Summer jump start May 12, 2023 RWhitcomb-editor Photo by Willliam Morgan taken in Acushnet, Mass. The Long Plain Museum, in Acushnet, was built in 1875 as the Long Plain School House. The school closed in 1972, and the building was then reopened as a local history museum, now operated by the Acushnet Historical Society. The museum features four rooms focusing on the Acushnet whaling heritage, the blacksmith trade, period clothing and furniture, numerous other artifacts and a restored schoolroom.The Long Plain is a local outwash glacial deposit of sand and gravel.