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Electricity Generation
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Electricity
Generation
Montana
Owned generation resources supplied approximately 60% of our retail load requirements in 2016.
Our remaining customer load requirements are met with market purchases from third parties and include resources from wind generation, gas-fired generation and qualifying facilities.
60% of our generation came from wind and water in 2016. Only 22% came from owned thermal resources and the remainder came from thermal (natural gas and coal) that is under contract.
In 2014, we completed the purchase of 10 hydroelectric generating facilities in Montana.
Our Dave Gates Generating Station at Mill Creek, a 150 MW natural gas fired facility, primarily provides regulation service for the transmission system.
South Dakota
Our South Dakota electric supply load requirements are primarily provided by three jointly owned coal-fired generating plants:
We also own several peaking/standby generating units located throughout our service territory including a 52 MW unit in Aberdeen, S.D. that was placed into service in 2014.
We purchased and placed into service in 2015 the 80 MW Beethoven Wind Project located near Tripp, S.D.
We use market purchases and peaking generation to provide peak supply in excess of our base-load capacity.
In 2016, 63% of the electricity utilized in South Dakota came from coal and 36% from owned and contracted wind projects.
Montana Hydro
Colstrip Unit Four
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