Michigan Department of Natural ResourcesNatural Rivers Polygons queried from the hydro polygon data. This data is derived from the DNR Reference Hydro Line of the DNRHydrologyOPENDATA service Michigan's Natural Rivers program is a river protection effort that protects the natural quality of select river systems throughout the state by regulating their use and development through zoning rules. The Natural Rivers Program was developed to preserve, protect and enhance our state's finest river systems for the use and enjoyment of current and future generations by allowing property owners their right to reasonable development while protecting Michigan's unique river resources. There are 16 designated Natural River systems in Michigan. The designation includes the mainstream, as well as most of the tributaries. Nearly all construction, land change/earth moving, and placement of structures is regulated within 400-feet of any designated stream segment. Please consult with Natural Rivers Program staff for specific regulatory determinations.ArcGIS FeatureLayerhttps://hub.arcgis.com/datasets/1a3a781aae8648c8a5f927f468b371f9_2engState of Michigan Open Data PortalPublicNatural Rivers [Michigan]Web servicesMichiganLast Modified: 2026-01-06