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HomeMy WebLinkAboutEast Valley Office Park w BASIS OF DESIGN STORM DRAINAGE SYSTEM EAST VALLEY OFFICE PARK OCTOBER 3, 1989 1. Method of Analysis Drainage calculations were performed using the HEC-1 computer program. The HEC-1 model simulates the surface runoff response of a drainage system to rainfall by representing the drainage system as an interconnected system of subbasins. Results of these calculations are enclosed. 2. Design Storm ri A 24-hour design storm duration was used as a basis for evaluating existing and proposed system capacity and for determining required detention storage. A Soil Conservation Service Type IA precipitation distribution was used in the HEC-1 model to represent typical rainfall distribution west of the Cascades. A Total 24-hour rainfall of 2.0 inches was used for a 2-year storm and 3.4 inches was used for the total 24-hour precipitation for a 25-year storm. These rainfall amounts were obtained from Figures 3.5. 1C and 3.5.1F in the King County Surface Water Design Manual for the Renton area. 3. Analysis Of Existing Conditions Existing storm flow prior to the proposed development of the site was evaluated as a basis for sizing the required detention facilities For analysis purposes, the existing site was subdivided into 2 subbasins, representing the east and west lots, respectively. Both lots are virtually identical , consisting of mostly bare ground with some brush. The soil is moderately compacted and relatively "tight" . Both lots are fairly flat with ground slope at about 1/2 percent. The HEC-1 analysis for existing conditions for a 2-year, 24-hour storm shows a combined flow of 1 .0 cfs off both lots. This flow is the allowable release flow from the control manhole and will be used Basis of Design GSA/FAA Storm Drainage System Page 3 to size the control orifice. 4. Analysis Of Proposed Drainage System For New Development The drainage system for the proposed development has been designed so that storm flows will be released into the existing 60-inch storm drain on S.W. 19th Street. The required detention facilities have been designed to provide detention storage for a 25-year, 24-hour design storm with the allowable release rate not to exceed the existing peak flow for a 2-year storm (1 .0 cfs) . Paved surfaces will be graded to drain to catch basins. The collected runoff will be piped through storm drains. Detention will be accomplished by using the storm drain system, which has been oversized to provide the required detention storage, and surface ponding in the parking lot. Basis of Design GSA/FAA Storm Drainage System Page 4 Flows released from the detention control manhole will be routed to a lift station which