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

  • May 10, 2024

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    Project substantially complete.

  • April 19, 2024

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    • Asphalt paving complete.
    • Minor work remains.
  • April 12, 2024

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    • Road base prep complete.
    • Contractor paved April 10th.
  • April 5, 2024

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    • Road base prep complete.
    • Contractor is tentatively planning to pave next week.
  • March 29, 2024

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    • Road base prep has started.
  • March 21, 2024

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    • Backfill complete around the structure.
    • Rip Rap is installed.
    • Prep for curb and gutter ongoing.
  • March 15, 2024

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    • Waterproofing complete.
    • Backfill complete around the structure.
    • Prep for curb and gutter started.
  • March 8, 2024

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    • Waterproofing complete.
    • Backfill continues around the structure.
    • Precast sections received.
    • Prep for curb and gutter started.
  • March 1, 2024

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    • Prep for waterproofing complete.
    • Backfill started around the structure.
  • February 23, 2024

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    • Precast sections complete.
    • Wall pours complete.
    • Prep for waterproofing started.