CLEAR CREEK COUNTY, Colo. - You can see the explosion set off to expand the westbound Twin Tunnels near Idaho Springs - from the crew's perspective - in a video from the Colorado Department of Transportation.
CDOT posted the video of Monday's blast on YouTube.
Crews are blasting into the rock to create room for a third lane for westbound I-70. However, CDOT is not yet actually adding a third westbound lane. The project is just creating the room for it.
Eastbound I-70 was expanded last year and that third lane is open.