Dog River pipeline replacement in Oregon improves water supply with new HDPE pipe
(UI) — The City of The Dalles has completed a major upgrade to its water supply system through the Dog River Pipeline Replacement Project.
The project replaced a deteriorating 20-inch wood stave pipe, installed in 1913, with a modern 30-inch high-density polyethylene (HDPE) pipeline. The new pipeline is designed to handle peak flows of 26.3 cubic feet per second, securing over half of the city’s annual water supply.
The original pipeline had been leaking more than a million gallons per day during peak spring runoff, threatening the city’s water reliability. The replacement provides a more resilient system capable of sustaining the city’s needs for years to come.
Jacobs, the engineering firm leading the project, provided environmental permitting services and conducted cultural resource investigations throughout the construction process. Their team worked on a fast-track schedule, ensuring the early procurement of 13,000 feet of HDPE pipe and fittings to meet the city’s tight timeline.
The upgrade allows the city to maximize its surface water rights and increase wintertime flows to the treatment plant. This improvement supports the city’s aquifer storage and recovery (ASR) plan, which stores treated water in the winter for use during the summer, ensuring a stable water supply year-round.
Recognized with the State Land Board’s Stream Award, the Dog River Pipeline Replacement sets a new standard for resilient infrastructure in fire-affected areas, while supporting the city’s long-term water management goals.
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