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HomeMy WebLinkAboutSWP272284(1) f FOR DISTRIBUTION TO: Water Utility Building Division Wastewater Utility Public Works Constr Inspector Surface Water Utility Fire Prevention Maintenance Services Transportation Systems Profecr: ()tow HAk.0 2c-; 7 Location: N C k ST Attached please find copies of: PERMIT ® BILLS OF SALE RECEIPT ® COST DATA INVENTORY Y LETTER OF SPECIAL BILLING EASEMENTS) STUB SERVICE AGREEMENT ® COPY OF AS-BUILT H PRECON NOTES (say PRECON ATTENDEES DRAINAGE REPORT MEMO - WATER BREAKDOWN MAP WITH NEW MAINS AND VALVES 0 OTHER Dare: /- 2 7- 7 ::%:FKEC0N:0ISTFR14 i DODDS ENGINEERS, INC. --- CIVIL ENGINEERING S U R V EYING PLANNING i C ®5 1996 v�rLIJ EROSION/SEDIMENTATION CONTROL CALCULATIONS FOR THE ORCHARDS SECTORS E & F RENTON, WASHINGTON Date: December 5, 1996 �` Project No.: 95054 Prepared by: Brennan P. Taylor, E.I.T. r z: Approved by: Edgar T. Jones, P.E. ;¢ �2 3132�o.• �` EXAIREs , Q 4205 'I 48TH AVE. N.E., SUITE 200 - BELLEVUE, WA 98007 (206) 885-7877 FAX: (206) 885-7963 _ Q = D D D D S ENGINEERS, INC. J O B NO. CIVIL ENGINEERING S U R V E Y I N G P L A N N I N G DATE I 4205 146TH AVE. N.E., SUITE 200 - EIELLEVUE, WA 90007 (206( EIB5-7877 OR 454-3743 BY oRCV-\PF-V-�>s V-�7 !F- EIZo5 t o ht_Cor.UUL __ p ES ( C d.u(—v L-Lj►c)f-1 S Ti-t E f✓ PLC)N /SCI)i rA tJTA-T t O q DE S!E'l ! PM- T N r-7 <<19 Q- ()PIDA-TC' 70 C 14APTCR 5 OF 7 4 E- Kit, 6 WA ool? _ • �GY.K.�D CONS'1r2UC.Ttc�N GG1J'r_t2.ANC,G AtJD St�T. F=t;ti1G� Wt'�f�.E 0 Vu ,t,11 YNh '\2c SED�rnr`�JT" '1 fLl�nlS�o R.T i u(IS", w E-5-F-E S PO--t Ft EC, -10 St LT,t-NDC-T1 P%Jt4 t5F G -T,t7 "f NC QED tM e-kff- 1-0 Ad D . S iTE W i Lt_ U 5& A 5�` Dtrvl t�`r PO 4D 6 OCA U D I n! T#6 ✓/M AFC a— A �;CD i M CWT �.-0A1 '&j L FRonf pe)) 10 t�JILL �3 '7A?1,e07-Are/lr ' J��1 Nit-�T `�D►�)� CA I.C,U LET I Cat�S TFE POMP tAJILt_ EE _,\'z--"O 50CH -THAT 2080 S.F, OF PoNp A2EEA wtu— Ie FTZ-o1( t o e D FOc- eju-- ( CFS c-F Ff�-'O DEV Lops p \-*vS Fo(Z-'r Az- 'Zy?- )24 Oyr- STDR M \EV6--7J-T, -F4E F"0LL,0 VJl l(- t-)AS VSE iD -ro 6REA-1E A RuNoF>F: 10 \dA i Cr2- VjoaLKS .. Asa-E Acx-es = 7 Do/c:jA 1< cr>JTi RE stfilZ WIL,I, P,C GLC D AND PEvEwPEr->. — l� Afm.v = 8.9-4.°c8- MZAC CN - 8co1 G�SSCA��t f c�a,s`ctSo►�S Tc fA C'�> r OoWl sMva 1 I VC SHEET OF 7 r 12/ 4/96 Dodds Engineers, Incorporated page 1 ORCHARDS E/F BASIN SUMMARY BASIN ID: DE002 NAME : DEVEL COND 2YR/EROSION CONTROL SBUH METHODOLOGY TOTAL AREA. . . . . . . : 8 . 90 Acres BASEFLOWS : 0 . 00 cfs RAINFALL TYPE . . . . : USER1 PERVIOUS AREA PRECIPITATION. . . . : 1 . 98 inches AREA. . : 3 . 92 Acres TIME INTERVAL. . . . : 10 . 00 min CN. . . . : 86 . 00 TIME OF CONC. . . . . : 10 . 00 min IMPERVIOUS AREA ABSTRACTION COEFF: 0 .20 AREA. . : 4 . 98 Acres CN. . . . . 98 . 00 PEAK RATE : 2 . 95 cfs VOL: 1 . 00 Ac-ft TIME : 480 min T r: �'NSt c�t�1 s C7F 7 E P2o v r nEf� S��Di rA �-rj Par.!p Mz6 t2--3 X 5D! AT THS `a-TAOQDPIPE bJb"Y�.Fw d SA PRUVtpm t23'� 5V' - (p I S70 S F v- d 3.S ' r2eFl-\1 vvtvS T2.oviVC-0 FV-DV-A sT-A0DP,)PE TCi Qphln � V� C..