A release said a Minneapolis Park and Recreation Board watercraft inspector contacted the DNR after finding two juvenile zebra mussels on a sailboat being removed from the lake for the season.

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Zebra mussels were confirmed in Lake Harriet, immediately downstream of Bde Maka Ska, in September of last year.

The release said the lake is being inspected and staff are using "cutting edge eDNA sampling" to determine the extent and distribution of the infestation.

KSTP

Because the sailboat had been moored in the lake for an extended period of time, and the young zebra mussels are indicative of in-lake reproduction, it is believed treatment would likely not be immediately effective. The MPRB is inspecting all sailboats being removed from the lake.

As of now, zebra mussels have not been reported on any additional boats, the release said.