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$20.9 Million Ridenbaugh Dam Upgrade Begins in Boise

10/16/2025

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Story summary
  • Construction has started on a $20.9 million modernization project for the Ridenbaugh Diversion Dam in Boise, Idaho, with completion expected by 2027.
  • The project will enhance worker safety, reduce water loss, and automate water diversion processes, replacing the outdated manual system.
  • The dam, built in the 1930s, is nearing the end of its usable life, prompting the need for upgrades.
  • Funding is provided by the Idaho Water Resources Board and the Bureau of Reclamation.
  • Rising costs from local economic pressures, including projects by Micron and Meta, may affect the timeline and budget.