Southeast Michigan Council of Governments (SEMCOG)Created from USGS 7.5 minute Topographic Quadrangles. MIRIS digital base maps used as control reference. Identifies watershed boundaries and the direction of the water flow.ArcGIS FeatureLayerhttps://hub.arcgis.com/datasets/fc674c4db2f748639ca1539d19977833_30engSEMCOG Open DataPublicWatersheds [Michigan]Web servicesMichiganLast Modified: 2025-11-02