Loading...
HomeMy WebLinkAbout263.00 (replaced 2020)PLAN HOUSE 1 1/2" - 3" WASHED DRAIN ROCK HOUSE FLOW 2% SLOPE (1% MIN.) 4" CAPPED PVC OR GRATE INLET AT SURFACE FOR OBSERVATION ROOF DOWNSPOUT OVERFLOW SPLASH BLOCK FINE MESH SCREEN, SS 304 10x10 OR SIMILAR 6" MIN. DIA.SCH 40 PVC PIPE PER ASTM D1785 SIDES AND TOP OF ROCK LINED WITH NON-WOVEN GEOTEXTILE FOR SEPARATION PER WSDOT 9-33.2(1) CATCH BASIN (YARD DRAIN) ROOF DOWNSPOUT MIN. 12" X 12" CATCH BASIN (YARD DRAIN) DRYWELL SOLID LID OR GRATE MIN. 50 GALLON PLASTIC OR CONCRETE DRYWELL 15' MIN. AS REQUIRED, SEE NOTE 1 VARIES 12'' MIN. TOPSOIL 12" MIN. ABOVE SEASONAL HIGH GROUNDWATER OR HYDRAULICALLY RESTRICTIVE LAYER 5' MIN. SETBACK FROM BUILDING 12'' MIN. SUMP 24" MIN. 24" MIN. GENERAL NOTES: 1.WHEN LOCATED IN COARSE SANDS AND COBBLES, DRYWELLS MUST CONTAIN A VOLUME OF GRAVEL EQUAL TO OR GREATER THAN 60 CUBIC FEET PER 1,000 SQUARE FEET OF IMPERVIOUS SURFACE SERVED. WHEN LOCATED IN MEDIUM SANDS, DRYWELLS MUST CONTAIN AT LEAST 90 CUBIC FEET OF GRAVEL PER 1,000 SQUARE FEET OF IMPERVIOUS SURFACE SERVED. 2.SPACING BETWEEN DRYWELLS SHALL BE A MINIMUM OF 10 FEET. 3.REGULAR MAINTENANCE INCLUDING CATCH BASIN (YARD DRAIN) CLEANING (EVERY 6 MONTHS MINIMUM) IS ESSENTIAL TO THE LONG-TERM FUNCTIONING OF DRYWELLS. 4.CONNECT INLET PIPE TO CONCRETE DRYWELL USING PRECAST HOLE OR CORE DRILLED HOLE. 5.SEE CONSTRUCTION PLANS FOR SPECIFIC PROJECT REQUIREMENTS. 48" MIN. DIA. SPLASH BLOCK SECTION 48" MIN. NOTES: 1.DRYWELLS MUST BE SET BACK AT LEAST 15 FEET FROM BUILDINGS WITH CRAWL SPACE OR BASEMENT ELEVATIONS THAT ARE BELOW THE OVERFLOW POINT OF THE DRYWELL. DRYWELL PLAN AND SECTION STD. PLAN - 263.00 PUBLIC WORKS DEPARTMENT APPROVED: DATEGregg Zimmerman Public Works Administrator UNLESS OTHERWISE NOTED, DRAWING IS NOT TO SCALE (NTS) DocuSign Envelope ID: 6EECF5B6-602A-4E4A-B436-A317AA638878 9/28/2018 | 9:45 AM PDT