�T -Zetlt • r �►�. c .U/1� l- tJ�t r ���o�/r�Er� ��C3 fir/ r r p nlr7f /'' T2. TNT ��`� i�'YL.irJG �R►Ft - F9l� t.tr \36 St'LEV fkC_co .Arti1 U 7D. O — �'i t� ��h+ _ (9 t So 00313 -2 ' 4- -7 in ir 2- U Z DODDS ENGINEERS, INC. CIVIL ENGINEERING SURVEYING PLANNING CrTY OF REMON 'Wl:OF F v E D 0EC 0 5 1996 DIVISION STORM. DRAINAGE CALC..ULATIONS IFOR ME ORCHARDS Renton. Washingfull Pre-pared By: Gary R. Shawnbroich, T.A Jones, P.E,., lroved By: Edgai. Pro.ject No. 83008 Daun. April 4, 1994 4- 4-9-+ 4205 14BTH AVE. N.E., SUITE 200-BELLEVUE, WA 98007 [206] BE15-7877 OR 454-3743 FAX:12061 BB5-7963 4. DEVELOPED SITE HYDROLOGY As previously discussed, the developed drainage system will continue to split the site into two drainage basins. a. WEST BASIN: The proposed design for the west basin involves the use of the existing wetland #1 for detention. Due to site constraints, a developed area slightly less than the existing west basin will be tributary to the detention system. The remaining area will be directed to the main east detention pond, but the developed discharges will be designed to match the existing peak flows of either basin. "Z": 13.6 acres, tributary to main west detention system (100) 4.70 ac, impervious @ CN =98 7.20 ac, landscaping/wetland/brush @ CN = 84.5 Time of Concentration: estimated at 25 minutes b. EAST BASIN: The developed east basin will be divided into three sub-basins, each tributary to one of the enhanced wetlands to be used for storm drainage detention/water quality facilities. "W: 2.80 acres, tributary to the southeast detention system (300) 1.22 ac, impervious @ CN = 98 1.60 ac, landscape/brush @ CN = 85 Time of Concentration: estimated at 20 minutes "W": 8.1 acres, tributary to the second wetland (400) 3.6 ac, impervious @ CN = 98 4.5 ac, landscaping/brush/wetland @ CN = 85 Time of Concentration: estimated at 25 minutes "X": 14.52 acres, tributary to the first wetland (200) 4.72 ac, impervious @ CN = 98 9.8 ac, landscaping/brush/wetland @ CN = 85 Time of Concentration: estimated at 30 minutes "Y": 23.3 acres, tributary to the third wetland (300) 10.4 ac, impervious @ CN = 98 12.9 ac, landscaping/brush/wetland @ CN = 85 Time of Concentration: estimated at 30 minutes A developed drainage map is included in this section along with Basin Summary printouts and basin flow summaries. 17 JL e II • n w 1r zo a• sz r k, _\'Ii ' Y °•{ �. -� ,•..H is La�"Q "_ Jll • cam, „r �,: l 10.,. l / / ` zn,'�j y •� \ •,'^1� ,y� ,9 �`•�t ' l� i ,ter,r ,� �;` "'`�,,,�� � �,:"�.' G `• -� .��4� 4= j 97- � ce ,• y`- \g gib ' 00 5 4,12 •" Tom_ - .--�� �Y ' I � 1 1 s ., 300 DEVELOPED ONSITE BASINS I r� DEI #88008 / THE ORCHARDS 2/5/92 BY:GRS E. ONSITE DETENTION CALCULATIONS 1. ROUTING SUMMARY A summary table of the resultant peak flows is attached below. THE ORCHARDS DEI PROJECT NO. 88008 4-A r-94 WEST EAST BASIN BASIN EX. 1/2 2 YR PEAK FLOW RATE 1.7 cfs 2.2 cfs DEV. 2 YR PEAK RELEASE RATE 1.7 cfs 2.2 cfs EX. 2 YR PEAK FLOW RATE 3.4 cfs 4.1 cfs DEV. 10 YR PEAK RELEASE RATE 3.4 cfs 4.0 cfs EX. 100 YR, 24 HR PEAK FLOW RATE 16.1 cfs 23.3 cfs DEV. 100 YR, 24 HR PEAK RELEASE RATE 12.3 cfs 14.6 cfs EX. 100 YR, 7 DAY PEAK FLOW RATE 13.4 cfs 19.5 cfs DEV. 100 YR, 7 DAY PEAK RELEASE RAT 12.5 cfs 18.4 cfs 2 YR DETENTION VOLUME cu-ft 21,166 221,309 10 YR DETENTION VOLUME (cu-ft) 35,644 342,702 100 YR, 24 HR DETENTION VOLUME cu-ft 62,390 428,100 100 YR, 7 DAY DETENTION VOLUME (cu-f, 63,508 450,568 NOTE: For the developed 2yr routing, the 1/2 2yr offsite basin was used with the 2yr onsite basins. Similarly, for the developed 10yr routing, the 2yr offsite basin was used with the 10yr onsite basins. Since the routing for these two storms involves matching a smaller storm event peak, this method of analysis has to be incorporated in order to avoid needlessly detaining flows from all of the offsite areas. Also, these upstream offsite areas will eventually be developed and held to the same detention requirements as this site, so this approach will better model future drainage patterns. b. ** Existing East Basins ** 1) Move basin "E" to HG#6. 