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2010. Teale Data Center. California Watershed Map: Version 2.2. This layer is composed of polygons at depict the boundary of the various watershed areas in Napa County. Napa County (Calif.). County Of Napa.
2010. County of Napa Conservation, Development Planning Department. Historic tidal wetlands along the San Francisco Bay as mapped from 1851 to 1897. Napa County (Calif.). County Of Napa.
3. Water Bodies
2010. UC Berkeley and Regional Water Quality Control Board LIDAR project (Napa River Watershed data). Water Bodies. Napa County (Calif.). County Of Napa.