- Shasta Dam - Shasta Lake CAShasta Dam is the keystone of the Central Valley Project, a complex of several dams, reservoirs and canals across Northern California. It is a high-arch concrete dam over 600 feet high and almost 3,500 feet wide at the top, situated in the former Iron Canyon. At the time it was built, it was the second largest dam in the world, after Grand Coulee on the Columbia River (another New Deal project), and it is still the 8th highest in the United States. It impounds the largest reservoir in California, with a capacity of 4.5 million acre-feet. Shasta Dam had been originally conceived...