2) Route HG#6 through Existing depression "50"; Discharge =HG#7. 3) Combine basins "01", "F" and HG#7 =HG#8. 4) Route HG#8 through Existing depression "40"; Discharge = HG#9. 5) Combine basins "02" and "B" = HG#10. 6) Route HG#10 through Existing depression "31"; Discharge =HG#11. 7) Add basin "C" and HG#11 = HG#12. 8) Route HG#12 through Existing depression "30"; Discharge =HG#13. 9) Combine basin "D", HG#9 and HG#13 =HG#14. 10) Route HG#14 through Existing depression "20"; Discharge =HG#15. 11) Add basins "03", "G" and HG#15 =HG#16. 12) Combine basins "04", 1105", "I" and HG#16 =HG#17. 13) Add basins "H", "06" and HG#17 =HG#1, 2, 3 or 4 (depending on the storm). TOTAL DISCHARGE HYDROGRAPHS: HG#1 =Ex. 1/2 2yr discharge hydrograph HG#2 =Ex. 2yr discharge hydrograph HG#3 =Ex. 100yr, 24hr discharge hydrograph HG#4 =Ex. 100yr, 7day discharge hydrograph NOTE: 1/2 2yr routing uses "-A2" basins throughout and the 2yr routing uses "-A" basins. DDODS ENGINEERS, INC. JOB NO. Dp'cos CIVIL ENGINEERING S U R V E Y I IN G P L A N N I N G DATE 4205 14BTH AVE. N.E., SUITE 200 - BELLEVUE. WA 98007 [206) BB5-7877 OR 454-3743 BY ZY- EA�—5-1 (oz03 5 In L 1734 11 lolz4- 2,95 100)7-4 3,95 11 IW/70,1 '3,9 oil Al SHEET --1 —OF D D D D S ENGINEERS, INC. J O B N O. 21EC06 CIVIL ENGINEERING SURVEYING PLANNING DATE IIZ-3/g 4205 148TH AVE. N.E., SUITE 200 - BELLEVUE. WA 96007 -r-- 12061 EIB5-7677 OR 454-3743 BY C7�5 Off- �� d(p 13 11z Z oz ►4 Z :7700 r )1 -wv "10 oo / av-1 8 (�- 10 Z7 D �zi P21,(01)'/) z r� I SHEET 7 OF L Q - D ODD S ENGINEERS, INC. JOB NO. -- CIVIL ENGINEERING S U R V E Y I N G P L A N N I N G OAT E 4205 148TH AVE. N.E., SUITE 200 - BELLEVUE. WA 98007 (206) 865-7B77 OR 454-3743 B Y LEVEL POOL TABLE SUMMARY MATCH INFLOW -STO- -DIS- <-PEAK-> STORAGE <--------DESCRIPTION---------> (cfs) (cfs) --id- --id- <-STAGE> id VOL (cf) DEV WEST 2YR ................. 1.72 3.67 100 110 396.79 5 21166.70 DEV WEST 10YR ................ 3.44 7.11 100 110 397.45 6 35644.43 DEV WEST 100YR ............... 16.13 18.09 100 110 398.47 7 62389.85 DEV WEST 100YR,7DAY .......... 13.40 14.20 100 110 398.50 8 63508.57 HYDROGRAPH SUMMARY PEAK TIME VOLUME HYD RUNOFF OF OF Contrib NUM RATE PEAK HYDRO Area cfs min. cf-AcFt Acres --------------------------------------------- --------------------------------------------- 1 1 . 720 540 72677 cf 62 . 90 2 3 . 440 540 145353 cf 62 . 90 3 16 . 128 500 488186 cf 62 . 90 4 13 . 396 3360 1403144 cf 62 . 90 5 1 . 687 930 122774 cf 60 . 10 6 3 . 395 780 207699 cf 60 . 10 7 12 . 338 560 504385 cf 60 . 10 8 12 . 547 3420 1414844 cf 60 . 10 10 3 . 672 480 122777 cf 60 . 10 11 7 . 105 480 207699 cf 60 . 10 12 18 . 087 490 504352 cf 60 . 10 13 14 . 199 3360 1414253 cf 60 . 