US 550 Red Mountain Pass Crib Wall Repairs Complete for Season 1

November 2, 2015 - Southwestern Colorado/CDOT Region 5 - Two sites complete; work at walls on south Red Mtn. (MP 79) resumes spring 2016

OURAY & SAN JUAN COUNTIES – The Colorado Department of Transportation and contractor Rock & Company have completed work for the season on US 550 Red Mountain Pass. The project, which began last July, is repairing/reconstructing five crib walls (retaining walls) below US 550 on Red Mountain Pass. The estimated total cost of this work (from design through construction) is $5.7 million. This is a two-season project that wrapped up early this year (the estimated season-one completion date was November 15, 2015), and will likely resume in mid-April and run through late June 2016, weather permitting.

The work consists of repairing and replacing crib walls at the following work sites:

  • Site 1 MM 79.5 to MM 79.4 – Just south of Red Mtn. Pass summit, 9 miles north of Silverton (RESUMES SPRING 2016)

Rock excavation and blasting, retaining wall construction (spring/summer 2016 impacts will be single-lane, alternating travel through the work zone)

  • Site 2 MM 88.5 to 88.6 – Approx. 4 miles south of Ouray near the snow shed (COMPLETE)

Excavation, culverts, retaining wall construction, minor paving

  • Site 3 MM 89.5 to MM 89.7 – Approx. 3 miles South of Ouray (COMPLETE)

Excavation and roadway stabilization that includes installation of a concrete “cap” or slab over the crib wall, drainage improvements and paving

This stretch of US 550 receives an average annual daily traffic count of 2,164 vehicles a day. The repair project will improve the safety and integrity of the highway by reinforcing these under-highway slope-side walls.

PROJECT INFORMATION:  For updates or to ask questions, the public may call the contractor’s project information line at (970) 209-3332. To sign up to receive project information and/or lane closure updates on state highways in the area of your choice, visit CDOT’s website at and choose the envelope icon at the bottom of the page. Or, to see CDOT’s lane closure reports for projects statewide, visit A brief on all upcoming projects (titled “Summer Construction Books” or soon “Traffic Watchers”) in CDOT’s Region 5 (SW Colorado) is posted here: