 0.28 0.29 0.23 0.25 0.29 0.33 0.34 ---------------------------------------------3.60 4.04 4.61~ 5.21 5. 44 ~ :I: ijj =t al Job: Date: Job: 9-95 Date: 04/19/95 HASS CURVE CALCULATIONS (100-year storm ) TABLE 2 ::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::: TIME , t C * A I (100) Q in 60 * t Vin Q out V out Delta V 0 0 0 0 5 0.438 14.7 60 6.469 300 l, 941 3'180 954 987 10 11.639 5.101 600 3,061 1, 90 8 l, 15 3 15 9.732 4.266 900 3,839 2,862 977 20 8.430 3.695 l, 200 4,434 3,816 618 25 1 .411 3.277 1,500 4,916 4, 770 146 30 6,746 2.957 1,800 5,322 5,724 (402 ) 35 6.164 2.702 2,100 5,673 6,678 ( l , 005 ) 40 5.688 2.493 2,400 5,983 7 ,632 ( l, 6 4 9) 45 5.291 2.319 2, 700 6,262 8,586 ( 2 I 3 2 4) 50 4.954 2' 171 3,000 6,514 9,540 ( 3 I 0 2 6) ------------------------------------------------------------------------------------------------------------------------------------------------------------------ Constants for use in formula: I=b/(t+d )·e County: Brazos 2-yr 5-yr 10-yr 25-yr 50-yr 100-yr --------------------------------------------------------------- b 65 76 80 89 98 96 e 0,806 0.785 0.763 0.754 0. 745 0' 730 d 8.0 8.5 8.5 8.5 8.5 8.0 9-95 FLOW SIMULATION 19-Apr-95 (25-year storm) TABLE 3 ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ Time , t Q in V in DV in + V ave Contour h Q out V out Cum. V sto. min. cfs c' f. V sto. c' f. elv, ft ft cf s c' f. V out c' f. --------------------------------------------------------------------------------------------------- 0 0 0 329.50 0 0 5 6.469 2,870 2 I 8 7 0 1,435 329.92 0.42 2. 73 819 819 2 I 0 51 10 5.101 4,526 3,707 2,879 330 .0 9 0.59 3.24 971 l, 7 90 2,736 15 4.266 5,669 3,879 3,308 330'10 0.60 3.26 979 2, 769 2 I 900 20 3.695 6,536 3,767 3,333 330.10 0.60 3.26 979 3,748 2,787 25 3.2 77 7,232 3,484 3,136 330.07 0.57 3.18 954 4,702 2, 5 30 30 2.957 7,814 3, 112 2,821 330.02 0.52 3.04 911 5,614 2,201 35 2.702 8,315 2,701 2,451 329.97 0.47 2.89 867 6,480 l, 8 3 5 40 2.493 8,315 1,835 1,835 329.91 0 '41 2.70 809 7 I 2 90 1,025 45 2.319 8,315 l,025 l, 0 25 329.69 0.19 1.84 551 7 I 8 40 474 50 2.171 8,315 474 474 329.51 0.01 0.42 126 7 ,967 348 --------------------------------------------------------------------------------------------------- EXH IBIT C LODGECO PARKI NG LOT PONDING AV AIIABIUT Y EXHIBIT D 330 .20 .-----,-------;---------:--------:--------,.-------,--------, 330. 1 0 .............................. ; .............................. ; .............................. { ............................... ; .............................. ; .............................. ; ........................... . 330.00 I I I I I : t 329.90 ! I I '. :~ '. '. z 0 ~ <{ ~ 329.80 I , , . l ! 1 r r r-· , _J w : : ·: 329.70 t r r r -r r 329.60 I I r r r r 329 .50 -+----i------T----+-----+----+---------i---~ 0 .0 500 .0 1000.0 1500.0 2000.0 2500.0 3000.0 3500.0 ST ORAGE VOLUME, 1 0 0 0 C.F. PONDING AVAILABILITY ::::::::::::::::::: Elev. PARTIAL CUM. Del h Del V Cum V ft. AREA, s.f.AREA, s.f ft. cu .ft. cu.ft. 329 .50 329.70 329.90 330.10 0 0 2,900 2,900 4,100 7,000 6,000 13,000 0.00 0 0 0.20 290 290 0.20 990 1,280 0.20 2,000 3,280 TABLE 4 • .. u l":rl Ul ~ l":rl 114 . 8 Jl:.t . :::> u ... l":rl 8 ~ ~ 0 ...:I Jl:.t IDDGECO PARKING IDT FIDW SIMUIATION EXHl~lT E 8 8 7 6 5 4 3 -, , T l j L f j T , r r - ············· ·····························1································ .........•..............................................• ···························································-·········· .. ·.·····,,,i ····················-·· .. ·.·············-·· .. ·· .. ·.·· .. ·.································· ......... ....................... ·········'·············································'···································~----~:::::--~=·· 7 . Jl:.t . 6 u 0 0 5 0 r-l ... 4 ~ :::> ...:I 0 3 > l":rl t!) 2 2 ~ 0 8 Ul 1 1 o ---~~~~~~~~~~~~r---~~~~~~~---+-o 0.0 10.0 20.0 30.0 40.0 50.0 TIME, MIN. 1-Q in -Q out .----· PONDING Ordinance Requirements : cf Comp ete and submit the necessary easement abandonment forms for the existing 20' private access easement. Provide the volume and page number of that easement abandonment prior to issuance of a drainage development permit. At this time, the maintenance staff will take care of trash collection for the proposed pool area . If City trash collection is needed in the future, a dumpster will be required in a location approved by staff and adequately screened from all public rights-of-way . Correct the lot lines on the plat and distinguish the phase line from the property line. (Include the adjacent fourplex in the first phase of the property to match the lot line .) Either move the phase line to include the remainder of the existing temporary gravel parking lot and bring that area into compliance or leave the phase line as shown and restore the remaining temporary gravel parking lot back to its original condition . (This area may have to be sodded instead of seeded because of the proposed sheet flow drainage in the area .) Submit an irrigation plan for the landscaping prior to issuance of a drainage development permit. Submit grading and drainage plans for the proposed swimming pool area to be reviewed and approved prior to issuance of a drainage development permit. Submit pavement details . The parking lot setback along Meadowland Street should be extended to 6' depth instead of the proposed 5'. Assistant City Engineer Morgan seconded the motion to approve the site plan with the above mentioned conditions which passed unopposed (3 -0). SUBMIT 4 COMPLETE SETS OF CONSTRUCTION DOCUMENTS WITH THE REVISED SITE PLAN ATTACHED TO CONTINUE WITH PHASE II OF THE BUILDING PERMIT PROCESS . COORDINATE FUTURE SUBMITTALS WITH DEVELOPMENT COORDINATOR SHIRLEY VOLK AT (409) 764-3570 . APPEAL PROCESS: An applicant may appeal the decision of the Project Review Committee to the Planning and Zoning Commission within five days after the PRC Committee meeting . Failure to appeal the PRC action shall constitute a contractual acceptance of all conditions imposed, and a waiver and surrender of all complaints, defects, or potential invalidity, whether under state or federal law . An applicant appealing the decision of the PRC shall file ten copies of the final site plan as approved by the PRC, showing all changes and requirements imposed by the PRC, and accompanied by a written explanation of those items being appealed . Until said copies are on file, no further development approval shall occur, and no further action by the Commission shall take place . An applicant may appeal only certain aspects of site plan review, and in the absence of discretionary review by the Commission, or review pursuant to a petition , all other aspects of the site plan shall be final. Any notice of appeal shall state with particularity the aspects which are to be appealed . Coordinate appeal process through Development Coordinator Shirley Volk at (409) 764-3741. Drainage Report Prepared for: Leonard Ross -Lodgeco ... <-· College Station, Texas Prepared by: Municipal Development Group 203 Holleman Drive East College Station, Texas 77840 August, 1994 GENERAL LOCATION Lodgeco's tract is bounded by Meadowland Street to the southwest and by Texas Avenue to the northeast. 