Ustick Road, Black Cat Road to Ten Mile Road

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The Ada County Highway District (ACHD) will be reconstructing Ustick Road between Black Cat Road and Ten Mile Road. The purpose of this project is to improve traffic flow and increase safety for all users.

Ustick, Black Cat to Ten Mile

  • Widen Ustick Road to two lanes in each direction, with center turn lanes or center medians at key locations.
  • Construct curb, gutter, and a 10-foot-wide multi-use pathway with a safety buffer on both sides of the roadway for pedestrian and bicyclists.
  • Add a traffic signal at Naomi Avenue.
  • Install an enhanced pedestrian crossing across Ustick Road at the Nine Mile Pathway.
  • Upgrade stormwater facilities and replace irrigation pipes.

Ustick and Black Cat Intersection

  • Widen the Ustick Road and Black Cat Road intersection to include additional through lanes.
  • Add dedicated right and left turn lanes on all approaches.
  • Install curb, gutter, and multi-use pathways.

The Ada County Highway District (ACHD) will be reconstructing Ustick Road between Black Cat Road and Ten Mile Road. The purpose of this project is to improve traffic flow and increase safety for all users.

Ustick, Black Cat to Ten Mile

  • Widen Ustick Road to two lanes in each direction, with center turn lanes or center medians at key locations.
  • Construct curb, gutter, and a 10-foot-wide multi-use pathway with a safety buffer on both sides of the roadway for pedestrian and bicyclists.
  • Add a traffic signal at Naomi Avenue.
  • Install an enhanced pedestrian crossing across Ustick Road at the Nine Mile Pathway.
  • Upgrade stormwater facilities and replace irrigation pipes.

Ustick and Black Cat Intersection

  • Widen the Ustick Road and Black Cat Road intersection to include additional through lanes.
  • Add dedicated right and left turn lanes on all approaches.
  • Install curb, gutter, and multi-use pathways.
  • December 12, 2024

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    • Contractor completed the milling of the south half of the road in preparation for utility relocations and temporary pavement.
    • Temporary asphalt will be placed this week for the new traffic pattern on the south side of Ustick.
    • Irrigation and seepage bed install ongoing.
    • Roadway and sidewalk demo ongoing.
    • Eight Mile irrigation box on Black Cat has been demolished.
  • December 6, 2024

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    • Black Cat Road is closed south of Ustick Road.
    • Contractor completed the milling of the south half of the road in preparation for utility relocations and temporary pavement.
    • Prepping for temporary asphalt.
    • Irrigation and seepage bed install has started.
    • Demo ongoing.
  • November 22, 2024

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    • Contractor has completed implementing traffic control on the project and throughout the southern neighborhoods.
    • Black Cat Road is closed south of Ustick Road.
    • Contractor completed the milling of the south half of the road in preparation for utility relocations and temporary pavement.
  • November 15, 2024

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    • Contractor has started implementing traffic control on the project and throughout the southern neighborhoods.
    • Black Cat Road is closed south of Ustick Road.
    • Contractor milling the south half of the road in preparation for utility relocations and temporary pavement.
  • November 7, 2024

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    • Anticipated notice to proceed with construction on Monday, November 11th.
  • Traffic Advisory - Construction Information

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    Ustick, Black Cat to Ten Mile Project Begins November 11

    ADA COUNTY — Beginning November 11th, work will begin on the Ustick Road, Black Cat to Ten Mile Road project.

    Black Cat Road will be closed between Ustick Road and Moon Lake Drive. Only local traffic will be allowed on Black Cat between Ustick and Cherry Lane. Drivers should use McDermott Road or Ten Mile Road down to Cherry Lane to get around the closure. (see detour map)

    Ustick Road will remain open in both directions, but drivers can expect lane restrictions and flaggers directing traffic during the day.

    Additional traffic calming will be implemented on residential streets near the intersection. Drivers are reminded to follow the posted detour routes to get around the closure.

    During the work, sidewalks on the south side of Ustick Road will be closed. Pedestrians should head south on North Streetwood Avenue (on the west side of Back Cat) or West Niemann Drive (east side of Black Cat), and follow the detour route around the sidewalk closures (see pedestrian detour map).

    The Ustick, Black Cat to Ten Mile Project includes widening Ustick Road to two lanes in each direction, widening the Ustick-Black Cat intersection to include additional through lanes and dedicated right and left turn lanes, among other improvements. Residents can learn more and sign up for project updates on this project page.

  • Pedestrian Detour Map

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  • Detour Map

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  • Construction to start in November

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    In November 2024, the Ada County Highway District (ACHD) will start construction on the Ustick Road, Black Cat Road to Ten Mile Road widening project. Work is expected to be complete in spring of 2026.*

    Traffic and Construction Impacts

    • Ustick Road will remain open throughout construction but may be restricted to one lane in each direction with flaggers.
    • Black Cat Road may be closed periodically as the intersection is reconstructed.
    • ACHD will monitor traffic flow and detour usage and adjust routes as needed.
    • General construction noise, dust, equipment backup alarms and ground vibration.
    • Crews may work from 7 a.m. to 7 p.m. unless otherwise approved.
    • The contractor will work with property owners to minimize construction impacts and maintain access.


    *Due to contractor staffing issues and supply-chain shortages, the construction schedule could change.


  • Spring 2023 Public Outreach

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    The second round of public outreach for this project closed on June 14, 2023. View the infographic and comment summary below!

Page last updated: 12 Dec 2024, 02:46 PM