Loading...
HomeMy WebLinkAboutSWP272727(1) RECEIVED DEV CITY OF R@N ONNING fA 'k7 Alai D 1f# �lal ». Ii►`4 ; s<_ . :..........;:.; ;: ;.; ;:.;:.;:.;;;:.; .:; ...........:::. �y..(......y�rr+�+ {l y�rr X. OUR JOB NO. 6116 SAp9 0� OCTOBER 1997 10/3 o/`t 24M �ONA1.E EXPIRES - 98 Prepared By: BARGHAUSEN CONSULTING ENGINEERS, INC. 1 821 5 72ND AVENUE SOUTH KENT, WASHINGTON 98032 (425) 251 -6222 � 2 G� ,'Qe CIVIL ENGINEERING, LAND PLANNING, SURVEYING, ENVIRONMENTAL SERVICES \x IbUO C,?✓a .ti W S 89TN ST` s- S.. I P w @J s nj 1. .h�... _ � 90TIM ST LSE k"rrs.Y a♦ 6 :. ; .3.. ;��.,�,? � R < I�E1C,.s o - n Cti11� IP .+� ...'• � `y ,b,`t1'�l .� .,Ls�,�e 7[ a R � 9- s? 1 �, � �TIL '��' � Y V .I �}'�+t�'KEf'Zk^ �• ' z ` , iH'�. � ;\1 �5,,. `'7 g5TH 4 12,�f4 J�... AA, _ ��.�-- y,, - �,Fx • 11. - t SE SIERRA we $< its �- x »�ST HEIGHTS F G a w r• r TOOTH ST:PARK L] x 251N n TH CT =SE 1 Mom" IN a G 1 IOOIx SC y'<IOOTN PL 1PL .• 1 ST fit'• E Nw<n PL y ♦¢ N 1 e f'■ E'*1 NE i s ' N Y lO3RD ST rl < r f, Ya. 22ND 2 SE 1041N `, 'ST m ST Z■ Fi i'E V N[ _ I ■ .:i, u C dD \. SE 1105 y o OK '.. t i♦F�'6 IRON �CRE�f S > E�9fN'ST. ippS T �� SE 105ix 5t IE J S i n' ,� SPACEI_ SE IOATH STY ME ,sa t 1 u, IJ'I• `, .+ -}y 1'000 W �''"" „a t ss w 5 1 T c So107TH HE n n`� > a1W ♦ 'Ci. ,r Ir ' qel ♦ .I,s o, � F 91Y.VAu 16400 �I 2$ a ID l+Tx tt Lx�K\ _ Q, CDUNiY P y 1,N n _ (/,�S;T* : j 171M Si 44 8 g - `- .. T/7 oA' ♦ s is(111TN PL ♦'\ CO/ , a� �e� NEW 12TH ST SE _ -. IS 11 Si u::�.a SE 1127N ST S`�{ �♦ SE NKEP = 700 1 4300 E 1s y DE R M u 1 s,. �/ry//(/ •i\ PO 11TN NF 117N ix n :::<l 11ST 11 �4► i mx i 3 n K , L t� r �I - r^ •1 EE S 114TH�ST _ �N s[czoET�Q < 1 j < c SE 1 6TH n ST < '<< i =10TN LN R 14100 - •1 ■-O1N': T NE ST `..■ 1 x 116ix St 1SeO017T vWi g ^ Ib H 37 Tx . g 97H - s�� - t2 9 any 10 RE T } _t •. ,. Y HE y .7TN R < SE 120TH ! ST SE 120TH 121ST ST NE 122x0� _ ! e E CDALFIELL ■4 t V ST - i ry x PARK N s" 1k .• {��'1 SE 124TH ST �`i•SE 124TH I ST CDALFIf117_ I 77- i:+<-w• r T[ aqE ■ •ne1A 1 -..{ SE 1:sTH ST � � PARKA c NE ■< T Eu 4TH = SE 128TH ST "'I SE 1 128TH $lE 1, RIDE ' 4 ,<' �'-tYr'. 4000 T 1 1e60p L 15M ^< HE 3RD CT .. PL ; i F •N ST> `K SE 131ST ST< as u HE 1 ar 211p ST SE 132NO ST •,�� :� L z L SE -- `-- ; '<SE I32N0 SE 132N0 ST SE 1 NE 3ep,. ■ fit SE 133RO PL of, ♦ E7H lnt 'y,Y �il 7 J3 sT i ' `•S_ r < ,� i 5A, 1 �, SE 134TH -r LEISURE ip F i 1 < < ST To1Rrr ESTATES i u,� I 135T Pi 14 x anEx 16 IMP N 1 - 136TH J ST SE_-- 36T}i ST CJPRT�aI' SE HO p SE .19 SE 138TH , �I SE 138TH PL L R S ' HIP 4000 '.=�' i rl < KI zF �(E� _ SE 4 ►•(a 1 x 13 i n , J 4,E;?•.I SE 139TH i II 'o sQ2 T.40 `C PL '^ S 139TH PL $a SE STH -- x MN _ f "$ - O nbe�rs r.Av z� IAIST "1^ SE 1STST $ < -' SE 142N0 _ - -4t. 142ND ST r v s rF. ti ' k cS€€ I. d StILA SF\' S x IgRD h .PL tr 144 'P ST rL - ax t.N., a_ !� �` �' g' ST` =I x turx SE 16000E H I.r 144TN 168 f e ,� � _�k 60(F tq c< �`, •.•m«R_'�^�..t:` .,twnn s<s x L �� � E � x < >�i� ■ etM �:%• �t�{1'1JJ1,, _ � - 1*": �+•Y. �WW n.', �"' x � �, Y ��E E;€ F ST . - "M.