US 85 Widening Project in Douglas County from Sedalia to Louviers

Project Complete

The Colorado Department of Transportation, in partnership with Castle Rock Construction Company of Colorado LLC, announces the completion of the widening of US 85 to four lanes in Louviers to Sedalia in Douglas County.

Completed project components include additional lanes in both directions to improve safety as well as traffic congestion. A ten-foot-wide shoulder on either side as well as a large median to reduce crash risk and improve the safety of emergency stops. Further, the widening will reduce the danger where the road used to merge from two lanes to one. Approximately 618,000 cubic yards of dirt was removed from the project site, which equates to 190 filled olympic-sized swimming pools.

Now completed, the project will ease congestion, improve access to side streets and left turn lanes, improve drainage, enhance safety, keep wildlife access away, and added a new bridge.

Proposed Work Schedule

  • Work is scheduled to begin on July 6 and finish spring 2022.
  • Daytime work hours range from 7 a.m. to 7 p.m. Monday through Friday.

Traffic Impacts

  • Daytime work hours range from 7 a.m. to 7 p.m. Monday through Friday.
  • Vehicles are reduced to a single lane in both directions on US 85 through spring 2022. Motorists should expect flaggers on the roadway to help guide them through the construction zone or when work is near intersections.
  • The speed limit is reduced to 45 mph, and work zone fines are doubled.
  • Motorists should plan for possible long traffic delays during the days of Apr. 6-8 from 9 a.m. to 1 p.m. and are advised to avoid the area by using I-25 as an alternate route.
  • Night work hours for Apr. 13 and 14 are from 7 p.m. to 6 a.m. with road closure at Airport Road with detours in place, as shown on the map.

Project Facts

  • Cost: $23.7 million

  • Contractor: Castle Rock Construction Company of Colorado, LLC

  • Timeline: July 2020 - July 2022

  • Location: US-85 in Douglas County, beginning near Louviers and ends near Sedalia

US 85 Bridge Foundation

Photo taken by Cody Daigneault, CDOT Project Engineer of the bridge foundation installation.