Construction sites in Oak Lawn must implement erosion and sediment control measures to prevent discharge of sediment to storm sewers and neighboring properties. Projects disturbing 1 acre or more require an IEPA NPDES construction permit. MWRD WMO requires controls at 0.5 acres.
Erosion and sediment control is required on all construction sites in Oak Lawn. Standard best management practices include silt fence around the perimeter of disturbed areas, construction entrance pads (tracking control) to prevent sediment tracking onto streets, inlet protection for storm drains, stabilization of disturbed areas within 7-14 days of final grading, preservation of existing vegetation where possible, and proper concrete washout containment. Projects disturbing 1 acre or more require an Illinois EPA NPDES Construction General Permit with a Stormwater Pollution Prevention Plan (SWPPP). MWRD's WMO triggers erosion control requirements at 0.5 acres. Oak Lawn enforces erosion control at building permit inspection and may stop work for violations. Residential projects, while below regulatory thresholds, are still responsible for preventing sediment discharge to neighboring properties and public rights-of-way. Dumping or tracking mud onto streets can result in cleanup requirements and fines.
Failure to implement required erosion controls may result in stop-work orders, cleanup requirements, and fines from $100 per day. Sediment discharge to storm sewers can also trigger MWRD and IEPA enforcement with substantial civil penalties.
Oak Lawn, IL
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Oak Lawn, IL
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Oak Lawn, IL
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Oak Lawn, IL
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Side-by-side rule comparisons with other cities in Cook County.
See how other cities in Cook County handle erosion control.
See how Oak Lawn's erosion control rules stack up against other locations.
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