Hennepin County and its watershed districts require erosion and sediment control measures on grading projects to prevent runoff into lakes, creeks, and the Mississippi River.
Construction sites in Hennepin County must install perimeter silt fence, inlet protection, and stabilized rock entrances before earthwork begins. Disturbed soils must be temporarily stabilized within seven days when grading pauses. Watershed districts including Minnehaha Creek and Bassett Creek inspect sites and may impose stop-work orders. The county also enforces erosion control on its own road and bridge projects under the MS4 permit. Final stabilization with vegetation or pavement is required before bond release. Discharges of sediment-laden water to wetlands, Lake Minnetonka, or Minnehaha Creek can prompt MPCA enforcement.
Failing to install or maintain erosion controls can result in daily fines, restoration orders, and bond forfeiture by the county or watershed district.
Hennepin County, MN
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See how Hennepin County's erosion control rules stack up against other locations.
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