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Home My WebLink AboutSWP271823 (2)COMPUTATION SHEET ESM ina A CIVIL ENGINEERING, LAND SURVEY, AND PROJECT MANAGEMENT CONSULTING FIRM 941 Powell Ave. SW, Suite 100 Renton Washington, 98055 (206) 228-5628 JOB NO. %1^ DATE v 1 I • SHEET OF JOBNAME ✓y^t'1 , .1 G-WII..j,L'-�� COMP. BY -�✓ CHK. BY CONTENTS -cam M Cr-LC-'JLA7-lnv. �� i G 4 ri -{ - S Ur✓vl C Tr' f fGty! ' - -vim r tM c� e� �; on caCw is ass r kw? ► c� po'lfr ro �� G(. 'l�,lc.-� � .J t.��J�'t.. �,Y?'�'- �, !�, V!�,,L; � Ott_. �_�.,�/ti��ic.o'�✓1 Y� vI rIIr v, `% h-e' 25 ► �71L' e�fzvet' e— •,c c, t�- ai ?�jgav YPJQ f a.1.2 r "- _ _ �+ G(- - rlY !' 1I, � r,1 7'�' SfDYvrf v!to 6,14 GU/h �' � hC; � d-t/Ytr't. ; ��¢G r � .svf�vt',/ r �, -tC� /�� r1Y7 b ✓ {� T�-�- v10 dip r'� �� /�� r.► •�,�- Srr/ry ive KVl - 2;7- /82 3 Awl AV C It COMPUTATION SHEET Z ',�I �1 l.�(� �'�'� JOB NO. DATE SHEET v OF ESM inc. JOB NAME T-�'% A CIVIL ENGINEERING, LAND SURVEY, AND PROJECT MANAGEMENT COMP. BY CHK. BY CONSULTING FIRM 941 Powell Ave. SW, Suite too Renton Washington, 9e055 `ii L- C�N`�� , �.�( S (20 l zze-seze Jzot; CONTENTS rY LA-1— -C.0 CtJ Storm Sewer DesComnu -17 ns JOB NO. 46,->1 ESM inc. DATE FROM ro BY Cyr SHEET 3 OF ail $ou,h..ral IQh A.rSUP"$,I.Ir loe Renton WnMrq„on, moss { /-D-F CURVE S6A'f7Z��E/S/T/ RETURN YEAR (2 a1:ie-seze � Location of pipe Tributor Point of concentration Time of Concentration RainfaO intens- ity r O= CIA Inv. el. of pt, of con Inv. eI. at nextpt. Length of pipe Grade o Vez CF U u") Diameter from = ecific areas noted Accum. rotols Theo. Comr�: i Area No. acres Q „ Runof factor "CA" Acres X k„ /00% AC. 2. " total at prey p in Pipe from last pt. total of pt. of cone From T o nx Ke = D d r2• D �,r � 7 i � : v �j��J .�,�, �_ p,�1 0-� d-�� . C b-�? �•g Z.G'C O']0 (� S� 1 �'� 1 d- b.�' �'. i l 1%' �� 3(G7 I I - �` J Ut-,�- ✓ �' o�� p, Z"' D ' � b . tc I � -� d . G; � • l� I . ' 1 • i g 1 ', ?'`� ' � =' � � �o �• 11 ! 2+'' 4� �, i &P �- o o 2 0_03 �,� d LIP -C) F 1 - 1— Z .�4-IIZ?a ° ' ,47 II Z o.Qo 11 IZ� i ��¢ ► i lx� 1°1 b, 0.4,c� `O. D -T 'L -N'"" CO�� j,�j j,(o I�•Gj b.z 10.1 ,GJGj 2 �3 ¢, �I.O 7•�i �� 54= Ip\0 7 AJ �.to I �`t ^•`� 7 da _ ✓OB NO. Sform Sepler Design C002pufofions �2(v�l -� I � DATE / S FROM TO BY Z;. G�f� /-D -F CURVE Ski, � RE TURN YEAR /D yl SHEET 4- OF ESM inc. 9 451 SmAhwra 10rh Sire" Sure 106 Renim Wa%hingpn. 98055 (206) 22E• win Ame of concentration M OEM I PA COMPUTATION SHEET JOB NO. _ ESM ina I JOB NAME A CIVIL ENGINEERING, LAND SURVEY, AND PROJECT MANAGEMENT COMP. BY CONSULTING FIRM 941 Powell Ave. SW, Suite 100 Renton Washington, 98055 (mc) 228-5628 CONTENTS DAT! CHK. BY SHEET OF -- - --- �'1'oM . _.�I-4�� _ •.S• _ � .� f L Sc�rU�r:1.._lNc��C.�_ _J - - -- -u v�d�-v,2�� ► _y-�� ►_�.s a s _ �_ ��oho�,sh� _ aid_ -ram (-r-v �w_ ; �� .-rc..�.a..�._ _...rc.