As of Friday, February 15, 2013
PORTLAND (AP) — Research-ers from Portland State University say the Columbia River has suitable conditions for invasive freshwater mussels to grow if they get a toehold. The researchers told the Northwest Power and Conservation Council Thursday that the water chemistry and temperatures are suitable for quagga and zebra mussels to grow if they get introduced. The mussels have wreaked havoc on docks, dams, and freshwater ecosystems from the Great Lakes to the Southwest, but so far not the Northwest.
Oregon and other states inspect boats crossing their borders to prevent an invasion.