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Davenport, IA Environmental Rules: Coastal Development (2026)

Some Restrictions
Compiled from the official code textEditor Martyn O'NeillLast verified September 2026

Key Facts

Waterway
Mississippi River (no ocean coast)
Buffer Trigger
Within 50 feet of waterway
Floodway
No stormwater treatment allowed
State Permit
Iowa DNR floodplain (Ch. 455B)
Federal
Army Corps Section 404

Summary

Davenport sits on the Mississippi River, not an ocean coast, so waterway development is governed by its stormwater and floodplain codes. Any project within 50 feet of a waterway triggers stormwater quality review regardless of size.

Development and redevelopment projects located within 50 feet of a natural waterway, modified natural waterway, or constructed channel or which include a new storm drain outfall to such waterway, regardless of project size or impervious surface. This requirement is intended to protect environmentally sensitive areas.

Source: Davenport Municipal CodeView official code

Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: rev 4820400; v43 updated 2026-03-11; through 03-11-2026).

Full Breakdown

Development within 50 feet of a natural or modified waterway, or that adds a new storm-drain outfall, must meet Chapter 13.34 stormwater quality standards regardless of project size, to protect environmentally sensitive riparian areas. Work in the floodway is tightly limited: stormwater treatment is not permitted there, and treatment in the 100- or 500-year floodplain must show a net ecological benefit. Riverfront and floodplain construction also follows Chapter 15.44, and work in the regulated floodway requires an Iowa DNR floodplain permit under Iowa Code Chapter 455B. Dredging or fill in the Mississippi additionally needs a federal Army Corps of Engineers Section 404 permit.

Violations & Fines

Building or grading within 50 feet of a waterway or in the floodway without required approvals draws stop-work orders under the stormwater and flood codes; unpermitted floodway work must be removed or the site restored.

Frequently Asked Questions

Is Davenport in a coastal zone?
No. Davenport is an inland Mississippi River city with no ocean coastline. Waterway rules come from its floodplain and stormwater codes and Iowa DNR, not a coastal commission.
Do I need a permit to build near the river?
Yes. Projects within 50 feet of a waterway trigger stormwater quality review, and floodway or riverbank work needs an Iowa DNR floodplain permit plus, for dredge or fill, an Army Corps permit.

Sources & Official References

Other rules in Davenport

Stormwater ManagementSome RestrictionsFlood ZonesHeavy RestrictionsErosion ControlSome RestrictionsAnimal Ordinances: Exotic PetsHeavy RestrictionsLandscaping Rules: Tree Removal & Heritage TreesSome RestrictionsLandscaping Rules: Weed OrdinancesSome RestrictionsLandscaping Rules: Tree TrimmingSome RestrictionsSign Regulations: Holiday DisplaysFew RestrictionsSign Regulations: Garage Sale SignsSome Restrictions

All Davenport rules

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