1bis site is proposed to be subdivided 245 feet from the Texas Avenue boundary. Proposed development is on the remaining portion of the tract nearer Meadowland Street. The legal description is lot 2, J. E. Scott League, Abstract No. 50 in College Station, Brazos County, Texas. PROPERTY DESCRIPTION Lot 1 is a total of 1.404 acres. The portion of the site to be developed consists of0.438 acres leaving a 0.966 acre tract. (See attached Site Plan) The area to be improved currently has a 0 .28 acre gravel parking lot. The proposed expansion will have 0.44 acres of impervious area. The land is zoned Cl and no change is proposed. The site does not lie in the 100 year :floodplain which is confirmed by F.E.M.A. F.I.RM. Map No. 48041C0144 C from July 2 , 1992. DRAINAGE FACILITY DESIGN The tract currently sheetflows at approximately 1 % to the northeast toward Texas Avenue. A gravel parking lot currently exists, however, the pre-development calculations will consider the site as grassland. The expansion will include a paved parking lot . The additional Runoff caused by the development of this site was calculated to require a storage volume of2744 c.f for a 100 year storm The site was graded to detain a storage volume of 3500 c.f Seven weirs are utilized to release runoff in a sheetflow fashion. Referring to the routing tables provided for each storm, Qout is the 2 flow allowed by the seven weirs. Each weir is proposed to be a 25 ° V-notched weir which keeps Qout less than Qpre, the original flow . Runoff then returns to the original sheetflow toward Texas Avenue. 3 ~- , DRAINAGE AREA -Lodgeco Rational Method (Q = CIA) c Pre-Development Area Description (acres) ~ C(area) Landscaping 0 .53 0 .35 0 .19 Post-Development Area Description (acres) ~ C(area) Landscaping 0.09 0.35 0 .03 lmper\lious Area 0 .44 0 .90 0.40 0 .53 0.43 Cavg = 0.43 I 0.53 = 0.81 Runoff Req'd Storage Frequency Intensity" Cpre Cpost Qpre Qpost Vpre Vpost Volume (years) (in/in) (cfs) (cfs) f£fl f£fl f£fl 100 12.6 0.35 0 .81 2.34 5.39 2104 4848 2744 50 11 .1 0 .35 0 .81 2.06 4 .75 1853 4271 2418 25 9.9 0 .35 0 .81 1.84 4 .23 1653 3809 2156 10 8.6 0 .35 0.81 1.60 3 .68 1436 3309 1873 5 7.7 0 .35 0.81 1.43 3.29 1286 2963 1677 "' *NOTE : Tc= 10 min C. 100 Year Hydrograph 6 ~~~~~~~~~~~- 5 ........ ..... ....... ........ . .. . 4 ·-··-·······-------·· ···································-························-············-··------·-·········-········-·······-----····-·· .-. ........................ ······················································································ ~ ~3 02 1 0 --+--~---+---+~-"---4--+--+--+-~ 0 5 10 15 20 25 30 Time (min) I---Qpre _,,,_ Qpost I tfr"-f ROUTING FOR A 100 YEAR STORM ~,tf Peak Flows et<.. £.H'/ Qpre Qpost f t/ ~~/ Weirs (degrees) 25 2.;4 ~ T i me Qpre Qpost Vin Vstor Hstor Qout (m in) (cfs) (cfs) {g"} {g"} ill} (cfs) 0 0.00 0.00 0.00 0.00 0.00 0.00 1 0.30 0.54 485 .10 485 .10 0.23 0.51 2 0.61 1.08 970.20 670.33 0.28 0.65 3 0.91 1.62 1455.30 1029.37 0.34 . 0.90 4 1.22 2.16 1940.40 1292.38 0.38 1.06 5 1.52 2.70 2425.50 1627.25 0.43 1.26 6 1.82 3.23 2910.60 7 2. 13 3. 77 3395. 70 1931.72 ~ 1.44 2260.57 (J.5"17 1.62 8 2.43 4.31 3880.80 2583.69 0.54 1.79 9 2.74 4.85 4365 .90 2915.29 0.58 1.96 .+----~ Tc= 10 3.04 5.39 4851.00 3247.78 0.61 2.12 '+----~ 11 2.89 5. 12 4608.45 2856.52 0.57 1.93 12 2.74 4.85 4365 .90 2789.40 0.56 1.89 13 2.58 4.58 4123.35 2577.53 0.54 1. 79 14 2.43 4.31 3880.80 2433.07 0.53 1.71 15 2.28 4.04 3638 .25 2258 .55 .5 1.62 16 2.13 3.77 3395 .70 2099.56 0.49 1.53 17 1.98 3.50 3153.15 1934.55 0.47 1.44 18 1.82 3.23 2910.60 1774.05 0.45 1.35 19 1.67 2.96 2668 .05 1613.00 0.43 1.26 20 1.52 2.70 2425.50 1454. 11 0.41 1. 16 21 1.37 2.43 2182.95 1296.17 0.38 1.07 22 1.22 2.16 1940.40 1140.05 0.36 0.97 23 1.06 1.89 1697.85 985.57 0.33 0.87 24 0.91 1.62 1455.30 833.19 0.31 0.77 25 0.76 1.35 1212.75 683 .13 0.28 0.66 26 0.61 1.08 970.20 535.91 0.25 0.55 27 0.46 0.81 727.65 392 .16 0.21 0.43 28 0.30 0.54 485.10 252 .94 0.17 0.31 29 0.15 0.27 242.55 120.12 0.12 0.18 30 0 .00 0.00 0.00 0.00 o.oo 0.00 Vout {g"} 0.00 299.87 425.93 648 .02 798 .25 978.88 1135.13 1297.11 1450.61 1603.22 1751.93 1576.50 1545.82 1447.73 1379.70 1296.14 1218 .60 1136.55 1055.05 971 .39 886.78 800.35 712 .28 622.11 529.62 434.29 335.49 232 .16 122.43 0.00 0.00 >S?f'' rT) <)gg S'L ' f::o'( G>i'l/ C?~ ~c ~v rl='710>0 Is 'T>TrS CA-Lt.(..,/ t,A-t70---V B/'f5c:-V CT..V 7 Wf::l11LS /?$ 0f3SC/Z.16t::i:>) 0 W<:::::llf:::> ~ s t-toc-VN o-v PLAV, OfL. CY\Le"" ~ R _ G-> ttic..irt ~ nt<-..:::rJV f'TE:6(.fl-tc::>°"l? re '6r::r sp1...,,J. {A-LOI~ vvtnct+-~ Sf/2:><-U o4Lc.5. ROUTING FOR A 50 YEAR STORM 1·oep Weirs (degrees) 25 Time Qpre Qpost Vin Vstor Hstor Qout Vout (min) (cfs) (cfs) .{gl .{gl (ffi (cfs) .{gl 0 0.13 0.23 0.00 0.00 0.00 0.00 0.00 1 0.38 0.68 407.14 407.14 0.22 0.45 290.35 2 0.64 1.13 814.29 523.94 0.24 0.54 374.20 3 0.89 1.58 1221.43 847.23 0.31 0.78 585.33 4 1.15 2.04 1628.57 1043.24 0.34 0.91 703.18 5 1.40 2.49 2035.71 1332.53 0.39 1.09 867.49 6 1.66 2.94 2442.86 1575.36 0.42 1.23 998.57 7 1.91 3.39 2850.00 1851.43 0.46 1.39 1141.59 8 2.17 3.85 3257.14 2115.56 0.49 1.54 1273.49 9 2.42 4.30 3664.29 2390.80 0.52 1.69 1406.62 Tc= 10 2.68 4.75 4071.43 2664.81 o.55 I 1.83 I 1535.40 11 2.55 4.52 3867.86 2332.46 0.51 1.66 1378.74 12 2.42 4.30 3664.29 2285.55 0.51 1.63 1356.19 13 2.30 4.07 3460.71 2104.53 0.49 1.53 1268.06 14 2.17 3.85 3257.14 1989.08 0.48 1.47 1210.87 15 2.04 3.62 3053.57 1842.70 0.46 1.39 1137.15 16 1.91 3.39 2850.00 1712.85 0.44 1.31 1070.52 17 1.79 3.17 2646.43 1575.91 0.42 1.23 998.86 18 1.66 2.94 2442.86 1444.00 0.41 1.16 928.34 19 1.53 2.71 2239.29 1310.94 0.39 1.08 855.56 20 1.40 2.49 2035.71 1180.15 0.37 0.99 782.20 21 1.28 2.26 1832.14 1049.95 0.35 0.91 707.11 22 1.15 2.04 1628.57 921.46 0.32 0.83 630.69 23 1.02 1.81 1425.00 794.31 0.30 0.74 552.38 24 0.89 1.58 1221.43 669.04 0.28 0.65 472.10 25 0.77 1.36 1017.86 545.75 0.25 0.56 389.31 26 0.64 1.13 814.29 424.97 0.22 0.46 303.50 27 0.51 0.90 610.71 307.21 0.19 0.36 213.68 28 0.38 0.68 407.14 193.46 0.15 0.26 118.14 29 0.26 0.45 203.57 85.43 0.10 0.14 0.00 30 0.13 0.23 0.00 0.00 0.00 0.00 0.00 ....