March 28, 2019
163-mile Big Stone South to Ellendale Transmission Line energized
On February 5 crews from co-owners Otter Tail Power Company and Montana-Dakota Utilities, Co., energized the 163-mile, 345-kV Big Stone South-Ellendale (BSSE) Transmission Line after eight years of planning and three years of construction.
The $215 million line extends from the Big Stone South Substation near Big Stone City, South Dakota, to the Ellendale Substation near Ellendale, North Dakota.