Nelson Dewey Generating Station has 8 groundwater monitoring wells, 4 of which have been polluted above federal advisory levels based on samples collected between December 09, 2015 and October 15, 2019. Groundwater at this site contains unsafe levels of boron, molybdenum, thallium, arsenic, cobalt and selenium.Site description
Nelson Dewey Generating Station was a 200 MW coal-fired station before it retired in December 2015. It was located along the Mississippi River in Cassville, Wisconsin. Its owner, Alliant Energy, settled air pollution violations with the EPA in 2013 by agreeing to spend $1.2 billion to clean up coal-fired power plants and shut down older plants. Nelson Dewey Generation Station was one of the plants that retired. The Slag Pond near the station is regulated under the CCR rule. You can find the industry-reported data here. For more information on the Nelson Dewey Generating Station, see EIP’s 2019 National Coal Ash Report.