Red Mt. Pass Crib Wall Reconstruction to Involve Blasting

May 9, 2016 - Southwestern Colroado/CDOT Region 5 - Travelers can expect up to 30 minute delays

SAN JUAN COUNTY - The Colorado Department of Transportation (CDOT) has announced that the current reconstruction project of crib walls on US 550 Red Mt. Pass will involve some blasting starting this week.

TRAVEL AND ACCESS IMPACTS:  Beginning May 11, 2016 and continuing for 2 and a half weeks, travel delays during working hours will be approximately 30 minutes to accommodate blasting operations and cleanup.  Blasting is expected to take place from about 11 am to 2 pm. Travel will continue to be limited to single-lane, alternating traffic 24 hours a day, 7 days a week, controlled by flaggers or portable traffic signals.  Work hours are normally 8 am to 6 pm Monday through Friday and 8 am to 5 pm on Saturday.  During non-work hours, delays are approximately 6 minutes.

Once blasting work is complete, which is expected to be May 27, 2016, single-lane alternating traffic restrictions will remain in place but delays will be shortened to approximately 20 minutes during work hours and 6 minutes during non-work hours. 

Rock & Company of Brighton, CO, under contract with CDOT started the second season of work about a month ago in mid-April.  Work to be done includes rock excavation and blasting, retaining wall (or crib wall) construction, mesh wall installation, culvert installation, paving and restriping.  

Work done during the first season of construction in 2015 completed four crib (retaining) walls on the north side of Red Mt. Pass. This season’s 2016 work will finish the fifth wall, located at MM 79.5 to MM 79.4, just south of Red Mtn. Pass summit (and about 9 miles north of Silverton). The entire project is scheduled to be complete by August 31, 2016.

PROJECT INFORMATION:  For more information or to ask questions, please contact the contractor’s public information line at (970) 209-3332.

OTHER ROAD & PROJECT INFORMATION: 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