Niagara Mohawk Power Corporation Declares Preferred Stock Dividends

Niagara Mohawk Power Corp., an indirect subsidiary of National Grid USA (“National Grid”), announced that its Board of Directors has declared dividends at the following rates for all outstanding series of its preferred stock. .85% on the $100 par value, 3.40% Series; .90% on the $100 par value, 3.60% Series; .975% on the $100 par value, 3.90% Series. Preferred stock dividends are payable on January 3, 2012, to holders of record on December 6, 2011; ex-dividend date December 2, 2011. The Company, doing business as National Grid, provides electricity service to approximately 1.6 million customers and natural gas service to approximately 565,000 customers in upstate New York. The Company is based in Syracuse, N.Y.