will pump into an oil/water separator. The effluent flow from the oil/water separator will then be routed . through a grass-lined swale prior to discharging into the S. W. 19th Street storm drain. For extreme storm events in excess of a 25-year, 24-hour storm, flows will be bypassed from the control structure directly into the S. W. 19th Street storm drain, to avoid ponding in parking area in excess of 6 inches. The enclosed HEC-1 analysis for the developed site for the 25-year, 24-hour storm shows a total combined flow off the site of 5.0 cfs. The required combined detention storage volume for both lots for a 2- year release of 1 .0 cfs is 1 .5 acre-feet (65,300 cu. ft. ) . The combined available detention storage in the underground system and surface ponding is in excess of 65,300 cu. ft. When detention storage exceeds the volume required for a 25-year, 24- hour storm, the overflow will be bypassed directly to the S. W. 19th Street storm drain. I 1 I -- N _- -- -- -. N WJS'tS[ 1:9.17' -• .� - _ M N7!'7S[ 3N'Jp' `If.U'7S[ 7l6.� T ' I r r p ; ( CANDLEWWOOOD HOTEL 1 4 STORY/120 UNIT HOTEL " r I © d d ! 3 86400 8F 11 1 1 STORY OFFICE/INDUSTRIAL I LLI U 36' 4 STORY OFFICE 1 140,926 SF I � Z IGOQ Q • ^s I O • W I= 1 i 55' I '" CC Cr Z I 1 •....�...... . LLJ I 261' t. I u N ♦n I ,S 175 33 e wl a0Mll I d H 1 � t 115' L----- -- -- -- �I N .z al R I� a �� WQ176• Z W W W 256' .......... I . I I 2 ,. , I 3 55' 2 ,m• ! v p 2 l L — ► 1 STORY OFFICE/INDUSTRIAL �• I I Architecture and Planning t 38,2W SF - I earoyce A Berg. A I.A. Principal PROPOSED UPSCALE HOTELY. Ken K. Ch(n. Principal1201 -4th Ave. S. /102 4 BTORY/160 UN17 HOTEL l Seattle,Washington 98134 'p - CE�� - -_ 1 ! (206) 58-1-8030 O O NO DESCRIPTION DATE SW 19TH STREET I _ REVISED 2-12-97 -�- - - - - - __ __ -- -_ __ REVISED 2-18-97 ! HOTELS BY I OFFICE FACILITY i i i OFFICE!FLEX INDUSTRIAL KURT R.JENSEN d ASSOCIATES ARCHITECTS t 4.8 ACRES i 6.49 ACRES 14.6 ACRES BUILDING SF COVERAGE * 38 45%SF BUILDING I I I PARKICOVERAGE G EAREA } *7,285 SF 231 STALLS UP OCALE0H00TcL TEL t 79,768 SF l ' PARKING 348 STALLS 1 PARKING RATIO 3 3.9 STALLS/ 1000 SF 1 I 1 PARKING RATIO 3 2.98 STALLS/ 1000 SF 150 UNITS 1 I ( I ( I I SITE PLAN CONCEPTUAL SITE PLAN _ File:96048\SITE-1R4.OW0 1i50- SCALE 1' • 80' NORTH JOB NO.: 96M SHEET NO OF: DATE: 01-06-97 DRAWN: RAJ ■ CHECK: C - 09-29-1983 1�,25:�1,.. HEM-: INPUT -- LINEID,...... .... 3...... Y....... i,...,.1 f +D:a�Fan I ID - DP.AINAGS ANALYSIS FOR EAS' 2 ID NEC-1 MODEL i2'YE-24 H. STOPM; FOP EXa7 1N* 3 IT 10 , IO 5 f 5 KK SJS . RUNOFF FRO.M S�'-9ASIN Ei; ' S:2E 6 KO 7 BA .011 9 PC 004 .08 .012 .01b :C �36 ;40 IU PC .045 .150 .055 .060 .i;6 1.: :76 .032 .088 .034 Ii PC .100 .106 .113 .1 0 .121 :34 :4: .149 :5S2 .1E44 :2 PC .1726 .1808 .18'?0 .1972 .20E7 .2E62 ..257 .2447 2��: 13 PC .2676 .2810 .2944 .312-4 ...3v4 .:"44 .4154 .44:•4 .4634 .4-163 PC .4902 .5036 .5' ' Z:C, .53C. .5476 =fS4 .5652 .5740 :.J PC .5618 .5916 .G 4 .602 .6!64 ... 