= `� 4�5'��• 3 � .' ��.(I �� 1�x 1<6TM PL � b 'Fs a1T1. � � s•h t b�J43'y. > .t ,� �'�"'N o � Gar S � 4 ' s[. x _ ,3 Ss s:., s7 r ""`':y'�1� .t. !'YER. � 1 •�sn li a�E 21 g � ` 1. NTpN �T 4 4' pux �E y o yEs23e" ' h `'.a yl 1C .♦\���,' 1/, ' PL '"'T*-. JF.ti� '�'ST 1s 0 6 A R i6cr g d J ¢ v S Pf \\ VICINiTy MAP Nv�7'f! BARGHAUSEN DATE: �� PAGE OF CONSULTING ENGINEER: ENGINEERS, INC. PROJECT#: PROJECT/SUBJECT: FC. i. ..... _ 1 . .. ..// O. t/S.. .. .. .._.......... a .........' ............... e a .... .... G2o.11 h ......'..i3_R........ w �.4! -?.. �,rJ. "._ �✓9u S Gar /? ; 3 \ n '9 ... G / .............. .. ........... ...3............... ........ ' n :..C7' __. .. 41, t s $$$ k FS F s € 7/7/97 4 : 30: 35 pm Barghausen Engineers page 1 QFC PRELIMINARY DETENTION POND SIZING CALC'S BCE # 6116 BASIN SUMMARY BASIN ID: D10 NAME: 10YR/24HR POSTDEVELOPED SBUH METHODOLOGY TOTAL AREA. . . . . . . : 7 . 57 Acres BASEFLOWS: 0. 00 cfs RAINFALL TYPE. . . . : KC24HR PERV IMP PRECIPITATION. . . . : 2 . 90 inches AREA. . : 1. 14 Acres 6 . 43 Acres TIME INTERVAL. . . . : 10. 00 min CN. . . . : 80 . 00 98 . 00 TC. . . . . 6 . 30 min 6 . 30 min ABSTRACTION COEFF: 0. 20 PEAK RATE: 4 . 87 cfs VOL: 1. 54 Ac-ft TIME: 470 min BASIN ID: D100 NAME: 100YR/24HR POSTDEVELOPED SBUH METHODOLOGY TOTAL AREA. . . . . . . : 7 . 57 Acres BASEFLOWS: 0. 00 cfs RAINFALL TYPE. . . . : KC24HR PERV IMP PRECIPITATION. . . . : 3 . 90 inches AREA. . : 1 . 14 Acres 6 . 43 Acres TIME INTERVAL. . . . : 10 . 00 min CN. . . . : 80 . 00 98 . 00 TC. . . . . 6 . 30 min 6 . 30 min ABSTRACTION COEFF: 0. 20 PEAK RATE: 6. 77 cfs VOL: 2 . 15 Ac-ft TIME: 470 min BASIN ID: D2 NAME: 2YR/24HR POSTDEVELOPED SBUH METHODOLOGY TOTAL AREA. . . . . . . : 7 . 57 Acres BASEFLOWS: 0. 00 cfs RAINFALL TYPE. . . . : KC24HR PERV IMP PRECIPITATION. . . . : 2 . 00 inches AREA. . : 1. 14 Acres 6. 43 Acres TIME INTERVAL. . . . : 10 . 00 min CN. . . . : 80. 00 98 . 00 TC. . . . . 6. 30 min 6 . 30 min ABSTRACTION COEFF: 0. 20 PEAK RATE: 3 . 18 cfs VOL: 1.00 Ac-ft TIME: 470 min BASIN ID: EX10 NAME: 10YR/24HR PREDEVELOPED SBUH _METHODOLOGY TOTAL AREA. . . . . . . : 7 . 57 Acres BASEFLOWS: 0. 00 cfs RAINFALL TYPE. . . . : KC24HR PERV IMP PRECIPITATION. . . . : 2 . 90 inches AREA. . : 7 . 00 Acres 0 . 57 Acres TIME INTERVAL. . . . : 10. 00 min CN. . . . : 72 . 00 98 . 00 TC. . . . : 109 . 32 min 109 . 32 min ABSTRACTION COEFF: 0. 20 TcReach - Sheet L: 300. 00 ns: 0. 4000 p2yr: 2 . 00 s: 0 . 0060 TcReach - Shallow L: 80 . 00 ks: 5 . 00 s: 0. 0060 PEAK RATE: 0. 44 cfs VOL: 0. 56 Ac-ft TIME: 640 min 7/7/97 4 : 30: 35 pm Barghausen Engineers page 2 QFC PRELIMINARY DETENTION POND SIZING CALC' S BCE # 6116 BASIN SUMMARY BASIN ID: EX100 NAME: 100YR/24HR PREDEVELOPED SBUH METHODOLOGY TOTAL AREA. . . . . . . : 7 . 57 Acres BASEFLOWS: 0 . 00 cfs RAINFALL TYPE. . . . : KC24HR PERV IMP PRECIPITATION. . . . : 3 .90 inches AREA. . : 7 . 00 Acres 0. 57 Acres TIME INTERVAL. . . . : 10. 00 min CN. . . . : 72 . 