- Associated Press - Thursday, June 2, 2016

PIERRE, S.D. (AP) - The state Game Fish & Parks Department says invasive zebra mussels have been found in McCook Lake.

Department officials say the mussels were initially discovered by members of the McCook Lake Association performing maintenance prior to Memorial Day Weekend.

Additional sampling efforts by GF&P; have confirmed adult zebra mussels exist in multiple areas throughout the lake.

Officials found zebra mussels present and reproducing in large numbers in Lewis and Clark Lake near Yankton in August 2015. The discovery prompted increased boat inspections and enforcement efforts.

Boaters should completely draining boats to ensure aquatic invasive species are not transferred to other waters. Anglers and boaters using zebra mussel-infested waters should clean their boats with 140 degree water and let them completely dry before launching elsewhere.

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