3 6 .6'" .vc`� I6 PC .6596 .6668 .6740 .69:2 .b834 .6''156 .7i:0 .7070 .7:27 7184 111 PC .7241 .7298 .7355 .7412 .1469 .7526 .7°32 .71640 .7650 .7740 i8 PC .7790 .7840 .7890 .75O .1990 .8-i40 .8090 .3140 .81'30 .824� 19 PC .828 .832 .836 .34 .844 .848 .3J2 .355 .36 .H-4 :0 PC .868 .872 .87b .19 .084 .a36 5'12 o b .90 .3v4 2! PC .908 .912 .9:6 .'� J24 .:23 .s32 .:�� .'34 .344 22 PC .94a .952 .956 .i6 .964 AE6 .':72 .91E .135 564 1 ? PC .998 .992 .396 1.000 24 L S 0 86 25 UK 550 .005 .20 100 6 RK 500 .005 .025 .011 TRAP .. 27 ':K SUB 2 R;.10FF FROM SUHA-SIN ,WEST SHE) y _9 LS 0 86 �0 UK ;,0 .003 ..0 10 31 Rn 500 ,05 .025 .0.1 'AP 32 KK COM 1 33 KM C3M3INE FLOWS FROM SUBEASINS 1 AIND 34 KO 1 2 35 HC 2 3b Zi Ntsia•„OCT 99r3 r SCHEMATIC DIAGRAM OF "'EAM NETWCFK INPUT * LINE (V) ROUTIN6 (--->) DIVERSION OR PUMP "LOW 1140. (.) CONNECTOR ((---i RETUPN OF DIVERTED OF. PUMPED FLG'i 5 SUB I ( CA5T L.oT ) D , 21 SUB 2 W E-sT "o7 22 CCM I............ y (+tt) RUNOFF ALSO COMPUTED AT THIS LL"CATION 3p s 1� :04.0 `.0 en. LC 10 70 FL.ow 90 :0W" 0. 1 O •Z 0 3 O 'l 0.5 �.6 0.� 4 ,8 0.9 I. o V!40 11G . . . . . . . . . . . i210 14'D v : D '04 0 250 :8 '30C :9C �. 0350 240 �. 0400 25D (.410 2ED )420 4170 .0430 280 �. 0440 2'iG . .0450 30G .0500 31 G . . . . . . . .C510 32D jJ 0520 330 m m :0530 34^v Q x 0540 350 LA � :06,00 37G 0610 390 :0620 350 . .��630 -'cG �. �- . o N :J640 41.0. . . . . . . .� . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .0 1 TI .0110 44. G S 0120 45. D 750' 48. 0 7] . 300 49. -is 10 50. 0 f 0920 51. . . . . . . . . . . . . . . . . . 0 . . . . . . . . . . . . . . . . . . m . . v :5630 52. u LA . 10340 53. m. "HO 54. � ;09G0 55. 0 :0910 56. 0 :0920 51. D 10930 5a. . 10940 59. 0 :0950 60. o�,'r 5 D . 1i000 51. . . . . . . . . . D 6 11020 63. .0 11030 64. 0' 1040 E5. D '050 66. 0 U 100 67. 0 + .1'3-30-1389 io:40:04.06 HEC-: INPUT iNEJ.......I............... .............. ...... .......,........ +DIA6Rn�_ :D :RAINAGE ANALYSIS EAS' ']'=:__ = RK :3 `�EC-1 10DEL -.�4 4, l:F" N.'H 2 -,.E EnBE - Cr'El.FCJ :'10: +.3 . i.jNOFF FROM _ :oH'SiN 1 'QVIEAST ..A4ER _- .:TE. - EP.ST `OT 5A ."I =,9 .4 PC .004 .008 .J'1: ;S :J ,Is PC .045 .050 .055 )60 `65 70 82 !� PC .100 .1106 .113 �r :4411 PC .:6 6 :310 .2344 .3124 .3204 .J6�44 .418» Y45`a loJ» »?E3 .J124 .Jf 21LIr .JvVY •!188 . 1, .