___/ ROUTINGFORA25YEARSTORM Peak Flows Qpre Qpost /, '34 Weirs ~~ (degrees) ~ 25 Time Qpre Qpost Vin Vstor Hstor Qout Vout (min) (cfs) (cfs) .{g} .{g} !ID (cfs) .{g} 0 0.11 0.00 0.00 0.00 0.00 0.00 0.00 1 0.34 0.60 543.86 543.86 0.25 0.56 283.65 2 0.57 1.01 906.43 622.78 0.27 0.62 337.17 3 0.80 1.41 1269.00 931.83 0.33 0.83 532.60 4 1.02 1.81 1631.57 1098.98 0.35 0.94 631.29 5 1.25 2.22 1994.14 1362.86 0.39 1.11 779.81 6 1.48 2.62 2356.71 1576.90 0.42 1.24 895.03 7 1.71 3.02 2719.29 1824.26 0.46 1.38 1023.40 8 1.93 3.42 3081.86 2058.45 0.48 1.51 1140.98 9 2.16 3.83 3444.43 2303.45 0.51 1.64 1260.45 Tc= 10 2.39 4.23 3807.00 2546.55 o.54 I 1.77 I 1375.89 11 2.28 4.03 3625.71 2249.82 0.51 1.61 1234.58 12 2.16 3.83 3444.43 2209.84 0.50 1.59 1215.20 13 2.05 3.63 3263.14 2047.94 0.48 1.50 1135.78 14 1.93 3.42 3081.86 1946.08 0.47 1.45 1085.01 15 1.82 3.22 2900.57 1815.57 0.45 1.37 1018.97 16 1.71 3.02 2719.29 1700.32 0.44 1.31 959.66 17 1.59 2.82 2538.00 1578.34 0.42 1.24 895.79 18 1.48 2.62 2356.71 1460.93 0.41 1.17 833.13 19 1.37 2.42 2175.43 1342.30 0.39 1.09 768.52 20 1.25 2.22 1994.14 1225.62 0.37 1.02 703.57 21 1.14 2.01 1812.86 1109.29 0.36 0.95 637.25 ' 22 1.02 1.81 1631.57 994.32 0.34 0.87 569.97 23 0.91 1.61 1450.29 880.31 0.32 0.80 501.31 24 0.80 1.41 1269.00 767.69 0.30 0.72 431.25 25 0.68 1.21 1087.71 656.46 0.27 0.64 359.49 26 0.57 1.01 906.43 546.94 0.25 0.56 285.78 27 0.46 0.81 725.14 439.37 0.22 0.47 209.67 28 0.34 0.60 543.86 334.19 0.19 0.39 130.57 29 0.23 0.40 362.57 232.00 0.16 0.29 0.00 30 0.11 0.20 181.29 181.29 0.14 0.24 0.00 ,_) ROUTING FOR A 10 YEAR STORM Peak Flows Qpre Qpost ~ 0 Weirs ~ (cfs) (, (degrees} ~ 25 Time Qpre Qpost Vin Vstor Hstor Qout Vout (min} (cfs} (cfs} .@ .@ illl (cfs} .@ 0 0.10 0.00 0.00 0.00 0.00 0.00 0.00 1 0.30 0.53 473.14 473.14 0.23 0.50 272.45 2 0.50 0.88 788.57 516.12 0.24 0.53 302.82 3 0.69 1.23 1104.00 801.18 0.30 0.74 490.77 4 0.89 1.58 1419.43 928.66 0.32 0.83 569.11 5 1.09 1.93 1734.86 1165.74 0.36 0.98 708.07 6 1.29 2.28 2050.29 1342.22 0.39 1.09 806.90 7 1.49 2.63 2365.71 1558.81 0.42 1.22 923.88 8 1.68 2.98 2681.14 1757.27 0.45 1.34 1027.52 9 1.88 3.33 2996.57 1969.05 0.47 1.46 1134.94 Tc= 10 2.08 3.68 3312.00 2177.06 o.5o I 1.57 I 1237.67 11 1.98 3.50 3154.29 1916.62 0.47 1.43 1108.63 12 1.88 3.33 2996.57 1887.94 0.46 1.41 1094.16 13 1.78 3.15 2838.86 1744.70 0.45 1.33 1021.04 14 1.68 2.98 2681.14 1660.10 0.43 1.28 977.16 15 1.58 2.80 2523.43 1546.27 0.42 1.22 917.22 16 1.49 2.63 2365.71 1448.50 0.41 1.16 864.85 17 1.39 2.45 2208.00 1343.15 0.39 1.10 807.42 18 1.29 2.28 2050.29 1242.87 0.38 1.03 751.69 19 1.19 2.10 1892.57 1140.88 0.36 0.97 693.85 20 1.09 1.93 1734.86 1041.00 0.34 0.90 635.94 21 0.99 1.75 1577.14 941.20 0.33 0.84 576.67 22 0.89 1.58 1419.43 842.76 0.31 0.77 516.64 23 0.79 1.40 1261.71 745.07 0.29 0.70 455.31 24 0.69 1.23 1104.00 648.69 0.27 0.63 392.79 25 0.59 1.05 946.29 553.49 0.25 0.56 328.71 26 0.50 0.88 788.57 459.86 0.23 0.49 262.93 27 0.40 0.70 630.86 367.93 0.20 0.41 194.98 28 0.30 0.53 473.14 278.17 0.18 0.34 124.36 29 0.20 0.35 315.43 191.07 0.15 0.25 0.00 30 0.10 0.18 157.71 157.71 0.13 0.22 0.00 I ' / ROUTINGFORASYEARSTORM Peak Flows Qpre Qpost ,AJ Weirs ~ Mfil I (degrees} '-· ~ 25 Time Qpre Qpost Vin Vstor Hstor Qout Vout (min} (cfs} (cfs} {ff} {ff} ill} (cfs} {ff} 0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 1 0.19 0.33 296.10 296.10 0.18 0.35 261.85 2 0.37 0.66 592.20 330.35 0.19 0.38 288.98 3 0.56 0.99 888.30 599.32 0.26 0.60 482.86 4 0.74 1.32 1184.40 701.54 0.28 0.67 550.32 5 0.93 1.64 1480.50 930.18 0.33 0.83 693.01 6 1.12 1.97 1776.60 1083.59 0.35 0.93 783.78 7 1.30 2.30 2072.70 1288.92 0.38 1.06 900.40 8 1.49 2.63 2368.80 1468.40 0.41 1.17 998.56 9 1.67 2.96 2664.90 1666.34 0.44 1.29 1103.40 Tc= 10 1.86 3.29 2961.00 1857.60 o.46 I 1.40 I 1201.77 11 1.77 3.13 2812.95 1611.18 0.43 1.26 1074.51 12 1.67 2.96 2664.90 1590.39 0.43 1.24 1063.56 13 1.58 2.80 2516.85 1453.29 0.41 1.16 990.41 14 1.49 2.63 2368.80 1378.39 0.40 1.12 949.73 15 1.40 2.47 2220.75 1271.02 0.38 1.05 890.43 16 1.30 2.30 2072.70 1182.27 0.37 1.00 840.46 17 1.21 2.14 1924.65 1084.19 0.35 0.93 784.13 18 1.12 1.97 1776.60 992.47 0.34 0.87 730.28 19 1.02 1.81 1628.55 898.27 0.32 0.81 673.67 20 0.93 1.65 1480.50 806.83 0.30 0.75 617.28 21 0.84 1.48 1332.45 715.17 0.29 0.68 559.12 22 0.74 1.32 1184.40 625.28 0.27 0.62 500.24 23 0.65 1.15 1036.35 536.11 0.25 0.55 439.70 24 0.56 0.99 888.30 448.60 0.23 0.48 377.78 25 0.47 0.82 740.25 362.47 0.20 0.41 313.79 26 0.37 0.66 592.20 278.41 0.18 0.34 247.53 27. 0.28 0.49 444.15 196.62 0.15 0.26 178.01 28 0.19 0.33 296.10 118.09 0.12 0.18 103.89 29 0.09 0.16 148.05 44.16 0.07 0.08 0.00 30 0.00 0.00 0.00 0.00 0.00 0.00 0.00 Drainage Report Prepared for: Leonard Ross -Lodgeco College Station, Texas Prepared by: Municipal Development Group 203 Holleman Drive East College Station, Texas 77840 GENERAL LOCATION Lodgeco's tract is bounded by Meadowland Street to the southwest and by Texas Avenue to the northeast. This site is proposed to be subdivided 245 feet from the Texas Avenue boundary. Proposed development is on the remaining portion of the tract nearer Meadowland Street. The legal description is lot 2 , J. E. Scott League, Abstract No. 50 in College Station, Brazos County, Texas . PROPERTY DESCRIPTION Lot 1 is a total of 1.404 acres . The portion of the site to be developed consists of 0.438 acres leaving a 0.966 acre tract. (See attached Site Plan) The area to be improved currently has a 0.28 acre gravel parking lot. The proposed expansion will have 0.44 acres of impervious area. The land is zoned Cl and no change is proposed. The site does not lie in the 100 year floodplain which is DRAINAGE FACILITY DESIGN Texas Avenue . At the time when the existing gravel parking lot was constructed no detention was required . However, detention is required for the proposed increased runoff This expansion includes a paved parking lot and a swimming pool. The additional Runoff caused by the development of this site was calculated to require a storage volume of 2109 c.f for a 100 year storm. The site was graded to Referring to the routing tables provided for each storm, Qout is the flow allowed by the seven weirs. Each weir is proposed to be a 35 ° V-notched weir which keeps Qout less than Qpre, the original flow . Runoff then returns to the original sheetflow toward Texas Avenue. 