SD – Montana-Dakota Utilities NG-23-014Aug 28, 2023Rateacuity.comImportant Rate ChangesGas, SD Case: NG-23-014 Initial Filing Date: 8/15/2023 Summary: 15.9% Residential, 4.9% Firm General, 1.9% Small Interruptible, 6.1% Large Interruptible Effective Date: 9/1/2024 Status: Settled Type: Gas