• Lake Osoyoos

    Freshet Update: Okanagan/Okanogan and Similkameen Basins

    Spring freshet has largely concluded and the Osoyoos Lake level has reached its 2024 peak. Read the full news release.

  • Lake Osoyoos

    Freshet Update: Okanagan/Okanogan and Similkameen Basins

    Spring freshet has largely concluded and the Osoyoos Lake level has reached its 2024 peak. Read the full news release.

  • Oroville Washington view

    Save the Date - 2024 Public Meeting

    The next public meeting of the International Osoyoos Lake Board of Control will be held on Thursday, October 3, 2024, in Oroville, Washington, from 6:30-8 p.m. (PDT). Stay tuned for more information.

  • Oroville Washington view

    Save the Date - 2024 Public Meeting

    The next public meeting of the International Osoyoos Lake Board of Control will be held on Thursday, October 3, 2024, in Oroville, Washington, from 6:30-8 p.m. (PDT). Stay tuned for more information.

  • Zosel dam live camera - December 23rd, 2022

    Zosel Dam live camera

    View the latest timelapse footage from the Zosel Dam camera at Oroville, Washington

International Osoyoos Lake Board of Control

Map of Osoyoos Lake

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.

Supplementary Order of Approval 2013-01-29

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.

 

About the Board

Zosel Dam Emergency Contacts

Contact Zosel Dam Operations in case of an emergency