00 98 . 00 TC. . . . : 109 . 32 min 109 . 32 min ABSTRACTION COEFF: 0. 20 TcReach - Sheet L: 300 . 00 ns: 0. 4000 p2yr: 2 . 00 s: 0 . 0060 TcReach - Shallow L: 80. 00 ks: 5. 00 s: 0.0060 PEAK RATE: 0. 89 cfs VOL: 0. 99 Ac-ft TIME: 530 min BASIN ID: EX2 NAME: 2YR/24HR PREDEVELOPED SBUH METHODOLOGY TOTAL AREA. . . . . . . : 7 . 57 Acres BASEFLOWS: 0. 00 cfs RAINFALL TYPE. . . . : KC24HR PERV IMP PRECIPITATION. . . . : 2 . 00 inches AREA. . : 7 . 00 Acres 0 . 57 Acres TIME INTERVAL. . . . : 10 . 00 min CN. . . . : 72 . 00 98 . 00 TC. . . . : 109 . 32 min 109 . 32 min ABSTRACTION COEFF: 0. 20 TcReach - Sheet L: 300. 00 ns: 0.4000 p2yr: 2 . 00 s: 0. 0060 TcReach - Shallow L: 80. 00 ks: 5. 00 s: 0. 0060 PEAK RATE: 0. 18 cfs VOL: 0. 25 Ac-ft TIME: 770 min BASIN ID: WET1 NAME: WETPOND VOLUME CALCULATION .SBUH METHODOLOGY TOTAL AREA. . . . . . . : 7 . 57 Acres BASEFLOWS: 0. 00 cfs RAINFALL TYPE. . . . : KC24HR PERV IMP PRECIPITATION. . . . : 0. 67 inches AREA. . : 1. 14 Acres 6. 43 Acres TIME INTERVAL. . . . : 10. 00 min CN. . . . : 80. 00 98 . 00 TC. . . . . 6. 30 min 6. 30 min ABSTRACTION COEFF: 0 . 20 PEAK RATE: 0. 82 cfs VOL: 0 . 26 Ac-ft TIME: 480 min 7/7/97 4 : 30: 35 pm Barghausen Engineers page 3 QFC PRELIMINARY DETENTION , POND SIZING ..LC' S BCE # 6116 HYDROGRAPH SUMMARY PEAK TIME VOLUME HYD RUNOFF OF OF Contrib NUM RATE PEAK HYDRO Area cfs min. cf\AcFt Acres 1 0. 180 1460 25908 cf 7 . 57 Zyg /Zq/�,'z t2o�.'iic' 2 0. 437 1450 43719 cf 7 . 57 3 0. 164 1460 23703 cf 7 . 57 4 0. 365 1460 35527 cf 7 . 57 /p 74(H.c Firv.9 L 5 0. 801 1020 58842 cf 7 . 57 /oo /l/, L 6 0. 180 780 11091 cf 7 . 57 wEr �onil� s �Z✓�G 7/7/97 4 : 30: 38 pm Barghausen Engineers page 4 QFC PRELIMINARY DETENTION POND SIZING CALC'S BCE # 6116 STORAGE STRUCTURE LIST TRAPEZOIDAL BASIN ID No. 1 Description: DETENTION POND Length: 166. 00 ft. Width: 100. 00 ft. Side Slope 1 : 2 Side Slope 3 : 2 Side Slope 2 : 2 Side Slope 4 : 2 Infiltration Rate: 0. 00 min/inch TRAPEZOIDAL BASIN ID No. 2 Description: DETENTION POND W/30% INCREASE ` Length: 195 . 00 ft. Width: 110. 00 ft. Side Slope 1: 2 Side Slope 3 : 2 Side Slope 2 : 2 Side Slope 4 : 2 Infiltration Rate: 0. 00 min/inch 7/7/97 4 : 30: 38 pm Bargh-usen Engineers page 5 QFC PRELIMINARY DETENTION POND SIZING CALC' S BCE # 6116 STAGE STORAGE TABLE TRAPEZOIDAL BASIN ID No. 1 Description: DETENTION POND Length: 166. 00 ft. Width: 100. 00 ft. Side Slope 1: 2 Side Slope 3 : 2 Side Slope 2 : 2 Side Slope 4 : 2 Infiltration Rate: 0. 00 min/inch STAGE <----STORAGE----> STAGE <----STORAGE----> STAGE <----STORAGE----> STAGE <----STORAGE----> (ft) ---cf--- --Ac-Ft- (ft) ---cf--- --Ac-Ft- (ft) ---cf--- --Ac-Ft- (ft) ---cf--- --Ac-Ft- 395.50 0.0000 0.0000 396.40 15375 0.3530 397.30 31635 0.7262 398.20 48803 1.1204 395.60 1665 0.0382 396.50 17137 0.3934 397.40 33497 0.7690 398.30 50768 1.1655 395.70 3341 0.0767 396.60 18911 0.4341 397.50 35371 0.8120 398.40 52744 1.2108 395.80 5028 0.1154 396.70 20695 0.4751 397.60 37256 0.8553 398.50 54732 1.2565 