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1. Groundwater Elevation Change, California, Spring 2006 to Spring 2016

2006. California. Department of Water Resources. This point shapefile represents changes in groundwater levels in California. These data represent groundwater changes between spring 2006 and sprin... California. Department of Water Resources.

2. Groundwater Elevation Change Contours, California, Spring 2006 to Spring 2016

2006. California. Department of Water Resources. This line shapefile represents changes in groundwater levels in California. These data represent groundwater changes between spring 2006 and spring... California. Department of Water Resources.

3. Major Dams: United States and Territories, 2006

2006. Rawson, Peg. This point shapefile depicts major dams in the United States, including Puerto Rico and the U.S. Virgin Islands. The map layer was created by extra... United States. Bureau of Transportation Statistics.