Low-head dams were frequently the creation of industry. They formed small reservoirs for water extraction and toxic byproduct dissipations. For example, low-head dams were created in the Mahoning River industrial corridor to support the steel mills of northeast Ohio. After the steel mill closures, the toxic sediments remained in the reservoirs behind these low-head dams. These are now being dredged, and the dams deconstructed. The Mahoning River is now being restored to environmental health led by the efforts of a regional governing council and a local environmental advocacy organization.