3 DRAINAGE AREA -Lodgeco Rational Method (Q = CIA) Pre-Development = Post-Development Description Landscaping Impervious Area Cavg = Runoff Frequency (years) 100 50 25 10 5 Area (acres) 0 .25 0.28 0 .53 0.24 Area (acres) 0.09 0.44 0 .53 0.43 Intensity* (in/in) 12.6 11.1 9 .9 8 .6 7 .7 I .Q_ 0 .35 .Q_ 0 .35 0 .90 0 .53 Cpre 0.46 0.46 0.46 0.46 0.46 = C(area) 0 .09 C(area) 0 .03 0.40 · 0.43 0 .81 ' Cpost 0 .81 0.81 0.81 0 .81 0 .81 *NOTE : Tc= 10 min Req 'd Storage Qpre Qpost Vpre Vpost Volume (cfs) (cfs) ~ ~ ~ 3 .04 , 5 .39 2739 4848 2109 2 .68 \ 4 .75 2413 4271 1858 2 .39 4 .23 2152 3809 1657 2 .08 3 .68 1869 3309 1440 1 .86 3 .29 1674 2963 1289 100 Year Hydrograph 6 5 .-. 4 ~ ~3 02 1 0 0 5 10 15 20 25 30 Time (min) [---Qpre -s-Qpost [ ROUTING FOR A 100 YEAR STORM Peak Flow.; Qpre Qpost Weirs (cfs) (cfs) {degrees) 3.04 5.39 35 Time Qpre Qpost Vin Vstor Hstor Qout {min) {cfs) {cfs) .(g} .(g} ill} {cfs) cf 0 0 .00 0 .00 0.00 0 .00 0 .00 0 .00 0.00 1 0 .30 0.54 485.10 485.10 0 .23 0 .73 299.87 ~~ 2 0 .61 1.08 970.20 670.33 0 .28 0 .92 479.15 3 0.91 1.62 1455.30 976.15 0.33 1. 750.19 4 1.22 2.16 1940.40 1190.21 0 .37 1 ~2 927.09 5 1.52 2 .70 2425.50 1498.41 0 .41 .69 1168.45 • 6 1.82 3 .23 2910.60 1742.15 0.44 1.89 1350.56 7 2.13 3 .77 3395.70 2045.14 0.48 2.14 1568.29 8 2 .43 4.31 3880.80 2312.51 0 2 .34 1753.77 9 2.74 4.85 4365.90 2612 .13 .54 2 .57 1955.36 Tc= 10 3 .04 5.39 4851 .00 2895.64 .57 2 .77 2140.84 11 2 .89 5 .12 4608.45 2467.61 2.46 1858 .89 12 2 .74 4.85 4365.90 2507.01 0 .53 2.49 1885.33 13 2 .58 4 .58 4123.35 2238 .02 0 .50 2 .28 1702.66 14 2 .43 4.31 3880.80 2178 .14 0 .50 2.24 1661 .26 15 2 .28 4.04 3638.25 1976.99 0 .47 2 .08 1520.06 16 2.13 3 .77 3395.70 1875.64 0.46 2.00 1447.56 17 1.98 3 .50 3153.15 1705.59 0.44 1.86 1323.67 18 1.82 3 .23 2910.60 1586.93 0.42 1.77 1235.39 19 1.67 2 .96 2668 .05 1432.66 0.40 1.63 1118.10 20 1.52 2 .70 2425 .50 1307.40 0.39 1.53 1020.53 21 1.37 2.43 2182 .95 1162.42 0 .36 1.40 904.61 22 1.22 2 .16 1940.40 1035.79 0 .34 1.28 800.37 23 1.06 1.89 1697.85 897.48 0.32 1.15 682 .80 24 0.91 1.62 1455.30 772 .50 0 .30 1.03 572 .60 25 0 .76 1.35 1212.75 640.15 0.27 0 .89 450.89 26 0 .61 1.08 970.20 519.31 0 .24 0 .76 334.12 27 0.46 0 .81 727 .65 393 .53 0 .21 0 .62 205 .03 28 0.30 0 .54 485.10 280.07 0 .18 0.48 79.34 29 0 .15 0 .27 242 .55 163.21 0.14 0 .32 0 .00 30 0.00 0 .00 0 .00 0 .00 0 .00 0 .00 0 .00 ROUTING FOR A 50 YEAR STORM Peak Flovvs Qpre Qpost Weirs (cfs) (cfs) (degrees) 2.68 4.75 35 Time Qpre Qpost Vin Vstor Hstor Qout Vout (min) (cfs) (cfs) .{g} .{g} ill} (cfs) .{g} 0 0.13 0.23 0.00 0.00 0.00 0.00 0.00 1 0.38 0.68 407.14 407.14 0.22 0.64· 290.35 2 0.64 1.13 814.29 523.94 0.24 0.77 409.60 3 0.89 1.58 1221.43 811.83 0.30 1.07 678.62 4 1.15 2.04 1628.57 949.95 0.33 1.20 798.80 5 1.40 2.49 2035.71 1236.92 0.37 1.46 1035.49 6 1.66 2.94 2442.86 1407.37 0.40 1.61 1169.47 7 1.91 3.39 2850.00 1680.53 0.44 1.84 1376.05 8 2.17 3.85 3257.14 1881.09 0.46 2.01 1522.38 9-2.42 4.30 3664.29 2-0.49 2.21 1706.97 Tc= 10 2.68 4.75 4071. 2364.46 o.52 I 2.38 I 1860.06 11 2.55 4.52 3867. 6 2007: 0.48 2.11 1612.80 12 2.42 4.30 3664.29 2051.48 0.48 2.14 1643.64 13 2.30 4.07 3460.71 1817.07 0.45 1.95 1476.11 14 2.17 3.85 3257.14 1781.03 0.45 1.92 1449.89 15 2.04 3.62 3053.57 1603.68 0.43 1.78 1318.84 16 1.91 3.39 2850.00 1531.16 0.42 1.72 1264.22 17 1.79 3.17 2646.43 1382.21 0.40 1.59 1149.96 18 1.66 2.94 2442.86 1292.90 0.38 1.51 1079.97 19 1.53 2.71 2239.29 1159.31 0.36 1.39 972.98 20 1.40 2.49 2035.71 1062.74 0.35 1.31 893.70 21 1.28 2.26 1832.14 938.44 0.33 1.19 788.96 22 1.15 2.04 1628.57 839.62 0.31 1.10 703.18 23 1.02 1.81 1425.00 721.82 0.29 0.98 597.55 24 0.89 1.58 1221.43 623.88 0.27 0.88 506.40 25 0.77 1.36 1017.86 511.46 0.24 0.76 397.20 26 0.64 1.13 814.29 417.08 0.22 0.65 300.81 27 0.51 0.90 610.71 309.91 0.19 0.52 184.36 28 0.38 0.68 407.14 222.78 0.16 0.40 82.02 29 0.26 0.45 203.57 121.55 0.12 0.26 0.00 30 0.13 0.23 0.00 0.00 0.00 0.00 0.00 ROUTING FOR A 25 YEAR STORM Peak Flows Qpre Qpost Weirs (cfs) (cfs) (degrees) 2 .39 4.23 35 Time Qpre Qpost Vin Vstor Hstor Qout Vout (min) (cfs) (cfs) ~ ~ ill1 (cfs) ~ 0 0 .11 0 .00 0 .00 0 .00 0 .00 0 .00 0.00 1 0 .34 0 .60 543.86 543 .86 0.25 0 .79 283.65 2 0 .57 1.01 906.43 622.78 0 .27 0.88 359.77 3 0 .80 1.41 1269.00 909.23 0.32 1.16 618 .27 4 1.02 1.81 1631 .57 1013.31 0 .34 1.26 706.85 5 1.25 2 .22 1994.14 1287.29 0 .38 1.51 929 .95 6 1.48 2 .62 2356.71 1426.76 0.40 1.63 1038 .86 7 1.71 3 .02 2719.29 1680.43 0.44 1.84 1230.39 8 1.93 3.42 3081 .86 1851.47 0.46 1.98 1355.43 9 2.16 3 .83 3444.4~~ 0.49 2 .17 1524.41 Tc= 10 2.39 4.23 3807.0P. 2282.59 0 .51 2 .32 I 1658.59 11 2 .28 4.03 3625.7 . 0.47 2.07 1438.35 12 2 .16 3 .83 3444.43 2006.08 0.48 2 .10 1466.00 13 2 .05 3.63 3263.14 1797.14 0.45 1.94 1316.04 14 1.93 3.42 3081.86 1765.81 0.45 1.91 1293.19 15 1.82 3.22 2900.57 1607.38 0.43 1.78 1176.03 16 1.71 3 .02 2719.29 1543.26 0 .42 1.73 1127.80 17 1.59 2.82 2538 .00 1410.20 0.40 1.62 1026.07 18 1.48 2 .62 2356.71 1330.64 0.39 1.55 964.10 19 1.37 2.42 2175.43 1211 .32 0 .37 1.44 869.40 20 1.25 2 .22 1994.14 1124.74 0.36 1.36 799.21 21 1.14 2 .01 1812.86 1013.64 0 .34 1.26 707 .13 22 1.02 1.81 1631 .57 924.44 0 .32 1.18 631 .36 23 0.91 1.61 1450.29 818 .93 0.31 1.07 539.32 24 0.80 1.41 1269.00 729.68 0 .29 0.99 459.14 25 0 .68 1.21 1087.71 628 .58 0 .27 0 .88 365.26 26 0 .57 1.01 906.43 541 .17 0 .25 0.79 281 .01 27 0.46 0 .81 725 .14 444.14 0.22 0.68 183.36 28 0.34 0 .60 543.86 360.50 0 .20 0 .58 94.81 29 0.23 0.40 362.57 267.76 0 .17 0.46 0.00 30 0 .11 0 .20 181 .29 181 .29 0 .14 0 .35 0 .00 ROUTING FOR A 10 YEAR STORM Peak Flows Qpre Qpost Weirs (cfs) (cfs) (degrees) 2.08 3 .68 35 Time Qpre Qpost Vin Vstor Hstor Qout Vout (min) (cfs) (cfs) .(gf.l .(gf.l ill} (cfs) .(gf.l 0 0 .10 0.00 0 .00 0 .00 0 .00 0 .00 0.00 1 0 .30 0 .53 473.14 473.14 0 .23 0 .71 272.45 2 0.50 0 .88 788.57 516.12 0.24 0.76 315.64 3 0.69 1.23 1104.00 788.36 0 .30 1.04 571.50 4 0 .89 1.58 1419.43 847.93 0 .31 1.10 624.28 5 1.09 1.93 1734.86 1110.57 0.36 1.35 846.98 6 1.29 2 .28 2050.29 1203.30 0 .37 1.43 922 .33 7 1.49 2 .63 2365.71 1443.38 0.40 1.64 1111.04 8 1.68 2.98 2681.14 1570.10 0.42 1.75 1207.43 9 1.88 3 .33 2996.57 s 0.45 1.93 1369.60 Tc= 10 2.08 3 .68 3312 .00 1942.40 0.47 2.05 I 1480.11 11 1.98 3 .50 3154.29 . 0.44 1.84 1285.14 12 1.88 3 .33 2996.57 1711.43 0.44 1.87 1312.67 13 1.78 3.15 2838.86 1526.19 0.42 1. 71 1174.26 14 1.68 2 .98 2881.14 1506.89 0.41 1.70 1159.60 15 1.58 2.80 2523.43 1363.83 0 .39 1.58 1049.45 16 1.49 2 .63 2365.71 1316.27 0 .39 1.53 1012.19 17 1.39 2.45 2208 .00 1195.81 0.37 1.43 916.30 18 1.29 2 .28 2050.29 1133.99 0 .36 1.37 866.15 19 1.19 2 .10 1892.57 1026.42 0 .34 1.27 777.23 20 1.09 1.93 1734.86 957.63 0.33 1.21 719.14 21 0 .99 1.75 1577.14 858.00 0 .31 1.11 633.12 22 0 .89 1.58 1419.43 786.31 0 .30 1.04 569.67 23 0.79 1.40 1261 .71 692.05 0.28 0 .95 483.98 24 0 .69 1.23 1104.00 620.02 0 .27 0 .87 416.53 25 0.59 1.05 946.29 529.76 0 .25 0.78 329.15 26 0 .50 0 .88 788 .57 459.42 0 .23 0 .70 258 .46 27 0.40 0 .70 630.86 372.40 0 .21 0.60 167.09 28 0 .30 0 .53 473.14 306.05 0 .19 0.51 93.79 29 0.20 0 .35 315.43 221.63 0 .16 0.40 0.00 30 0 .10 0 .18 157.71 157.71 0 .13 0 .31 0 .00 ROUTING FOR A 5 YEAR STORM Peak Flows Qpre Qpost Weirs (cfs) (cfs) (degrees) 1.86 3.29 35 Time Qpre Qpost Vin Vstor Hstor Qout Vout (min) (cfs) (cfs) .