Wetlands and Federal Wetland Easements in Foster County, North Dakota

Foster County is one of only two counties inside the Arrowwood Wetland Management District

The U.S. Fish & Wildlife Service's Arrowwood Wetland Management District, established in 1961 and headquartered at Arrowwood National Wildlife Refuge near Pingree in adjacent Stutsman County, covers Foster and Eddy counties specifically -- a narrower footprint than the broader Prairie Pothole Region description might suggest, and one that puts Foster County squarely inside it. The district totals roughly 28,922 acres, including 28 Service-owned Waterfowl Production Areas totaling about 6,162 acres, plus more than 19,000 acres of private land held under wetland and grassland easement agreements across roughly 314 separate easement instruments districtwide.

For a Foster County land buyer, the practical implication is that a specific parcel -- including active cropground that shows no obvious wetland today -- can carry one of these recorded easements from a past owner's agreement with the Service, decades before your purchase. The district's proximity (its headquarters sits just a few miles from the Foster County line) means district staff are a genuinely local, easy point of contact rather than a distant regional office.

What a wetland easement restricts, and a federal rule that's actively in flux

Selling a wetland easement to the Fish & Wildlife Service means the specific wetlands it covers cannot be drained, filled, leveled, or burned by the current or any future owner -- the restriction runs with the land. The Service has also advised that installing a structure that diverts water away from an easement-protected wetland, even from outside the wetland's exact boundary, can itself violate the easement.

This area of federal policy is not settled. In 2024 the Service issued a drain-tile setback rule meant to give landowners legal assurance: install tile elsewhere on the parcel following the Service's current setback distances, and don't later modify the system, and the Service will not treat the easement wetland's eventual drainage as a violation. That rule has become a live political dispute heading into fall 2026 -- North Dakota Senator Kevin Cramer has said he'll block future federal wildlife-agency nominees over how the rule is being applied, and a 2025 lawsuit from a farmer in nearby LaMoure County alleges the Service changed the terms of a 1963 easement without the landowner's consent. None of this changes what's already recorded against a specific Foster County parcel, but it signals the rules around nearby drainage work are being actively renegotiated -- get the district's current position in writing before relying on an informal description of the rule.

How to check a specific Foster County parcel

1. Call the Arrowwood Wetland Management District office directly and ask whether the specific legal description you're buying carries an existing FWS wetland or grassland easement, and request the recorded easement map if one exists.
2. Have the title company or the Foster County Recorder specifically flag any recorded instrument naming the United States of America or the U.S. Fish & Wildlife Service as grantee in the parcel's chain of title.
3. Before installing or extending drain tile anywhere on the parcel, get the district's current setback guidance in writing for that specific field.
4. If the land will be enrolled in a USDA farm program, separately check the parcel's NRCS wetland ("Swampbuster") determination, since that is a related but distinct federal determination from an FWS easement.