HomeMy WebLinkAbout249.20B
ACCESS COVER OR DOORS REQUIRED.
Y
K
Q
m LADDER A
z A
0
5' X 10' GRATE OVER SECOND CELL
WETPOOL (MAY BE PROVIDED BY A GRATED
WIDTH 5'X 10' ACCESS DOOR OR PANEL)
A
"V" SHAPED
BOTTOM
REMOVABLE
BAFFLE OR WALL
SEE NOTE
OUTLET
WETPOOL LENGTH Fj OPEN PIPE FOR WETVAULT ONLY.
SEE DETETENTION VAULT FOR
PLAN VIEW COMBINED WATER QUALITY/
FRAME, GRATE AND NTS DETENTION VAULT OUTLET
LOCKING COVER MARKED B
"DRAIN" (TYP.)
SIZE TO MEET CONVEYANCE
DETENTION OPTIONAL REQUIREMENTS (CH.1)
LADDER
1' WQ DESIGN WS
INELT REMOVABLE
BAFFLE
- NOTE: CAPACITY OF OUTLET
FIRST CELL SIZED FOR f_ 1' WETPOOL - PIPE DESIGNED TO PEAK FLOW
25% TO 35% OF - Li_
WETPOOL VOLUME DEPTH V FOR WQ VAULTS 2' FOR CONVEYANCE
$ MAX' FOR COMBINED W.Q.
3' MIN. AND DETENTION VAULTS
2' min.
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
BOTTOM SLOPE 0.5%-2% - - STORAGE AREA
TOWARD INLET END
AVERAGE SEDIMENT STORAGE SECTION A -A
1' MIN. (FIRST CELL) NTS BOTTOM SLOPE 0.5-2% TOWARDS OUTLET
END OF SECOND CELL (RECOMMENDED)
ACCESS DOORS OR REMOVABLE PANEL
WQ DESIGN WS
T MIN.
AVERAGE 1' SEDIMENT STORAGE
(FIRST CELL)
AVERAGE 1' SEDIMENT STORAGE
(FIRST CELL)
SECTION B -B
NOTE: NTS
1.1. THE VAULT SHALL BE SEPARATED INTO TWO CELLS BY A WALL ORA REMOVABLE BAFFLE. IF A WALL OR NON REMOVABLE BAFFLE IS
USED, A 5 -FOOT C X 10 -FOOT REMOVABLE REMOVABLE MAINTENANCE ACCESS MOST BE PROVIDED FOR BOTH CELLS.
1.2. 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,
I y STD. PLAN — 249.20
+ + PUBLIC WORKS WETVAULT
DEPARTMENT
MARCH 2008