HomeMy WebLinkAbout254.00AVERAGE 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 OR A 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,
�
+ Y � + PUBLIC WORKS COMBINED DETENTION AND STD. PLAN - 254.00
�NTo� DEPARTMENT WETVAULT
MARCH 2008
B
ACCESS COVER OR DOORS REQUIRED.
Y
K
Q
m
z
LADDER A
A
0
5' X 10' GRATE OVER SECOND CELL
(MAY BE PROVIDED BY A GRATED
WETPOOL
5'X 10' ACCESS DOOR OR PANEL)
WIDTH
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
6" - REQUIREMENTS(CH.1)
1'
WQ DESIGN WS
INELT
REMOVABLE
y
BAFFLE
- NOTE: CAPACITY OF OUTLET
FIRST CELL SIZED FOR
_ 1'
WETPOOL
LADDER ! PIPE DESIGNED TO PEAK FLOW
25 % TO 35 % OF
WETPOOL VOLUME
-
LJ DEPTH
- FOR CONVEYANCE
8' MAX.
-
T MIN.
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 OR A 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,
�
+ Y � + PUBLIC WORKS COMBINED DETENTION AND STD. PLAN - 254.00
�NTo� DEPARTMENT WETVAULT
MARCH 2008