Published on October 10, 2025
HELENA, Mont. — Starting next week, the City will begin a multi-phase water system maintenance project to replace valve components on the water transmission main that connects the Ten-Mile Water Treatment Plant to the City of Helena’s reservoirs. Phase 1 of the Crosstown Connector Valve Replacement Project will include work at 13 locations on the west side of Helena (please see the map attached to this notice). The project will require limiting the water supply from the Ten Mile Water Treatment Plant and supplementing with water from the Missouri River Treatment Plant until the construction is complete. Whenever the Missouri River plant is turned on, it is common that some residents experience slight discoloration or odor in their water. The changes should not be of concern and are typically resolved quickly.
The project has been planned to minimize disruptions to the public; however residents may encounter temporary street closures and traffic control measures, and some properties may require temporary water service to be piped in from elsewhere in the system. City staff and the contractor team will be in contact with any property owners impacted by the work.
The project will be completed in four phases: Phase 1 (tentatively scheduled for Fall 2025), Phase 2 (tentatively scheduled for Spring 2026), Phase 3 (tentatively scheduled for Fall 2026), and Phase 4 (tentatively scheduled for Spring 2027). Construction will pause in the summer months due to increased water demands due to irrigations. The project is funded by the Drinking Water State Revolving Fund.
For additional information, please contact Utility Maintenance Staff at 406-547-8575 or check out the City’s Infrastructure Project page and map on the City’s website. A flyer with project information can be found here(PDF, 9MB) .
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