(gf1 .(gf1 ill} (cfs) .(gf1 0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 1 0.19 0.33 296.10 296.10 0.18 0.50 261.85 2 0.37 0.66 592.20 330.35 0.19 0.54 300.44 3 0.56 0.99 888.30 587.86 0.26 0.84 565.17 4 0.74 1.32 1184.40 619.23 0.27 0.87 595.16 5 0.93 1.64 1480.50 885.34 0.32 1.14 836.34 6 1.12 1.97 1776.60 940.26 0.33 1.19 883.69 7 1.30 2.30 2072.70 1189.01 0.37 1.42 1090.20 8 1.49 2.63 2368.80 1278.60 0.38 1.50 1161.83 9 1.67 2.96 2664.~0.41 1.69 1336.07 Tc= 10 1.86 3.29 2961.0 1624.93 o.43 I 1.80 I 1427.91 11 1.77 3.13 2812.95 . 0.40 1.59 1245.34 12 1.67 2.96 2664.90 1419.56 0.40 1.62 1272.07 13 1.58 2.80 2516.85 1244.78 0.38 1.47 1134.94 14 1.49 2.63 2368.80 1233.86 0.37 1.46 1126.22 15 1.40 2.47 2220.75 1094.53 0.35 1.34 1013.17 16 1.30 2.30 2072.70 1059.53 0.35 1.30 984.22 17 1.21 2.14 1924.65 940.43 0.33 1.19 883.84 18 1.12 1.97 1776.60 892.76 0.32 1.15 842.78 19 1.02 1.81 1628.55 785.77 0.30 1.04 748.56 20 0.93 1.65 1480.50 731.94 0.29 0.99 699.96 21 0.84 1.48 1332.45 632.49 0.27 0.89 607.73 22 0.74 1.32 1184.40 576.67 0.26 0.83 554.38 23 0.65 1.15 1036.35 481.97 0.23 0.72 460.78 24 0.56 0.99 888.30 427.52 0.22 0.66 404.89 25 0.47 0.82 740.25 335.36 0.20 0.55 305.99 26 0.37 0.66 592.20 286.21 0.18 0.49 250.50 27 0.28 0.49 444.15 193.65 0.15 0.36 138.84 28 0.19 0.33 296.10 157.26 0.13 0.31 91.43 29 0.09 0.16 148.05 56.62 0.08 0.14 0.00 30 0.00 0.00 0.00 0.00 0.00 0.00 0.00 AccouNrNo . QOI -OotJD -Lf-4 b -3o-9o 1oo.ov 323943 CITY OF COLLEGE STATION $ !OD, OD ----.A~'G-1.s-___ , 19 rf' RECEIVED OF ____ ~v1lD~-6!-r-------------..,,....-------- FOR _____ ___,ln<&""--""-"F"+'d=--<-JJ_""'""D ........ D..._P_~=H-#',@.....-.......~e_.~(L~· k~·~----- Paid by_ Check / 'ftd.... Cash __ THANK YOU l-/:::...8 . --~---~~--------=:::::..__~-~~- -·-=---""1'9"--- Figure XII Application Form Development Permit Inside/Outside Established Flood Hazard Areas City of College Station, Texas (re: Ordinance No. 1728) LoJ3e-Co. So lo of ~v' ~ s (-o~ Site Legal Description: L 0 t 2 ) J. c. 5cot-t L~ 'J ve) Rbrlva-o-+ iF 50 ~I. >l::i. Site Address: :joO B/ 00 l I etfA_b tlvc . 5, C0 J / e-5 C:.---'5-f J!f /l - _0_ 1011 µ. Be.v-erJ01y l r/V"=e; Owner: LeL>no.:vtl Rc:s5 / ~ trCO Address:&.v~'<'~1 $;"isC.-c.-~ ~· &Jo 2-tO Telephone No.: __ I _ .2. __ -_I_ 3 Address: ~03 fl.ol l-ew\ ~ E. Telephone No.: G'/3 -535 .9 Contractor: Address: -------------------~----------Telephone No.: ________ _ Da te Application Filed : Bug. /0 7 , I rq 'f-Approved :---------- Application is hereby made for the following specific waternray alterations: -~N~O~h~e~------ Attached as pa rt of this application : ~ Ap p licati o n Fee O Signed Certificate ~Site and Co nstructi o n Plans, with supporting documentation : two (2) copies of each O Oth e r: ---------------~ ACKNOWLEDGEMENTS: I , Nor-fh (3a..~-e tf i.L> <f:J~ , as ewA~, hereby acknowledge or affirm that: The a bove Drainage Plan and supporting documents co mplies wiht the requirements of Ordinance No. 1728, and <?~&~~ Owner · Deve lo pe r Date ~ --------------------Contract or Date Page 1of2 Figure XII Continued CERTIFI CATI OSS : A I, Nt>"C'fi_ Jk if4 v ,/G-t1 , certify that any nonresidential stru cture on or proposed to be on this sit e as part of this application meets flood-proofing requirements as se t out in Sec tion of Ord inance No . 1728 ~7 tfk;rt;£. ~ Architect /En gineer a.'Y . /0, 11-t<L Date ? B. I, certify that the finished floor level of the lowest floor, includ ing any basem~nt, of any residential structure as part of this application is or proposed to be at or above the base flood elevation as established in the latest Federal Insurance Administration flood hazard study and maps, as amended. Architect/E ngineer Date C. I, A/ogTl:f: 8. BA'{"d e « , certify that the alterations or developmt!nt covered by this permit shall not diminish the flood-carrying capacity of the adjoining waterway or crossing this permitted site and that such alterations or development are consist~nt with rcquiremenrs concerning encroachments of floodways and of floodway fringes as illustrated in the latest Federal Insurance Study. ~~~d:ttz;~....,.._~_. -----~~~"""""'--«----~ ' ( 0, If 'lk. Architect/Engineer D ~ 7 D. I, do certify that any alterations, addressed in Certificat ion ''D" do not raise the level of 100-year flood as referred to Cenification 11 B 11 • Architect/Engineer Date· REVIEWED FOR AP PROV AL : --~--~==---=--.,..~~:---:,.--:---~· Floodplain Administrator Date APPROVAL: Special conditions or comments as part of approval: ---------- Pal!e 2 of-2 y....~...., . ·1:m . Drainage Report Prepared fo r: Leonard Ross -Lodgeco College Station, Texas Prepared by: Municipal Development Group 203 Holleman Drive East College Station, Texas 77840 August, 1994 GENERAL LOCATION Lodgeco's tract is bounded by Meadowland Street to the southwest and by Texas Av enue to the northeast. This site is proposed to be subdivided 245 feet from the Texas Avenue boundary. Proposed development is on the remaining portion of the tract nearer Meadowland Street. The legal description is lot 2 , J.E. Scott League, Abstract No. 50 in College Station, Brazos County, Texas. PROPERTY DESCRIPTION Lot 1 is a total of 1.404 acres. The portion of the site to be developed consists of 0 .43 8 acres leaving a 0 .966 acre tract. (See attached Site Plan) The area to be improved currently has a 0 .28 acre gravel parking lot. The proposed expansion will have 0.44 acres of impervious area. The land is zoned C 1 and no change is proposed. The site does not lie in the 100 year floodplain which is confirmed by F .E .M.A F.I.RM. Map No . 48041C0144 C from July 2 , 1992. DRAINAGE FACILITY DESIGN The tract currently sheetflows at approximately 1 % to the northeast toward Texas Avenue. At the time when the existing gravel parking lot was constructed no detention was required. However, detention is required for the proposed increased runoff. This expansion includes a paved parking lot and a swimming pool The additional Runoff caused by the development of this site was calculated to require a storage volume of 2109 c.f for a 100 year storm The site was graded to detain a storage volume of 2900 c.f Seven weirs are utilized to release runoff in a sheetflow fashion . 