CDOT, contractor complete safety & drainage improvements on CO 145 & US 550 ahead of schedule

Travel Advisory

October 9, 2020 - Southwestern Colorado

CO 145 project image

CO 145 Improvements

A new crib wall system and drainage on US Highway 550 south of Ouray completed the multi-site project.

MONTEZUMA, DOLORES, OURAY COUNTIES -The Colorado Department of Transportation and contractor Oldcastle SW Group, Inc., have completed the project to repair and make safety improvements on Colorado Highway 145 and US Highway 550 in Dolores, Montezuma and Ouray counties. The project, completed ahead of schedule and under budget, has preserved the structural integrity of the highways with the repairs and reconstruction of retaining systems at the roadways’ shoulder edges. The work zones and work items included: 


  • Colorado Highway 145, mile point (MP) 24.5, about 12 miles north of Dolores in Montezuma County

    • Work involved a ‘deep patch’ repair of the roadway and installation of a new rock buttress that provides slope stability underneath the roadway; guardrail replacement


  • CO 145, MP 49, about three miles north of Rico in Dolores County

    • Work involved removing the existing retaining wall material below the edge of the roadway; installing micro-piling and concrete pile caps with new backfill material to secure the slope; follow-up highway surface repair; guardrail replacement


  • US 550, MP 90, two miles south of Ouray in Ouray County 

    • Work involved retaining wall removal and replacement of two failing roadway sections with a crib wall system; follow-up highway surface repair and installation of new inlet and drainage culvert

CO 145 finished roadway

The project was contracted to Oldcastle SW Group for $1.5 million. Several photos are available on the project website, below.


Project hotline: 970-519-1759 

Project email:

Project website: