States, Tribe Call For Superfund Designation At Bonneville Dam Island; Say Contamination Poses Threat To Human Health, Environment

Pollution levels at Bradford Island, located between Bonneville Dam powerhouses on the Columbia River, have risen since a 2008 determination the island did not qualify as a superfund site, and are now exceeding that threshold level, according to an Oct. 10 letter by states and the Yakama Nation.