via.kdvr.com
Planned blast’s massive rock slide — 20 times average — closes Boulder Canyon
BOULDER COUNTY, Colo. -- Colorado Highway 119 in Boulder Canyon will be closed for at least two days after a rockfall because of blasting on Wednesday, the Colorado Department of Transportation said. The blasting was part of the highway's flood construction project. It is being done to move the road farther onto bedrock so it will survive another major flood.