Flood Zones and Floodplain Permits in LaMoure County, North Dakota

A floodplain development permit is required before you build -- not just recommended

LaMoure County requires a Floodplain Development Permit for any party undertaking development within a designated floodplain, evaluated against the county's Floodplain Damage Prevention Ordinance before work begins. This isn't a formality layered on top of a building permit -- it's the mechanism the county uses to keep new construction, fill, or other development from either sitting in harm's way or worsening flood risk for neighboring property, and it applies whether or not the parcel is inside an incorporated city, since the county's floodplain permit process covers unincorporated land directly.

LaMoure County has designated its County Emergency Manager as the Floodplain Administrator -- meaning floodplain permit questions go to that office rather than a Planning & Zoning department (the county doesn't have one; recall from the hub that LaMoure's land-use zoning runs township-by-township rather than countywide). Floodplain permit applications are reviewed by the LaMoure County Commission on a quarterly cycle, based on the county's own posted permit-application document, so factor that review timeline into any construction schedule for a parcel near the James River rather than assuming a permit can be turned around immediately.

The maps themselves were mid-update as of December 2022 -- confirm which version is current

New preliminary Flood Insurance Rate Maps (FIRMs) covering Dickey, LaMoure, and Stutsman counties were released in December 2022, using updated data and modeling to redraw flood-risk boundaries along the James River system. A preliminary map is not automatically the effective, legally binding map -- FEMA maps typically go through a public comment and appeals period before becoming effective -- so a specific parcel's flood-zone designation could differ between the map in effect at the time of an old property listing and the current (or eventually finalized) map. Before relying on a flood-zone designation for insurance cost estimates or permit planning, confirm with FEMA or the county's Floodplain Administrator which map -- preliminary or effective -- currently governs the parcel.

LaMoure County also provides access to the North Dakota Risk Assessment MapService (NDRAM), a state tool that displays both the newer, more granular Base Level Engineering (BLE) approximate floodplains and the older, legally effective FEMA regulatory floodplains side by side for the same area. Because these two layers can show a different flood-risk picture for the identical parcel -- the BLE data reflects more current modeling while the regulatory floodplain is what actually triggers today's permit and insurance requirements -- a buyer should look at both rather than only the one that shows a more favorable result, and should not assume BLE data alone determines whether a floodplain permit is currently required.

What this means for a specific purchase decision

Put together with the hub's historical account -- record James River crests in 2019 and a formally declared flood emergency driven partly by upstream Jamestown and Pipestem Dam releases -- the practical buyer checklist for land anywhere near the James River in LaMoure County is: check the parcel against both NDRAM layers, confirm with the county's Floodplain Administrator (the Emergency Manager's office) whether the parcel currently requires a floodplain development permit for any planned construction, and, if it does, budget for the county commission's quarterly review cycle rather than assuming a fast turnaround. None of this replaces a lender's or insurer's own flood-zone determination at closing, but it's the difference between arriving at that determination informed versus finding out for the first time from an insurance quote.