10 SHEET OF ® D O O O S ENGINEERS, INC. JOB NO. CIVIL ENGINEERING SURVEYING PLANNING OAT E 4205 146TH AVE. N.E., SUITE 200 - BELLEVUE. WA 9B007 (206( 685-7677 OR 454-3743 B Y SAS� ROUTING COMPARISON TABLE MATCH INFLOW STO DIS PEAK BUT DESCRIPTION PEAK PEAK No. No. STG OUT HYD ---------------------------------------------------------------------- ---------------------------------------------------------------------- POND #1, 2YR 2.22 3.97 200 210 399.59 1.52 18 POND #3, 2YR 2.22 2.42 400 400 397.26 1.95 19 POND #2, 2YR 2.22 7.00 300 310 394.27 1.14 9 POND #3, 10YR 2.22 4.25 400 400 398.21 4.03 19 POND #2, 10YR 4.10 12.19 300 310 395.10 3.29 10 POND #3, 100YR 2.22 12.31 400 400 398.84 11.98 19 POND 112, 100YR 23.27 21.35 300 310 395.48 11.86 11 POND #1, 100YR-7D 19.46 11.91 200 210 400.17 10.62 18 POND #3, 100YR-7DAY 2.22 11.87 400 400 398.81 11.61 19 POND #2, 100YR-7D 19.46 18.64 300 310 395.61 16.02 12 PEAK TIME VOLUME HYD RUNOFF OF OF Contrib NUM RATE PEAK HYDRO Area cfs min. cf-AcFt Acres 1 2 .221 1440 132389 cf 113 . 62 2 4 . 095 490 239044 cf 113 . 62 3 23 .274 520 829896 cf 113 . 62 4 19. 459 3360 2445974 cf 113 . 62 5 2 . 217 480 212560 cf 116. 42 6 4 . 038 1440 369605 cf 116. 42 7 14 . 567 840 895085 cf 116. 42 8 18 . 418 3480 2945489 cf 116 . 42 SHEET OF 4/ 4/94 Dodds Engineers, Incorporated page 5 THE ORCHARDS -- 88008 DRAINAGE ANALYSIS --------------------------------------------------------------------- --------------------------------------------------------------------- STAGE STORAGE TABLE CUSTOM STORAGE ID No . 100 Description: WEST WETLANDS/DETN STAGE <----STORAGE----> STAGE <----STORAGE----> STAGE <----STORAGE----> STAGE <----STORAGE----> (ft) ---cf--- --Ac-Ft- (ft) ---cf--- --Ac-Ft- (ft) ---cf--- --Ac-Ft- (ft) ---cf--- --Ac-Ft- ------------=------ ----------------------=-----------------------=-mama---------------m__ 395.24 0.0000 0.0000 396.50 15401 0.3536 397.80 43676 1.0027 399.10 81527 1.8716 395.30 6.0000 0.0001 396.60 17356 0.3984 397.90 45989 1.0558 399.20 84547 1.9409 395.40 16.000 0.0004 396.70 19311 0.4433 398.00 48301 1.1088 399.30 87568 2.0103 395.50 951.00 0.0218 396.80 21266 0.4882 398.10 51322 1.1782 399.40 90588 2.0796 395.60 1886 0.0433 396.90 23221 0.5331 398.20 54342 1.2475 399.50 93609 2.1490 395.70 2821 0.0648 397.00 25176 0.5780 398.30 57363 1.3169 399.60 96629 2.2183 395.80 3756 0.0862 397.10 27489 0.6310 398.40 60383 1.3862 399.70 99650 2.2876 395.90 4691 0.1077 397.20 29801 0.6841 398.50 63404 1.4555 399.80 102670 2.3570 396.00 5626 0.1292 397.30 32114 0.7372 398.60 66424 1.5249 399.90 105691 2.4263 396.10 7581 0.1740 397.40 34426 0.7903 398.70 69445 1.5942 400.00 108711 2.4957 396.20 9536 0.2189 397.50 36739 0.8434 398.80 72465 1.6636 396.30 11491 0.2638 397.60 39051 0.8965 398.90 75486 1.7329 396.40 13446 0.3087 397.70 41364 0.9496 399.00 78506 1.8022 4/ 4/94 Dodds Engineers, Incorporated page 1 THE ORCHARDS -- 88008 DRAINAGE ANALYSIS --------------------------------------------------------------------- --------------------------------------------------------------------- STAGE STORAGE TABLE CUSTOM STORAGE ID No . 200 Description: NORTH/EAST WETLAND/DETN STAGE <----STORAGE----> STAGE <----STORAGE----> STAGE <----STORAGE----> STAGE <----STORAGE----> (ft) ---cf--- --Ac-Ft- (ft) ---cf--- --Ac-Ft- (ft) ---cf--- --Ac-Ft- (ft) ---cf--- --Ac-Ft- 398.70 0.0000 0.0000 399.60 28546 0.6553 400.50 101107 2.3211 401.40 184548 4.2366 398.80 1129 0.0259 399.70 35097 0.8057 400.60 110378 2.5339 401.50 193820 4.4495 398.90 2258 0.0518 399.80 41648 0.9561 400.70 119650 2.7468 401.60 203091 4.6623 399.00 3387 0.0778 399.90 48200 1.1065 400.80 128921 2.9596 401.70 212362 4.8752 399.10 7109 0.1632 400.00 54751 1.2569 400.90 138192 3.1725 401.80 221633 5.0880 399.20 10830 0.2486 400.10 64022 1.4697 401.00 147463 3.3853 401.90 230905 5.3008 399.30 14552 0.3341 400.20 73293 1.6826 401.10 156735 