Aug. 5 (Bloomberg) -- Valero Energy Corp., the largest U.S. refiner, said its Texas refineries in Texas City, Houston and Port Arthur are returning to regular rates after their output was reduced because of Tropical Storm Edouard.

The three refineries are ``transitioning back to planned rates,'' spokeswoman Teri Levy said today in an e-mailed statement. Levy said she didn't know when the plants would return to capacity though ``the storm has had no material impact on production.''

The company has 16 refineries from Quebec to Aruba, most along the U.S. Gulf Coast.

The Texas City refinery can process about 199,500 barrels a day of crude oil. The Houston refinery can process about 83,000 barrels of oil.

The Port Arthur refinery is capable of processing 325,000 barrels of crude a day, according to the U.S. Energy Department. The plant had ``some minor power disruptions'' because of the storm, according to Levy.

To contact the reporter on this story: Aaron Clark in New York at aclark27@bloomberg.net

Last Updated: August 5, 2008 15:57 EDT