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2013. California. Department of Water Resources. This line shapefile represents groundwater elevation in California for spring 2013. This layer is a smoothed approximation of the groundwater level... California. Department of Water Resources.
2014. California. Department of Water Resources. This line shapefile represents groundwater elevation in California for spring 2014. This layer is a smoothed approximation of the groundwater level... California. Department of Water Resources.
2016. California. Department of Water Resources. This line shapefile represents groundwater elevation in California for spring 2016. This layer is a smoothed approximation of the groundwater level... California. Department of Water Resources.