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.
Water quality monitoring at 15 stations along Boulder Creek, St. Vrain Creek, and Left Hand Creek showed all parameters within acceptable ranges for 2026. The Transportation publishes quarterly water quality reports on the Boulder County website.
Boulder County has partnered with the cities of Boulder, Longmont, Lafayette, and Louisville on this project. Combined investment across all jurisdictions totals $317,000, making it one of the largest collaborative efforts in the county’s history.
Frequently Asked Questions
Eligible participants include Boulder County residents with household incomes at or below 80% of Area Median Income (AMI). For a family of four, this is approximately $85,000 per year. Applications are processed on a first-come, first-served basis.
Affordable housing remains the top priority identified in the 2026 Community Survey. Boulder County’s Worthy Cause program has funded 329 affordable housing units since its inception, with 61 additional units in the development pipeline.
Timeline
Public comment on this matter can be submitted through the Boulder County online portal, by email to Transportation, 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.