(Courtesy photo by David Rankin, National Park Service) Dropping water levels at Lake Powell expose invasive quagga mussels clinging to rocks, like this spot offering a view of Lone Rock. Powell's quagga infestation is raising concerns that the proposed Lake Powell pipeline could transport the nonnative mollusk across southern Utah.
Brian Maffly has worked for The Tribune off and on since 1994. Maffly roams Utah, covering public land and environment.