![Shasta Dam](http://upload.wikimedia.org/wikipedia/commons/thumb/b/b2/Shasta_dam_under_construction_new_edit.jpg/500px-Shasta_dam_under_construction_new_edit.jpg)
Shasta Dam, an arch dam across the Sacramento River at the north end of the Sacramento Valley, California, during its construction in June 1942. The dam mainly serves long-term water storage and flood control in its reservoir, Shasta Lake, and also generates hydroelectric power. At 602 ft (183 m) high, it is the ninth-tallest dam in the United States and forms the largest reservoir in California.