2 I . Referring to the routing tables provided for each storm, Qout is the flow allowed by the seven weirs. Each weir is proposed to be a 35° V-notched weir which keeps Qout less than Qpre, the original flow. Runoff then returns to the original sheet.flow toward Texas Avenue. 3 DRAINAGE AREA -Lodgeco Rational Method (Q = CIA) Pre-Development Area Description (acres} _g_ CC area) Landscaping 0.25 0.35 0.09 Gravel Parking . 0.28 0.55 0.15 0.53 0.24 Cavg = 0.24 I 0.53 = 0.46 Post-Development Area Description (acres} _g_ C(area) Landscaping 0.09 0.35 0.03 Impervious Area 0.44 0.90 0.40 0.53 0.43 Cavg = 0.43 I 0.53 = 0.81 Runoff Req'd Storage Frequency Intensity* Cpre Cpost Qpre Qpost Vpre Vpost Volume ~ On/in} ---(cfs) (cfs) !£!} !£!} !£!} 100 12.6 0.46 0.81 3.04 5.39 2739 4848 2109 50 11.1 0.46 0.81 2.68 4.75 2413 4271 1858 25 9.9 0.46 0.81 2.39 4.23 2152 3809 1657 10 8.6 0.46 0.81 2.08 3.68 1869 3309 1440 5 7.7 0.46 0.81 1.86 3.29 1674 2963 1289 *NOTE: Tc= 10 min & 100 Year Hydrograph 6 5 .-.. 4 ~ ~3 02 1 0 0 5 10 15 20 . 25 30 Time (min) 1---Qpre -&-Qpost I I , ROUTING FOR A 100 YEAR STORM Peak Flows Qpre Qpost Weirs (cfs) (cfs) (degrees} 3.04 5.39 35 Time Qpre Qpost Vin Vstor Hstor Qout Vout (min} (cfs} (cfs} .(g} .(g} {fll (cfs} .(g} 0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 1 0.30 0.54 485.10 485.10 0.23" 0.73 299.87 2 0.61 1.08 970.20 670.33 0.28 0.92 479.15 3 0.91 1.62 1455.30 976.15 0.33 1.23 750.19 4 1.22 2.16 1940.40 1190.21 0.37 1.42 927.09 5 1.52 2.70 2425.50 1498.41 0.41 1.69 1168.45 6 1.82 3.23 2910.60 1742.15 0.44 1.89 1350.56 7 2.13 3.77 3395.70 2045.14 0.48 2.14 1568.29 8 2.43 4.31 3880.80 2312.51 0.51 2.34 1753.77 9 2.74 4.85 4365.90 2612.13 0.54 2.57 1955.36 Tc= 10 3.04 5.39 4851.00 2895.64 0.57 I 2.77 I 2140.84 11 2.89 5.12 4608.45 2467.61 0.53 2.46 1858.89 12 2.74 4.85 4365.90 2507.01 0.53 2.49 1885.33 13 2.58 4.58 4123.35 2238.02 0.50 2.28 1702.66 14 2.43 4.31 3880.80 2178.14 0.50 2.24 1661.26 15 2.28 4.04 3638.25 1976.99 0.47 2.08 1520.06 16 2.13 3.77 3395.70 1875.64 0.46 2.00 1447.56 17 1.98 3.50 3153.15 1705.59 0.44 1.86 1323.67 18 1.82 3.23 2910.60 1586.93 0.42 1.77 1235.39 19 1.67 2.96 2668.05 1432.66 0.40 1.63 1118.10 20 1.52 2.70 2425.50 1307.40 0.39 1.53 1020.53 21 1.37 2.43 2182.95 1162.42 0.36 1.40 904.61 22 1.22 2.16 1940.40 1035.79 0.34 1.28 800.37 23 1.06 1.89 1697.85 897.48 0.32 1.15 682.80 24 0.91 1.62 1455.30 772.50 0.30 1.03 572.60 25 0.76 1.35 1212.75 640.15 0.27 0.89 450.89 .. 26 0.61 1.08 970.20 519.31 0.24 0.76 334.12. 27 0.46 0.81 727.65 393.53 0.21 0.62 205.03 · 28 0.30 0.54 485.10 280.07 0.18 0.48 79.34 29 0.15 0.27 242.55 163.21 0.14 0.32 0.00 30 0.00 0.00 0.00 0.00 0.00 0.00 0.00 ' ROUTING FOR A 50 YEAR STORM Peak Flows Qpre Qpost Weirs (cfs) (cfs) (degrees) 2.68 4.75 35 Time Qpre Qpost Vin Vstor Hstor Qout Vout (min) (cfs) (cfs) .(g} .(g} !ID (cfs) .(g} 0 0.13 0.23 0.00 0.00 0.00 0.00 0.00 1 0.38 0.68 407.14 407.14 0.22 0.64 290.35 -2 0.64 1.13 814.29 523.94 0.24 0.77 409.60 3 0.89 1.58 1221.43 811.83 0.30 1.07 678.62 4 1.15 2.04 1628.57 949.95 0.33 1.20 798.80 5 1.40 2.49 2035.71 1236.92 0.37 1.46 1035.49 6 1.66 2.94 2442.86 1407.37 0.40 1.61 1169.47 7 1.91 3.39 2850.00 1680.53 0.44 1.84 1376.05 8 2.17 3.85 3257.14 1881.09 0.46 2.01 1522.38 9 2.42 4.30 3664.29 2141.91 0.49 2.21 1706.97 Tc= .10 2.68 4.75 4071.43 2364.46 o.52 I 2.38 I 1860.06 11 2.55 4.52 3867.86 2007.80 0.48 2.11 1612.80 12 2.42 4.30 3664.29 2051.48 0.48 2.14 1643.64 13 2.30 4.07 3460.71 1817.07 0.45 1.95 1476.11 14 2.17 3.85 3257.14 1781.03 0.45 1.92 1449.89 15 2.04 3.62 3053.57 1603.68 0.43 1.78 1318.84 16 1.91 3.39 2850.00 1531.16 0.42 1.72 1264.22 17 1.79 3.17 2646.43 1382.21 0.40 1.59 1149.96 18 1.66 2.94 2442.86 1292.90 0.38 1.51 1079.97 19 1.53 2.71 2239.29 1159.31 0.36 1.39 972.98 20 1.40 2.49 2035.71 1062.74 0.35 1.31 893.70 21 1.28 2.26 1832.14 938.44 0.33 1.19 788.96 22 1.15 2.04 1628.57 839.62 0.31 1.10 703.18 23 1.02 1.81 1425.00 721.82 0.29 0.98 597.55 24 0.89 1.58 1221.43 623.88 0.27 0.88 506.40 25 0.77 1.36 1017.86 511.46 0.24 0.76 397.20 26 0.64 1.13 814.29 417.08 0.22 0.65 300.81 27 0.51 0.90 610.71 309.91 0.19 0.52 184:36 28 0.38 0.68 407.14 222.78 0.16 0.40 82.02 . 29 0.26 0.45 203.57 121.55 0.12 0.26 0.00 30 0.13 0.23 0.00 0.00 0.00 0.00 0.00 ' ROUTING FOR A 25 YEAR STORM Peak Flows Qpre Qpost Weirs (cfsl (cfsl {degrees) 2 .39 4 .23 35 Time Qpre Qpost Vin Vstor Hstor Qout Vout {min) {cfs) {cfs) .(Qf} .(Qf} illl {cf s) .(Qf} 0 0 .11 0 .00 0 .00 0 .00 0.00 0 .00 0.00 1 0.34 0 .60 543.86 543.86 0 .25 0 .79 283.65 2 0 .57 1.01 906.43 622.78 0 .27 0 .88 359.77 3 0 .80 1.41 1269.00 909.23 0 .32 1.16 618 .27 4 1.02 1.81 1631 .57 1013.31 0 .34 1.26 706.85 5 1.25 2 .22 1994.14 1287.29 0 .38 1.51 929.95 6 1.48 2 .62 2356.71 1426.76 0.40 1.63 1038.86 7 1.71 3 .02 2719.29 1680.43 0 .44 1.84 1230.39 8 1.93 3.42 3081.86 1851.47 0.46 1.98 1355.43 9 2 .16 3 .83 3444.43 2088 .99 0.49 2 .17 1524.41 Tc= 10 2 .39 4 .23 3807.00 2282 .59 o.51 I 2 .32 I 1658.59 11 2 .28 4 .03 3625.71 1967.12 0.47 2.07 1438 .35 12 2 .16 3.83 3444.43 2006 .08 0.48 2 .10 1466.00 13 2 .05 3 .63 3263.14 1797.14 0.45 1.94 1316.04 14 1.93 3.42 3081 .86 1765.81 0.45 1.91 1293.19 15 1.82 3 .22 2900.57 1607.38 0.43 1.78 1176.03 16 1.71 3 .02 2719.29 1543.26 0.42 1.73 1127.80 17 1.59 2 .82 2538.00 1410.20 0.40 1.62 1026.07 18 1.48 2 .62 2356.71 1330.64 0.39 1.55 964.10 19 1.37 2.42 2175 .43 1211 .32 0 .37 1.44 869.40 20 1.25 2 .22 1994.14 1124.74 0.36 1.36 -799.21 21 1.14 2 .01 1812 .86 1013.64 0.34 1.26 707.13 22 1.02 1.81 1631 .57 924.44 0.32 1.18 631 .36 23 0 .91 1.61 1450.29 818.93 0.31 1.07 539.32 24 0 .80 1.41 1269.00 729.68 0 .29 0 .99 459.14 . 25 0.68 1.21 1087.71 628.58 0 .27 0 .88 365.26 26 0 .57 1.01 906.43 541 .17 0 .25 0 .79 281 .01 .' 27 0.46 0 .81 725.14 444.14 0 .22 0.68 183.36 . 28 0 .34 0 .60 543.86 360.50 0 .20 0 .58 94 .~1 29 0 .23 0.40 362.57 267.76 0 .17 0.46 0 .00 . 30 0 .11 0.20 181 .29 181 .29 0 .14 0.35 0 .00 I . ROUTING FOR A 10 YEAR STORM Peak Flo>M> Qpre Qpost Weirs (cfs) (cfs) (degrees} 2.08 3.68 35 Time Qpre Qpost Vin Vstor Hstor Qout Vout (min) (cfsl (cfs} .{g.} .{g.} illl (cfs} {g} 0 0.10 0.00 0.00 0.00 0.00 0.00 0.00 1 0.30 0.53 473.14 473.14 0.23 0.71 272.45 2 0.50 0.88 788.57 516.12 0.24 0.76 315.64 3 0.69 1.23 1104.00 788.36 0.30 1.04 571.50 4 0.89 1.58 1419.43 847.93 0.31 1.10 624.28 5 1.09 1.93 1734.86 1110.57 0.36 1.35 846.98 6 1.29 2.28 2050.29 1203.30 0.37 1.43 922.33 7 1.49 2.63 2365.71 1443.38 . 