Oregon Waters Invaded: Invasive Mussel Found!

An invasive quagga mussel was discovered for the first time in Oregon on June 6, found dead near Prineville Reservoir. The Oregon Department of Fish and Wildlife (ODFW) is treating the finding with extreme seriousness while confirming the extent of the situation. Initial thorough testing of the waterway has not revealed any further signs of the invasive species beyond the single mussel. It remains unknown how the mussel arrived on the shore.

Quagga mussels present substantial environmental and economic risks to Oregon. They are capable of causing considerable damage by obstructing boat motors and water intake systems, competing with native species for food, and disrupting aquatic ecosystems. ODFW is continuing to monitor the area for any signs of an infestation. Recreational boats are a primary vector for the spread of these invasive mussels, underscoring the importance of boater compliance with inspection and cleaning protocols.

No plans are currently in place to close Prineville Reservoir, as inspections have shown no other invasive species. Boaters are reminded by ODFW to stop at mandatory check stations and to clean, drain, and dry their vessels after use. Suspicious mussel sightings can be reported to a dedicated hotline or online.