Ada County Highway District

2019 Downtown Boise Maintenance

Construction Update as of 8/19/19:

Idaho Street, 11th to 13th: Milling operations for the full width of the roadway will start on August 20th. The road will remain open and traffic will be swapped from one side of the road to the other. Paving operations are expected to start August 21st. The road will remain open. Work will continue through the intersection of Idaho Street and 11th Street. This may cause delays at 11th Street. There will be flaggers at Main and Bannock to assist motorists and help redirect traffic as needed in advance of the intersection.

16th Street, State to Jefferson: Milling operations are expected to take place on August 21st. Paving operations are expected to take place on August 22nd.

16th Street, Front to Jefferson: Milling operations are expected to take place August 25th-27th. Paving operations are expected to take place on August 28th-30th.

Manholes on 16th Street will be lowered the week before milling operations begin.

For up-to-date information on this and other work, please see the ACHD Roadwork in the Area map

There was a preconstruction conference held on May 7th.

General Description:
The Ada County Highway District will begin its 2019 Downtown Boise Maintenance which is pavement rehabilitation project. Construction is scheduled to start early May 2019 and run through late September 2019. Work includes repaving, replacing some curb, gutter sidewalk and pedestrian ramps and utility relocation and replacements. Project segments include:

2019 Downtown Boise Implementation - HB312

  • 16th Street, Front Street to State Street: Concrete work is complete, milling and paving expected the end of August
  • 15th Street, Front Street to State Street: Concrete work expected to begin as early as June 18th
  • Bannock Street, 16th Street to 15th Street: COMPLETE
  • Bannock Street, Capitol Boulevard to 2nd Street: COMPLETE

Main Street and Idaho Street, 16th Street to Broadway Avenue - HB312

  • Main Street, 16th Street to 13th Street: Concrete work is ongoing
  • Main Street, 10th Street to 8th Street: Concrete work is ongoing
  • Main Street, Capitol Boulevard to Broadway Avenue: Concrete work is ongoing
  • Idaho Street, 16th Street to Broadway Avenue: Milling and Paving on Idaho Street, 11th Street to 13th Street will be the week of August 19th.

Time Frame

Start Date:
May 2019
End Date:
Fall 2019

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