I-70 Resurfacing from Chief Hosa to Colfax

About the Project:

Interstate 70 resurfacing project from Chief Hosa (Exit 253) to Morrison (Exit 259) in Jefferson County. Work on this federally funded project is designed to improve safety, travel time reliability and mobility along this 10-mile stretch of the I-70 mountain corridor.

Work includes full width milling and overlay to restore the roadway for smoother driving conditions, replacing guardrail, repairing two bridge decks at the eastern end of the project, installing drainage improvements, and adding variable speed limit signs and message boards on eastbound I-70 from Genesee Park (Exit 254) to Colfax (Exit 262).

Project Benefits

  • Improve safety by replacing deteriorating pavement for a smoother driving experience, and installing new safety guardrail
  • Increase the lifespan of two bridge structures at Morrison (Exit 259) by repairing both bridge decks
  • Improve travel time reliability and mobility by Installing dynamic speed limit signs and message boards on eastbound I-70 from Genesee Park (Exit 254) to Colfax (Exit 262)

Work Schedule:

  • Work began in mid-August and is expected to last until late 2025
  • Project hours will be split between two shifts, from 7 p.m. to 5 a.m. Sunday to Thursday and 7 a.m. to 7 p.m. Monday to Friday
  • Hours will be adjusted during the winter months
  • CDOT anticipates full completion by late 2025

Traffic Impacts:

  • Motorists can expect overnight single and double lane closures in both directions of I-70 within the project limits from Sunday to Thursday, except on holidays
  • Intermittent overnight lane closures may also exist on the weekends
  • Reduced speeds, traffic shifts, and delays can be expected
  • Shoulder closures will be taken during daytime and overnight hours
  • A 12-foot width restriction will be in place
  • Signs and construction devices will be present to alert motorists to lane closures, traffic shifts and other work zone restrictions
  • Nearby impacts include the I-70 Floyd Hill project, with travel delays and lane closures from Beaver Brook (Exit 248) to Idaho Springs (Exit 241)
  • Refer to COtrip.org for real-time travel conditions and road closures

Work this Week & Lane Closures
I-70 Resurfacing Chief Hosa to Colfax

Project Facts

  • Construction Cost: $34.7 Million
  • Contractor: Martin Marietta
  • Timeline: August 2024 to November 2025
  • Location: I-70 from Chief Hosa (Exit 253) to US 6/Colfax (Exit 262)
    • Nearest Towns/Cities: Genesee and Golden
    • Mile Point(s): MP 252 to 262
    • County: Jefferson
I-70 Resurfacing from Chief Hosa to Colfax Project Map
I-70 Resurfacing from Chief Hosa to Colfax Project Location