2023 State Street Improvements: State and 16th/ State, 4th to 2nd

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This project is substantially complete. 

The Ada County Highway District (ACHD) will be constructing improvements to the State Street and 16th Street intersection and State Street from east of 4th Street to 2nd Street starting as early as late late March.* Work is expected to be complete by Summer 2024.

Project Description

  • Reconstruct both the State Street & 16th Street intersection and State St., east of 4th Street to 2nd Street
  • Complete traffic signal work at State Street & 16th Street
  • Add bioretention curb extensions and updated pedestrian ramps to both segments of State Street
  • As part of this project, ACHD will also be adding dual enhanced pedestrian crossings with bike push buttons across State Street at 3rd Street

Traffic and Construction Impacts

  • When the street isn’t closed, traffic flow will be prioritized during heavy commute times in the mornings and evenings. Crews will work 9 a.m.- 4 p.m. during the day and 8 p.m.-5 a.m. at night.
  • Night and weekend work is to be expected.
  • Crews may work 24 hours a day when blocks are fully closed, though night work will be evaluated for each location and must be pre-approved by ACHD.
  • One travel lane in each direction will remain open unless the street segment is completely closed.
  • Temporary pedestrian and bicyclist detours.
  • Temporary on-street parking impacts.
  • General construction noise, including equipment backup alarms, dust and ground vibration.
  • The contractor will coordinate with property and business owners to maintain access or provide alternative access.

*The construction schedule could change due to contractor staffing issues and supply-chain shortages.

The Ada County Highway District (ACHD) will be constructing improvements to the State Street and 16th Street intersection and State Street from east of 4th Street to 2nd Street starting as early as late late March.* Work is expected to be complete by Summer 2024.

Project Description

  • Reconstruct both the State Street & 16th Street intersection and State St., east of 4th Street to 2nd Street
  • Complete traffic signal work at State Street & 16th Street
  • Add bioretention curb extensions and updated pedestrian ramps to both segments of State Street
  • As part of this project, ACHD will also be adding dual enhanced pedestrian crossings with bike push buttons across State Street at 3rd Street

Traffic and Construction Impacts

  • When the street isn’t closed, traffic flow will be prioritized during heavy commute times in the mornings and evenings. Crews will work 9 a.m.- 4 p.m. during the day and 8 p.m.-5 a.m. at night.
  • Night and weekend work is to be expected.
  • Crews may work 24 hours a day when blocks are fully closed, though night work will be evaluated for each location and must be pre-approved by ACHD.
  • One travel lane in each direction will remain open unless the street segment is completely closed.
  • Temporary pedestrian and bicyclist detours.
  • Temporary on-street parking impacts.
  • General construction noise, including equipment backup alarms, dust and ground vibration.
  • The contractor will coordinate with property and business owners to maintain access or provide alternative access.

*The construction schedule could change due to contractor staffing issues and supply-chain shortages.

This project is substantially complete. 

  • October 6, 2023

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    • Water work for Veolia continues between 2nd and 4th Street.
    • Testing mainline complete.
    • Service installation started.

  • September 29, 2023

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    • Water work for Veolia continues between 2nd and 4th Street
    • Testing mainline complete
    • Service installation started

  • September 22, 2023

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    • Water work for Veolia continues between 2nd and 4th Street.
    • Testing mainline in preparation for service install.

  • September 15, 2023

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    • Water work for Veolia continues between 2nd Street and 4th Street.
    • Mainline work on State Street.

  • September 8, 2023

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    • Water work for Veolia started between 2nd Street and 4th Street on August 23.
    • Mainline work on State Street has started.
    • Contractor started demo on curb & gutter on 2nd Street.

  • August 31, 2023

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    • Water work for Veolia started between 2nd Street and 4th Street on August 23rd.
    • Contractor will start demo on curb, gutter, on 2nd, starting September 1st.

  • August 25, 2023

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    • Work is on State Street,2nd Street to east of 4th Street and the State Street/16th Street intersection.
    • Contractor anticipates starting between 2nd Street and 4th Street on August 23rd.

    In an effort to keep work progressing and keep crews and commuters safe, detours will be put in place for pedestrians starting Monday. North/south crossings will be closed at State from 2nd to 3rd Streets. If pedestrians need to cross State, crossings will need to take place at 1st or at 4th. Pedestrians will need to detour to Fort and Jefferson. We appreciate your patience as this important work takes place.

  • August 21, 2022

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    Starting Wednesday, August 23rd, crews will begin working on the 2023 State Street Improvements Project. Please review the detour map below.

  • July 28, 2023

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    The contractor anticipates starting on the north side of 16th Street in early/mid-August.