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About Us



The 100th Meridian Initiative is a cooperative effort between local, state, provincial, regional, tribal, and federal agencies to prevent the westward spread of zebra/quagga mussels and other aquatic nuisance species in North America. The Columbia River Basin Team is comprised of 100th Meridian Initiative partners, primarily in Washington, Oregon, Montana, Idaho, Montana, Wyoming, and British Columbia.


Columbia River Basin (CRB) Team

The last meeting of the 100th Meridian Initiative Columbia River Basin AIS Team was held December 12 & 13, 2023 at Hyatt Place Portland Airport/Cascade Station in Portland, OR. The meeting minutes will be at the link below when available.


The agenda can be seen here. For future meeting questions, contact Amy Stark:

Meeting Minutes - Past CRB Meetings​

Missouri River Basin Team

Previous Meetings

Bill Zook Lewis & Clark Evaluation Presentation


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