Tazewell County, IL Environmental Rules: Stormwater Management (2026)

Chapter 151, 'Erosion Control,' folds stormwater management into the county's erosion and sediment control permitting system administered by the Community Development Department's Erosion Control Administrator. 06 requires anyone starting a commercial, institutional, multi-family, or industrial project larger than half an acre, or any project needing subdivision approval on more than half an acre, to file for an erosion, sediment, and stormwater control permit, and the application must include design calculations for a permanent stormwater management system whenever the net increase in impervious area since April 15, 1996 exceeds half an acre.

12. 03(C) if the operating agency approves and the applicant shows no adverse flooding impact downstream, which can exempt the project from on-site permanent controls, though not from temporary measures during construction. 07 places an ongoing duty on the property owner: it must be maintained so it keeps functioning to the standards, an obligation that runs with the property, not just the original developer. 06(A)(8) runs $75 per acre, with a $450 minimum and $3,000 maximum, and agricultural projects are exempt from the fee.