US 34 Big Thompson Canyon

US 34 - Damage

Latest Updates

CDOT has selected Kiewit Infrastructure Co. to serve as the Construction Manager/General Contractor (CM/GC) for this project, and will be working with the contractor representatives throughout the summer to start developing design and construction plans.

CDOT is also in the process of gathering input from stakeholders along the US 34 corridor to consider during the design development process. If you were unable to attend any of our meetings along the corridor in May to offer any suggestions, comments or questions you might have about the permanent construction repairs, we encourage you to click on the email link to the right to contact the project team. At these meetings, we also provided various informational handouts. Click here to view the presentation and handouts distributed at these meetings. Click here to view the May 19 meeting at the Estes Park Town Hall. Click here for a list of frequently asked questions and the answers to these questions.

Damage Overview

This section US 34 winds its way through the Big Thompson Canyon, providing major access between Loveland, Lyons, and Estes Park.  During the flooding, watershed runoff combined with flows released from Lake Estes Dam and surges from debris dam breaches to produce huge flow surges that exceeded the 500–year flood event.  The canyon section sustained widespread, massive damage.  Major sections of roadway were washed away completely, along with access bridges and retaining walls. In the narrows, much of the roadway and grade were undermined, washing out the pavement from below and exposing the wall support structures.

Emergency (Temporary) Repairs

US 34 - Emergency RepairsTemporary repairs were completed and the highway was reopened to traffic in both directions on Thursday November 11, 2013.  CDOT and its contractors worked from both the east and west ends of the canyon to assess and repair the damage and restore local access as quickly as possible.  Emergency repairs were extensive and included removing debris, re-establishing shoulders and embankments, replacing damaged asphalt, filling washed out sections with concrete fill, repairing local access structures, and repairing damaged drainage structures.

Permanent (Long-Term) Repairs

Permanent repairs will include removing and replacing much of the temporary asphalt, embankment fill, and temporary channel protection; as well as re-vegetating, replacing guardrails, and repairing fencing.  Some of the roadway sections that were not destroyed, but experienced flood water overtopping the roadway, will be analyzed and possibly replaced.

Click here to see a brochure that further explains the permanent repair process.

Estimated Timeline

  • Est. Design Start:  Summer 2014
  • Est. Construction Start:  TBD

Estimated Budget

  • >$50 million


One of the goals in the repair process is to introduce certain betterments (improvements that go beyond bringing the roadway up to standard) to roadway facilities that were damaged and make them more resilient to similar storm events in the future.  Having analyzed the damage caused during the flood event, certain design elements will be incorporated in an effort to prevent or lessen the severe damage that significant flood events can cause.  During the permanent repair phase, several alternatives will be developed to ensure that the Big Thompson channel has increased capacity and the roadway has additional high water relief to handle large storm events.

Project Hotline

If you have questions or concerns, please send us an email at or leave a message on the project hotline at 720-263-1589. We will respond within 24 hours.

Media Contacts

Jared Fiel
CDOT Communications Office

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