MichiganDNRThis dataset at 1:24,000 scale is a greatly expanded version of the hydrologic units created in the mid-1970's by the U.S. Geological Survey under the sponsorship of the Water Resources Council. The WBD is a complete set of hydrologic units from new watershed and subwatesheds less than 10,000 acres to entire river systems draining large hydrologic unit regions, all attributed by a standard nomenclature.ArcGIS DynamicMapLayerhttps://hub.arcgis.com/datasets/a16d7308dc8d401783eb87f3c612cb6e_21engUM Matthaei Botanical Gardens and Nichols ArboretumPublicWatershed Boundary - 8 Digit [Michigan]Web servicesMichiganLast Modified: 2022-08-16