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HomeMy WebLinkAbout254.00 (replaced 2020)SECTION B SECTION A PLAN VIEW ACCESS COVER OR DOORS REQUIRED. WATER QUALITY (WQ) DESIGN WATER SURFACE (WS) INLET FIRST CELL SIZED FOR 25% TO 35% OF WETPOOL VOLUME WATER QUALITY (WQ) DESIGN WATER SURFACE (WS) 1.THIS DETAIL IS A SCHEMATIC REPRESENTATION ONLY. ACTUAL CONFIGURATION WILL VARY DEPENDING ON SPECIFIC SITE CONSTRAINTS AND APPLICABLE DESIGN CRITERIA. 2.THE VAULT SHALL BE SEPARATED INTO TWO CELLS BY A WALL OR A REMOVABLE BAFFLE. IF A WALL OR NON REMOVABLE BAFFLE IS USED, A 5-FOOT x 10-FOOT REMOVABLE MAINTENANCE ACCESS MUST BE PROVIDED FOR BOTH CELLS. 3.FOR VAULTS UNDER ROADWAYS, THE REMOVABLE PANEL MUST BE LOCATED OUTSIDE THE TRAVEL LANES. ALTERNATIVELY, MULTIPLE STANDARD LOCKING MANHOLE COVERS MAY BE PROVIDED. SPACING OF MANHOLE COVERS SHALL BE 12 FEET, MEASURED ON CENTER, TO FACILITATE REMOVAL OF SEDIMENT. LADDERS AND HAND-HOLDS NEED ONLY BE PROVIDED AT THE OUTLET PIPE AND INLET PIPE. 4.MINIMUM DIAMETER FOR ALL ACCESS OPENINGS, EXCEPT THOSE COVERED BY REMOVABLE PANELS, IS 36 INCHES. 5.REMOVABLE PANEL SHALL BE AT GRADE, HAVE STAINLESS STEEL LIFTING EYES, AND WEIGH NO MORE THAN 5 TONS PER PANEL. 6.VAULTS PROVIDING MANHOLE ACCESS AT 12 FOOT SPACING NEED NOT PROVIDE CORNER VENTILATION PIPES. VENTILATION PIPES SHALL BE CAPPED OR OTHERWISE COVERED, BUT DESIGNED SO THAT MAINTENANCE PERSONNEL CAN REMOVE FOR VENTILATION. 7.WHEN CONNECTING TO A NEW PIPE, USE A FLEXIBLE CONNECTOR (KOR-N-SEAL BOOT WITH CORRUGATED PIPE ADAPTER OR APPROVED EQUAL). WHEN CONNECTING TO AN EXISTING PIPE, USE A FABRICATED SAND COLLAR OF THE SAME MATERIAL AS THE CONNECTING PIPE. 8.SEE CONSTRUCTION PLANS FOR SPECIFIC PROJECT REQUIREMENTS. 5'x10' GRATE, GRATED ACCESS DOOR, OR LOCKING ACCESS PANEL OVER SECOND CELL. FOR VAULTS WHERE SURFACE AREA OF SECOND CELL IS GREATER THAN 1,250 SQUARE FEET, 4% OF THE TOTAL SURFACE AREA MUST BE GRATED AND A 5'x10' REMOVABLE LOCKING PANEL SHALL BE PROVIDED "V" SHAPED BOTTOM REMOVABLE BAFFLE OR WALL, SEE NOTE 2 WETPOOL WIDTH WETPOOL LENGTH 12" MIN. 12" MIN. REMOVABLE BAFFLE LADDER 2' MIN. 2' MIN. WETPOOL DEPTH 8' MAX. SIZE TO CONVEY 100-YEAR DESIGN FLOW WITHOUT OVERTOPPING, 6" MIN. 4" MIN. 16" MAX. FRAME AND SOLID COVER MARKED "DRAIN" WITH LOCKING BOLTS PER STD. PLAN 204.50 OUTLET WITH CAPACITY TO CONVEY 100-YEAR DESIGN FLOW WITHOUT OVERTOPPING GRAVITY DRAIN (IF GRADE ALLOWS). PLACE AS LOW AS GRADE ALLOWS BUT MUST BE 6" MIN. ABOVE THE BASE ELEVATION OF VAULT WALLS OR ABOVE SEDIMENT STORAGE AREA 3' MIN. AVERAGE SEDIMENT STORAGE 12" MIN. (FIRST CELL) BOTTOM SLOPE 0.5%-2% TOWARD INLET END BOTTOM SLOPE 0.5%-2% TOWARD OUTLET END OF SECOND CELL (RECOMMENDED) ACCESS DOORS OR REMOVABLE PANEL, SEE NOTE 5 AVERAGE 12" SEDIMENT STORAGE (FIRST CELL) 4' MIN. 7' MIN. NOTES: A BINLET OUTLET 8" MIN. GRAVITY DRAIN SEE NOTE 7 (TYP.) VALVE SEE NOTE 7 (TYP.) 12" MIN. VENTILATION PIPES AT CORNERS (TYP.), SEE NOTE 6 18" MAX. FROM CENTER OF FRAME TO STRUCTURE WALL FOR STEP ACCESS 6" MAX. FROM EDGE OF OPENING TO STRUCTURE WALL FOR STEP ACCESS 12" MIN. 5% MIN. (TY P . ) LADDER 2' MIN. FLOW RESTRICTOR COMBINED DETENTION AND WETVAULT STD. PLAN - 254.00 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