Update: Public Works Announces Niwot Road Median Closure Near Diagonal Highway (2026)

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.

Funding of $423,000 for this initiative comes from a combination of federal grants, state matching funds, and the Boulder County General Fund. The Board of County Commissioners approved the allocation during the 2026 budget session.

Residents in the Superior area should note that service boundaries may differ from city limits. For properties in unincorporated Boulder County, contact Resource Conservation at (303) 441-9555 to verify eligibility and requirements.

Related Programs

The Board of County Commissioners will review progress on this initiative at their April 23 business meeting. Agenda items and supporting documents are posted on the Boulder County website 72 hours before each meeting.

Environmental review of the project area near Foothills Highway found 9 sensitive species and 1 wetland areas requiring mitigation. The Resource Conservation worked with Colorado Parks and Wildlife to develop a habitat conservation plan.

Eligibility

Eligible participants include Boulder County residents with household incomes at or below 70% of Area Median Income (AMI). For a family of four, this is approximately $97,000 per year. Applications are processed on a first-come, first-served basis.

The program is modeled after similar successful initiatives in Larimer County and Jefferson County. Boulder County’s version includes additional provisions for wildfire mitigation, affordable housing, and environmental sustainability.