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HomeMy WebLinkAbout261.20 (3)NOTES: 1.UNDERDRAIN AGGREGATE SHALL MEET GRAVEL BACKFILL FOR DRAINS PER WSDOT STD. SPECIFICATION SECTION 9-03.12(4). 2.UNDERDRAIN TO BE 6" MIN. (PRIVATE), 8" MIN. (PUBLIC) SLOTTED PVC, SDR 35 PER ASTM D3034. SLOTS SHOULD BE CUT PERPENDICULAR TO THE LONG AXIS OF THE PIPE AND BE 0.04 TO 0.069 INCHES BY 1 INCH LONG AND BE SPACED 0.25 INCHES APART (SPACED LONGITUDINALLY). SLOTS SHOULD BE ARRANGED IN FOUR ROWS SPACED ON 45-DEGREE CENTERS AND COVER 1/2 OF THE CIRCUMFERENCE OF THE PIPE. SLOPE PIPE AT 0.5% MIN. UNLESS OTHERWISE SPECIFIED. PROVIDE ONE CLEANOUT MIN. PER 100 FEET OF UNDERDRAIN, AND AT EACH END. SEE STD. PLAN ######. 3.PIPE WILL HAVE A MINIMUM COVER DEPTH OF 12" AND BEDDING DEPTH OF 6". SEE PERMEABLE PAVEMENT SECTION STD. PLAN ###### DESIGNER TO SPECIFY CHECK DAM HEIGHT 3" MIN. KEY 12" MIN. DESIGNER TO SPECIFY DESIGNER TO SPECIFY SPACING DESIGNER TO SPECIFY SPACING 4" MIN. 10% MAX. SLOPE 1" MIN. CHECK DAM CLEARANCE 1 1 6" 6" MIN. BEDDING SEE PERMEABLE PAVEMENT SECTION STD. PLAN ###### 10% MAX. SLOPE 1" MIN. CHECK DAM CLEARANCE OUTFLOW SEE PERMEABLE PAVEMENT SECTION STD. PLAN ######2" MIN. 12" MIN. COVER 12" MIN. 12" MIN. SUMP CONTROLLED DENSITY FILL SUBSURFACE CHECK DAM 12" MIN. CLEAR CONCRETE BAND SUBSURFACE CHECK DAM UNDERDRAIN AND OVERFLOW CONTROL STRUCTURE WITH RISER GENERAL NOTES: 1.LOCATE UNDERDRAIN BELOW STRUCTURAL PAVEMENT BASE DEPTH. 2.SEE CONSTRUCTION PLANS FOR SPECIFIC PROJECT REQUIREMENTS. CONTROLLED DENSITY FILL SUBSURFACE CHECK DAM PER WSDOT SECTION 2-09.3(1)E (TYP.). CHECKDAM REQUIRED FOR SLOPE STEEPER THAN 5% COMMERCIAL CONCRETE SUBSURFACE CHECK DAM PER WSDOT SECTION 6-02.3(2)B (TYP.). CHECKDAM REQUIRED FOR SLOPE STEEPER THAN 5% DESIGN WATER SURFACE ELEVATION CONTROLLED BY OUTLET CONTROL JOINT (TYP.) (PERVIOUS CONCRETE ONLY) SLOTTED UNDERDRAIN, SEE NOTES 2 AND 3 DESIGN WATER SURFACE ELEVATION CONTROLLED BY OUTLET CONTROL JOINT (TYP.) (PERVIOUS CONCRETE ONLY) CLEANOUT PER STD. PLAN ######WATER LEVEL CONTROLLED BY OUTLET ELEVATION OUTLET ELEVATION, DESIGNER TO SPECIFY TYPE 1L CATCH BASIN (CB) PER STD. PLAN 200.10 OR OTHER STRUCTURE WITH APPROVAL UNDERDRAIN AGGREGATE, SEE NOTE 1 REMOVABLE PLUG FOR MAINTENANCE SLOTTED UNDERDRAIN PIPE, SEE NOTES 2 AND 3 SANITARY TEE WITH OPTIONAL RISER PIPE DESIGNER TO SPECIFY SUBSURFACE CHECK DAM HEIGHT 3" MIN. KEY 6" MIN. BEDDING SLOTTED UNDERDRAIN, SEE NOTES 2 AND 3 12" MIN. COVER 1 1 3' MAX. SUBGRADE PER STD. PLAN ###### SUBGRADE PER STD. PLAN ###### 6" SUBGRADE PER STD. PLAN ###### PERMEABLE PAVEMENT - SUBSURFACE CHECK DAMS AND UNDERDRAIN STD. PLAN - 261.20 PUBLIC WORKS DEPARTMENT APPROVED: DATEMartin Pastucha Public Works Administrator UNLESS OTHERWISE NOTED, DRAWING IS NOT TO SCALE (NTS) DocuSign Envelope ID: 3B1B34D3-7E0A-476C-ADB3-4329FFE0C108 8/13/2020 | 8:48 AM PDT