Nevada Power generates electricity at its own power plants in southern Nevada and imports electricity from out-of-state sources. Since 2006, Nevada Power Company has added about 1,800 megawatts of company-owned generation to its fleet. These newer, more efficient plants use less fuel and water and produce less emissions. The addition of these plants also has allowed older, less-efficient plants to be closed.

Of the electricity used by our customers -- a combination of company-owned power plants and power purchased from other providers -- about 70 percent comes from natural gas-fired generating units.

Most of the electricity the company imports from other providers is secured through short and long-term contracts. A small amount of imported power is purchased daily on the spot market.