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California Hydroelectric Statistics & Data
In 2007, hydro-produced electricity used by California totaled nearly 43,625 gigawatt-hours (GWh) or 14.5 percent of the state's total system power. In-state production accounted for 69.5% of all hydroelectricity, while imports from other states totaled 30.5%.
A total of 343 hydroelectric facilities are in California with an installed capacity of 13,057 megawatts (MW). Hydro facilities are broken down into two categories: larger than 30 MW capacity are called "large hydro"; smaller than 30 MW capacity is considered "small hydro" and are totalled into the renewable energy portfolio standards. The amount of hydroelectricity produced varies each year. It is largely dependent on rainfall.
One of those hydro facilities is the Edward Hyatt Power Plant on Oroville Dam, pictured on the right. According to the Calif. Dept. of Water Resources, the "Hyatt Power Plant was constructed in the bedrock below Lake Oroville. A cavern the size of two football fields was dug out to house the facility." Of the six units, three generate power, while the other three can either pump water for pumped water storage or generate power."
The Hyatt Power Plant is part of California's State Water Project, which is the largest state-built water and power development and conveyance system in the United States. It is the largest single power consumer in the state and the fourth largest energy producer. It makes a significant contribution to the state's electrical grid because the hydro power offers a flexible resource with rapid response to help stabilize the power grid.
|Fuel Type||In-State Generation||Northwest Imports||Southwest Imports||Total System Power||Percent of Total System Power|
Source: Total System Power
Total Hydroelectricity Production
(In Gigawatt-Hours; Includes Imports)