Montana-Dakota provides electric and natural gas service in the states of Montana, North Dakota, South Dakota and Wyoming. The tariffs governing service in each state are filed with and approved by the Public Service/Utilities Commissions in each of the respective states. Users of the electronic tariffs should note that such tariffs are not the official documents, and users assume responsibility for reliance upon tariffs in electronic format. If you have any questions regarding services provided by Montana-Dakota or the tariffs provided here request information online or call 1-800-MDU-FAST (1-800-638-3278)

The tariffs are in .PDF format and require Adobe Acrobat Reader for viewing. If you do not already have it, you can download Adobe Acrobat Reader free of charge now.