The sluice which powered the waterwheel and sluice keepers cottage still exist. The history of energy harvesting dates back to the windmill and the waterwheel. This corn mill had an external cast iron overshot waterwheel carried on a wooden axle. The sluice which powered the waterwheel and sluice keeper's cottage still exist. The brothers are millstones, driven by a waterwheel made of wood. The cast iron overshot waterwheel was by . The clock tower was driven by a rotating waterwheel and escapement mechanism. This was a saw mill powered by a breast shot waterwheel. The invention of the waterwheel, sawmill, and arch were by the Romans. The aqueduct begins at the waterwheel and flows behind it. Jacob Perkins was in charge of installing the first waterwheel, dam, flumes and raceway. It was not until 1929 that the last waterwheel was replaced by a water turbine. They later erected a 40' waterwheel and steam mill, along with several arrastras. It is a contraption similar to a waterwheel with spokes of a bicycle wheel. The DIY-community has used abandoned water mills to mount a waterwheel and electrical generating components.