In addition to the above 87 Manual, wetland determinations/delineations in Minnesota must utilize the appropriate regional supplement in accordance with the Land Resource Region (LRR) where the determination/delineation is being conducted. The following LRR map defines each LRR in Minnesota using the closest fit township boundary. Region "M" should utilize the Midwest Regional Supplement, region "K" the NC/NE Regional Supplement and region "F" the Great Plains Regional Supplement.

Certain aspects of the regional supplements such as hydric soils indicators and the wetland plant list are frequently updated, and users should consult the latest version. Links to current versions are provided in the text of the supplements and under the Wetland Delineation Guidance and Resources page of this website.