3.5981 402.00 240176 5.5137 399.40 18273 0.4195 400.30 82565 1.8954 401.20 166006 3.8110 399.50 21995 0.5049 400.40 91836 2.1083 401.30 175277 4.0238 4/ 4/94 Dodds Engineers, Incorporated page 2 THE ORCHARDS -- 88008 DRAINAGE ANALYSIS --------------------------------------------------------------------- --------------------------------------------------------------------- STAGE STORAGE TABLE CUSTOM STORAGE ID No. 300 Description: STAGE <----STORAGE----> STAGE <----STORAGE----> STAGE <----STORAGE----> STAGE <----STORAGE----> (ft) ---cf--- --Ac-Ft- (ft) ---cf--- --Ac-Ft- (ft) ---cf--- --Ac-Ft- (ft) ---cf--- --Ac-Ft- ------------------ 390.80 0.0000 0.0000 394.60 229030 5.2578 398.50 648613 14.890 402.40 1039390 23.861 390.80 0.0000 0.0000 394.70 241635 5.5472 398.60 658337 15.113 402.50 1049938 24.103 390.90 2542 0.0583 394.80 254240 5.8365 398.70 668062 15.337 402.60 1060485 24.345 391.00 5083 0.1167 394.90 266845 6.1259 398.80 677786 15.560 402.70 1071033 24.588 391.10 7625 0.1750 395.00 279450 6.4153 398.90 687511 15.783 402.80 1081580 24.830 391.20 10167 0.2334 395.10 292055 6.7047 399.00 697235 16.006 402.90 1092128 25.072 391.30 12708 0.2917 395.20 304660 6.9940 399.10 706960 16.230 403.00 1102675 25.314 391.40 15250 0.3501 395.30 317265 7.2834 399.20 716684 16.453 403.10 1113223 25.556 391.50 17792 0.4084 395.40 329870 7.5728 399.30 726409 16.676 403.20 1123770 25.798 391.60 20333 0.4668 395.50 342475 7.8621 399.40 736133 16.899 403.30 1134318 26.040 391.70 22875 0.5251 395.60 355080 8.1515 399.50 745858 17.123 403.40 1144865 26.282 391.80 25417 0.5835 395.70 367685 8.4409 399.60 755582 17.346 403.50 1155413 26.525 391.90 27958 0.6418 395.80 380290 8.7303 399.70 765307 17.569 403.60 1165960 26.767 392.00 30500 0.7002 395.90 392895 9.0196 399.80 775031 17.792 403.70 1176508 27.009 392.10 36645 0.8413 396.00 405500 9.3090 399.90 784756 18.016 403.80 1187055 27.251 392.20 42790 0.9823 396.10 415225 9.5322 400.00 794480 18.239 403.90 1197603 27.493 392.30 48935 1.1234 396.20 424949 9.7555 400.10 804205 18.462 404.00 1208150 27.735 392.40 55080 1.2645 396.30 434674 9.9787 400.20 813929 18.685 404.10 1218698 27.977 392.50 61225 1.4055 396.40 444398 10.202 400.30 823654 18.908 404.20 1229245 28.220 392.60 67370 1.5466 396.50 454123 10.425 400.40 833378 19.132 404.30 1239793 28.462 392.70 73515 1.6877 396.60 463847 10.648 400.50 843103 19.355 404.40 1250340 28.704 392.80 79660 1.8287 396.70 473572 10.872 400.60 852827 19.578 404.50 1260888 28.946 392.90 85805 1.9698 396.80 483296 11.095 400.70 862552 19.801 404.60 1271435 29.188 393.00 91950 2.1109 396.90 493021 11.318 400.80 872276 20.025 404.70 1281983 29.430 393.10 98095 2.2520 397.00 502745 11.541 400.90 882001 20.248 404.80 1292530 29.672 393.20 104240 2.3930 397.10 512470 11.765 401.00 891725 20.471 404.90 1303078 29.915 393.30 110385 2.5341 397.20 522194 11.988 401.10 902273 20.713 405.00 1313625 30.157 393.40 116530 2.6752 397.30 531919 12.211 401.20 912820 20.955 405.10 1324173 30.399 393.50 122675 2.8162 397.40 541643 12.434 401.30 923368 21.198 405.20 1334720 30.641 393.60 128820 2.9573 397.50 551368 12.658 401.40 933915 21.440 405.30 1345268 30.883 393.70 134965 3.0984 397.60 561092 12.881 401.50 944463 21.682 405.40 1355815 31.125 393.80 141110 3.2394 397.70 570817 13.104 401.60 955010 21.924 405.50 1366363 31.367 393.90 147255 3.3805 397.80 580541 13.327 401.70 965558 22.166 405.60 1376910 31.610 394.00 153400 3.5216 