US 36 Bridges at St. Vrain and Left Hand Creek

Paving set for Aug. 7-8, and 13-15

Travelers can expect single-lane alternating traffic and delays as crews complete the following work:

  • On Tuesday, Aug. 7 and Wednesday, Aug. 8, crews will pave the bridge at US 36 and CO 66.
  • From Monday, Aug. 13 through Wednesday, Aug. 15, crews will pave US 36 at Left Hand Creek.

Alternate routes are recommended. If possible, plan your travel through this area during off hours to minimize the impacts of these temporary holds.

Project Facts

  • Budget: $10 million to $20 million
  • Contractor: American Civil Constructors
July 18, 2018
  • On July 19, crews opened the new bridge over Left Hand Creek to all traffic. Note that access to Middle Fork Road will now return to its original, pre-construction configuration.
  • Crews are importing soil embankment to raise the grade.
  • Crews are removing and restoring the detour, and restoring the channel along the creek.
  • In late July, expect single-lane closures at the bridge at CO 66 and US 36, with both directions of traffic in a head-to-head configuration, as crews mill and pave.

Traffic Impacts

  • Normal work hours: 8:30 a.m. – 3:30 p.m. Monday through Friday
  • Haul trucks will be entering/exiting the work zone and will prompt short traffic holds, if any.

Damage Overview

This section of US 36 is one of the main corridors providing access between Estes Park and Boulder crossing both the St. Vrain Creek and Left Hand Creek. Floodwaters caused extensive damage to these channels as well as the structures along US 36. Damage included large amounts of debris an sediment deposit, erosion of the roadway embankment, overtopping of the roadway, scour damage of the bridge piers and abutments, and exposing underground utilities. 



One of the goals in the repair process is to introduce certain betterments 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. The permanent repair phase will allow for the betterment of drainage facilities and erosion protection areas throughout the corridor that can handle the high flows from large storm events and protect facilities from potential damage in the future.

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