Framingham Reservoir No. 3 Dam and Gatehouse, Framingham

The Framingham Reservoir No. 3 Dam and Gatehouse is a historic waterworks facility in Framingham, Massachusetts. The dam and gatehouse are located at the southeastern end of Framingham Reservoir No. 3, off Massachusetts Route 9. They were built 1876–78 as part of an expansion of the public water supply of the city of Boston. The dam is 2,280 feet long, and impounds an area of 253 acres in the Sudbury River watershed. The reservoir is the largest of the three Framingham reservoirs that were built at that time. The dam's core is constructed of granite rubble laid in cement. There is a granite-lined overfall area 100 feet long, which was originally topped by flashboards. At the end of the overfall area nearest Route 9 stands the gatehouse, a granite structure with a rectangular main block and a smaller wing. Both sections have a steeply pitched slate roof. The door is in a round-arch recess, and the building is capped by a cupola. It houses controls for two 4-foot mains connected to the Sudbury Aqueduct via the gatehouse at Reservoir No. 1. The water is directed either directly beyond the dam into reservoir 1 or through the 4-foot mains to the Sudbury Aqueduct gatehouse. ()