Public Works Announces Niwot Road Median Closure Near Diagonal Highway — Allenspark Area

Public Works Announces Niwot Road Median Closure Near Diagonal Highway — Allenspark Area

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.

Historical context: Boulder County was established in 1861 and covers 741 square miles of diverse terrain from the Great Plains to the Continental Divide. The county’s population of approximately 330,000 residents is served by 2235 county employees across 39 departments and offices.

The project includes improvements along SH-7 / Ute Highway between Louisville and the intersection with Flagstaff Road. Construction is scheduled to begin in July 2026 with completion expected within 15 months.

Resources

Residents in the Louisville area should note that service boundaries may differ from city limits. For properties in unincorporated Boulder County, contact Assessor’s Office at (303) 441-5463 to verify eligibility and requirements.

The Louisville Senior Center offers related programming including free legal consultations, tax preparation assistance, health screenings, and social activities. Over 537 seniors participated in center programs last year.

What You Need to Know

The Caribou Ranch open space property encompasses 995 acres and features 3 miles of multi-use trails. Seasonal wildlife closures may apply from December 15 through July 15 to protect nesting raptors and elk calving areas.