Flood Zones in Cass County, North Dakota

The diversion project is in its final construction push, not a distant future plan

As of 2026, the roughly $3.2 billion Fargo-Moorhead Area Diversion Project -- a 30-mile channel and 22-mile earthen embankment designed to route Red River floodwater around the metro area -- is in its final year of major construction, with the Metro Flood Diversion Authority reporting the project on track for substantial completion in fall 2026 and full operational readiness in time to provide protection for the 2027 flood season. The Authority has reported spending roughly $1 billion during 2026 alone (about $2.8 million per day) as crews finish excavating the diversion channel. This is not a speculative, decades-out proposal -- it's an active construction project entering its home stretch, and its completion timeline is a real, near-term factor for anyone evaluating land near the Red River or within the diversion's protected footprint.

Completion also carries a direct financial consequence for property in the protected area: once the project is certified by FEMA as providing the required level of flood protection, properties inside that certified area are expected to be freed from the federal flood-insurance purchase requirement that currently applies to many of them. That certification is a distinct, separate step from construction completion itself -- a project can be substantially built without yet having cleared FEMA's certification process for a given area -- so a buyer should not assume flood-insurance relief automatically follows a completion announcement without confirming certification status for the specific area in question.

A large, ongoing buyout and eminent-domain program has already changed land ownership along the corridor

Since 2009, close to 900 homes in Cass and neighboring Clay County (Minnesota) have been purchased with more than $250 million in combined local, state, and federal funds specifically to clear the way for flood-protection projects, including the diversion -- Cass County itself has bought roughly 175 of those homes for about $38 million, with the Diversion Authority purchasing additional homes directly. The Cass County Joint Water Resource District holds responsibility for acquiring the property rights the project still needs, and the Metro Diversion Authority has budgeted roughly $500 million total for property acquisition across the project's life. Acquisition hasn't been entirely voluntary: landowners in the project's path have faced eminent domain proceedings, including jury trials that set property values for parcels the Authority and landowners couldn't agree on through negotiation.

For a buyer, this means a parcel's relationship to the diversion project isn't purely a flood-risk question -- it can be a direct land-acquisition question. If a property sits within or near the diversion channel's footprint, the embankment alignment, or a staging or mitigation area still being finalized, ask directly whether the parcel (or a neighboring one) has been identified for acquisition, whether an offer has already been made, and whether any acquisition would proceed by negotiated purchase or eminent domain. A property already fully outside the project's footprint carries a very different practical picture than one still inside an active acquisition zone.

What to verify before treating a Cass County parcel's flood status as settled

1. Confirm the parcel's location relative to the diversion project's current alignment and protected-area boundary directly with the Metro Flood Diversion Authority (fmdiversion.gov) or Cass County's floodplain administration function -- boundaries and staging areas have been refined during construction and shouldn't be assumed from older project maps.
2. Ask whether the area including the parcel has received FEMA certification for the diversion's flood-protection level, and if not, what the current timeline for that certification is -- this determines whether the federal flood-insurance purchase requirement still applies.
3. If the parcel is anywhere near the diversion channel, embankment, or a documented buyout-program area, ask the Cass County Joint Water Resource District or the Diversion Authority directly whether it has been identified for acquisition, and at what stage that process stands.
4. Get the parcel's current FEMA flood-zone designation from the county's floodplain administration function or FEMA's Flood Map Service Center regardless of diversion-project status, since flood-zone maps can be updated independently of the diversion project's own construction timeline.
5. If mid-construction disruption matters to your use of the land (access roads, utility relocations, temporary staging), check the Diversion Authority's project-status and road-closure postings for the current construction year rather than relying on a general project description.