397.90 590266 13.551 401.80 976105 22.408 405.70 1387458 31.852 394.10 166005 3.8110 398.00 599990 13.774 401.90 986653 22.650 405.80 1398005 32.094 394.20 178610 4.1003 398.10 609715 13.997 402.00 997200 22.893 405.90 1408553 32.336 394.30 191215 4.3897 398.20 619439 14.220 402.10 1007748 23.135 406.00 1419100 32.578 394.40 203820 4.6791 398.30 629164 14.444 402.20 1018295 23.377 394.50 216425 4.9684 398.40 638888 14.667 402.30 1028843 23.619 4/ 4/94 Dodds Engineers, Incorporated page 3 THE ORCHARDS -- 88008 DRAINAGE ANALYSIS --------------------------------------------------------------------- --------------------------------------------------------------------- STAGE STORAGE TABLE CUSTOM STORAGE ID No . 400 Description: EAST WETLAND STAGE <----STORAGE----> STAGE <----STORAGE----> STAGE <----STORAGE----> STAGE <----STORAGE----> (ft) ---cf--- --AC-Ft- (ft) ---cf--- --Ac-Ft- (ft) ---cf--- --AC-Ft- (ft) ---cf--- --Ac-Ft- 396.00 0.0000 0.0000 398.30 16780 0.3852 400.60 87300 2.0041 402.90 231050 5.3042 396.10 435.00 0.0100 398.40 18140 0.4164 400.70 93550 2.1476 403.00 237300 5.4477 396.20 870.00 0.0200 398.50 19500 0.4477 400.80 99800 2.2911 403.10 243550 5.5911 396.30 1305 0.0300 398.60 20860 0.4789 400.90 106050 2.4346 403.20 249800 5.7346 396.40 1740 0.0399 398.70 22220 0.5101 401.00 112300 2.5781 403.30 256050 5.8781 396.50 2175 0.0499 398.80 23580 0.5413 401.10 118550 2.7215 403.40 262300 6.0216 396.60 2610 0.0599 398.90 24940 0.5725 401.20 124800 2.8650 403.50 268550 6.1651 396.70 3045 0.0699 399.00 26300 0.6038 401.30 131050 3.0085 403.60 274800 6.3085 396.80 3480 0.0799 399.10 28650 0.6577 401.40 137300 3.1520 403.70 281050 6.4520 396.90 3915 0.0899 399.20 31000 0.7117 401.50 143550 3.2955 403.80 287300 6.5955 397.00 4350 0.0999 399.30 33350 0.7656 401.60 149800 3.4389 403.90 293550 6.7390 397.10 5185 0.1190 399.40 35700 0.8196 401.70 156050 3.5824 404.00 299800 6.8825 397.20 6020 0.1382 399.50 38050 0.8735 401.80 162300 3.7259 404.10 306050 7.0259 397.30 6855 0.1574 399.60 40400 0.9275 401.90 168550 3.8694 404.20 312300 7.1694 397.40 7690 0.1765 399.70 42750 0.9814 402.00 174800 4.0129 404.30 318550 7.3129 397.50 8525 0.1957 399.80 45100 1.0354 402.10 181050 4.1563 404.40 324800 7.4564 397.60 9360 0.2149 399.90 47450 1.0893 402.20 187300 4.2998 404.50 331050 7.5999 397.70 10195 0.2340 400.00 49800 1.1433 402.30 193550 4.4433 404.60 337300 7.7433 397.80 11030 0.2532 400.10 56050 1.2867 402.40 199800 4.5868 404.70 343550 7.8868 397.90 11865 0.2724 400.20 62300 1.4302 402.50 206050 4.7303 404.80 349800 8.0303 398.00 12700 0.2916 400.30 68550 1.5737 402.60 212300 4.8737 404.90 356050 8.1738 398.10 14060 0.3228 400.40 74800 1.7172 402.70 218550 5.0172 405.00 362300 8.3173 398.20 15420 0.3540 400.50 81050 1.8607 402.80 224800 5.1607 4/ 4/94 Dodds Engineers, Incorporated page 2 THE ORCHARDS -- 88008 DRAINAGE ANALYSIS --------------------------------------------------------------------- --------------------------------------------------------------------- DISCHARGE STRUCTURE LIST DISCHARGE LIST ID No . 10 Description: FROM DEPRESSION WEST COMBINATION DISCHARGE ID No. 110 Description: WEST POND Structure : 160 Structure: Structure: 161 Structure: Structure : 162 MULTIPLE ORIFICE ID No. 160 Description: WEST POND Outlet Elev: 395 . 24 Elev: 393 . 24 ft Orifice Diameter: 7 . 0000 in. RISER DISCHARGE ID No. 161 Description: WEST POND Riser Diameter (in) : 15 . 