NEW YORK - Calpine Corp shut the 724-megawatt Pastoria natural gas-fired power station in California for planned reasons by Sunday afternoon, the California Independent System Operator said in a report.

The 724-MW Pastoria combined cycle station is located in Lebec in Kern County about 30 miles (48 km) south of Bakersfield, California, on property leased from Tejon Ranch Corp.

There are three 156-MW combustion turbines at the station and two heat recovery steam turbines rated at 169 MW and 87 MW.

Calpine has said it planned to add a 160-MW, gas-fired combustion turbine at Pastoria at a cost of between $100 million and $200 million. If built, the new unit could enter service in 2011.

One MW powers about 700 homes in California.

Calpine, of San Jose, California, owns and operates nearly 24,000 MW of generating capacity in operation and under construction and markets energy commodities in North America. (Reporting by Scott DiSavino; Editing by Lisa Shumaker)