Zebra mussels continue to cause problems at Gavins Point Dam on the Missouri River.

Gavins Point Operations Manager Tom Curran says they have been fighting the infestation for several years….

Curran says they have been working to keep the Zebras out of their systems….

Curran say they continue to watch for more shells to show up in their internal waterworks….

The Zebra mussels attach to any underwater structure and rapidly multiply, causing issues for water intakes and other users.