Will County enforces the Countywide Stormwater Management Ordinance (WCSMO) requiring erosion and sediment control plans for any land disturbance of 5,000 square feet or more. Silt fence, stabilized entrances, and inlet protection are required BMPs across Joliet, Bolingbrook, Plainfield, and unincorporated Will County.
The Will County Stormwater Management Ordinance (WCSMO), adopted under 55 ILCS 5/5-1062 county stormwater authority, requires Soil Erosion and Sediment Control (SESC) plans for any development disturbing 5,000 sq ft or more. Plans must comply with the Illinois Urban Manual BMPs. Required measures include perimeter silt fence, stabilized construction entrances (minimum 50 feet), inlet protection on all storm sewers, concrete washout containment, and temporary seeding within 14 days of inactivity. NPDES Permit ILR10 coverage required for disturbance of 1 acre or more under IEPA rules (415 ILCS 5/39). Municipalities including Joliet (Title 9), Bolingbrook (Title 10), Romeoville, and Plainfield (Chapter 34) enforce parallel standards through their MS4 permits. Final stabilization requires 70% uniform vegetative cover. With DuPage River and Des Plaines River watersheds running through the county, sediment-laden runoff toward Midewin and Argonne corridors triggers heightened enforcement.
Stop-work order for missing controls; daily fines $250-$2,500 under WCSMO Article 4. NPDES sediment discharge violations: IEPA penalties up to $10,000/day under 415 ILCS 5/42. Municipal fines in Joliet/Bolingbrook: $75-$750 per day. Failure to stabilize triggers forfeiture of performance security bond.
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