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HomeMy WebLinkAboutP_CompensatoryStorage-181213_V2.pdfMAPLE VALLEY HWYFLOODWAY100-YEAR FLOODPLAIN2-FT CONTOUR PROPOSEDCONTOUR EXISTINGCUT (> 6")FILL (> 6")PROJECT MANAGER: DESIGNED: DRAFTED: CHECKED:SHEET SIZE:ORIGINAL PLAN IS 22" x 34".SCALE ACCORDINGLY.BY© Copyright- The Watershed CompanyDATE PRINTED BY FILENAME THEWATERSHEDCOMPANYS c i e n c e & D e s i g n750 Sixth Street SouthKirkland WA 98033p 425.822.5242www.watershedco.comJOB NUMBER:SHEET NUMBER:SUBMITTALS & REVISIONS DESCRIPTIONDATENO.CEDAR RIVER APARTMENTS SRM DEVELOPMENT 1915 MAPLE VALLEY HWY RENTON, WA 98057SSLMLMSS17031412-12-2018 PERMIT SET LMCOMPENSATORY STORAGE1 OF 1200'50'25'0100'54525048464 4 423844423644100-YEAR FLOODPLAIN100-FT SHORELINE BUFFER2-FT CONTOURCUT WALL DOWN TO 35'NOT FORCONSTRUCTIONAPPROXIMATE FLOODWAYLEGEND40CUT AND FILL CALCULATIONSFLOODPLAIN CUT = 1,373.8 CYFLOODPLAIN FILL = 883.3 CYNET CUT = 490.5 CYWASHOUT BASIN ADDED STORAGE = 2,125.6 CYNET INCREASE IN FLOOD STORAGE = 2,616.1 CYWASHOUT BASIN*CEDAR RIVERNOTES1.WASHOUT BASIN IS DEAD FLOODPLAINSTORAGE. CUTTING THE SOUTH WALL DOWN TO35' WILL CREATE ACTIVE FLOODPLAIN STORAGE.VERTICAL DATUMNAVD 88 PER CITY OF RENTON VERTICALCONTROLPROPOSED 1%CHANCE ANNUALFLOOD BOUNDARY