Colorado River snaking through Grand Canyon most endangered US waterway – report

The Colorado River seen from Grand Canyon national park. Photograph: Ken Neubecker/Courtesy of American Rivers

A 277-mile stretch of the Colorado River that snakes through the iconic Grand Canyon is America’s most endangered waterway, a new report has found.

The unique ecosystem and cultural heritage of the Grand Canyon is on the brink of collapse due to prolonged drought, rising temperatures and outdated river management, according to American Rivers, the conservation group that compiles the annual endangered list.