0.40 1.64 1111.04 8 1.68 2.98 2681.14 1570.10 0.42 1.75 1207.43 9 1.88 3.33 2996.57 1789.14 0.45 1.93 1369.60 Tc= 10 2.08 3.68 3312.00 1942.40 0.41 I 2.05 I 1480.11 11 1.98 3.50 3154.29 1674.17 0.44 1.84 1285.14 12 1.88 3.33 2996.57 1711.43 0.44 1.87 1312.67 13 1.78 3.15 2838.86 1526.19 0.42 1.71 1174.26 14 1.68 2.98 2681.14 1506.89 0.41 1.70 1159.60 15 1.58 2.80 2523.43 1363.83 0.39 1.58 1049.45 16 1.49 2.63 2365.71 1316.27 0.39 1.53 1012.19 17 1.39 2.45 2208.00 1195.81 0.37 1.43 916.30 18 1.29 2.28 2050.29 1133.99 0.36 1.37 866.15 19 1.19 2.10 1892.57 1026.42 0.34 1.27 777.23 20 1.09 1.93 1734.86 957.63 0.33 1.21 719.14 21 0.99 1.75 1577.14 858.00 0.31 1.11 633.12 22 0.89 1.58 1419.43 786.31 0.30 1.04 569.67 23 0.79 1.40 1261. 71 692.05 0.28 0.95 483.98 24 0.69 1.2-3 1104.00 620.02 0.27 0.87 416.53 . 25 0.59 1.05 946.29 529.76 0.25 0.78 329.15 26 0.50 0.88 788.57 459.42 0.23 0.70 258.46 . 27 0.40 0.70 630.86 372.40 0.21 0.60 167·.09" . 28 0.30 0.53 473.14 306.05 0.19 0.51 93.7'fJ _. 29 0.20 0.35 315.43 221.63 0.16 0.40 0.00 30 0.10 0.18 157.71 157.71 0.13 0.31 0.00 ROUTING FOR A 5 YEAR STORM Peak FIO'NS Qpre Qpost Weirs (cfs) (cfs) (degrees) 1.86 3.29 35 Time Qpre Qpost Vin Vstor Hstor Qout Vout (min) (cfs) (cfs) {£f.l {£f.l @ (cfs) {£f.l 0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 1 0.19 0.33 296.10 296.10 0.18 0.50 261.85 2 0.37 0.66 592.20 330.35 0.19 0.54 300.44 3 0.56 0.99 888.30 587.86 0.26 0.84 565.17 4 0.74 1.32 1184.40 619.23 0.27 0.87 595.16 5 0.93 1.64 1480.50 885.34 0.32 1.14 836.34 6 1.12 1.97 1776.60 940.26 0.33 1.19 883.69 7 1.30 2.30 2072.70 1189.01 0.37 1.42 1090.20 8 1.49 2.63 2368.80 1278.60 0.38 1.50 1161.83 9 1.67 2.96 2664.90 1503.07 0.41 1.69 1336.07 Tc= 10 1.86 3.29 2961.00 1624.93 o.43 I 1.80 I 1427.91 11 1.77 3.13 2812.95 1385.04 0.40 1.59 1245.34 12 1.67 2.96 2664.90 1419.56 0.40 1.62 1272.07 13 1.58 2.80 2516.85 1244.78 0.38 1.47 1134.94 14 1.49 2.63 2368.80 1233.86 0.37 1.46 1126.22 15 1.40 2.47 2220.75 1094.53 0.35 1.34 1013.17 16 1.30 2.30 2072.70 1059.53 0.35 1.30 984.22 17 1.21 2.14 1924.65 940.43 0.33 1.19 883.84 18 1.12 1.97 1776.60 892.76 0.32 1.15 842.78 19 1.02 1.81 1628.55 785.77 0.30 1.04 748.56 20 0.93 1.65 1480.50 731.94 0.29 0.99 699.96 21 0.84 1.48 1332.45 632.49 0.27 0.89 607.73 22 0.74 1.32 1184.40 576.67 0.26 0.83 554.38 23 0.65 1.15 1036.35 481.97 0.23 0.72 460.78 24 0.56 0.99 888.30 427.52 0.22 0.66 404.89 25 0.47 0.82 740.25 335.36 0.20 0.55 305.99. 26 0.37 0.66 592.20 286.21 0.18 0.49 250.50. 27 0.28 0.49 444.15 193.65 0.15 0.36 138.84. 28 0.19 0.33 296.10 157.26 0.13 0.31 91.43 29 0.09 0.16 148.05 56.62 0.08 0.14 0.00 30 0.00 0.00 0.00 0.00 0.00 0.00 0.00 Drainage Report Prepared for: Leonard Ross -Lodgeco College Station, Texas Prepared by: Municipal Development Group 203 Holleman Drive East College Station, Texas 77840 August, 1994 GENERAL LOCATION Lodgeco's tract is bounded by Meadowland Street to the southwest and by Texas Avenue to the northeast. This site is proposed to be subdivided 245 feet from the Texas Avenue boundary. Proposed development is on the remaining portion of the tract nearer Meadowland Street. The legal description is lot 2 , J.E. Scott League, Abstract No. 50 in College Station, Brazos County, Texas. PROPERTY DESCRIPTION Lot 1 is a total of 1.404 acres. The portion of the site to be developed consists of 0.438 acres leaving a 0 .966 acre tract. (See attached Site Plan) The area to be improved currently has a 0 .28 acre gravel parking lot. The proposed expansion will have 0.44 acres of impervious area. The land is zoned C 1 and no change is proposed. The site does not lie in the 100 year floodplain which is confirmed by F.E.M.A. F.I.RM. Map No . 48041C0144 C from July 2, 1992 . DRAJNAGE FACILITY DESIGN The tract currently sheetflows at approximately 1 % to the northeast toward Texas Avenue. A gravel parking lot currently exists, however, the pre-development calculations will consider the site as grassland. The expansion will include a paved parking lot. The additional Runoff caused by the development of this site was calculated to require a storage volume of2744 c.f for a 100 year storm The site was graded to detain a storage volume of 3500 c.f Seven weirs are utilized to release runoff in a sheetflow fashion . Referring to the routing tables provided for each storm, Qout is the 2 flow allowed by the seven weirs. Each weir is proposed to be a 25 ° V-notched weir which keeps Qout less than Qpre, the original flow . Runoff then returns to the original sheetflow toward Texas Avenue. 3 DRAINAGE AREA -Lodgeco Rational Method (Q = CIA) Pre-Development Area Description (acres) ~ CC area) Landscaping 0 .53 0.35 0 .19 Post-Development Area Description (acres) ~ CC area) Landscaping 0 .09 0.35 0 .03 Impervious Area 0.44 0.90 0.40 0.53 0.43 Cavg = 0.43 I 0.53 = 0 .81 Runoff Req'd Storage Frequency Intensity" Cpre Cpost Qpre Qpost Vpre Vpost Volume (years) On/in) (cfs) (cfs) ~ ~ ~ 100 12 .6 0.35 0.81 2 .34 5 .39 2104 4848 2744 50 11 .1 0 .35 0 .81 2 .06 4.75 1853 4271 2418 25 9 .9 0 .35 0.81 1 .84 4 .23 1653 3809 2156 10 8 .6 0 .35 0.81 1 .60 3 .68 1436 3309 1873 5 7 .7 0.35 0.81 1.43 3 .29 1286 2963 1677 *NOTE : Tc= 10 min 100 Year Hydrograph 6 -r--~~~~~~~~~~- 5 ........... ············ ··········································-· .-. 4 ~ ~3 02 1 ············ o--+--~--+~-+-~--4-~~~~ 0 5 10 15 20 25 30 Time (min) 1---Qpre -B-Qpost I ROUTING FOR A 100 YEAR STORM Peak Flows Qpre Qpost Weirs (cfs) (cfs) (degrees} 3.04 5.39 25 Time Qpre Qpost Vin Vstor Hstor Qout Vout (min} (cfs} (cfs} .{gf1 .{gf1 ill} (cfs} .{gf1 0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 1 0.30 0.54 485.10 485.10 0.23 0.51 299.87 2 0.61 1.08 970.20 670.33 0.28 0.65 425.93 3 0.91 1.62 1455.30 1029.37 0.34 0.90 648.02 4 1.22 2.16 1940.40 1292.38 0.38 1.06 798.25 5 1.52 2.70 2425.50 1627.25 0.43 1.26 978.88 6 1.82 3.23 2910.60 1931.72 0.47 1.44 1135.13 7 2.13 3.77 3395.70 2260.57 0.51 1.62 1297.11 8 2.43 4.31 3880.80 2583.69 0.54 1.79 1450.61 9 2.74 4.85 4365.90 2915.29 0.58 1.96 1603.22 Tc= 10 3.04 5.39 4851.00 3247.78 0.61 I 2.12 I 1751_93 11 2.89 5.12 4608.45 2856.52 0.57 1.93 1576.50 12 2.74 4.85 4365.90 2789.40 0.56 1.89 1545.82 13 2.58 4.58 4123.35 2577.53 0.54 1.79 1447.73 14 2.43 4.31 3880.80 2433.07 0.53 1. 