Prairie State Energy Campus is a 1,600 megawatt base load, coal-fired, electrical power station and coal mine near Marissa, Illinois, southeast of St. Louis, Missouri.

[7] The project's Lively Grove underground mine was constructed to produce 6 million tons of high sulfur coal per year.

[2] Noting that projected emissions nevertheless include 25,000 tons of soot and smog-forming pollutants yearly, the Sierra Club and other organizations unsuccessfully sued to stop the EPA granting an air permit.

"[5] The company projected a 15% reduction in carbon dioxide (CO2) pollution compared with other coal-fired power plants based on its use of efficient supercritical steam generators and no emissions from transporting coal.

The limit of 1000 lbs CO2 emissions per megawatt-hour electricity would require future coal-powered generating stations to capture approximately half of their CO2 output.

[22] In a bid to exit its share of the Prairie State project, the City of Hermann, MO filed a lawsuit in March, 2015 against the Missouri Joint Municipal Electric Utility Commission and the Missouri Public Energy Pool, claiming that its share of $1.5 billion in debt issued to support Prairie State imposed an unconstitutionally high level of debt on the city.