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