Marion Power Plant has 9 groundwater monitoring wells, 1 of which have been polluted above federal advisory levels based on samples collected between March 24, 2010 and September 13, 2011. Groundwater at this site contains unsafe levels of boron and cadmium.Site description
Southern Illinois Power Cooperative's Marion Power Plant is a 430 MW power plant located in Williamson County, IL on Lake Egypt. The plant consists of 120 MW and 173 MW coal-fired boilers, and two 70 MW natural gas or oil combustion turbines. Coal fly ash, bottom ash, and flue gas desulfurization sludge have been placed in six unlined ponds, one unlined landfill, and one lined pond since 1963. Groundwater monitoring has been required near the landfill and ponds since 1994, and high concentrations of cadmium were first detected in 1997. Marion is among the sites on 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. For more information about groundwater at this plant, see EIP's 2010 report In Harm's Way.
For more information about plant coal ash impoundments, visit the Prairie Rivers Network's Coal Ash Map.