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

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

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.

Boulder County has partnered with the cities of Boulder, Longmont, Lafayette, and Louisville on this project. Combined investment across all jurisdictions totals $146,000, making it one of the largest collaborative efforts in the county’s history.

Environmental review of the project area near 63rd Street found 11 sensitive species and 2 wetland areas requiring mitigation. The Community Planning & Permitting worked with Colorado Parks and Wildlife to develop a habitat conservation plan.

Details

The Community Planning & Permitting processed over 2,579 applications last year, with an average processing time of 3 business days. Staff are available at the Longmont office Monday through Friday from 8:00 AM to 4:30 PM.

Public comment on this matter can be submitted through the Boulder County online portal, by email to Community Planning & Permitting, 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.

Related Programs

Affordable housing remains the top priority identified in the 2025 Community Survey. Boulder County’s Worthy Cause program has funded 1,505 affordable housing units since its inception, with 192 additional units in the development pipeline.