HomeMy WebLinkAbout249.10SLOPE VEGETATION
PER DETENTION
FACILITY REQUIREMENTS
INLET
2' MIN. /
INLET EROSION CONTROL/
SLOPE PROTECTION PER
DETENTION FACILITY
REQUIREMENTS
SEDIMENT STORAGE
DEPTH = V MIN.
WETPOOL FLOW LENGTH = 3 (MIN.) X WIDTH
FIRST CELL
DEPTH 4' MIN. WETPOOL DEPTH 8' MAX. RECIRCULATION
TO 8' MAX. RECOMMENDED FOR DEPTH > 6'
OUTLET PIPE INVERT AT
WETPOOL WS ELEVATION
EMERGENCY OVERFLOW—WS---7--
VERFLOW WS $ZINVERT
INVERT6" MIN.
OVERFLOW WS 7
BELOW TOP
OFINTERNAL
W Q DESIGN WS y
BERM. LOWER
12" min.
PLACEMENT
IS DESIRABLE
18" MIN.
GRAVITY DRAIN
(IF GRADE ALLOWS)
8" MIN. DIAMETER
VALVE
(MAY BE LOCATED INSIDE MH
OR OUTSIDE WITH APPROVED
OPERATIONAL ACCESS)
1 ft� \ p EMERGENCY OVERFLOW WS
v OVERFLOW WS
v WQ DESIGN WS
EMERGENT VEGETATION
KEYED REQUIRED FOR WETPOOL
DEPTHS TOR LESS
NOTE: BERM SLOPE MAYBE
2:1 WHEN TOP SUBMERGED
1' BELOW WQ DESIGN WS
SECTION A -A
NTS
ACCESS ROAD
MANHOLE OR
TYPE 2
CATCH BASIN
SECTION B -B
NTS
NOTE:
1. See detention facility requirements for location and setback requirements.
2. All facilities shall be fenced. Fence shall be provided around facility allowing proper maintenance
of the facility.
3.This detail is a schematic representation only. Actual configuration
will vary depending on specific site constraints and applicable
design criteria.
4.Access Road shall meet the following design criteria.
4.1. maximum grade shall be 15 % for asphalt paving and 12 % for gravel or modular grid paving.
4.2. Outside turning radius shall be 40 feet, minimum.
4.3. Fence gates shall be located only on straingh section of road.
4.4. Access roads shall be 15 feet in width on curves and 12 feet n straight sections.
4.5. A paved apron shall be provided where access roads connect to paved public roadways.
FENCE REQUIRED FOR SIDE SLOPES
STEEPER THAN 3(V):1(H)
CAPACITY OF OUTLET SYSTEM
SIZED TO PASS PEAK FLOW FOR
CONVEYANCE REQ.
EXTERIOR BERMS DESIGNED PER
DAM SAFETY REQUIREMENTS
IF APPLICABLE
I 'y STD. PLAN - 249.10
+ + PUBLIC WORKS TYPICAL WETPOND SECTIONS
DEPARTMENT
MARCH 2008