MD Erosion and Sediment Control
at-grade inlet protection - ANS-Lift Grate
Wrap with geotextile
Re-install grate
Cover with stone ¾"- 1 ½"
benching - ANS-Provides erosion control and vegetative establishment for extreme changes in
grade, provides subsurface drainage where necessary for slope stability, to be free of sediment
during construction
clear water diversion pipe - ANS-Used to convey clear water in conjunction with sand bags
around a work area in a drainage way,
Pipe size depends on contributing drainage area as shown below
compost - ANS-Decomposed organic material that is produced when bacteria in soil break down
garbage and biodegradable trash, making organic fertilizer
diversion fence - ANS-Directs a sediment laden runoff to a trapping practice
Intercepts and diverts clear water away from disturbed areas
Segments drainage areas
maximum drainage area 2 acres
earth dike - ANS-Directs a sediment laden water to traps, Diverts clear water away from
disturbed areas, Maximum drainage area (DA) and slope-10 acres & 10%, Dike to divert clear
water should be lined with matting or stone
filter bag - ANS-A geotextile bag which filters sediment laden water prior to discharge
filter berm - ANS-A temporary tubular barrier filled with compost filter media
filter log - ANS-A temporary berm of compacted wood chips or wood chips and compost
gabion baskets - ANS-Used in inflow and inlet protections, minimum 11 gauge wire, stone size
used to fill baskets 4-7"
, gabion inflow protection - ANS-A channel lined with wire baskets filled with rock
Baskets minimum 11 gauge wire
Galvanized Chain Link Fence - ANS-Used in super silt fence and diversion fence
incremental stabilization - ANS-Excavate and stabilize in increments less than 15', seeding and
mulching to be done as work progresses
mountable berm - ANS-an earth mound covered with geotextile and capped with stone.
allows construction vehicles to traverse an earth dike or other sediment control practices
Nonwoven geotextile - ANS-commonly used in practices like inflow and outflow protections, at
grade, median curb inlet protections, and in all dewatering practices
perimeter dike/swale - ANS-A combination of the earth dike and temporary swale,
Handles drainage areas less than 2 acres
pipe slope drain - ANS-Safely conveys runoff down the surface of a slope
maximum drainage area 7 acres
minimum slope 3 percent
plunge pool - ANS-Serves the same purpose as ROP
Preferred where there is space constraint
portable sediment tank - ANS-A compartmented container where water is pumped into the inner
pipe and discharged from the outer pipe
Settles and filters sediment laden water prior to discharge
Location to be shown on plans
removable pumping station - ANS-Removes and filters sediment laden water from excavations,
traps or basins
Preferred for long duration projects
To be installed concurrently with the construction of traps/basins
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