Mill Creek Station

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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 description

Mill 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.

Monitoring Wells Wells reporting one or more exceedances for at least one pollutant.
20 / 29
Wells not shown Locations for the following wells are unavailable:

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No exceedances
One or more exeedances
No data available
Other designation
Well "halo" size corresponds to mean concentration. Please note that some wells may not be visible on the map due to overlapping locations.
Pollutants monitored and above guidelines
Tip: Click on a contaminant to view wells that have recorded exceedances. Click again to remove the filter. antimony arsenic boron cadmium cobalt lithium manganese molybdenum sulfate thallium
Pollutants monitored and below guidelines
barium beryllium chromium copper fluoride lead mercury nickel radium selenium silver
Pollutants not monitored
ammonia, cyanide, gross alpha particle, gross beta particle, hexavalent chromium, nitrate, nitrite, strontium, tritium, uranium

Facility last updated on Tuesday, October 18, 2022 04:50:04 PM EDT