++=r •�+�' 1 -2 :15 .35 SJ:3 _:�') s».r .» :5 "C 6596 .6668 .6740 081� .6894 .:956 .7J1? "�10 '::1 .':34 .7298 .7355 .7412 .7469 ."526 .75a3 .7640 .7690 --40 i7 PC .7790 .7840 .7890 .7340 '9'30 .3040 .3090 .3140 .8190 .3--40 ;8 PC .328 .a32 .836 .34 .344 .348 .352 .356 ao 364 PC .868 .872 .876 .a8 .884 .a88 .392 .896 30 .3ii4 20 F'C .303 .312 .316 .:: .324 .928 .332 .;36 .34 :4a 21 PC .948 .952 .956 .16 .964. .968 .912 .576 .3E .384 22 PC .988 .992 .996 1.000 23 LS 0 95 .m4 UK !2 .J13 .10 1J0 . 25 RK 136 .002 .J21 .001 C1RC 5 16 KK SUB 2 RUNOFF FROM SUBBASIN 2 27 BA .001 8 LS 15 .9 UK 112 .013 .10 1.00 30 RK 1 .003 .021 .001 IRC KK SUB RI RUNOFF FROM NORTH ROOF DRAIN 32 BA .0006 33 LS 0 98 34 UK 190 .02 .10 !00 35 RK '38 .005 .021 .0006 IRC i 36 KK COM 1 37 KM COMBINE FLOWS FROM SUBBASINS 1 AND 2 AND NORTH ROOF DRAIN 38 HC 3 . 39 KK SD 1 40 KM ROUTE FLOWS THROUGH 60-INCH STORM DRAIN 41 RK 176 .002 .021 CIRC 5 KK SUB 3 RUNOFF FROM SUBBASIN 3 .;3 BA .001 44 LS 0 95 45 UK .10 '00 »6 K ;36 .002 .02' .001 ;.IRC AGE _:tiE C......,:.......:....... ........4....... ... ,...................3............,.:. .03 J21 .0011 Yc S '� uNGFF %R:M :JUTH OF �RA::� .: :90 10 :VU Q5 .:21 3006 .:RC :3,19INE FLOWS FROM Su 1, 3UBBASINS 3 AND 4, AND SOUTH ROOF DRAIN r, KM ?GUTE FLOWS THROUGH 60—INCH STORM DRAIN 62 RK 120 .302 .021 :IRC 5 03 <K 64 Km "DIVERT" FLOWS FOR COMBINATION WITH FLOWS FROM SUBBASINS 5 AND 6 65 DT r'SC2 DI 2 4 6 2 10 So :K 3 c8 5 RUNOFF FROM SUBBASIN 5 50L' HOST CORNER OF SITE) BA 00i .013 :V i0110 321 t: _':B c RUNOFF FROM SUBBASIN 6 !'.055 95 s' 113 IN RK 1 .003 .021 .00085 CIRC '3 KK COM 3 KM :OMBINE FLOWS FROM SUBBASINS 5 AND 6 .2 ;M ROUTE FLOWS THROUGH 60—INCH STORM DRAIN K E. JV .321 SIR:. TEVE" n •.O rr ;ram O ?ETR._'�e . _iWS wMPU;-:� ,uK 5u . �.a JP, DSD.: ..-.�-.:j ..:Yv': 16.a: -tEC-. :'4PUT :AGE _ _:iE •D...............�....... .......y.......,.,...... .......... .......Z...............i M MBItiE F�a►IS ;=L'? 30 �I"ri C:."FiVE� _=�a -:M _JABASi'dS ` AND :UTE _;CIS 'HROUGH _-:N:H :TERM DRAIN r.ti _4 Z _ K ;T DSD4 3 OF K JO% .')'1 .')0013 .I3C 5 r K _J6 =.'!NGFF -ROMSU66ASIN a 3A .-�0084 ;D 4 LS 0 95 ;s5 UK 100 .015 .10 100 RK : vie :'. .10084 CiRC 10 7 SK C3M 5 ;'? KM COMBINE FLOWS FROM SUBBASINS 1 AND 8 S :;? c '.z .:C:JS THR000H aO-iNCH STORM RAiI RK _ .v02 CIRC kK 'UB 3 RUNOFF FROM SUBBASIN BA .0005 .a UK 53 Ala RK S0 u5 .021 .)005 CI RC ::3 KK 'RETRIEVE' FLOWS COMPUTED FOR SC 4 :? OR DSD4 _. ?K COM 6 r:M :OMBINE FLOWS FRGM SO 4 WI';P, FLOWS F :" c.jABASINS 7,3 AND 3 a KK 3D 6 ROUTE FLOWS THROUGH 1 -?NCH STORM DRAIN '. 5 RK 600? .021 CIRC a • ::-i' E1 :d:�G:Ua,I •EC-. !NFUT '�aE � NE ................................;............... .......".......3................ 