The Reservoir on Powder House Hill was built in the 1850s on the site of the old powder house behind the present day Town Hall. Water was stored inside the 18 feet deep/18 foot wide structure. A large windmill behind the structure carried water into the reservoir where it was fed by gravity to the nearby Union Straw Works and principal houses in the area before the advent of town water. The Foxborough Historical Society took ownership of the structure in hopes of adding a large wing to create a town museum but moisture problems could not be overcome and the plan was abandoned. The windmill has been removed, but the reservoir stands today.