The Big Obstacle In August 1865 early snows defeated the Central Pacific's initial attempt to begin work on Tunnel No. 6, the Summit Tunnel. The grand engineering feat of the Sierra Nevada would ...

Yet somehow the Colorado Department of Transportation has been working to help folks move from Clear Creek County to Summit County and back through the Eisenhower-Johnson Memorial Tunnel for more than ...

They were losing hope that their rails would extend from the east portal of the Summit Tunnel to the Truckee River by year's end. Tunneling efforts continued in earnest, but the company was ...

The project envisions a 17-kilometer (over 10-mile) underground tunnel with 11 stations ... plans for a Dubai Loop in a video call at the summit on Thursday, describing it as a “wormhole ...