PIERRE, S.D. (KELO) — Montana-Dakota Utilities wants to charge more for electricity and natural gas and is asking the South Dakota Public Utilities Commission for approval. MDU has proposed rate increases of 17.3% for electricity and 11.2% for natural gas. The Bismarck, N.D.-based company says in the filings that the new rates will allow it … Continue reading MDU seeks higher electric, gas rates for SD customers