�e,_ - _C ►�eV �- %;cNe� / IJ Vil � t _ ' ��-� CGS 1'v?,c$'{, A Utiv► -- - ----- ---- --gin-- �o _ 7 FuruM . cLsn NCB CIi� �?IDN� A-, - "b- 14 _ ba e J �. C's eV EA-e ► N NkA? - A- tom, c*rouNu uucais e s- I&I v - 0. 1(eo) GAS IN DATA BASIN FILE. UNUSED FILE RECORDS-. paoe BASIN NUMBER: I BASIN DESCRIPTOR: EXISTINC INITIAL TIME CONQ 20.00 min BASIN AREA-72.22 acres SCS CURVE NUMSER�; 69.00000 WATERCGURS!'_-: LENGTH T Y P E SLOPE VELOC 1 T'-.,-' TIME CONCENTRATIOW; 20.60 min TIME CONCENTRATIOW, DEVELOPED SITI]H_ 17. 20 win --- 2.19 acres 97.00000 LENG&H (ft) 13.20 min ovowl 50,17 " + HYDROGRAPH DATA HYDROGRAPH FILE. UNUSED FILE RECORDS: 3-10) SLOPE VELOCITY (%) (ft/s,') HYDROGRAPH DATA HYDROGRAPH FILE. UNUSED FILE RECORDS: 4- [ Q.) HYDROGRAPIA NUMBER: 1 DESCRIPTORv EXISTING 2 YR. FLOW MAX FLOQ .51 cis VOLUME. 02BI.73 ft::, HYDROGRAPH NUMBERv 2 DE3CRIPTOR' OUTFLOW CB#6. 25 YR FLOW MAX PLOW,- 1.65 cls VOLUMQ 24280.34 HVDROGRAPH NUMBERs 3 DESCRIPTOR; OUTFLOW C3#10. 25 YR INFLOW MAX FLOQ n3l cis VOLUME: ---777=07 FUND FILE. UNUSED FILE RECOROS; !'--' I -;' i ) ,41 1..; i'l BE R ; 1 POND DESCRIPTOR: 9 10-0 1 T --------------- POND STORAGE POND SHAPE. IRREGULAR (Based on TOTAL iNFLOW VOLUME! 24284.6/ ht... - elev/storme as inout) CORRESPONDING ELEV.- 18.37 ft POND BOTTOM ELEV. ?.50 Nt ELEVATION ATORAGE 10. K.'! SO.Q.) 12.00 2640. 0C.) Pam <� � ******************************************************+************************* 14.00 --------------- POND DISCHARGE --------------- TYPE HEIGHT DIMEN 1 COEFF 1 COEFF 2 DIMEN 2 1 8.82 it 1.63 in .62000 1 10.77 ft 3.13 in .62000 1 12.72 ft 15.00 in .62000 INITIAL WATER ELEVATION: ' 9.50 ft EVAPO-TRANSPIRATION LOSSES: 0.00 cis ELEVATION/DISCHARGE FOR OUTLET 1: ELEVATION (ft) 8.82 9.30 9.7S 10.25 10.73 11.69 13.36 15,03 16.7j 18.37 DISCHARGE (cfs) 0.00 .05 ,07 .�9 .10 .12 .15 .18 .20 .22 ELEVATION/DISCHARGE FOR OUTLET 2: ATIC� (ft/ 10.7- 11.l- 11.Mw 11.91 12.0 13.0-7. 14.3E 17.04 18.37 DlSCHARGE (cfs) 0.00 .16 .23 .28 .33 .40 .51 .59 .67 .73 ELEVATION/DISCHARGE FOR OUTLET 3: ELEVATION (ft) 12.72 13.00 13.29 13.57 13.85 DISCHARGE (cfs) 0.00 3.25 4.59 5.62 6.49 *******************************************+************************************ Paoe �� ******************************************************************************** 14.42 15.41 10.01 16.40 11.71 17.38 13.19 18.37 14.52 ________________________________________________________________________________ PCND NUMBER: 1 . POND DESCRIPTOR: BIO-DITCH --------------- POND STORAGE --------------- POND SHAPE. IRREGULAR (Based on TOTAL lNFLOW VOLUME: 24280.84 ft3 elev/storaoe as inout) CORRESPONDING ELEV: 18.37 ft POND BOTTOM ELEV: 9.50 ft ____________ TYPE HEIGHT 1 G.82 ft 1 10.77 fit- 1 12.72 ft --- POND DISCHARGE --------------- DIMEN 1 COEFF 1 CGEFF 2 1.63 in '62000 3.13 in 62000 15.00 in .62000 INITIAL WATER ELEVATION: 9,50 it | EVAPO-TRANSPIRATION LOSSES: 0.00 cfs DIMEN 2 --------------- POND ROUTING DATA --------------- ELAP5ED TOTAL TOTAL DOWNSTREAM WATER STORAGE TIME (mivo INFLCW OUTFLOW DUTFLOW ;cfs) ELEVATION (ft.'