Construction work has begun on Dominion Energy’s controversial Cove Point liquefied natural gas export facility in Lusby, the company announced Thursday. “This is a historic event for Dominion, Maryland and the nation,” said Diane Leopold, president of Dominion Energy. “The Cove Point LNG export project will help meet the world’s need to move toward cleaner fuels. At the same time, it will provide significant economic benefits in terms of thousands of construction jobs, hundreds of millions of dollars in new tax revenues over the life of the facility and an outlet for some of the nation’s surplus natural gas supplies.” Dominion estimates the project will cost $3.4 billion to $3.8 billion and will create 75 permanent jobs. Environmental groups have tried to stop the project, being built on the site of Dominion’s LNG import facility on the Chesapeake Bay, raising concerns about increased greenhouse gas emissions related to LNG.