Mill Creek Station has 29 groundwater monitoring wells, 20 of which have been polluted above federal advisory levels based on samples collected between April 14, 2010 and September 10, 2019. Groundwater at this site contains unsafe levels of sulfate, molybdenum, boron, arsenic, lithium, cobalt, antimony, manganese, cadmium and thallium.
Site descriptionMill Creek Station is a 1,465-MW coal-fired power plant located near Louisville, Kentucky, along the Ohio River in Jefferson County. The station, owned by Louisville Gas and Electric Company, has been in operation since 1972 and operates four coal-fired units. Unit 1 is expected to be retired in 2024 and Unit 2 by 2028. 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.
You can find the industry-reported data here. For more information about the Mill Creek Station, see EIP's 2019 National Coal Ash Report.