00 elev: 397 .50 ft Weir Coefficient . . . : 3 . 782 height : 399. 00 ft Orif Coefficient . . . : 9. 739 increm: 0 . 10 ft NOTCH WEIR ID No. 162 Description: west pond Weir Length: 0 . 8333 ft . Weir height (p) : 1 . 4000 ft . Elevation : 396. 75 ft . Weir Increm: 0 . 10 DISCHARGE LIST ID No. 20 Description: FROM DEPRESSION 20, EAST BROAD CRESTED WEIR ID No. 200 Description: POND 2 OVERFLOW cd: 3 . 0300 Weir length: 0 . 6000 ft . El : 398 . 70 ft . Weir Increm: 0 . 10 COMBINATION DISCHARGE ID No. 210 Description: Structure: 200 Structure: Structure: 220 Structure: Structure: BROAD CRESTED WEIR ID No. 220 Description: POND 2 OVERFLOW cd: 3 . 0300 Weir length: 7 . 6000 ft . El : 399. 70 ft . Weir Increm: 0 . 10 4/ 4/94 Dodds Engineers, Incorporated page 3 THE ORCHARDS -- 88008 DRAINAGE ANALYSIS --------------------------------------------------------------------- --------------------------------------------------------------------- DISCHARGE STRUCTURE LIST DISCHARGE LIST ID No . 30 Description: FROM DEPRESSION 30, EAST MULTIPLE ORIFICE ID No . 300 Description: SOUTH POND Outlet Elev: 390 . 80 Elev: 388 . 80 ft Orifice Diameter: 4 . 7500 in. NOTCH WEIR ID No. 301 Description: Weir Length: 1 . 0000 ft . Weir height (p) : 3 . 0000 ft . Elevation : 394 . 30 ft . Weir Increm: 0 . 10 RISER DISCHARGE ID No. 303 Description: Riser Diameter (in) : 18 . 00 elev: 395 . 10 ft Weir Coefficient . . . : 3 . 782 height : 406 . 00 ft Orif Coefficient . . . : 9. 739 increm: 0 . 10 ft NOTCH WEIR ID No . 305 Description: emergency overflow cb Weir Length: 4 . 7100 ft . Weir height (p) : 4 . 0000 ft . Elevation : 395 . 10 ft . Weir Increm: 0 . 10 DISCHARGE LIST ID No. 31 Description: FROM DEPRESSION 31, EAST COMBINATION DISCHARGE ID No. 310 Description: Structure: 300 Structure: 301 Structure : 303 Structure : Structure : 305 DISCHARGE LIST ID No. 40 Description: FROM DEPRESSION 40, EAST COMBINATION DISCHARGE ID No . 400 Description: Structure: 401 Structure : Structure: 402 Structure : Structure: 403 4/ 4/94 Dodds Engineers, Incorporated page 4 THE ORCHARDS -- 88008 DRAINAGE ANALYSIS --------------------------------------------------------------------- --------------------------------------------------------------------- DISCHARGE STRUCTURE LIST MULTIPLE ORIFICE ID No. 401 Description: Outlet Elev: 396. 00 Elev: 394 . 00 ft Orifice Diameter: 8 . 0000 in. NOTCH WEIR ID No . 402 Description: Weir Length: 3 . 1400 ft . Weir height (p) : 2 .5000 ft . Elevation : 398 . 60 ft . Weir Increm: 0 . 10 RISER DISCHARGE ID No. 403 Description: Riser Diameter (in) : 18 . 00 elev: 398 . 00 ft Weir Coefficient . . . : 3 . 782 height : 399 . 00 ft Orif Coefficient . . . : 9. 739 increm: 0 . 10 ft DISCHARGE LIST ID No. 50 Description: FROM DEPRESSION 50, EAST �� I ' -! roil a / rK ��. • ' ��� ►!'fir' ,- o . 1 r • � \e erA,, r��r ,) � IF US MTV LV let. , SIP 41 A• • fag woAdRi .- MAW t ,I ��,�, P ��� �►n�.'�\ 1•,::1, � � � ��. IM- WWI �► ,�� . wmi�:R Etta)Ili WMAI 0 11:1314 DFM , . � . imam NO Kids lid[ mown woop PEI IWO MIN 6� KING COUNTY, WASHINGTON, SURFACE WATER DESIGN MANUAL FIGURE 3.5.2A HYDROLOGIC SOIL GROUP OF THE SOILS INKING COUNTY HYDROLOGIC HYDROLOGIC SOIL GROUP GROUP* SOIL GROUP GROUP' Alderwood C Orr-as Peat D Arents, Alderwood Material C Oridia D Arents, Everett Material B Ovall C Beausite C Pilchuck C Bellingham D Puget D Briscot D Puyallup B Buckley D Ragnar B Coastal Beaches Variable Renton D Earlmont Silt Loam D