HomeMy WebLinkAboutEX_09_P_Preliminary_Drainage_Control_Plan_221026_v1PROPOSED DETENTIONVAULTCB #1, TYPE 1RIM=404.73IE 12"∅=401.73 (E)CB #2, TYPE 1RIM=405.27IE 12"∅=401.55 (W,S)CB #4, TYPE 1RIM=404.23IE 12"∅=399.33 (W,E)CB #6, TYPE 1RIM=401.78±IE 12"∅=397.16± (S,E,N) (IE PER GIS)69 LF 12"∅ ADS N-12 @ 0.5% MIN47 LF 12"∅ ADS N-12@0.5% MIN12 LF 12"∅ ADS N-12 @ 0.5% MIN92 LF 12"∅ ADS N-12 @ 0.5% MINTRENCH DRAINOIL WATERSEPARATOR44 LF 12"∅ ADS N-12 @ 0.5% MINCB #3, TYPE 2 48"∅RIM=404.81IE 12"∅=399.09 (N,W,E,S)CB #5, TYPE 1RIM=402.69IE 12"∅=399.69 (E)33 LF 12"∅ ADS N-12 @ 0.5% MIN73 LF 12"∅ ADS N-12@0.5% MINRIGHT OF WAYDEDICATIONRIGHT OF WAYDEDICATIONPRELIMINARY1 INCH = 20 FEET (22"x34")GRAPHIC SCALE402001 INCH = 40 FEET (11"x17")PRELIMINARY DRAINAGE
CONTROL PLAN
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MICHELLE WOODWARD PHONE:(469) 458-0485 BENSON-PETROVITSKYA PORTION OF SECTION 29, TOWNSHIP 23, RANGE 05, W.M.,CITY OF RENTON, KING COUNTY, WASHINGTONJ. RAUSCHB. ALLENJ. RAUSCH2923 N03 E2022.10.2519-04519-045-CC224CALL 811 AT LEAST 48HOURS BEFORE YOU DIGVERIFICATION NOTEALL EXISTING UTILITIES IN THE CONSTRUCTION AREA SHALL BEIDENTIFIED AND VERIFIED FOR DEPTH AND LOCATION PRIOR TO ANYCONSTRUCTION ACTIVITIES SO TO IDENTIFY ANY POTENTIAL CONFLICTSWITH PROPOSED CONSTRUCTION. CONTACT PROJECT ENGINEERIMMEDIATELY IF ANY CONFLICTS ARE IDENTIFIED.PRIOR TO ANY CONSTRUCTION ACTIVITIES, VERIFY EXISTINGTOPOGRAPHY IS CONSISTENT WITH WHAT IS SHOWN ON PLANS AND IFTHERE ARE ANY POTENTIAL CONFLICTS WITH PROPOSED CONSTRUCTIONACTIVITIES. CONTACT PROJECT ENGINEER IMMEDIATELY IF ANYCONFLICTS ARE IDENTIFIED.DETENTION VAULT NOTESUNDERGROUND DETENTION VAULT WILL BE DESIGNED WITH PAVEMENTSURFACE SO TO MEET OR EXCEED THE LOADING REQUIREMENTS OF FIRETRUCKS AND APPARATUS.PUMP SYSTEM WILL BE DESIGNED TO MATCH STREAM DURATION FLOW RATES.VAULT STATISTICS:VAULT BOTTOM ELEVATION:394.00'TOP OF SEDIMENT STORAGE:394.50'DESIGN WATER SURFCE:401.50' (7' LIVE STORAGE)VAULT INSIDE TOP ELEVATION:402.00' (0.5' FREEBOARD)VAULT STORAGE VOLUME @401.50:27,000 CFCONTROL STRUCTURE STATISTICSTOP OF RISER ELEVATION:401.50RISER DIAMETER:18"RESTRICTOR PLATE ORIFICE DIAMETER:0.6"RESTRICTOR PLATE ORIFICE HEIGHT:394.50ORIFICE #2 DIAMETER:0.25"ORIFICE #2 HEIGHT:397.50ORIFICE #3 DIAMETER:0.125"ORIFICE #3 HEIGHT:399.50OUTLET CONTROL STRUCTUREBAYFILTER WATER QUALITY DEVICE2-CHAMBER PUMP SYSTEMDETENTION VAULT27,000 CF LIVE STORAGE50.0'78.0'EX. 12" STORM MAINEXHIBIT 9RECEIVED12/21/2022 JDingPLANNING DIVISIONDocuSign Envelope ID: AA4FA6BA-AA72-4A92-A78C-D1916105F712