Flood Zones and Agricultural Dikes in Kittson County, Minnesota

A boundary-river dike rule that applies to a narrow set of Minnesota counties

Minnesota Rules parts 6115.1300 through 6115.1400 set specific standards for agricultural dike construction within the floodplains of the Red River of the North and the Bois de Sioux River -- the shared boundary waters between Minnesota and North Dakota. This isn't a statewide floodplain standard; it applies specifically to the handful of Minnesota counties along this stretch of boundary river, Kittson among them (alongside counties farther south such as Marshall, Pennington, Red Lake, Polk, Norman, Clay, Wilkin, Traverse, and Big Stone). For a Kittson County parcel with river frontage or floodplain overlap, this means an agricultural dike or levee project is governed by this specific rule set in addition to -- not instead of -- the county's general floodplain ordinance.

The rule's design standard is specific and worth knowing before assuming a farmstead is protected: levees intended to protect agricultural cropland under this framework are generally limited to protecting against floods up to the 10-year flood event, a materially lower design standard than the 100-year floodplain benchmark used for most residential and commercial flood-zone mapping. A landowner assuming a levee protects cropland at the same standard as a home's flood-insurance rating is very likely working from the wrong baseline.

Who actually issues the permit -- and an exemption for pre-existing farmstead dikes

Permitting authority under this framework is split between the state and the county: the DNR commissioner has the power to grant permits for levees in or adjacent to public waters, but that authority is subject to county board approval. In practice, the rules note that local floodplain ordinances -- ones that include agricultural-diking provisions as a conditional use and that the DNR commissioner has approved -- can supersede the state rule's default procedure, meaning the actual permitting process for a given Kittson County parcel may run substantially through the county's own floodplain ordinance and Zoning Administration office rather than directly through the DNR. Confirm with Kittson County Zoning Administration which process currently applies before assuming either the state or county process governs by default.

The rule also recognizes farmstead dikes as a distinct category: dikes built to protect farmstead structures (rather than cropland generally) can be exempt from some of this framework's permit provisions if they meet the specific conditions set out in Minn. R. 6115.1370. That's a meaningful distinction for a buyer evaluating an existing farmstead with a dike already in place near the river -- the presence of a dike doesn't necessarily mean a full agricultural-dike permit was required or issued, and confirming which category (farmstead exemption vs. a permitted cropland levee) applies to an existing structure is worth doing directly with the county or DNR before relying on it.

What this means for a Kittson County land purchase

• For any parcel with Red River of the North frontage or floodplain overlap, ask Kittson County Zoning Administration whether an existing or planned dike or levee falls under the county floodplain ordinance, the state Minn. R. 6115.1300-6115.1400 framework, or both.
• If cropland protection is part of the value you're placing on a parcel, remember the 10-year flood design standard for agricultural levees under this framework -- a much lower bar than the 100-year floodplain standard used for structures, so a levee-protected field can still flood in an ordinary flood year.
• If an existing dike protects farmstead buildings specifically, confirm with the county or DNR whether it falls under the farmstead exemption (Minn. R. 6115.1370) rather than assuming it required (or received) a full agricultural-dike permit.
• Because this rule set is specific to the Red River of the North and Bois de Sioux River boundary, it does not apply to inland Kittson County parcels away from that river corridor -- confirm which floodplain framework (this boundary-river rule vs. the county's general floodplain ordinance) actually governs a specific parcel before assuming either one by default.