GROTON, Conn. — Electric Boat has won a $25.7 million contract to perform maintenance work on the USS Providence.

The work on the Los Angeles-class attack submarine was originally expected to be done at Portsmouth Naval Shipyard in Maine. But it was moved to Groton’s Electric Boat following the cancellation of repair work planned for the fire-damaged USS Miami.

Electric Boat says that, at its peak, the contract for the maintenance and modernization of the Providence will involve up to 300 employees. The work is expected to be completed by April 2014.

U.S. Rep. Joe Courtney said projects like maintenance on the Providence are crucial to keeping the company’s workforce on the job and protecting the industrial base for submarine force.