US 6 & US 385 Bridge Replacements

About the Project

The Colorado Department of Transportation and contracting partner, WW Clyde, began replacing five bridge structures located on US 6 and US 385 in March 2025. The outdated bridges that will be replaced are located on US 6 and US 385, near Holyoke, in Phillips County, 13 miles west of the Colorado-Nebraska state line.

The updated structures will have a lifespan of up to 100 years which will minimize the need for frequent maintenance and repairs. By replacing aging bridges, this project will enhance safety for Colorado’s traveling public and address the challenges posed by deteriorating infrastructure, including bridges that may no longer meet modern safety standards.

The US 6 and US 385 Bridge Replacement Project is anticipated to be completed in October 2026.

Work Completed in 2025

During the 2025 construction season, crews constructed three shoo-fly detours to temporarily divert traffic while the existing bridges were demolished and new structures were built. In addition, a new culvert was installed at the bridge north of Holyoke on US 385 at Mile Point 291 to improve water flow.

The three bridge replacements that began during the 2025 season include:

• US 385 south of Colorado Highway 23, MP 279
• US 385 south of County Road 4, MP 291
• US 6 east of CR 37, MP 453

Work Planned for 2026

During this construction season, crews will complete the remaining work at the three bridges that began construction in 2025. This work includes culvert installation, paving, and removal of the shoo-fly detours.

Crews will also begin replacing bridge structures at the following locations:

• US 6 west of CR 41, MP 454
• US 6 west of CR 43, MP 455

This work will begin with constructing shoo-fly detours at both locations to allow traffic to bypass active work zones. The detour on US 6 west of CR 41 at MP 454 will reduce traffic to a single lane with alternating travel guided by a traffic signal. The detour on US 6 west of CR 43 at MP 455 will operate 24/7 and feature a two-lane traffic flow. The existing bridges will be demolished and replaced with new structures.

Project Benefits

• Updated structures will have a lifespan of up to 100 years, minimizing the need for frequent maintenance and repairs
• Replacing aging bridges will enhance safety for Colorado’s traveling public
• Addresses challenges posed by deteriorating infrastructure, including bridges that may no longer meet modern safety standards

 Work this Week & Lane Closures on US 6 & US 385

Project Facts

• Construction Cost: $20 Million
• Contractor: WW Clyde
• Timeline: March 2025 to October 2026
• Location: US 6 and US 385
  • Nearest Town/City: Holyoke
  • Mile Point(s): 
    • MP 453, 454 and 455 on US 6
    • MP 291 and 279 on US 385
  • County: Phillips