Construction site BMPs and their function and control mechanisms
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BMP function | BMP types | Erosion prevention (EP) or sediment control (SC) mechanism |
---|---|---|
Planning | Planning, sequencing, and scheduling | Minimize bare area and exposure period (EP) |
Preservation and protection designation | ||
Land clearing planning and staging | ||
Land grading planning and staging | ||
Lot benching | Lengthen flow path and reduce velocity of runoff (EP) | |
Borrow and stockpile area protection | Prevent soil detachment and transport (EP) | |
Construction road stabilization | ||
Trackout prevention | ||
Temporary stream crossings | Protect stabilized channel from erosion (EP) | |
Permanent stream crossings | ||
Drainage management | Temporary run-on diversions | |
Temporary right-of-way diversions | ||
Right-of-way diversions (water bars) | ||
Temporary stream diversions | Redirect flow away from work areas (EP) | |
Cofferdams and barriers | ||
Ditch and channel protection | Protect channel from erosive flows (EP) | |
Check dams | Prevent downcutting, settle sediment (EP, SC) | |
Temporary slope drains | Protect slope from erosive flows (EP) | |
Temporary outlet controls | Protect outlet area from scour erosion (EP) | |
Sediment ponds | Slow flows and settle out sediment (SC) | |
Sediment traps | ||
Dewatering discharge management | Filter and settle out sediment particles (SC) | |