Ada County Highway District

2018 Green Stormwater Implementation Project

Construction update as of 6/21/18:  Crews removed the asphalt on the alley between 4th and 5th streets. Utility relocations will take place the next few weeks.

General Description:
Starting in early June, the Ada County Highway District will retrofit the following alleys in Downtown Boise with permeable pavers:

  • The alley between 4th and 5th streets north of Main Street
  • The alley between 8th and 9th streets north of Fulton Street

Permeable pavers help eliminate standing water and clean the rain and snow melt. The result is less polluted runoff returning to the Boise River.

The Capital City Development Corporation (CCDC) will provide hardscape enhancements for the alley between 8th and 9th streets. Utility work and replacements will also be included in the project. 


Time Frame

Start Date:  June 2018
End Date:  September 2018

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Project Manager

Brian McCarthy

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