This data release was produced as part of the Milwaukee Area Watercourse Corridor Study in partnership with the Milwaukee Metropolitan Sewerage District (MMSD) to monitor and assess stream water quality within studies of aquatic communities, geomorphology and habitat, water and sediment, and streamflow. This dataset contains two vector datasets of stream geomorphic characteristics, pre-settlement vegetation, and geomorphic setting attributes derived for the Wisconsin Department of Natural Resources 1:24,000-scale Hydrography Dataset flowline network in the Kinnickinic River and Menomonee River sub-basins of the Milwaukee River basin in eastern Wisconsin. The attributes used in the classification of network reaches were derived from publicly available county, state, and national datasets and include channel slope, Strahler stream order, pre-settlement vegetation class, surficial geology, and current land cover category within a 30-m buffer on either side of each flowline feature.