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Archive: August, 2023
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    photos of lower granite during construction and present day overlaid with eachother

    The end of a long journey: a history of Lower Granite Lock and Dam

    It was early in the morning and a steam-powered paddleboat made its way up the lower Snake River, trimmed with colored flags. The date was June 19, 1975, and the mood was festive. The vessel was heading for Lower Granite Lock and Dam, whose pool had been raised just four months prior.
  • These staircases allow access to Lucky Peak’s piezometers, an essential component to dam safety at Lucky Peak Dam. A piezometer is a geotechnical instrument that measures changes of water level or water pressure beneath the surface. There are 25 piezometers specifically arranged at Lucky Peak Dam to gather risk assessment data for engineers. The piezometers extend to different lengths beneath the surface to measure water depth at specific locations.

    Piezometers: An essential component to dam safety

    Congress has invested $665,000 from the Bipartisan Infrastructure Law to install new prefabricated staircases for the safety of maintenance workers who use the staircases to inspect the condition of Luck Peak Dam.