 They are the second mussel species to be found in the Colorado. The quagga mussel has established a population further downstream, including in Lakes Mead and Powell, causing millions of dollars in damage to dam infrastructure. Allegiant Air's longtime CEO, Maury Gallagher, will step down in September, Allegiant's parent company said Thursday, saying also that President Greg Anderson will be the new CEO, receiving a seat on the Allegiant Air Board of Directors. More of the day's news at KNPR.org. I'm Dave Becker.