MDU Replacing Natural Gas Pipelines in Mandan

May 19, 2025 — Montana-Dakota Utilities will replace existing natural gas main pipelines and service lines in a portion of Mandan over the next several months. The replacement project is an on-going integrity management process to ensure the safety and reliability of the natural gas system. Through an evaluation, Montana-Dakota identifies sections of pipe for replacement based on physical and operation & maintenance components.

The Mandan project is expected to begin on May 27 and will take approximately four to five months, depending on weather conditions and any other unanticipated delays. The work will require a short interruption of natural gas service for customers. A company representative will contact affected customers to schedule a brief shut off and then relight of appliances.

Please refer to Montana-Dakota’s website for a map that outlines the area where the replacement work will occur. Click here for construction updates.