Topaz Avenue Bridge

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Project substantially complete

As part of the Ada County Highway District’s (ACHD) Bridge Maintenance Program, ACHD will replace the culvert on Topaz Avenue north of Overland Road, as early as the beginning of November 2023.* Construction is expected to be complete spring of 2024.

This bridge improvement project will include removing and replacing the existing bridge over the Five Mile Creek.

*Construction schedules may change due to high demand for contractors, labor, and supplies.

As part of the Ada County Highway District’s (ACHD) Bridge Maintenance Program, ACHD will replace the culvert on Topaz Avenue north of Overland Road, as early as the beginning of November 2023.* Construction is expected to be complete spring of 2024.

This bridge improvement project will include removing and replacing the existing bridge over the Five Mile Creek.

*Construction schedules may change due to high demand for contractors, labor, and supplies.

Project substantially complete

  • December 1, 2023

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    • Contractor to start on Topaz December 4th.
    • Notification boards have been set.

  • August 24, 2023

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    Construction Impacts

    • Temporary road closures
    • Lane restrictions with flaggers
    • General construction noise, dust, equipment backup alarms and ground vibration
    • Crews will work from 7 a.m. to 7 p.m. unless otherwise approved
    • The contractor will work with property owners to minimize construction impacts