- VOLUME (ft0l 60. (cfs> 01 (cfs} .01 .01 9.5') 0,00 120.00 .08 .06 .06 9'60 16.43 180.00 .16 '08 .08 10.09 201.33 240.00 .23 .09 '09 10.40 594.82 300.00 .29 .14 ,14 10.86 1175,05 360.00 .36 ,28 .28 11.17 1579.90 420.00 .50 ,34 .34 11.49 1987.25 480.00 1.64 .47 .47 12.37 3910.15 540.Q0 ,45 .51 .51 12.70 5017.33 600.00 .38 ,50 .50 12.59 4642.98 660,00 .34 .48 ,43 12.47 4224.77 720.00 .32 .46 .46 12.31 3686.07 780.00 .27 '44 ,44 12.15 3155.32 840.00 .25 .41 .41 11.93 2552.81 900.00 .23 .35 .35 11.55 2067.05 960.00 .22 .30 .30 11.27 1709.32 1020.00 .19 .25 .25 11'09 1481.59 1080.00 .18 .20 .20 10.99 1343.14 1140.00 .18 .18 .18 10.95 1301.09 1200.00 .18 .18 .18 10.94 1289.56 1260.00 .18 .18 .18 10.94 1286.51 ******************************************************************************** ******************************************************************************** 1320.00 .18 .18 .18 10.94 1285.81 1380.00 .18 .18 .18 l0.94 1235.75 1440.00 .18 .18 .18 10.94 1285.86 1500.00 0.00 .10 .10 10.66 930.24 1560.00 0.00 .09 .09 10.40 591.62 1620.00 0.00 .08 ,08 10.16 280.63 1680.00 0.00 .06 .06 9'58 13.14 MAX TOTAL INFLOW: 1.65 cfs MAX TOTAL OUTFLOW: . 51 cfs � MAX DNSTR OUTFLOW. .51 cfs ~ MAX WATER ELEV: 12.71 ft ZZvv4��. MAX STORAGE VOL: RETAINED VOLUME: 5051.42 0.00 1t3 ft3 ^°', � \ � TIME (min) UI 1 " Inc .• I i u 1 n • 4! a?a AgC OM137 - AkF IeC GolfQ arse 1 _ '�itl , AmC ,•��5 �' \ Ur i I pA IF • K.~ �• - InC "f`` - - 1 r;------ Sew ge 0 P4 Dis to _ SIA — \ Ur Uri . ti - - I �f' e,= AkF i t � _ 1' s :12G ' ' : • . � `OQ s • 4�aA� 20 .. 11 16� g .t. i t::` 1.:. � . - � "a �. ' :longacrei'x 1 Mir ••i { ° AQUr M,Ur wo meal I .Y p , — ° Track' 1 I U t °••r,.:u•� I �V �•L _ ,� I Ur a > I s NB_ I 0 R rvoir F ar AgC py W O 2 So Tu n i 1. 2 W PU .. 1 , Sk i Wo i Pu ' 0 ® i - ' 1 AmC 25 .r sit. � n 69 �203 ti Ag9 111, 1 _ s T • aAgC Sk I a ° 451 iI II n Wo Ur �_ 'y. IAgC U ' f� IreAmC 11 •~• Tu Q a = Incn1 AHg v Nl �N'• nr So t-j . I AgD 7 mg >` Pu Wo -1 ; �1: ; i e WO Q�� M 194 S e j Agg.. - YI • a 1 - AVC Ur py I o Ur ' 3 Ng g I _.s 32 WO AgC ' r ' :. :�n. "0 ASg ' •.J: •I Ng I c •`� it .�ASC .•a I i, gr Re rr• °+ Warr, ' • W•♦ I� o �' Yr TanY• Ur I PY Os e a m •,`. W So 4o- a a r is ' Ma 1 •AgC - Agg I• Y Ng T ,,rIL Pu �Q 1 mC Ur kF AgC • t •i Ur • 1 0 ' Ortve- ' ,a R '•'s \ j rPk p. P os N® .. ♦ •Age .. g Pc n •,y •Wo AgC i' e ; t Uri Re ios a' AmC i 1 O ~ AmC•Ur - P� r �j ' • Agc Wo i M t �. �l + i� KING COUNTY, WASHINGTON, SURFACE WATER DESIGN MANUAL FIGURE 3.S.2A HYDROLOGIC SOIL GROUP OF THE SOULS IN KING COUNTY HYDROLOGIC HYDROLOGIC SOIL GROUP GROUP* SOIL GROUP GROUP* Alderwood C Orcas Peat D Arents, Alderwood Material