71 1379.70 15 2.28 4.04 3638.25 2258.55 0.51 1.62 1296.14 16 2.13 3.77 3395.70 2099.56 0.49 1.53 1218.60 17 1.98 3.50 3153.15 1934.55 0.47 1.44 1136.55 18 1.82 3.23 2910.60 1774.05 0.45 1.35 1055.05 19 1.67 2.96 2668.05 1613.00 0.43 1.26 971.39 20 1.52 2.70 2425.50 1454.11 0.41 1.16 886.78 21 1.37 2.43 2182.95 1296.17 0.38 1.07 800.35 22 1.22 2.16 1940.40 1140.05 0.36 0.97 712.28 23 1.06 1.89 1697.85 985.57 0.33 0.87 622.11 24 0.91 1.62 1455.30 833.19 0.31 0.77 529.62 25 0.76 1.35 1212.75 683.13 0.28 0.66 434.29 26 0.61 1.08 970.20 535.91 0.25 0.55 335.49 27 0.46 0.81 727.65 392.16 0.21 0.43 232.16 28 0.30 0.54 485.10 252.94 0.17 0.31 122.43 29 0.15 0.27 242.55 120.12 0.12 0.18 0.00 30 0.00 0.00 0.00 0.00 0.00 0.00 0.00 ROUTING FOR A 50 YEAR STORM Peak Flows Qpre Qpost Weirs (cfs) (cfs) (degrees} 2.68 4.75 25 Time Qpre Qpost Vin Vstor Hstor Qout Vout (min} (cfs} (cfs} {Ql {Ql ill} (cfs} {Ql 0 0 .13 0 .23 0 .00 0 .00 0.00 0 .00 0 .00 1 0 .38 0.68 407 .14 407 .14 0.22 0.45 290.35 2 0 .64 1.13 814.29 523 .94 0.24 0.54 374 .20 3 0 .89 1.58 1221.43 847.23 0 .31 0 .78 585 .33 4 1.15 2.04 1628 .57 1043.24 0.34 0.91 703 .18 5 1.40 2.49 2035 .71 1332.53 0.39 1.09 867.49 6 1.66 2.94 2442 .86 1575.36 0.42 1.23 998 .57 7 1.91 3 .39 2850.00 1851.43 0.46 1.39 1141.59 8 2.17 3.85 3257 .14 2115.56 0.49 1.54 1273.49 9 2.42 4.30 3664.29 2390.80 0 .52 1.69 1406.62 Tc= 10 2.68 4.75 4071.43 2664.81 0.55 1.83 I 1535.40 11 2.55 4.52 3867.86 2332.46 0 .51 1.66 1378.74 12 2.42 4.30 3664.29 2285.55 0.51 1.63 1356.19 13 2.30 4.07 3460.71 2104.53 0.49 1.53 1268.06 14 2.17 3 .85 3257 .14 1989.08 0.48 1.47 1210.87 15 2.04 3 .62 3053 .57 1842.70 0.46 1.39 1137.15 16 1.91 3 .39 2850.00 1712.85 0.44 1.31 1070.52 17 1.79 3.17 2646.43 1575.91 0 .42 1.23 998 .86 18 1.66 2.94 2442 .86 1444.00 0.41 1.16 928 .34 19 1.53 2.71 2239.29 1310.94 0 .39 1.08 855 .56 20 1.40 2.49 2035 .71 1180.15 0 .37 0 .99 782 .20 21 1.28 2.26 1832.14 1049.95 0.35 0.91 707 .11 22 1.15 2.04 1628 .57 921.46 0.32 0.83 630.69 23 1.02 1.81 1425.00 794.31 0 .30 0 .74 552 .38 24 0.89 1.58 1221.43 669.04 0 .28 0 .65 472.10 25 0.77 1.36 1017.86 545.75 0.25 0.56 389.31 26 0.64 1.13 814.29 424.97 0 .22 0 .46 303 .50 27 0.51 0.90 610.71 307.21 0 .19 0 .36 213 .68 28 0.38 0.68 407.14 193.46 0.15 0.26 118 .14 29 0.26 0.45 203.57 85.43 0.10 0.14 0.00 30 0.13 0.23 0 .00 0.00 0.00 0 .00 0 .00 ROUTING FOR A 25 YEAR STORM Peak Flows Qpre Qpost Weirs (cfs) (cfs) (degrees} 2.39 4 .23 25 Time Qpre Qpost Vin Vstor Hstor Qout Vout (min} (cfs} (cfs} {gf} {gf} ill1 (cfs} {gf} 0 0.11 0 .00 0.00 0.00 0.00 0.00 0.00 1 0.34 0.60 543.86 543.86 0.25 0.56 283 .65 2 0.57 1.01 906.43 622.78 0 .27 0.62 337.17 3 0.80 1.41 1269.00 931 .83 0 .33 0 .83 532 .60 4 1.02 1.81 1631 .57 1098.98 0 .35 0.94 631.29 5 1.25 2.22 1994.14 1362.86 0 .39 1.11 779.81 6 1.48 2.62 2356.71 1576.90 0 .42 1.24 895.03 7 1.71 3 .02 2719.29 1824.26 0.46 1.38 1023.40 8 1.93 3.42 3081 .86 2058.45 0.48 1.51 1140.98 9 2.16 3.83 3444.43 2303.45 0.51 1.64 1260.45 Tc= 10 2.39 4.23 3807 .00 2546.55 0.54 1.77 I 1375.89 11 2.28 4.03 3625.71 2249.82 0.51 1.61 1234.58 12 2.16 3.83 3444.43 2209.84 0 .50 1.59 1215.20 13 2.05 3 .63 3263.14 2047.94 0.48 1.50 1135.78 14 1.93 3.42 3081 .86 1946.08 0.47 1.45 1085.01 15 1.82 3 .22 2900.57 1815.57 0.45 1.37 1018.97 16 1.71 3.02 2719.29 1700.32 0.44 1.31 959.66 17 1.59 2.82 2538.00 1578 .34 0.42 1.24 895.79 18 1.48 2.62 2356.71 1460.93 0 .41 1.17 833 .13 19 1.37 2.42 2175.43 1342 .30 0.39 1.09 768 .52 20 1.25 2.22 1994.14 1225.62 0.37 1.02 703 .57 21 1.14 2.01 1812.86 1109.29 0.36 0 .95 637.25 22 1.02 1.81 1631 .57 994.32 0.34 0.87 569 .97 23 0.91 1.61 1450.29 880 .31 0.32 0 .80 501 .31 24 0 .80 1.41 1269.00 767 .69 0 .30 0 .72 431 .25 25 0.68 1.21 1087.71 656 .46 0 .27 0 .64 359.49 26 0 .57 1.01 906.43 546.94 0.25 0.56 285.78 27 0.46 0 .81 725 .14 439.37 0.22 0.47 209.67 28 0 .34 0 .60 543 .86 334.19 0 .19 0 .39 130.57 29 0 .23 0.40 362.57 232 .00 0 .16 0 .29 0 .00 30 0 .11 0 .20 181 .29 181 .29 0.14 0 .24 0 .00 ROUTINGFORA10YEARSTORM Peak Flows Qpre Qpost Weirs (cfs) (cfs) (degrees} 2.08 3.68 25 Time Qpre Qpost Vin Vstor Hstor Qout Vout (min} (cfs} (cfs} {.gf} {.gf} ill} (cfs} {.gf} 0 0 .10 0 .00 0 .00 0 .00 0 .00 0 .00 0 .00 1 0.30 0 .53 473 .14 473.14 0 .23 0.50 272.45 2 0 .50 0 .88 788 .57 516.12 0 .24 0 .53 302 .82 3 0.69 1.23 1104.00 801 .18 0 .30 0.74 490.77 4 0.89 1.58 1419.43 928 .66 0.32 0 .83 569 .11 5 1.09 1.93 1734.86 1165.74 0.36 0 .98 708 .07 6 1.29 2.28 2050.29 1342.22 0.39 1.09 806 .90 7 1.49 2.63 2365.71 1558 .81 0.42 1.22 923 .88 8 1.68 2 .98 2681 .14 1757.27 0.45 1.34 1027.52 9 1.88 3.33 2996.57 1969.05 0.47 1.46 1134.94 Tc= 10 2.08 3.68 3312 .00 2177.06 0.50 1.57 I 1237.67 11 1.98 3.50 3154.29 1916.62 0.47 1.43 1108.63 12 1.88 3.33 2996 .57 1887.94 0.46 1.41 1094.16 13 1.78 3 .15 2838 .86 1744.70 0 .45 1.33 1021.04 14 1.68 2.98 2681 .14 1660.10 0.43 1.28 977.16 15 1.58 2.80 2523.43 1546.27 0.42 1.22 917 .22 16 1.49 2.63 2365.71 1448.50 0.41 1.16 864.85 17 1.39 2.45 2208 .00 1343.15 0.39 1.10 807.42 18 1.29 2.28 2050.29 1242.87 0 .38 1.03 751 .69 19 1.19 2.10 1892 .57 1140.88 0 .36 0.97 693.85 20 1.09 1.93 1734.86 1041.00 0 .34 0 .90 635.94 21 0.99 1.75 1577.14 941 .20 0.33 0.84 576 .67 22 0 .89 1.58 1419.43 842 .76 0.31 0.77 516 .64 23 0 .79 1.40 1261 .71 745 .07 0 .29 0 .70 455.31 24 0 .69 1.23 1104.00 648 .69 0.27 0.63 392.79 25 0.59 1.05 946 .29 553.49 0.25 0 .56 328 .71 26 0 .50 0 .88 788.57 459.86 0 .23 0 .49 262 .93 27 0.40 0 .70 630.86 367 .93 0 .20 0 .41 194.98 28 0.30 0 .53 473 .14 278 .17 0 .18 0 .34 124.36 29 0 .20 0 .35 315.43 191 .07 0 .15 0 .25 0 .00 30 0 .10 0 .18 157. 71 157.71 0 .13 0 .22 0.00 ROUTING FOR A 5 YEAR STORM Peak Flo\NS Qpre Qpost Weirs (cfs) (cfs) (degrees} 1.86 3 .29 25 Time Qpre Qpost Vin Vstor Hstor Qout Vout (min} (cfs} (cfs} .(g} .(g} illl (cfs} .(g} 0 0 .00 0.00 0 .00 0.00 0.00 0 .00 0 .00 1 0.19 0.33 296.10 296.10 0 .18 0 .35 261 .85 2 0 .37 0 .66 592.20 330.35 0.19 0.38 288.98 3 0 .56 0 .99 888.30 599.32 0.26 0 .60 482.86 4 0 .74 1.32 1184.40 701 .54 0 .28 0 .67 550.32 5 0 .93 1.64 1480.50 930.18 0 .33 0.83 693.01 6 1.12 1.97 1776.60 1083.59 0 .35 0 .93 783 .78 7 1.30 2 .30 2072.70 1288.92 0 .38 1.06 900.40 8 1.49 2 .63 2368.80 1468.40 0.41 1.17 998 .56 9 1.67 2 .96 2664.90 1666.34 0.44 1.29 1103.40 Tc= 10 1.86 3.29 2961 .00 1857.60 0 .46 1.40 I 1201 .77 11 1.77 3 .13 2812 .95 1611 .18 0.43 1.26 1074.51 12 1.67 2 .96 2664.90 1590.39 0.43 1.24 1063.56 13 1.58 2 .80 2516 .85 1453.29 0 .41 1.16 990.41 14 1.49 2 .63 2368 .80 1378.39 0.40 1.12 949.73 15 1.40 2.47 2220.75 1271.02 0 .38 1.05 890.43 16 1.30 2 .30 2072 .70 1182 .27 0 .37 1.00 840.46 17 1.21 2 .14 1924.65 1084.19 0 .35 0 .93 784.13 18 1.12 1.97 1776.60 992.47 0 .34 0 .87 730.28 19 1.02 1.81 1628.55 898 .27 0 .32 0.81 673 .67 20 0.93 1.65 1480.50 806.83 0 .30 0.75 617.28 21 0.84 1.48 1332.45 715.17 0 .29 0 .68 559.12 22 0.74 1.32 1184.40 625.28 0.27 0 .62 500.24 23 0 .65 1.15 1036.35 536.11 0.25 0 .55 439 .70 24 0.56 0 .99 888 .30 448.60 0 .23 0.48 377.78 25 0.47 0 .82 740.25 362.47 0 .20 0.41 313 .79 26 0 .37 0 .66 592 .20 278.41 0 .18 0 .34 247.53 27 0 .28 0.49 444 .15 196.62 0 .15 0 .26 178.01 28 0.19 0 .33 296 .10 118 .09 0 .12 0 .18 103.89 29 0.09 0 .16 148.05 44.16 0.07 0 .08 0 .00 30 0 .00 0 .00 0 .00 0 .00 0.00 0 .00 0 .00