395.90 6725 0.1544 396.80 22491 0.5163 397.70 39152 0.8988 398.60 56731 1.3024 396.00 8434 0.1936 396.90 24297 0.5578 397.80 41059 0.9426 398.70 58742 1.3485 396.10 10153 0.2331 397.00 26115 0.5995 397.90 42978 0.9866 398.80 60765 1.3950 396.20 11883 0.2728 397.10 27944 0.6415 398.00 44908 1.0310 398.90 62800 1.4417 396.30 13623 0.3127 397.20 29784 0.6837 398.10 46850 1.0755 399.00 64846 1.4887 7/7/97 4 : 30: 38 pm Barghausen Engineers page 6 QFC PRELIMINARY DETENTION POND SIZING CALC' S BCE # 6116 STAGE STORAGE TABLE TRAPEZOIDAL BASIN ID No. 2 Description: DETENTION POND W/30o INCREASE Length: 195. 00 ft. Width: 110. 00 ft. Side Slope 1: 2 Side Slope 3 : 2 Side Slope 2 : 2 Side Slope 4 : 2 Infiltration Rate: 0. 00 min/inch STAGE <----STORAGE----> STAGE <----STORAGE----> STAGE <----STORAGE----> STAGE <----STORAGE---->` (ft) ---cf--- --Ac-Ft- (ft) ---cf--- --Ac-Ft- (ft) ---cf--- --Ac-Ft- (ft) ---cf--- --Ac-Ft- 395.50 0.0000 0.0000 396.20 15316 0.3516 396.90 31240 0.7172 397.60 47784 1.0970 395.60 2151 0.0494 396.30 17553 0.4030 397.00 33566 0.7706 397.70 50199 1.1524 395.70 4314 0.0990 396.40 19803 0.4546 397.10 35903 0.8242 397.80 52627 1.2081 395.80 6490 0.1490 396.50 22065 0.5066 397.20 38254 0.8782 397.90 55067 1.2642 395.90 8678 0.1992 396.60 24340 0.5588 397.30 40618 0.9324 398.00 57521 1.3205 396.00 10878 0.2497 396.70 26628 0.6113 397.40 42994 0.9870 396.10 13091 0.3005 396.80 28928 0.6641 397.50 45383 1.0418 7/7/97 4 : 30: 38 pm Barghaur,.r. Engineers page 7 QFC PRELIMINARY DETENTION POND SIZING CALC' S BCE # 6116 DISCHARGE STRUCTURE LIST MULTIPLE ORIFICE ID No. 1 Description: CONTROL STRUCTURE Outlet Elev: 395. 40 Elev: 393 . 40 ft Orifice Diameter: 2 . 1826 in. Elev: 397 . 40 ft Orifice 2 Diameter: 3 . 3398 in. RISER DISCHARGE ID No. 2 Description: RISER INFLOW Riser Diameter (in) : 18 . 00 elev: 398 . 00 ft Weir Coefficient. . . : 9 . 739 height: 399 . 00 ft Orif Coefficient. . . : 3 . 782 increm: 0. 10 ft COMBINATION DISCHARGE ID No. 3 Description: COMINATION ST 1 AND 2 Structure: 1 Structure: Structure: 2 Structure: Structure: 7/7/97 4 : 30: 38 pm Baigliausen Engineers page 8 QFC PRELIMINARY DETENTION POND SIZING CALC' S BCE # 6116 STAGE DISCHARGE TABLE MULTIPLE ORIFICE ID No. 1 Description: CONTROL STRUCTURE Outlet Elev: 395. 40 Elev: 393 .40 ft Orifice Diameter: 2 . 1826 in. Elev: 397 .40 ft Orifice 2 Diameter: 3 . 3398 in. STAGE <--DISCHARGE---> STAGE <--DISCHARGE---> STAGE <--DISCHARGE---> STAGE <--DISCHARGE---> (ft) ---CfS-- ------- (ft) ---CfS-- ------- (ft) ---CfS-- ------- (ft) ---CfS-- ------- 395.40 0.0000 396.40 0.1293 397.40 0.1828 398.40 0.5266 395.50 0.0409 396.50 0.1356 397.50 0.2831 398.50 0.5451 395.60 0.0578 396.60 0.1416 397.60 0.3271 398.60 0.5628 395.70 0.0708 396.70 0.1474 397.70 0.3619 398.70 0.5800 395.80 0.0818 396.80 0.1530 397.80 0.3917 398.80 0.5965 395.90 0.0914 396.90 0.1583 397.90 0.4184 398.90 0.6126 396.00 0.1001 397.00 0.1635 398.00 0.4429 399.00 0.6282 396.10 0.1082 397.10 0.1686 398.10 0.4657 396.20 0.1156 397.20 0.1734 398.20 0.4871 396.30 0.1226 397.30 0.1782 398.30 0.5073 7/7/97 4 : 30: 38 pm Barahausen Engineers page 9 QFC PRELIMINARY DETENTION POND SIZING CATC'S BCE # 6116 STAGE DISCHARGE TABLE RISER DISCHARGE ID No. 2 Description: RISER INFLOW Riser Diameter (in) : 18 . 