 I'm Libby Pelletier in the News Center. Routine testing early this month has turned up larval stage zebra mussels in the Colorado River and Highline Canal near Clifton. Colorado Parks and Wildlife says so far no adult mussels have been found and both the river and canal are considered suspect for the presence of zebra mussels. Zebra mussels pose an extreme risk of ecological impacts to Colorado and a risk of infrastructure that pulls water from the Colorado River.