Zebra mussels confirmed in 200 miles of Western Slope rivers, prompting containment efforts.

Colorado Parks and Wildlife has confirmed zebra mussels in the Colorado River from the Eagle River confluence to the Utah border, declaring it infested. Detections also occurred near Rifle and in Glenwood Canyon, with sampling across 200 miles of Western Slope rivers. Eradication is no longer feasible due to the mussels’ rapid reproduction, so efforts focus on containment. Officials stress cleaning, draining, and drying boats to prevent spread, while investigating potential sources, including small ponds in the Grand Valley. Sampling continues through Thanksgiving.