IDAHO SPRING - In the mountains just east of Idaho Springs, right next to the passing traffic on Interstate 70, two strange structures have be set up.
The soaring steel skeletons are at the entrance of the Twin Tunnels. Inside, Project Director Matt Hogan and other workers have nearly finished all the blasting.
"There were around 70 to 75 blasts," Hogan said.
Crews are now busy drilling and laying down concrete as they expand the two lane tunnel into three lanes.
"We wanted to increase the size of the tunnel and hopefully improve mobility through the corridor by doing so," Hogan said.
Workers have spent weeks forging the super structure of the tunnel, the odd structures you can now see outside will be used as part of the inside lining.
"That shape you see today is the exact shape of the final lining when it's said and done," Hogan said.
The massive structure is actually made up of hundreds of different sections, and each one has to be put together specifically like a Lego set.
"It's exactly like that, very specific pieces only with very specific directions for a pretty large Lego set," Hogan said.
A giant Lego set that stands three stories tall and when finished will have to slowly be pushed inside the tunnel on rails. The structures will then be filled with several feet of concrete, making up the inside lining.
Work is still on schedule and the new three lane tunnel should be ready for drivers by the end of the year.
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