Broadway at Lee Gulch Culvert Repair and Underpass

  • Project typeStorm Sewer Repair and Trail Improvements
  • Project statusConstruction
  • StartJuly 2025
  • CompletionSpring 2027
Area map of Lee Gulch at Broadway project

View project updates on the Cone Zone page

Project Update

Construction on the Broadway at Lee Gulch Culvert Repair and Underpass project will continue through spring 2027, but much of the remaining work will take place away from the roadway as crews complete trail connections, build a 10-foot flood wall, construct multiple retaining walls, install a pedestrian bridge and finish other site improvements. Motorists may still encounter occasional shoulder or lane closures, but the extended traffic shifts that were in place during the initial phase of construction have concluded.

The project reached an exciting milestone in summer 2026. In July, Broadway reopened to its normal two-lane configuration in each direction, marking the completion of the project’s most significant traffic impacts. Reopening all travel lanes improves traffic flow for drivers and represents an important step toward completing this essential infrastructure project.

Earlier in 2026, crews completed the first phase of construction, replacing a critical section of the aging storm sewer 30 feet beneath Broadway while maintaining traffic through the work zone.

Project Overview

The City of Littleton will replace a deteriorating 66” Corrugated Metal Pipe under Broadway to prevent road failure and flooding concerns. This culvert lies 30 feet below roadway surface and will require full replacement.

In 2024, crews determined an aging metal culvert beneath Broadway just north of Jamison Avenue was deteriorating. While city engineers and specialists with Mile High Flood District were able to temporarily stabilize the culvert, they also confirmed it must be fully replaced to ensure long-term safety and stability.

Replacing the culvert will require digging a 30-foot-deep trench to remove the old, damaged material and replace it with a more durable concrete pipe. This will require reducing traffic to one lane in each direction on Broadway for the duration of the project. While digging into a thoroughfare as heavily traveled as Broadway is rare, it also provides an opportunity to tackle a long-desired project: adding a pedestrian underpass beneath Broadway to connect the east and west sections of the Lee Gulch Trail, offering residents on the east side of Broadway safer access to the High Line Canal Trail on the west side. 

Currently, pedestrians and bicyclists traveling along the Lee Gulch Trail must detour 800 feet to cross Broadway at the high-traffic intersection with Jamison Avenue, and cross an access route to AdventHealth Littleton Hospital, risking conflicts with vehicles. A pedestrian underpass at this location has been identified for decades as a goal in numerous local planning efforts, including the public-led Broadway Corridor Study and the Littleton Linkages Trail Study, but was generally considered a longshot due to the challenges of major work beneath Broadway.

The project  includes:

  • Removal of approximately 260 linear feet of 66” corrugated metal pipe (CMP) and replace with 72” reinforced concrete pipe (RCP).
  • Install 10 ft x 12 ft pedestrian underpass under Broadway.
  • Trail improvements along Lee Gulch Trail

Lee Gulch at Broadway conceptual site plan

Contact Information

Sarah White, Project Manager
Water Resources Manager
swhite@littletonco.gov
303-795-3826

Location

7652 S Broadway, Littleton 80120  View Map

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