A rock slide on Interstate 70 near Glenwood Springs, Colo., punched holes in a bridge and dumped boulders the size of semitrucks on the highway, closing a 17-mile stretch of the road on the morning of March 8. There were no injuries. The slide occurred at midnight, just west of the Hanging Lake Tunnel in Glenwood Canyon, scattering approximately 20 boulders ranging in size from 3 ft to 10 ft in diameter. The largest is estimated to weigh about 66 tons. Colorado Dept. of Transportation geologists attributed the slide to a freeze-thaw effect caused by warm spring weather. CDOT implemented
The market is generally healthy and steadily growing, and margins are up for large specialty contractors. Further, advances in design tools and owner demand for collaboration are giving subcontractors a seat at the table early on in projects.