MD Erosion and Sediment Control Review Questions and Correct Answers
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Course
Maryland E&S Certification
Institution
Maryland E&S Certification
Woven silt film used in silt fences, super silt fences and standard inlet protections
Woven monofilament used in temporary stone outlet and gabion outlet structures
Nonwoven geotextile commonly used in practices like inflow and outflow protections, at grade, median curb inlet protections, and in ...
MD Erosion and Sediment Control
Review Questions and Correct Answers
Woven silt film ✅used in silt fences, super silt fences and standard inlet protections
Woven monofilament ✅used in temporary stone outlet and gabion outlet structures
Nonwoven geotextile ✅commonly used in practices like inflow and outflow protections,
at grade, median curb inlet protections, and in all dewatering practices
Galvanized Chain Link Fence ✅Used in super silt fence and diversion fence
Gabion baskets ✅Used in inflow and inlet protections, minimum 11 gauge wire, stone
size used to fill baskets 4-7"
Compost ✅Decomposed organic material that is produced when bacteria in soil break
down garbage and biodegradable trash, making organic fertilizer
Stabilized construction entrance ✅Reduces tracking of Sediment onto roadways,
provides stable area for egress and ingress from construction site
Benching ✅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
Vegetative stabilization ✅Promotes establishment of vegetation on exposed soil
(disturbed areas) not stabilized by other methods, requires 95 % ground cover
Incremental stabilization ✅Excavate and stabilize in increments less than 15', seeding
and mulching to be done as work progresses
Vegetative Stabilization-Soil Preparation ✅requires seed bed preparation and
application of lime and fertilizer in the top 3"-5"soil by disking or other means
Soil stabilization matting ✅Material used to temporarily or permanently stabilize
channels or steep slopes until ground cover is established
Stockpile area ✅Side slopes not steeper than 2:1,
Access should be from the upslope side,
Runoff must drain to a sediment control practice
Follow benching criteria when height exceeds 20 feet
, Earth dike ✅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
Temporary swale ✅Directs a sediment laden water to traps
Perimeter dike/swale ✅A combination of the earth dike and temporary swale,
Handles drainage areas less than 2 acres
Temporary storm drain diversion ✅A temporary swale or pipe that directs a storm drain
system into a sediment basin or trap
Used to prevent sediment laden water entering a storm drain system and redirects it to
a trap or basin
Temporary asphalt berm ✅a temporary macadam mound which directs sediment
laden runoff to sediment control, intercepts and diverts clear water, and segments
drainage area
Clear water diversion pipe ✅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
Temporary barrier diversion ✅Diverts clear water channel flow around work area In a
drainage way,
Waterway construction permit required for a stream diversion
Mountable berm ✅an earth mound covered with geotextile and capped with stone.
Allows construction vehicles to traverse an earth dike or other sediment control
practices
Diversion fence ✅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
Pipe slope drain ✅Safely conveys runoff down the surface of a slope
Maximum drainage area 7 acres
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