1. Colorado Watershed Boundary Dataset (WBD) Hydrologic Unit 12
U.S. Geological Survey, U.S. Department of Agriculture - Natural Resource Conservation Service, and U.S. Environmental Protection Agency. The Watershed Boundary Dataset (WBD) is a comprehensive aggregated collection of hydrologic unit data consistent with the national criteria for del... U.S. Geological Survey (USGS),U.S. Department of Agriculture - Natural Resource Conservation Service (NRCS),U.S. Environmental Protection Agency (EPA),Other Federal, State, and local partners (see dataset specific metadata for details http://nhd.usgs.gov/wbd_metadata.html).