Increased vigilance for invasive mussels has already resulted in five thwarted attempts to cross the Wyoming border this summer. Two of the five infested watercraft traveled through the check station in Beulah.

Wyoming Game & Fish stepped up its efforts to stop zebra and quagga mussels from reaching waters in this state after an infestation of the invasive creatures was reported at Pactola Reservoir around this time last year, just 30 miles from the Wyoming border.

This was the closest location in which the species has yet been found, which the department concluded was a significant inc...