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.
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2. Domestic_Wtr
2005. Napa County Conservation Department. Napa County's Domestic Water Supply Drainages pertaining to Napa County Ordinance 1219. Boundaries taken from the Drainages layer. Napa County (Calif.). County Of Napa.
3. drainages
2005. Jones Stokes. The Napa County Watersheds were generated from two elevation datasets. The Napa River Watershed was generated from LIDAR data processed by NCALM a... Napa County (Calif.). County Of Napa.
2008. Federal Emergency Management Agency (FEMA). The Digital Flood Insurance Rate Map (DFIRM) Database depicts flood risk information and supporting data used to develop the risk data. The primary... Napa County (Calif.). County Of Napa.
5. major basins
2005. Jones Stokes. The Napa County Watersheds were generated from two elevation datasets. The Napa River Watershed was generated from LIDAR data processed by NCALM a... Napa County (Calif.). County Of Napa.
2005. County of Napa ITS Department. Major named water bodies within Napa County. Napa County (Calif.). County Of Napa.
2005. VESTRA Resources Inc. Boundary of the Napa County Flood Control District. Napa County (Calif.). County Of Napa.
2010. Vestra Resources Inc. Redding CA. Sphere of Influence for the Napa County Flood Control and Water Conservation District. Napa County (Calif.). County Of Napa.
2002. Vestra Resources Inc. Redding, CA. Boundaries of the ten Water Districts in Napa County. Napa County (Calif.). County Of Napa.