Ankeny, IA Environmental Rules: Erosion Control (2026)
Key Facts
- Permit name
- COSESCO permit
- Triggered by
- City building permit for new construction/addition
- Also required with
- IDNR NPDES General Permit No. 2
- SWPPP preparer
- Licensed engineer, landscape architect or CPESC
- Enforcement officer
- Storm Water Coordinator
- Penalty
- Up to $750 first offense, $1,000 repeat
Summary
Anyone who needs a City of Ankeny building permit for new construction or a commercial or industrial addition must also get a Construction Site Erosion and Sediment Control (COSESCO) permit before work starts, on top of any state IDNR General Permit No. 2 coverage. The permittee carries primary responsibility for compliance under both permits.
Any person, entity, sole proprietorship, partnership, corporation, State agency or political subdivision ("applicant" or "person"): ... B. required to obtain a building permit from the City of Ankeny for new construction and/or a commercial or industrial addition shall also be required to obtain from the City a Construction Site Erosion and Sediment Control Permit (COSESCO permit) in addition to and not in lieu of any State IDNR authorization for coverage.
Full Breakdown
Ankeny Code of Ordinances Chapter 169 requires a COSESCO permit from anyone triggering coverage under the Iowa DNR's NPDES General Permit No. 2 or a City building permit for new construction or a commercial/industrial addition. Applications go through the Public Services Building and must include the SWPPP, IDNR Notice of Intent materials, and evidence of state permit approval, prepared by a licensed professional engineer, landscape architect, certified professional in erosion and sediment control (CPESC), or Soil and Water Conservation District representative, and the SWPPP must comply with the Statewide Urban Design Standards (SUDAS).
An applicant may be required to post security under Section 200.39, and fees follow a schedule set by City Council resolution. A COSESCO permit must be obtained before or at the same time as the building permit, plat approval, or Planning and Zoning site plan approval. The Storm Water Coordinator, acting as enforcement officer, conducts scheduled and unannounced inspections at each construction phase, from grading through final stabilization, and permittees have an absolute duty to report any noncompliant storm water discharge within one business day. Construction must stop the moment the City identifies noncompliance and cannot resume until conditions are resolved.
Violations & Fines
Violations are enforceable by civil action, including injunctive relief, with the City entitled to recover attorney fees and costs, and separately as a municipal infraction under Iowa Code Section 364.22 through Chapter 4 (up to $750 for a first offense, up to $1,000 for each repeat offense, with each day of a continuing violation counted as a repeat). The enforcement officer can also issue a written stop work order halting all site work immediately.
Frequently Asked Questions
Who enforces Ankeny's erosion control permit?
When must I get the COSESCO permit?
What happens if I discharge storm water in violation of my SWPPP?
Can the City stop construction for an erosion control violation?
Sources & Official References
Other rules in Ankeny
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