00 elev: 398 . 00 ft Weir Coefficient. . . : 9 . 739 height: 399 . 00 ft Orif Coefficient. . . : 3 . 782 increm: 0 . 10 ft STAGE —DISCHARGE---> STAGE <--DISCHARGE---> STAGE <--DISCHARGE---> STAGE —DISCHARGE---> (ft) ---cfS-- ------- (ft) ---CfS-- ------- (ft) ---cfs-- ------- (ft) ---CfS-- ------- 398.00 0.0000 398.20 1.3066 398.50 5.1649 398.80 7.6111 398.00 0.0000 398.30 2.4004 398.60 6.5914 398.90 8.0728 398.10 0.4620 398.40 3.6957 398.70 7.1196 399.00 8.5095 a 7/7/97 4 : 30: 38 pm Barghausen En( , - ?rs page 10 QFC PRELIMINARY DETENTION POND SIZING CALC' S BCE # 6116 STAGE DISCHARGE TABLE COMBINATION DISCHARGE ID No. 3 Description: COMINATION ST 1 AND 2 Structure: 1 Structure: Structure: 2 Structure: Structure: STAGE <--DISCHARGE---> STAGE <--DISCHARGE---> STAGE <--DISCHARGE---> STAGE <--DISCHARGE---> (ft) ---CfS-- ------- (ft) ---CfS-- ------- (ft) ---CfS-- ------- (ft) ---CfS-- ----- 395.40 0.0000 396.40 0.1293 397.40 0.1828 398.40 4.2223 . 395.50 0.0409 396.50 0.1356 397.50 0.2831 398.50 5.7105 395.60 0.0578 396.60 0.1416 397.60 0.3271 398.60 7.1543 395.70 0.0708 396.70 0.1474 397.70 0.3619 398.70 7.6995 395.80 0.0818 396.80 0.1530 397.80 0.3917 398.80 8.2077 395.90 0.0914 396.90 0.1583 397.90 0.4184 398.90 8.6854 396.00 0.1001 397.00 0.1635 398.00 0.4429 399.00 9.1377 396.10 0.1082 397.10 0.1686 398.10 0.9276 396.20 0.1156 397.20 0.1734 398.20 1.7937 396.30 0.1226 397.30 0.1782 398.30 2.9077 7/7/97 4 : 30: 44 pm Barghau,en Engineers page 11 QFC PRELIMINARY DETENTION POND SIZING CALC' S BCE # 6116 LEVEL POOL TABLE SUMMARY MATCH INFLOW -STO- -DIS- -PEAK- STORAGE <--------DESCRIPTION---------> (cfs) (cfs) --id- --id- <-STAGE> id VOL (cf) ----------------------------------------------------------------------------- ----------------------------------------------------------------------------- 2YR/24HR ROUTING ............. 0.18 3.18 1 1 397.35 1 32546.38 cf 10YR/24HR ROUTING ............ 0.44 4.87 1 1 397.98 2 44447.46 cf 2YR/24HR FINAL ............... 0.18 3.18 2 3 397.00 3 33585.45 cf 10YR/24HR FINAL .............. 0.44 4.87 2 3 397.71 4 50429.85 cf 100YR/24HR FINAL ............. 0.89 6.77 2 3 398.07 5 59344.26 cf tJ. S OLf'ARIMLN1 0! Al;ftl(;I1f1tIRl Y lki.l+, SOIL CONSERVATION1•,ING (VUH I$f hVICf • SOIL LEGEND The Grst copi,al lenen is the iniliol one of the soil no me. A second<oo..et A. 6.C.0.E,a F, indicates the class of slope. Symbols wid.ou+o sl,._e I<++er o•< +hose of neon ly level Boas. SYMBOL NAME A96 Alderwood gravelly sandy loam,0 to 6 percent slopes O A9C Aldervrood grovelly sandy loam,6 to 15 percent slopes - Ago Alderwood gravelly sandy loom, 15 to 30 percent slopes A1tF Alderwoad and Kitsap soils,very steep A-6 Arent.,Alde—ood material,0 to 6 percent slopes• t,.a A-C Arenls,Aldenwood material,6 to IS percent slopes An Arens, Everest muter iol• +',.. Bec •Beousite gravelly sandy loom,6 to 15 percent slopes Be0 8eousite gravelly sandy loam, 15 to 30 percent slopes PeF B--t..