Berkshire No. 7 is a wood and steel barge constructed in 1935. It is historically important as a transitional canal barge and as one of the few surviving wooden-hulled canal boats. It was used to transport bulk cargo, including shipping fertilizer, from Connecticut to Long Island Sound. It sank in 1974 along with the Elmer S. Dailey and the Priscilla Dailey. The sunken vessel has deteriorated to the point that a salvage operation could result in breaking it apart. The Berkshire No. 7 was added to the National Register of Historic Places on December 21, 1978.