A new report on last year's massive landslide near the western Colorado town of Collbran says conditions remain that could prompt another disaster of comparable magnitude.
The 55-page Colorado Geological Survey study says risks remain specifically because of water that has collected in a depression near the slide's head, creating a "sag pond."
"A failure of the sag pond or the remaining rock slide could create a similar event to what happened," Karen Berry, the state geologist, told The Denver Post on Thursday.
The 2.8-mile long West Salt Creek landslide on the Grand Mesa killed three men on May 25, 2014, and was the longest such slide in Colorado history.

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