1 - ;_„ f;K :UB10 FROM LOADING JOCK AREA J .1•�J4 !! :OMBiNE =LOWS FROM 3D 6 AND SUBBAS:% 1 + .JJ •, rr , 1 ' --jP•OUGH -:NiH STORM DRAIN 03 h TIS i3 THE INFLOW INTO THE CONTROL MH FPOM E, , T _UT _:RC :40 iK :41 -..M JIVE: I' FLOW IN SD i FOR COMBINATION WITH INFLOW FROM THE WEST LuT .»3 Ji +- '44 ."J KK EJB !A U'N0FF FROM SUBBASIN IA (NORTHWEST :3P•NER OF 3ITE; r :46 iA .)01 1»i CS ?5 148 UK 1!2 .113 .Io :00 »� RK l JOB 26 .021 .001 CIRC 5 .00 ?:k: :UB :A RUNOFF FROM SUBBASIN A :51 BA .001 .s•. j :53 JK 112 .013 .10 100 •54 Rk . ;03 :1 .001 CIRC 1 J 1;5 KK SUBRIA RUNOFF FROM NORTH ROOF DRAIN .jV ar+ .�006 15; :S 0 38 UK : 0 VL .1v :00 159 RK iB .305 .021 .0006 ;6 KK COM1A .51 <.:M COMBINE FLOWS FROM SUBBASINS 1A, :A AND 'FORTH ;"F DRAIN 15J KK JJ lA r ; KM =OUTE FLOWS THROUGH 60-INCH STORM DRAIN r .......:......._.......:................Y...............'... ......,...... ,,.,,. :6 F; SUB :A F:US 3U3 3A RUNOFF '=;M :JBBAS:N 4A :5 ..I. tr •v:J •.J .:J 75 kK 003 .021 .0011 IRC �:K RUNOFF FROM SOUTH ROOF DRAIN ;''3 _ 3c ?) RK :B .005 21 005 :RC ;a1 KK :3M 2A 4:M COMBINE FLOWS FROM .., *,A, UBBASINS 4 AND Sl'!'H ROOF TRAIN 183 HC 4 :84 KK 3D :A :95 KM ROUTE FLOWS THROUGH 60-INCH STORM DRAIN KK IBB KM "DIVERT' FLOWS F3R C;;MBINATION WITH FLOWS F:OM S,'BBAS:yS 5A AND ch a 189 JT DSD2A 190 OI 2 4 S 9 10 9! DIG ; 6 8 10 192 KK SUB 5A RUNOFF FROM SUBBASIN 5A (SOUTHWEST ::RNER OF 3:7E' 3 BA 'O1 194 L5 0 35 :95 UK 1:18 .023 .iJ 100 !?6 RK !36 .002 .021 .')O1 ':I:RC 5 191 KK SUB SA RUNOFF 7RCM SUBBASIN 6A i98 BA .00085 LS 0 '35 200 UK 112 .,)13 .10 100 .vi.1 .rlJ liOJ :ikl. • ::3M N ;3 KM COMBINE FLOWS FkOM SU68ASINS 5A AND 6A 205 i;K E0 sA ROUTE FLOWS THROUGH -.0-XX PM LVi n:K ji J02 ,4.1 ;IRC S • ............... .•.... ........ ... R v •.V ~„...Y.4T"C : _'.:WS F"O _D _.� M ROUTE 'LBWS 'w"OUG'r. ,:-!NCH FORM iiFaiN ONS FOR .^.MB:."ri+i: ROM SUBBASiNS .'a AND -A _ D4A Y ^r KK SUB 7A RUNOFF FROM SUBBASIN IA .22 5a .�00'3 95 _:4 JV :10 .'15 .10 100 "5 RK :1? .002 .011 .00073 CIRC . 5 R :UB ,;„ '11NOFF FROM SUBBASIN 3A _A .6484 dill, :a LS 9s :00 :VO _irk RK 1 .003 .021 .0048» :1RC 1 :IM !A --• _,� ;OMBINE FLOWS FROM SUBBASINS ,y AND 3a "ROUTE FLOWS THROUGH 60-INCH STORM DRAIN K -, .001 021 �IRC 1. �O KK "UB 9A RUNOFF FROM SUBBASIN 5A .3 3A .0005 0 95 JK 83 .018 .10 100 RK g0 „705 .01.1 .0005 CIRC 1 ;K "RETR:E'JEl FLOWS "COMPUTED FOR SD4A :13 DR J5D4A :44 YK i3OM 6A _ y "! mW3 »A aiTH . _�1J5 Fr.%M a:bBASI�S a, SA AND A »n yC _:AE _..............._....... ...... .......... 'i V _-- ... 10 =:0" �. w: ;ND _�56r::r :. " rGL!ir 'VlH 9, M =E :NF' .NTU "IE .'NTROL MH FROM wE3T .jT k: 17 ci nn RETRIEVE' .'�;W COMPUTED FOR s'D "T. —4 DR -337, r �V rVJ ,1. .Jig v Ebd ;M COMBINE FLOWS FROM EAST AND WEST LOTS i♦ _ ; �;M i5 :S TrE TCTAL FLOW INTO THE CONTROL MH F ?M THE :AST AND WEST ' �TS M 5UTE :�-MBINEDI ,r;a THPOUGH i.*-".4 STORM PA':4 -0 CONTROL MANHOLE -CUT: „,nR-JR PL �rDL'Jr� J�7 �4 N: : '?. ';ELcASC JAI .OS .65 aE .57 :.uV. • • s • • 3 u a ........................ f • -- �1J5 0 • ;JM 3............ • -- ------ )5D' o :2M. ...... . -SD 4 10 ; •.N �• •. •. ..•.•.•••.•... r EOM 7............ .Jr • , I F Low FROM � A57 �oT :4U • .45 �JB IA % : p :UB A _55 :UBP.IA CUMIA........................ v ,c SUB aA S SUB 4A -p SUBLA 1 _ M Win............ .—I 4A............ .. oD 414 _.� .------- D5D4A . SUB 1A • ' .J� �44 ........................ , 7J OA ...M th............ rKom W EST �oT _ I _1 3.......... .. ♦ • • • • • i • STATION SD 7 Ii 1NF:.Ob OUTFLOW C C S ) 4. ----------.---------.---------.---------.---------. ,.'Ju 4, .rVrJ G1 • • • • • • • :.14 11I . . . . . . . • . • . . • . . . . . . . . . . . • . . . . . . . . I . . . . . . . . . . . . I . . . . . . . . . . . . . I"i . flJ .:10 141 \.A j (D 3 C 19. I 1. . . . . . . . . . . . . 10330 22. I n -n-TV 10340 23. I Tf ` s . 10350 24. I LA 0 . 104u 25 0 . I I0410 26. I 10420 27. I rn; 10430 28. I . 10440 29. 10450 30. I U{• 10500 31. . . •I. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I . . . . . . . I . . 10510 32. I . F r. I I I • i0 510 33. I o . 10530 34• I p �1 �• a 10540 35. I `+ :;;550 10600 37• I. UT 10610 38. I. 10620 39• I (� 10630 40. 10640 41. I1 . . . . . I . . . . . . . . . . . . • . I . . . I . . I . . . I . I . 10650 42. 10700 43. '7iO 44. 1070 45• 740 47. "51 4a. 10800 49. . :OSiO 50, 10820 51. . . . . . I . I . . . . . . . . . • . . . . . . . . . . I . . . . . . . I . . . . . I . . . . . :0830 5 . 10840 53. 'OKC 54, 10900 55. I w 10910 56. HYDROGRArn r,' STATION RE'a 1 C O NTT R•O L M f{ ) +ffffffff+f+ffffffffffffffffffffffff+ffffffffffffffff#f##+ffff}fffffffffffffffffff#ffffffffffff+f+ffffffffffffff+ffft+f#fff+f++}}+t } + MON HRMN ORD OUTFLOW STORAGE STAGE + DA MON HRMN ORi, UT; STORAGE STAGE + DA MON HRMN OR OUTFLOW STGRACE n .1 (ac.-FT.) (Fr.), (►.c:FT.) 0001) ! .. 9.0 + 1 11:'. 68 :.3 11.8 } 1 :220 0020 3 0. .0 9.0 # : 11310 111, i. i8.0 + 2240 :37 ;. ._.: nA r A:.. . 1 } 1 OGJv 4 .:t i.0 + 114'C 7: i.3 •8.: + � 50 13S ;. _._ 1 ,�, ,` n ' ` ., 5 0040 5 G. 0 9.: + liJtJ .. .. 19.1 + 1 2J00 139 .. _ �. 1 0050 6 0. .0 9.0 + 1 1201"+ 73 1. 1.4 18.1 + 1 2310 140 0100 7 0. 0 310 IF 1 1210 14 1. 1.4 18.2 + 2320 141 :. 1 0110 8 0. .0 9.0 f 1 1220 75 1. 1.4 12.2 + 1 2330 14_ 1 0120 9 0. 9.0 f i23'' 76 :. 1.4 18.2 + 1 2340 143 :. 1 0130 10 0. .0 9.0 + 1 12411 .. 1. 1.4 1S.2 + ! 2350 144 :. .5 118.5 0140 11 0. 3.0 f 1 125E 19 1.4 ;8.3 + 2 0000 145 1. 1.5 iS.S i 0150 12 0. 9.0 + i 1300 79 :. 1.4 15.3 + 2 0010 146 ! 0200 i3 0. .0 9.0 + 1.4 18.3 # 2 0020 147 0210 14 0. .v 9.G + ; 1320 :.4 18.3 + 2 OC30 140 0220 15 0. C 9.0 # ! 2 8: :. :.4 :8. + i 0230 16 0. 9.0 f 1 :340 83 i. 1.» 18.3 + _ 0050 15i, :. .5 ;S'.� i 0250 18 0. .0 9.1 # 1 1400 35 1. 1.4 18.4 + 2 olio 152 1 0300 19 0. 1 + 141C 8c 1.5 118.4 # C12_ i53 .. 