How Des Moines Handles Environmental Rules: A Practical Guide
Des Moines maintains 123 local ordinances across all categories, and 5 of those deal specifically with environmental rules. Here is a breakdown of what the city actually requires, what is prohibited, and where Des Moines falls on the strict-to-permissive spectrum compared to other cities.
Boat Dock Permits
Building a dock, pier, or other structure in the Des Moines River or Raccoon River, or driving pilings into the riverbed or bank, requires city council consent after review by the plan and zoning commission and engineering department.
Key details: Approving body: City council. Recommends first: Plan & zoning commission, engineering dept.. Waters covered: Des Moines River, Raccoon River, banks. Insurance required: $1,000,000 general liability minimum. Governing law: Municipal Code Ch. 130, Art. III.
Constructing or maintaining a dock without council consent, or failing to remove an unpermitted obstruction on order, is a misdemeanor punishable by fine or a municipal infraction subject to civil penalty under § 130-111 (chapter 130 general penalty).
This is not one of those rules that cities tend to ignore. Des Moines actively enforces its boat dock permits requirements.
Erosion Control
Des Moines requires a city engineer grading permit before you strip, excavate, fill, or install drainage pipe on most sites, with numeric thresholds triggering the requirement.
Key details: Permit issuer: City engineer. Review time: 15 working days. Fee: $120 + $10/acre. Trigger example: 500+ sq ft near a waterway. SWPPP required: Sites of 1+ acre.
Grading without a required permit, or failing to complete work per the approved plan, can be treated as a public nuisance under §§ 42-347–42-348; the city may abate it and assess the cost against the property under § 42-91 and Iowa Code § 364.12(3)(h). The application fee is $120 plus $10 per acre or portion thereof (§ 42-89).
Stormwater Management
Des Moines requires a stormwater management plan for any development adding more than 10,000 square feet of new impervious area, following Iowa Stormwater Management Manual standards enforced by the city engineer.
Key details: Trigger: 10,000+ sq ft new impervious area. Governing standard: Iowa Stormwater Management Manual (ISWMM). Enforcement: City engineer, Dept. of Public Works. Compliance document: Recorded Stormwater Facility Maintenance Agreement. Penalty: Misdemeanor or municipal infraction fine.
Failure to install, maintain or repair required stormwater BMPs is a misdemeanor or municipal infraction under § 42-566, plus administrative penalties, cost-of-abatement assessments and possible termination of storm sewer access.
Flood Elevation Requirements
New construction and substantial improvements in Des Moines floodplains must elevate the lowest floor at least three feet above the 100-year base flood elevation, the city's required freeboard margin.
Key details: Freeboard required: 3 feet above base flood elevation. Applies to: new or substantially improved structures. Permit needed: certificate of compliance (§ 50-35). Administered by: city engineer (§ 50-32.05). Nonresidential option: floodproofing instead of elevating.
Building without a certificate of compliance is a misdemeanor under § 1-15 or a municipal infraction civil penalty per § 50-36; the city engineer can also deny or revoke building, grading, subdivision and zoning-compliance permits until standards are met.
Flood Zones
Des Moines requires a certificate of compliance before any construction, fill, or grading in a mapped floodplain, with elevation and floodproofing standards enforced by the city engineer.
Key details: Governing chapter: Municipal Code ch. 50. Permit required: Certificate of compliance. Administered by: City engineer. Floodway fill/construction: Generally prohibited. Base date for standards: Feb. 4, 1981.
Unpermitted floodplain development is a misdemeanor under § 50-36, punishable by the fine set in § 1-15, or a municipal infraction carrying a civil penalty; each day of noncompliance can count separately.
This is one of the stricter rules in Des Moines's municipal code. If you are unsure whether your situation complies, it is worth checking with the city before proceeding.
The Bottom Line
Des Moines is tougher than many cities when it comes to environmental rules. Out of the 5 rules covered here, 2 are rated strict. If you are a homeowner, renter, or business owner in Des Moines, take the time to understand these requirements before they become a problem. Most violations come with fines, and some repeat violations can escalate.
All of the above reflects Des Moines's municipal code as of our last review. If you need specifics on fines, exemptions, or filing requirements, the detailed ordinance pages linked above have the full breakdown.