Conseil de contrôle du lac Osoyoos
The International Osoyoos Lake Board of Control (Board) was established by Order of the International Joint Commission (IJC) dated 12 September 1946 to ensure the implementation of the provisions of that Order relative to the alteration and operation of Zosel Dam. Zosel Dam was built in 1927 on the Okanogan River 2.7 km (1.7 mi) below Osoyoos Lake by the Zosel Lumber Company to create a log storage pond.
On January 31, 2013, The International Joint Commission announced that it had issued a Supplementary Order of Approval renewing the State of Washington’s authority to operate Zosel Dam and making minor modifications in how water levels on Osoyoos Lake will be managed.
Please refer to the reports section of the website for more information on studies related to the Order renewal process and other documents of relevance to the Board of Control, including annual Board reports to the IJC. The records section of the Reports page contains records of past Board meetings and relevant IJC Orders of Approval for Osoyoos Lake.
June 5, 2020: Spring freshet update - Osoyoos Lake level is dropping!
Outflow at Okanagan Lake Dam was increased by 250 cfs (7.1 cms) on June 2 because Okanagan Lake was above full pool levels, but appears to be cresting (June 5 level is 1,123.97 ft. (342.587 m). The release from Okanagan Lake resulted in inflow of about 2,900 cfs (82.1 cms) into Osoyoos Lake by June 3. The Okanagan Lake release was delayed until after the backwater effect of the Similkameen River decreased and outflow from Osoyoos Lake increased. Zosel Dam will continue to maintain all flow control gates fully open during this time, until the lake level drops below the upper limit of the IJC rule curve for Osoyoos Lake (912 ft.).
Call for website photos!
The International Osoyoos Lake Board of Control is seeking digital photo submissions from members of the public for posting to this website. Specifically, we are accepting submissions of high quality scenic photos for use as home page sliders. Please see the attached submission criteria here and send us your best Osoyoos Lake pics!
Zosel Dam Emergency Contacts
Contact Zosel Dam Operations in case of an emergency