C Oridla D Arents, Everett Material B Ovall C Beausae C Pdchudc C Bellingham D Puget D Briscot D Puyallup B Buckley - D Ragnar B Coastal Beaches Variable Renton D Earlmont Sat Loam D Rtverwrash Variable Edgewick C Salal C Everett A Sammamish D Indianola A Seattle D lgtsap C Shacar D luaus C Si Sat C Mixed Alluvial Land Variable Snohomish D Sultan Netltton A C Newberg B T IaWa D Urban Nooksadc C Variable Normal Sandy Loam D Woodinville D HYDROLOGIC SOIL GROUP CLASSIFICATIONS A (Low runoff potential). Sous having high Infiltration rates, even when thoroughly wetted, and consisting chiefly of deep, well -to -excessively drained sands or gravels. These sods have a high rate of water transmission. B. (Moderately low runoff potential). Soils having moderate Watration rates when thoroughly wetted, and consisting chiefly of moderately fine to moderately coarse textures. These sods have a moderate rate of water transmission. C. (Moderately high runoff potential). Sods having slow Infiltration rates when thoroughly wetted. and consisting chiefly of sods with a layer that Impedes downward movement of water, or sods with moderately fine to fine textures. These sods have a slow rate of water transmission. listing D. (High runoff potential). Sods having very slow Infiltration rates when thoroughly wetted and consisting chiefly of day sods with a high swelling potential, sills with a permanent high water table, soils with a hardpan or day layer at or near the surface, and shadow soils over nearly Impervious material. These sods have a very slow rate of water transmission. , From SCS. TR-55, Second Edition, June 1986. Exhibit A-1. Revisions made from SCS, Sod Interpretation Record, Form #5, September 1988. 3.5.2-2 2/89 r'. '#+ KING COUNTY, WASHINGTON, SURFACE WATER DESIGN MANUAL I�TABLE 3SZB SCS WESTERN WASIiINGTON RUNOF 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, 244hour 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 89 92 Meadow or pasture: 65 78 85 89 Wood or forest land: Wood or forest land: undisturbed young second growth or brush 42 64 76 81 55 72 81 86 Off: 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 G fair condition: grass cover on 50% 77 85 90 92 to 75% of the area Gravel roads and parking lots 76 85 89 91 72 82 87 89 Dirt roads and parking lots Impervious surfaces, pavement, roofs, etc. 98 98 98 100 100 100 100 Open water bodies: lakes, wetlands. ponds, etc. Single Family Residential (2) Dwelling Unit/Gross Acre % Impervious (3) is Separate curve number 1.0 DU/GA 1.5 DU/GA 20 shall be selected 2.0 DU/GA 25 for pervious and 2.5 OU/GA 30 impervious portion 3.0 DU/GA 34 of the site or basin 3.5 0U/GA 38 4.0 OU/GA 42 4.5 OU/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 aetanea oescnpuon or ay—tm4wal mill wv -__- - ---�- _- 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 2/89