Diversions will start at Roza Dam on Monday, March 16th.

Deliveries will begin a couple/few days later, starting with the upper end. Provided we don't have any unexpected problems.

Announcements and Important Notices

Roza 2026 start-up/new snow & misc. info

Roza Water Users- Overnight temps below freezing in the mountains at 3,000 feet elevation and below can help hold the snowpack. Click on this link for the daily Yakima Project report Hydromet Pacific Northwest Region…

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Roza March water supply forecast (44% supply) and drought variable info

Roza Water Users: The March water supply forecast is 44%. The low end forecast is 31% supply. The high end forecast is 68% supply. The next water supply forecast will be issued on April 9,…

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March 3rd Roza/water storage/snowpack update & WSDAg survey request

Roza Water Users- USBR’s hydrologists and our hydrologist tell us that Rimrock will still fill completely in 2026. The filling rate is tracked and managed daily very closely in Yakima, at the regional USBR office…

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