The Terryville Waterwheel is located in Terryville, a historic 19th-century manufacturing district of eastern Plymouth, and now the town's main commercial center. It is located on the north side of Main Street (United States Route 6) on the western bank of the swiftly flowing Pequabuck River. The wheel is built out of wood and iron, and is mounted in its original wheel well formed out of rubblestone capped in concrete. It is in diameter and wide, and is sheltered by a form-fit shelter erected in 1951. Most of the wheel's parts are pressure-treated wood, replacing original materials in a 1990-91 restoration. The axle of the wheel is cast iron, with a cast iron hub providing attachment mortises for the wheel's arms. The arms are fastened to the hub with metal bolts, and are cross braced with iron tie rods.
