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Archive: July, 2023
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  • July

    Inside Ice Harbor Lock and Dam's Powerhouse in which Units 1-3 will be replaced with improved fish passaged turbines.

    USACE Plans Fish Survival Testing this Fall on the Second Improved Fish Passage Turbine

    The U.S. Army Corps of Engineers Walla Walla District has started the installation process in Unit 1 for another adjustable blade turbine designed for improved fish passage. The Corps has been working diligently to decrease fish injury and improve survival rates through turbines designed for improved fish passage at Ice Harbor Lock and Dam.
  • Dworshak Dam changed many times during its design. The original plans in 1948 described that it would be 370 feet tall. Later plans increased the height to 570 feet, then 630 feet. When Dworshak Dam was constructed, its final height was 717 feet tall.

    Larger than life: A history of Dworshak Dam

    In May 1948, floodwaters on the Columbia River overtopped the cofferdam where construction was underway on McNary Lock and Dam. This flood, one of the largest on record, was one of many documented in the region since the mid-1880s. The propensity for flooding in the Northwest sparked much discussion about regional flood control.