Construction is underway at the derelict Marshall Tavern, henceforth known as the Marshall Tavern Inn. The historic building has rotted away since it was closed in 1982, but owners Gary Dowd and Gerry Hardiman have started renovating the establishment. 

Plans call for six rooms and a 4,000-square-foot deck over the water that will hold a concession on the far side, a kayak launch, two bicycle racks, two benches and a 5-by-20-foot floating dock. The…