HomeMy WebLinkAboutSW23004836On-Site BMP(s) Used: Infilitration Trenches
On-Site BMP
Site Plan
Drainage
4” flexible
corrugated pipe
4” rigid
perforated pipeDOWNSPOUTDOWN
SPOUT
DOWN
SPOUT
DOWN
SPOUTDOWNSPOUT w/ EXTDOWN
SPOUTDOWNSPOUTDOW
N
SPOU
T
CB sump
w/solid lid
CB sump
w/solid lid
All downspouts to be connected
to 4” flexible corrugated pipe
for flow into catch basin, to be
distributed by infiltration trench.
YARD
17’ x 3’ x 3’ Infiltration Trench
filled with 3/4” to 1-1/2” washed rock.
Gravel storage volume 153ft 3
Drain field pipe to be 4“ rigid or 6” flexible
perforated pipe.
Trench to be covered with filter fabric
& 6” compacted backfill.& 6” compacted backfill.
YARD
INFILTRATION TRENCH DETAIL
WASHED ROCK 3/4” to 1-1/2”30”
6”
6”
FINE MESH
SCREEN
CB SUMP
W/SOLID LIDFILTER FABRICCOMPACTED
BACKFILL
LEVEL 4” RIGID or 6” FLEXIBLE PERFORATED PIPE