1.» ic 1 0310 20 0. .0 9.1 f 1420 87 :. 1.5 19.4 f 2 0120 154 n, , Y 6 2 1.-' ! c . r 15 1 OJ:O :1 C. + ,-:. 83 .. 18.4 + 014� iJJ : 0330 22 0. .3 9.1 + 144v "i !. ;.5 18.4 # 2 0150 156 0340 23 0. .0 9.3 f 1 1450 90 1. 1.5 18.4 + 2 0200 151 0350 24 C. 9.4 + 1 1500 91 i. 1.5 18.4 + 215�►✓0210 158 1. 0400 25 0. .1 9.4 # 1 15;0 92 1. 1.5 18.5 f _ 0220 159 c .r• - c , c n 1i 4.J O-.�JO 160 .. ... .6.. 0420 27 9.6 + 1 1530 94 :. 1.5 1E.5 + 0240 16! 0430 H 0. : 9.7 + 1 1540 95 ..5 18.5 # 025'1 162 _ : 0"-- 2. : 9.8 + 1 9E 'S.5 + 030 16' 045� J. 0. 9.? # 166t !S.` + : 21. 1164 0500 31 0. 0510 V. i0.1 + 1620 99 1.5 18. f _ 033'0 1Er �J2v •,. ._ :Q.2 + ! :5:. 10U 1.5 :51 + _ 034'J .0 .. 0530 34 0. _ 10.3 + i 1640 l" 1.5 18.5 + ? 0350 168 0540 335 0. .. 10.4 + 1 1650 :v. 1.5 18.5 + _ 0400 16: _ 0550 36 10.5 + 1 1700 103 i. 1.5 13.5 + _ 0410 17v 060o 3' C. 10.6 + ! i1., iO4 :. 1.5 18.5 + 2 04V 41. .. _.- C. 38 .. 1�.8 + 1 17 : 1.° 18.5 # 0430 111 ..: 0i2' 3r: 0. iG.9 + : 1730 WE 1.5 18.5 f _ 0440 113 _ c,6 J'v YV V. .v :1.J + 'Yl% ... .. ..J . .., + V4J�+ .:•t .. .._ ..._ J• u6°0 42 Jv •`9 !.5 !S.` + ^5i;' 116 i.. . L. 4S 0800 4' : 0810 5!: .. !4 _ ± 1920 .77.` U6..� 51 .. ... 14.J + i�JV 11: .. .... :G.S + 064•, 1E .. .. . . . J: • r 1 08YI a n_ _ C JJ ,.0 1Y.6 0100 to, r _ RUNOFF SUMMARY FLOW IN CUBIC FEET PER SECOND TIME IN HOURS, AREA IN SQUARE MILES 1 PEAK TIME OF AVERAGE FLOW FOR MAXIMUM PERIOD BASIN MAXIMUM TIME OF OPERATION STATION FLOW PEAK 6-HOUR 24-HOUR 72-HOUR AREA STAGE MAX STAGE ( cF-5) HYDROWH AT SUB 1 1. 7.83 0. 0. 0. .00 HYDROGRAPH AT SUB 2 1. 7.83 0. 0. 0. .00 r HYDROGRAPH AT SUB R1 0. 7.83 0. 0. 0. .00 3 COMBINED AT CON 1 1. 7.83 0. 0. 0. .00 ROUTED TO SD 1 1. 7.83 0. 0. 0. .00 1 HYDROGM AT SUB 3 1. 7.83 0. 0. 0. .00 HYDROGRAPH AT SUB 4 1. 7.83 0. O. 0. .00 1 .00 HYDROGRAPH AT SUB R2 0. 7.83 0. 0. 0. 0 4 COMBINED AT CON 2 3. 7.83 1. 0. 0. .01 ROUTED TO SD 2 3. 7.83 1. 0. 0. .01 t .01 DIVERSION TO DSD2 3. .17 1. 0. 0. HYDROGM AT 0. .17 0. 0. 0. .01 HYDROGRAPH AT SUB 5 1. 7.83 0. 0. 0. .00 1 HYDROGRAPH AT SUB 6 0. 1.83 0. 0. 0. .00 2 COMBINED AT CON 3 1. 7.83 0. 0. 0. .00 ROUTED TO SO 3 1. 7.83 0. 0. 0. .00 HYDROGRAPH AT 3. 7.83 1. 0. 0. .00 it 2 COMBINED AT CON 4 4. 7.83 1. 1. 0. .00 ROUTED TO SD 4 4. 7.83 1. 1. 0. .00 it DIVERSION TO DSD4 4. .17 1. 1. 0. .00 HYDROGRAPH AT 0. .17 0. 0. 0. .00 HYDROGRAPH AT SUB 7 0. 7.83 0. 0. 0. .00 HYDROGRAPH AT SUB 8 0. 7.83 0. 0. 0. .O0 2 COMBINED AT COM 5 1. 7.83 0. 0. 0. .00 ROUTED TO SO 5 1. 7.83 0. 0. 0. .00 HYDROGRAPH AT SUB 9 0. 7.83 0. 0. 0. .00 HYDROGRAPH AT 4. 7.83 1. 1. 0. .00 ROUTED TO _` SD 6 5. i.13 t..: 1. 1. 1. .00 HYDROGRAPH AT SUB10 0. 7.83 0. 0. 0. .00 2 COMBINED Kr- CON 7 7.83" 1: f. 1, .00 X ROUTED TO SD 7 S. 7.83 1. 1. 