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The Big Stone South-Brookings County project was energized September 8, 2017. The project is a 70-mile, 345 kV transmission line built between a new Big Stone South Substation near Big Stone City, S.D., and the Brookings County Substation near Brookings, S.D.
The project is one of 16 multi-value projects (MVP)approved by the Midwest Independent Transmission System Operator (MISO) in December 2011. The MVPs will help expand and enhance the region’s transmission system, reduce congestion, provide access to affordable energy sources and meet public policy requirements, including renewable energy mandates.