Black Dog Generating Station (Burnsville, Minnesota)

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Black Dog is a coal- and gas-fired generating station, located on the Minnesota River just south of the Twin Cities.

The original Unit 1 boiler/turbine and the Unit 2 boiler, installed in the 1950s and fired on coal, recently were replaced with a natural gas combined-cycle unit (Unit 5), which includes a natural gas-fired turbine-generator combined with a heat recovery steam generator. Exhaust heat from Unit 5 powers the Unit 2 steam turbine. The repowering project, completed in summer 2002, boosts output from the two original units by more than 100 megawatts, and results in greater operating efficiency and cleaner power production.

Units 3 and 4 are dual-fuel boilers with steam turbines that continue to utilize coal as the primary fuel. Natural gas is the backup or topping fuel used to obtain maximum generation for both units.

www.xcelenergy.com/About_Us/Our_Company/Power_Generatio...
Plant Information and Tour Requests — 1-800-895-4999
www.fws.gov/midwest/MinnesotaValley/blackdog.html
www.nature.org/wherewework/northamerica/states/minnesot...