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Hydrology
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Planning and Cadastral
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1. Napa County Flood Control District
2005. VESTRA Resources Inc. Boundary of the Napa County Flood Control District. Napa County (Calif.). County Of Napa.
2. Sphere of Influence for Napa County Flood Control District
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.
3. Subbasin Boundaries, California (8-digit HUC), 2012
2012. Wyoming Geographic Information Sciences Center. This polygon shapefile contains the 4th level, 8-digit hydrologic unit code (HUC) sub-basin boundaries for California. A hydrologic unit is a drain... Wyoming Geographic Information Sciences Center.
4. Watershed Boundaries, California (10-digit HUC), 2012-2013
2012. Wyoming Geographic Information Sciences Center. This polygon shapefile contains the 5th level, 10 digit hydrologic unit code (HUC) watershed boundaries in California. This layer consists of geore... Wyoming Geographic Information Sciences Center.