•ite �el!�scx'�1 -.,"0:0 7 gro 5 _lo .l i•c-._... 8h Bellingham silt loom i 81 Briscot silt loam 13an Buckley silt loam I Cb Coostal Beoches - �• E. Eorlmont silt loom , Ed E evr:ck fine sand loom ^ Eve Everett gravelly sondy loom,0 to 5 percent slopes E verett grove y sa y oom, e s Ev0 Everett gravelly sandy loom, 15 to 30 percent slopes E-C Everett-Aldenvrood gravelly sandy loons,6 to 15 percent slopes InA Indianola loony fine sand,0 to 4 percent slopes Inc Indianola loony fine sord,4 to 15 percent slopes Ino Indianolo loamy fine sod. 15 to 30 percent slopes K96 Kitsap silt loom,2 to 8 percent slopes ti...Id.. KpC Kitsap silt loom,8 to 15 percent slopes ' Kp0 Kitsap silt loom, 15 to 30 percent slopes KsC Klaus gravelly loamy sand,6 to 15 percem slopes . 1;...Id. M. Mixed ellwial$and N<C Neihon very gravelly foamy sand,2 to 15 percent slopes Ng Ne.vberg silt loom .. NI, Nooksock silt loom It No N--sandy loom 0+ Orcas peat Os Oridio silt loom 0vC 0w11 gravelly loom,Oto 15 percent slopes 010 0-Ill gravelly loom, 15 to 25 percent slopes O..F Ovall gravelly loom,40 to 75 percent slopes Pc Pilehuck loony fine sand Pk Pilchuck fine sorely loom �- Pu Pangel silty cloy loam Py Puyollup fine sandy loom ROC Rognor fine sandy loom,6 10 15 percent slopes Roo Ro9ror fine sandy loom, 15 to 25 percent slope, RdC Radnor-Ind:onolo association,sloping RdE Ro9nor-Ind:onolo ossoeiot:on,moderate ly sleep R< Mentor.sit, loom Rh River..osl. t SO SOlol it, loom jh $pm mam:5h s.l+ loom Sk 5eonle m.,ck Sm St'lco•muck Sn S.sa+ loom . $n� Snat,Omiih Sil+ loom y Snohomish s.Wfoom, thick wrfo<e va6— .. • U U.tion Io .A, team .+.. <n..pa....✓•et -1e, ... .oh L. .ha...t.ar:1 ... ... .. .... . . .. �. r. ..v.r..:l 1......11......•�h ........ . � 1... 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 Orcas Peat _ O Arents, Alderwood Material C Oridia D Arents, Everett Material B Ovall C Beausite C Pachuck C Bellingham D Puget D Briscot D Puyallup B Buckley D Ragnar B Coastal Beaches Variable Renton D Eadmont Silt Loam D Riverwash Variable Edgewick C Salal C Everett A Sammamish _ D Indianola A Seattle D Kltsap C Shacar D Klaus :; Si Silt C Moved Alluvial Land Variable Snohomish D Neilson 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 day 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 1986, Exhibit A-1. Revisions made from SC—'-. Soil Interpretation Record. Form #5• September 1988. t� x / �.. • ". / gyp•,-���.:� _ - � �� ���� �� :.,..� � J� .;�":�f���� '�'.0 4 ` �✓fir. *� �� /1 � .1�Q►i'-%�' �t�s+r r�r�k w.. *- \� � ��; I /� gyp"p »*fl ' ta✓- �` �` y: rR� a' _ c—�'I I i `Y•" --•:ff�•x:�• �,�P:r "'`+ � `#�aPF+J��` t• •�... o e WR, \���� Irj 11 '�,. 4i� �`•4. r •c•' � � •�a T t., e k tii�fi gyy `��t[�[� � ' I # \ _ _ a a d I R: _ a s�\,�` I...._� ..