In this May 21, 2014 photo, Yenter Drilling and Blasting use explosives to break up a hillside into transportable and useful boulders, during a road-building operation on Highway 36 between Lyons at Estes Park, Colorado. The goal of the project is to move the road further from the adjacent river, which undermined the road heavily during floods the previous fall, in hopes of preventing such destructive flooding in the future. (AP Photo/Brennan Linsley)
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