The first invasive mussels have been found on a boat entering Idaho at a checkpoint on U.S. Highway 93 in Twin Falls County near the Nevada state line, the Times-News reports. The 20-foot pontoon boat, which was headed to Cascade from Lake Havasu, Nev., was impounded by authorities and decontaminated, a process that took an hour and a half and incurred no cost to the boat owner, a Donnelly resident. Last year, Idaho checkpoints conducted 18,450 boat inspections and found two confirmed cases of invasive quagga or zebra mussels, plus an additional unconfirmed report; last year's mussels were found at North Idaho checkpoints; click here for the full story, including video, from Times-News reporter Pat Marcantonio.