Communiqués

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Those interested in water levels, Zosel Dam operations and other projects and initiatives by the International Osoyoos Lake Board of Control are invited to attend a public meeting in Osoyoos, British Columbia, on October 4, 2023. The event is from 6:30-8 p.m. (PDT) at the Sonora Community Centre...
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Communiqué
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The spring freshet in the Okanagan/Okanogan and Similkameen basins has come to an early end as snowpacks have been depleted and levels on both Okanagan and Osoyoos lakes have peaked and begun to decrease. Osoyoos Lake peaked at 912.10 feet (278.01 meters) on May 8 in response to runoff within the...
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Communiqué
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If you’re interested in activities by the International Osoyoos Lake Board of Control, it’s now easy to receive news releases in your email inbox. The Board has launched a new feature which enables people to sign up to receive periodic email notifications on news related to Board activities. The...
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Communiqué
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Climatological conditions within the Okanagan/Okanogan and Similkameen River basins varied during 2022, with the greatest impacts related to a cool spring leading to delayed snowmelt and a delayed freshest peak at Osoyoos Lake. While near-normal temperatures prevailed at the start of 2022...
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The level of Osoyoos Lake reached 913 feet (278.3 meters) on June 23 in response to runoff within the Okanagan/Okanogan and Similkameen basins during the spring freshet (Figure 1). At this elevation of Osoyoos Lake, some beaches along the shoreline are inundated and wind or boat-generated waves may...
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After slowly declining since late July following a dry summer, Osoyoos Lake level reached the targeted winter operational elevation of between 909.45 to 909.55 feet in early December according to the Washington State Department of Ecology, which owns and operates Zosel Dam. Lake level is anticipated...
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On November 15th, discharge of the Similkameen River began to increase rapidly. This was due in part to the landfall of a Category 5 atmospheric river causing heavy, sustained rainfall and rising temperatures resulting in additional runoff from snowmelt. A flood warning for the Similkameen River was...
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Osoyoos Lake level reached the summer target elevation of 911.70 feet in late May, then crested to 911.82 feet (277.923 m) on June 15, below the maximum allowable International Joint Commission (IJC) Order of Approval rule curve of 912.0 feet.
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Communiqué