Angus Anson Generating Station is a two-unit peaking facility, capable of firing on natural gas or oil.

The Anson station was formally established in 1994, when two peaking units were installed to provide additional generation to the Sioux Falls area. The site previously was home to the Pathfinder plant, which was originally built as a pilot nuclear plant - a facility that laid the groundwork for the company's successful nuclear operations at Monticello and Prairie Island. Pathfinder later was converted to an oil and gas-fired peaking facility, although it is no longer operating.