Mill Creek Station has 28 groundwater monitoring wells, 18 of which have been polluted above federal advisory levels based on samples collected between April 14, 2010 and August 09, 2017. Groundwater at this site contains unsafe levels of sulfate, boron, molybdenum, lithium, arsenic, antimony, manganese and cobalt.Site description
Mill Creek Station is a 1,472 MW coal-fired power plant located near Louisville, Kentucky, along the Ohio River. The station, owned by Louisville Gas and Electric Company, has been in operation since 1972 and operates four generating units. Coal ash produced by the station was historically treated at the Ash Treatment Basin (ATB) located on the north side of the facility. Use of this treatment impoundment is being discontinued in favor of dry material transfer to the state-permitted landfill located on the south side of the facility. Additional CCR units include the Clearwell, Dead Storage, (former) Emergency and (current) Construction Runoff Ponds, all located immediately south of the station interior. These impoundments were not used for CCR treatment, but may have historically, on occasion, received some quantity of coal ash. Mill Creek Station is among the U.S. Environmental Protection Agency's list of potential damage cases, indicating that it has potentially polluted groundwater or surface water at levels which threaten human health and the environment. You can find the industry-reported data here. For more information on the Mill Creek Station, see EIP’s 2019 National Coal Ash Report.