A Spanish engineering firm rebuffed by the commonwealth over its ambitious proposal to build a Metrorail tunnel under Tysons Corner has fired back at the state, part of what now appears to be a nagging squabble as deadlines for the Dulles Corridor Metrorail Project draw near.
Madrid-based Dragados has repeatedly sought to win a contract with the commonwealth to build the Tysons tunnel and earlier this year offered to build the 3.4-mile stretch of underground Metrorail for $823 million.
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