On this day Shasta Dam was letting out 70,000 cfs (cubic feet per second) of water from Shasta Lake. In the background you can see Mount Shasta at just over 14,000 feet elevation.
Shasta Dam is a concrete arch-gravity dam across the Sacramento River in Northern California in the United States. At 602 feet (183 m) high, it is the eighth-tallest dam in the United States. Located at the north end of the Sacramento Valley, Shasta Dam creates Shasta Lake for long-term water storage, flood control, hydroelectricity and protection against the intrusion of saline water. The largest reservoir in the state, Shasta Lake can hold about 4,500,000 acre feet.