Advanced Air Quality Control Systems (AQCS) were installed in 2012 for $750 million on all four generating units.

In 2009, it was listed as the third largest generating station in Wisconsin with a net summer capacity of 1,135 MW.

[5] On November 6, 2020 - A plan was announced that includes the retirement of the 1,100-megawatt South Oak Creek coal plant in southeastern Wisconsin over the next five years.

[7] In 2005, two 615-megawatt coal-fueled units were constructed just north of the existing Oak Creek facility.

They had been preparing the structure for repairs when an unknown source ignited coal dust that had accumulated at the top of the silo.