Riverwash Variable Edgewick C Salai C Everett A Sammamish D Indianola A Seattle D Kitsap C Shacar D Klaus C Si Silt C Mixed Alluvial Land Variable Snohomish D Neilton A Sultan C Newberg B Tukwila D Nooksack C Urban Variable Normal Sandy Loam D Woodinville D HYDROLOGIC SOIL GROUP CLASSIFICATIONS A. (Low runoff potential). Soils having high Infiltration rates, even when thoroughly wetted, and consisting chiefly of deep, well-to-excessively drained sands or gravels. These soils have a high rate of water transmission. B. (Moderately low runoff potential). Soils having moderate infiltration rates when thoroughly wetted, and consisting chiefly of moderately fine to moderately coarse textures. These soils have a moderate rate of water transmission. C. (Moderately high runoff potential). Soils having slow infiltration rates when thoroughly wetted, and consisting chiefly of soils with a layer that impedes downward movement of water, or soils with moderately fine to fine textures. These soils have a slow rate of water transmission. D. (High runoff potential). Soils having very slow infiltration rates when thoroughly wetted and consisting chiefly of clay soils with a high swelling potential, soils with a permanent high water table, soils with a hardpan or clay layer at or near the surface,and shallow soils over nearly impervious material. These soils have a very slow rate of water transmission. • From SCS, TR-55, Second Edition, June 19M, Exhibit A-1. Revisions made from SCS, Sol Interpretation Record, Form #5, September 1988. 3.5.2-2 I/90 KING COUNTY, WASHINGTON, SURFACE WATER DESIGN MANUAL TABLE 3.5.2B SCS WESTERN WASHINGTON RUNOFF CURVE NUMBERS SCS WESTERN WASHINGTON RUNOFF CURVE NUMBERS (Published by SCS in 1982) Runoff curve numbers for selected agricultural, suburban and urban land use for Type 1A rainfall distribution, 24-hour storm duration. CURVE NUMBERS BY HYDROLOGIC SOIL GROUP LAND USE DESCRIPTION A B C D Cultivated land(i): winter condition 86 91 94 95 Mountain open areas: low growing brush and grasslands 74 82 89 92 Meadow or pasture: 65 78 85 89 Wood or forest land: undisturbed 42 64 76 81 Wood or forest land: young second growth or brush 55 72 81 86 Orchard: with cover crop 81 88 92 94 Open spaces, lawns, parks, golf courses, cemeteries, landscaping. good condition: grass cover on 75% or more of the area 68 80 86 90 fair condition: grass cover on 50% to 75% of the area 77 85 90 92 Gravel roads and parking lots 76 a5 89 91 Dirt roads and parking lots 72 82 87 89 Impervious surfaces, pavement, roofs, etc. 98 98 98 98 Open water bodies: lakes, wetlands, ponds, etc. 100 100 100 100 Single Family Residential (2) Dwelling Unit/Gross Acre % Impervious (3) 1.0 DU/GA 15 Separate curve number 1.5 DU/GA 20 shall be selected 2.0 DU/GA 25 for pervious and 2.5 DU/GA 30 impervious portion 3.0 DU/GA 34 of the site or basin 3.5 DU/GA 38 4.0 DU/GA 42 4.5 DU/GA 46 5.0 DU/GA 48 5.5 DU/GA 50 6.0 DU/GA 52 6.5 DU/GA 54 7.0 DU/GA 56 Planned unit developments, % impervious condominiums, apartments, must be computed commercial business and industrial areas. (1) For a more detailed description of agricultural land use curve numbers refer to National Engineering Handbook, Section 4, Hydrology, Chapter 9, August 1972. (2) Assumes roof and driveway runoff is directed into street/storm system. (3) The remaining pervious areas (lawn) are considered to be in good condition for these curve numbers. 3.5.2-3 1/90