From Cronkite News (Kianna Gardner) via the Arizona Daily Sun:
The adult quagga mussel finding [on March 3, 2013], coming less than a year after [veligers] were first spotted, marked the end of more than a decade of attempts to keep the invasive species from taking over Lake Powell and cued the beginning of a new fight.
Experts deem it impossible to entirely eradicate the mussels from Lake Powell, a tourist destination that spans Utah and Arizona. The mussels latch on to the walls of Glen Canyon Dam and the hundreds of boats skimming the lake’s waters. If the mussels could not be removed from the lake, the experts concluded, at least they might contain the threat to keep it from spreading to other waters.
Clumps of quagga mussels damage the dam’s water flow, undercut an ecosystem for other aquatic species, cling to boat engines and cost millions of dollars to handle.
“It was a huge responsibility and honor to try and protect this lake. It is still a huge responsibility and honor to contain the quagga mussels here,” said Colleen Allen. She holds a distinctive title as a leader in the quagga mussel incursion: aquatic invasive species coordinator for Glen Canyon National Recreation Area.
The quagga mussel, a freshwater mollusk that likely was unwittingly brought into Lake Powell by boat, have proven to be a small but mighty foe. Less than three years after finding that mussel, the invasion had spread throughout most of the 186 miles of Lake Powell. Today, quagga mussels can be found in every canyon crevice, Glen Canyon officials said.