Update: Public Works Announces Niwot Road Median Closure Near Diagonal Highway (2026)
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.
Residents in the Lafayette area should note that service boundaries may differ from city limits. For properties in unincorporated Boulder County, contact Clerk & Recorder at (303) 441-1742 to verify eligibility and requirements.
The project includes improvements along Sunshine Canyon Drive between Lafayette and the intersection with Arapahoe Road. Construction is scheduled to begin in June 2026 with completion expected within 10 months.
Frequently Asked Questions
Affordable housing remains the top priority identified in the 2025 Community Survey. Boulder County’s Worthy Cause program has funded 1,767 affordable housing units since its inception, with 273 additional units in the development pipeline.
Public comment on this matter can be submitted through the Boulder County online portal, by email to Clerk & Recorder, or in person at the next Board of County Commissioners meeting. Written comments received by 5:00 PM the day before the hearing will be included in the public record.
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