erosion control/damage topic h. erosion & sentiment control defined by: – environmental...
TRANSCRIPT
Erosion & Sentiment Control
• Defined by:–Environmental Regulations–State and federal laws–Standard specifications, provisions and
plans–Cooperative agreement with DNR
Topic H
Resources
• Reference Documents and training aids–Construction and Materials Manual–Design Manual
• Outside Agencies–DNR–Consultants
Topic H
Silt Fence Requirements
• Silt fence is intended to be utilized as a perimeter control to intercept sediment laden runoff.
Topic H
Silt Fence Requirements
• ½ acre drainage area• Sheet erosion• 4 inch wide by 6 inch deep trench• 2 feet of fabric above ground• Stakes 2 feet in ground• Stakes 8 feet apart
Topic H
Other Sediment Control
• Storm drain inlet protection• Earth dikes• Sediment basins• Pipe slope drains• Vegetative cover
Topic H
Backslope Erosion
• Solutions:–Salvaged topsoil–Swale with protection–Intercepting embankment
Topic H
Silt Screen
• Prevents siltation• Containment protection• Doesn’t work in heavy flowing water
Topic H
Steel Sheet Piling
• In place prior to excavation.• Temporary• Heavy riprap will replace• Costly compared to silt screen–No displacement
Topic H