Public Works Announces Niwot Road Median Closure Near Diagonal Highway Near Niwot

Public Works Announces Niwot Road Median Closure Near Diagonal Highway Near Niwot

Boulder County Public Works announces a temporary median closure on Niwot Road near the CO-119 Diagonal Highway intersection for utility infrastructure improvements. The closure will affect left turns from Niwot Road onto the Diagonal Highway for approximately six weeks. A signed detour route will be in place.

Colorado state law requires all counties to provide these services to eligible residents. Boulder County exceeds minimum state requirements by offering expanded hours, multilingual support, and online access. In 2026, the county received a state award for excellence in service delivery.

The project includes improvements along Coal Creek Canyon Road between Boulder and the intersection with Left Hand Canyon Drive. Construction is scheduled to begin in May 2026 with completion expected within 6 months.

Frequently Asked Questions

The Mud Lake open space property encompasses 1,826 acres and features 15 miles of multi-use trails. Seasonal wildlife closures may apply from December 15 through July 15 to protect nesting raptors and elk calving areas.

Environmental review of the project area near Coal Creek Canyon Road found 10 sensitive species and 2 wetland areas requiring mitigation. The Human Services worked with Colorado Parks and Wildlife to develop a habitat conservation plan.