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Columbia River Basin Water Management

This is the home page for the Columbia Basin Water Management Division, Northwestern Division, U.S. Army Corps of Engineers. We are responsible for the Corps' river and reservoir regulation activities in the Columbia River Basin. Please click the icons on the map to learn more about the various projects in the Columbia Basin.

Columbia River

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Columbia River Basin News and Features

Pacific lamprey returns eclipsing other years
9/25/2023 UPDATED
*Our initial news release referenced adult Pacific Lamprey returns were 170 percent higher than the 10-year-average and then referenced the 10-year-average being 41,414 which is actually closer to 154...
Federal water managers announce public information sessions about post-September 2024 Columbia River Treaty operations
How the United States uses reservoir space in Canada changes on September 16, 2024, from the high degree of structure and control of flows coming across the border from Canada experienced over the...
Drastic difference between air and water temperature could kill
With the onset of record-breaking heat across much of the Pacific Northwest, it’s imperative that people wear life jackets while swimming, boating and fishing. While air temperatures may be high,...
Juvenile salmon benefit from spring spill
In April, the Northwestern Division, U.S. Army Corps of Engineers started spilling water on the Snake and Columbia rivers to help juvenile salmon migrate downstream. We met up with Julie Ammann,...