The Department of Conservation has confirmed invasive Zebra Mussels have been found at Smithville lake.

The conservation released the findings Friday.

Officials say three zebra mussel shells were found at metal gates that control water flow at the damn operated by the Corps of Engineers.

The mussels found vary in age, indicating a reproducing population. It’s still uncertain what impact the mussels may have on the lake.

Mussels sharp shells can be hazardous to swimmers, they can clog pipes and cut fishing line. They have caused billions in dollars in damage in the Great Lakes and Mississippi River system.

They stress cleaning your boat after leaving the lake to prevent the spread to other areas.