�r - ' I� W' ,`•'ti :,•k`}'.•.�t`',� 7/ 1 . • n 3PAN EL MOO m �illvw Doi OM lam 1 killOw a . -go, J 1 KING COUNTY, WASHINGTON, SURFACE WATER DESIGN MANUAL FIGURE 3.5.1E 10-YEAR 24-HOUR ISOPLUVIALS 2.1 -- --- - - -==� - , - - - - - - - 22 J- - 2.3 - 24 `'� � 4 2s 2.6 2 _ _ 3.0 - � 3. Q) - - 1 ; , YEAR 24-HOUR PRECIPITATION 3.4�- ISOPLUVIALS OF 10-YEAR 24-HOUR Q'- TOTAL PRECIPITATION IN INCHES 3O - 0 1 2 3 4 5 6 7 8 M11 as ✓ � '•"c • ►► • • ME X , I 1IVA RINA INS wl ",� � � �`Z , �'�►�'� ,�►-may.. t lill IN LA l�I� � r WAWA KFAM � up KING COUNT )', WASHINGTON, SURFACE WATER DESIGN MANUAL BLE 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(1): winter condition 86 91 94 95 Mountain open areas: low growing brush and grasslands 74 82 \1 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 8& 90 fair condition: grass cover on 50% to 75%of the area 77 85 90 92 Gravel roads and parking lots 76 85 89 91 Dirt roads and parking lots .72 82 87 89 Impervious surfaces, pavement, roofs, etc. 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 1. 2.5 DU/GA 30 impervious portion 3.0 DU/GA 34 of the site or basin 3.5' DUJGA 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 S6 / 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 BARGHAUSEN DATE: PAGE-OF- CONSULTING ENGINEER: ENGINEERS, INC. PROJECT#: PROJECT/SUBJECT: ....................... ...... ............... .... ................... ........... .......... ........... .......... .......... . ....... ........... .... .............................. ................ .................................................... .................... ............................. ................................ ............ ....................... ........... .......... ... ............................... ................ ........ ................... ............................................. ........... .................................... ...............................1. ..........................L. .... .............................. 47o fj ......................... ........ ........ ....... . . ................ ..................................... .................... ...................... ... ................................. ........ .................. . .. .......... ..................... ei, V" V, ..........................................I....................... ........................... ........................... .......... .... .......... ... ....... ........ --------- ................................................ .............................. ..................................... .......... ... .......... . ...................... ............. ............................. ............................... ................... .......... ................................... .......... ............ ..........:............ ......... ...... ........... ............ ...................................... . ......... ...................... ...... ...... .............................. .................. ..................................................... ................................... ........... ...................w.....I .... ..........­=............-7.....74� ...... ........ z. ............................................................I.:.......... ........................ .......... .......... ........................ ..............._._ .moo:........ 74.1 c 4.6 4 _0 z ................................................... .......... .................................. .................... ........... ................................. .......... ........... ... .......... ........... ........... ............................. ......................... ... ... ........ .................................... ........... ..................-.........................................- C e.1-4 :566o C . AwF . ....................... ................. ......... .......................................... ............. ...................... ............ ................................... ............................ ....................m........... ............. ................................................... ............................ ....... ...... .......... ..................... ........... ......................................... ....................... .......... ..... ................ ...................... ........... .......... .......... ..... ........................ ........... .......... ........... .......... ...................... .......... ...................... .............................................. .... ................... .............. ............................................... .......................... .................. ........... ....................... ...... ........... ..........I ............... ........... ...............I....................... ............ ...............-....................................................... ...............- ............. ........................... ..................... ................. ........................ .......................... .... ...................................................... ...... .............. ..................... .......... ................ ........... ...........- ... . ........... ... ........ ...... ....... .......... ........ ............... ............ . ........................ ..................... ....................... ................... .. . ....... ........... i .................................................... ............... ...................................................... ........... . ......... ... ........... . .... . ......... .......... .................. ....................... .............. .........I . ......... ........... ................ .......................................... ........................ ...... .............. ........... .............................................. .............. .......... ................. ........... .....b................ — ----------