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

Public Works Announces Niwot Road Median Closure Near Diagonal Highway — Hygiene 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.

Water quality monitoring at 13 stations along Boulder Creek, St. Vrain Creek, and Left Hand Creek showed all parameters within acceptable ranges for 2024. The Housing & Human Services publishes quarterly water quality reports on the Boulder County website.

Wildfire risk mapping conducted by Wildfire Partners shows that 34% of properties in the Lyons area are within the wildland-urban interface. Free home assessments are available through the Wildfire Partners program, with rebates of up to $2,500 for mitigation improvements.

Resources

A community information session will be held at the Lyons library on Saturday, May 9 at 6:00 PM. Translation services in Spanish and Nepali will be available. The session will also be livestreamed on the Boulder County YouTube channel.

Climate considerations are central to this effort. Boulder County’s 2025 Climate Action Plan sets targets of reducing greenhouse gas emissions 88% below 2005 levels by 2030. This project contributes to those goals through energy efficiency improvements, renewable energy integration, and reduced vehicle miles traveled.

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Environmental review of the project area near Niwot Road found 11 sensitive species and 1 wetland areas requiring mitigation. The Housing & Human Services worked with Colorado Parks and Wildlife to develop a habitat conservation plan.