CO 90 Bedrock/Dolores River Bridge Replacement

SH 90 Bedrock Bridge 2014

MONTROSE COUNTY – The Colorado Department of Transportation (CDOT) is removing the old Dolores River Bridge located on Colorado Highway (CO) 90 about four miles east of Bedrock and 15 miles east of the Utah-Colorado state line.

SEMA Construction of Denver was awarded the contract to dismantle the old truss bridge and replace it with a new pre-cast concrete structure. The new bridge will provide several improvements for the driving public including wider and higher clearance for oversized vehicles.

A SEMA crew started work in December of 2016 with construction expected to continue through the summer of 2017. 

TRAFFIC IMPACTS: Motorists will continue to use the temporary bridge installed just north of the old existing bridge. The temporary bridge allows for a detour of single-lane, alternating traffic under signal control. No over-sized/over-weight loads are allowed on the temporary bridge.

Work will take place Monday through Friday from sunup to sundown.

BACKGROUND: In the fall of 2014, a crack was discovered in a beam of the original steel through-truss bridge. The damage forced the closure of the old bridge. A temporary bridge was constructed to allow single-lane, alternating flow of traffic controlled by a light signal.  

The Dolores River Bridge, a steel Pennsylvania through-truss bridge, was built in 1952. In 2002, the bridge was listed on the National Register of Historic Places for its architectural significance. The Dolores River Bridge is one of 10 remaining intact steel through-truss bridges statewide. Because of its historical significance, there is potential to have the old bridge relocated for use as a pedestrian/bike path structure.

 STAY INFORMED: 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

Project Facts 

  • Contractor: SEMA Construction
  • Cost: $3.8 million
  • Public Information Line: 970-385-1423
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