1. .00 f e,o, F Y a-,, E a 51' L.of DIVERSION TO DSD7 5. .17 1. 1. 1. .00 HYDROGRAPH AT 0. .17 0. 0. 0. .00 HYDROGRAPH AT SUB IA 1. 7.83 0. 0. 0. .00 HYDR06RAPH AT SUB 2A 1. 7.83 0. 0. 0. .00 HYDROGIWH AT SUBRIA 0. 7.83 0. 0. 0. .00 3 COMBINED AT COM1A 1. 7.83 0. 0. 0. .00 ROUTED TO SD IA 1. 7.83 0. 0. 0. .00 HYDROGRAPH AT SUB 3A 1. 7.83 0. 0. 0. .00 HYDROGRAPH AT SUB 4A 1. 7.83 0. 0. 0. .00 HYDROGRAPH AT SUBR2A 0. 7.83 0. 0. 0. .00 4 COMBINED AT COM 2A 3. 7.83 1. 0. 0. .01 ROUTED TO SD 2A 3. 7.83 1. 0. 0. .01 DIVERSION TO DSD2A 3. .17 1. to 0. 0. .01 HYDROGRAPH AT 0. .17 0. 0. 0. .01 HYDROGRAPH AT SUB 5A 1. 7.83 0. 0. 0. .00 HYDROGRAPH AT SUB 6A 0. 7.83 0. 0. 0. .00 2 COMBINED AT COM 3A 1. 7.83 0. 0. 0. .00 ROUTED TO SD 3A 1. 7.83 0. 0. 0. .00 HYDROGRAPH AT 3. 7.83 1. 0. 0. .00 2 COMBINED AT COM 4A 4. 7.83 1. 1. 0. .00 ROUTED TO SD 4A 4. 7.83 1. 1. 0. .00 DIVERSION TO DSD4A 4, .17 1. 1. 0, .00 HYDROGRAPH AT 0. .17 0. 0. 0. .00 HYDROGRAPH AT SUB 7A 0. 7.83 0. 0. 0. .00 HYDROGRAPH AT SUB 8A 0. 7,B3 0. 0. 0. .00 2 COMBINED AT COM SA 1. 7.83 0. 0, 0. .00 ROUTED TO SD 5A 1. 7.83 0. 0. 0. .00 ,. 1." 1. 1. S. - • 3 COMBINED AT COM 6A 7.83 1. 1. 1 .00 ROUTED TO SD 6A 5. 7.83 1. 1. 1. .00 HYDR06RAPH AT SUB10A 0. 7.83 0. 0. 0. .00 • 2 COMBINED AT COM 7A 5. 7.83 1. 1. 1. .00 POUTED TO SD 7A 5.\ 7.83 1. 1. 1. 0u + = Ptak F (ow Fr o�, we-SY HYDROGRAPH AT 5. 7.83 1. 1. COMBINED AT COM 8 10. 7.83 3. 1. 1. .00 ROUTED TO SD 8 10.E 1.83 3. 1. 1. .00 ��- co �,r�d P�,� Fio,� fi� �)ofik ! ROUTE:? TO RES 1 1. 16.33 1. 1. 1. .00 18.51 17.17 7-2-- `(r . ���4Qs� f �-r,. ��,, �a � M14 +++ NORMAL END Of HEC-1 +++ a THE AUSTIN COMPUTATION COMPANY sHE DESIGNERS • ENGINEERS • BUILDERS LISTED BY �--, OWNER—':,:: WNER - r EST. NO. CHECKED BY QQ {� LOCATION SHEET I OF CONTRACT NO. S�(,� 1 DATE_1q lJ0'-TY0 p n,5 e. Conn p,ate_ O f i c e_ � i '< r , ���-r � S i 9�� � ►'i{r tee. Q wh e,r e- Q = I . o 5 C Z -Ye_ca r 5Tov, I I o c, e— Rp I e__Gr� p__ ) h - (� ax ►'m0 Fa i F_ I Z-V . — 0AI( e.t e_ Info rr I P = 18 . 5 - 9 , 0 . 0652 S.F. 8 8 1 F7 . U S i'I+ c-h O r i f i " -_. D i a'ram e_ e-r FORM NO.48 a THE AUSTIN C0�IMIPUl ;.A ; iG,,l COMPANY DESIGNERS `ENGINEERS BUILDERS lr p LISTED BY L� �1 OWNER �0.5l V �I }IG�' `4V EST. NO. CHECKED BY LOCATION SHEET�OF_�.__ CONTRACT NO.W S-g9 q`} DATE t0 Y.J - `�. 1� I 11 Yi) tJ �-- I'=✓C1) I ti� 1 , �_ . 5tov Dra ,�,S . -1 -l"C,� : z, ( 3yo c .F ) X �8 .Z6 = 19 , Z ► 0 C .F. 390 LF ) k o 785 s -7 , Izoc .F. I , 31 A,-- FT. ) J I J Allow o to G - i ve. ff - � . Total Po-ra ;-r+ � OJLAWer For [:�,otk )or-5 a TolaI Nvaila sera jt, V , 1. ,!, _ .� s , 3 � 0 �� F J lora e.. I�egVlY �dl f vam H EC- Anal SAS - I C.ow.�� r,e� A ✓a; Iabl ?- j;orar� ��olUr„� r0r �ot� LlreA r- GI VGA I,,s e—, 7st. 4oyo3e— I'^ I FORM NO.48