Gibson Generating Station has 81 groundwater monitoring wells, 75 of which have been polluted above federal advisory levels based on samples collected between May 06, 2010 and November 06, 2014. Groundwater at this site contains unsafe levels of manganese, boron, arsenic, molybdenum, sulfate, selenium, nitrate, barium, nickel and mercury.Site description
Duke Energy's Gibson Generating Station is located in northern Indiana along the Wabash River, southeast of Mount Carmel, Illinois. The 5-unit, 3,340 MW coal-fired power plant was built in 1955 and is Duke Energy's largest plant. The Station operates five unlined ash impoundments, a Type II restricted waste landfill, a closed landfill, and a 3,490-acre lake that supplies the plant's cooling water and collects excess water discharges. The lake is part of a designated wildlife area and was used for fishing until Duke Energy closed it in 2007 due to high levels of selenium found in fish.
Drinking water contamination from boron and manganese were documented in private residential wells in 2007 and 2008. This contamination led Duke Energy to supply bottled water to residents of Mt. Carmel, IL, whose water had been polluted above drinking water standards and health advisories.
The Gibson Generating Station is among the U.S. Environmental Protection Agency's list of proven damage cases, indicating that it has polluted groundwater or surface water at levels which threaten human health and the environment. For more information regarding the Gibson Generating Station, see EIP's 2010 report, Out of Control and 2011 report, America's Top Power Plant Toxic Air Polluters.