April 29, 2004

NEW ORLEANS - Dominion Exploration & Production, Inc., a wholly owned subsidiary of Dominion (NYSE:D), announces the discovery of natural gas at the San Jacinto prospect. The discovery is situated in Desoto Canyon block 618, about 100 miles from Louisiana in the eastern Gulf of Mexico. Dominion owns 53 percent of the prospect and is the operator. Spinnaker Exploration Company (27 percent working interest) and Kerr-McGee Corp. (20 percent working interest) are partners.

The San Jacinto prospect was drilled to a total measured depth of 15,829 feet and encountered approximately 100 net feet of natural gas pay in multiple reservoir sands. The well is being cased to total depth and temporarily abandoned for future use as a producible well.

The discovery is Dominion's second in the eastern Gulf of Mexico area, only six miles from the recently announced Spiderman/Amazon discovery in which Dominion E&P has a 37 percent working interest. Development alternatives for the Spiderman/Amazon discovery are under evaluation and will now include San Jacinto. Anadarko Petroleum Corporation is the operator of Spiderman/Amazon.

Dominion is one of the nation's largest producers of energy, with a portfolio consisting of more than 24,000 megawatts of generation, 6.4 trillion cubic feet equivalent of natural gas reserves, 7,900 miles of natural gas transmission pipeline and more than 960 billion cubic feet of storage capacity. Dominion is one of the largest independent natural gas and oil exploration and production companies in North America with daily production of nearly 1.3 billion cubic feet of natural gas equivalent. Dominion operates in several major producing basins in the lower 48 states, plus the outer continental shelf, deepwater areas of the Gulf of Mexico, and western Canada. Dominion also serves 5.3 million retail energy customers in nine states. Additional information about Dominion is available on the Internet at www.dom.com.

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