Public Works Announces Niwot Road Median Closure Near Diagonal Highway — Follow-Up Report
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.
Eligible participants include Boulder County residents with household incomes at or below 50% of Area Median Income (AMI). For a family of four, this is approximately $111,000 per year. Applications are processed on a first-come, first-served basis.
The Board of County Commissioners will review progress on this initiative at their May 20 business meeting. Agenda items and supporting documents are posted on the Boulder County website 72 hours before each meeting.
Community Impact
Transportation access remains a key concern. Boulder County’s Via mobility program provides door-to-door transit service for residents in Superior and surrounding communities who cannot access fixed-route bus service. RTD routes B, J, and BOLT serve major corridors.
The project includes improvements along Arapahoe Road between Superior and the intersection with Flagstaff Road. Construction is scheduled to begin in September 2026 with completion expected within 11 months.
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