California Water Library
The North Lahontan region is located in the northeastern part of the state, encompassing part of the western Great Basin and the eastern slopes of the Cascade Range and the Sierra Nevada. It includes arid high deserts as well as the California portion of the Lake Tahoe Basin. The region covers 6,122 square miles and accounts for 4% of California’s total land area, but is sparsely populated, being home to only 0.3% of the state’s population.
U.S. Department of Agriculture (USDA) | December 9th, 1930
California Department of Water Resources (DWR) | December 1st, 1931
California Department of Water Resources (DWR) | July 15th, 1964
California Department of Water Resources (DWR) | August 15th, 1967
California Department of Water Resources (DWR) | June 15th, 1968
California Department of Water Resources (DWR) | August 15th, 1969
California Department of Water Resources (DWR) | June 15th, 1970
California Department of Water Resources (DWR) | August 15th, 1971
California Department of Water Resources (DWR) | September 15th, 1972