Northwestern Energy has announced a significant merger with South Dakota's Black Hills Corp, leading MTN's John to examine ...

Rapid City, S.D.-based Black Hills Corp. and Sioux Falls, S.D.-based NorthWestern Energy Group Inc. will merge in an ...

Black Hills Energy has announced its merger with another Great Plains utility company in response to what it says is a growing energy demand in the region.

Utility company Black Hills said it would buy peer NorthWestern Energy for US$3.6 billion, creating a larger regulated ...