The upper river valley is now the site of Damflask reservoir, built in the 1870s, but not completed until 1896, due to problems with leakage. It covered the sites of Dam Flask Corn Mill, which was probably part of the complex mentioned in 1219, and Dam Flask Wheel, which was variously a cutlers' wheel, a paper mill, and a scythe and sickle manufactory, between 1750 and 1861. By 1864 it was probably a wire mill, as four wire-drawers were drowned there in the flood.