Lake Hazel and Maple Grove Roundabout

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This project is substantially complete. 

The Ada County Highway District (ACHD) is designing a future roundabout for the Lake Hazel & Maple Grove intersection. The purpose of the project is to improve traffic flow and increase safety for all users.

Project Description

  • Construct a multi-lane roundabout at the Lake Hazel and Maple Grove intersection
  • Add curb, gutter, and a detached 10-foot wide multi-use pathway
  • Construct crosswalks at each leg of the intersection with two-stage pedestrian crossings
  • Install rectangular rapid flashing beacons (RRFBs) at each pedestrian crosswalk
  • Add a truck apron for larger vehicles to use if necessary

The Ada County Highway District (ACHD) is designing a future roundabout for the Lake Hazel & Maple Grove intersection. The purpose of the project is to improve traffic flow and increase safety for all users.

Project Description

  • Construct a multi-lane roundabout at the Lake Hazel and Maple Grove intersection
  • Add curb, gutter, and a detached 10-foot wide multi-use pathway
  • Construct crosswalks at each leg of the intersection with two-stage pedestrian crossings
  • Install rectangular rapid flashing beacons (RRFBs) at each pedestrian crosswalk
  • Add a truck apron for larger vehicles to use if necessary

This project is substantially complete. 

  • April 25, 2024

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    • Contractor working on sidewalk at various locations around the project.
    • Contractor completed concrete pavement mainline.
    • Asphalt paving complete.
    • Installation of pavement markings is on-going.
    • Anticipate opening three legs of the roundabout as early as April 26th.

  • April 19, 2024

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    • Contractor working on sidewalk at various locations around the project.
    • Splitter island concrete placements complete.
    • Contractor completed concrete pavement mainline.
    • Asphalt paving complete.
    • Installation of pavement markings is on-going.

  • April 12, 2024

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    • Contractor working on sidewalk at various locations around the project.
    • Splitter island concrete placements complete.
    • Contractor continues placing concrete pavement mainline this week and next.

  • April 5, 2024

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    • Contractor working on sidewalk at various locations around the project.
    • Splitter island concrete placements complete.
    • Contractor continues placing concrete pavement mainline this week and next.

  • March 29, 2024

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    • Contractor working on sidewalk at various locations around the project.
    • Splitter island concrete placements complete.
    • Contractor started concrete paving mainline this week.

  • March 21, 2024

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    • Contractor working on curb/gutter and sidewalk at various locations around the project.
    • Splitter island concrete placements nearly complete.
    • Contractor is grading for paving which is scheduled for the week of March 25th.



  • March 15, 2024

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    • Contractor working on curb/gutter and sidewalk at various locations around the project.
    • Light poles are set.
    • Blue top survey work ongoing for final grade.
    • Splitter island prep complete.

  • March 8, 2024

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    • Grade prep for sidewalks curb & gutter is ongoing.
    • Prep for center island complete.
    • Contractor working on curb/gutter and sidewalk at various locations around the project.
    • Light poles are being set this week.

  • March 1, 2024

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    • Contractor importing and grading base materials.
    • Grade prep for sidewalks C&G is on going.
    • SW retaining wall installation complete.
    • Prep for center island started.
    • Contractor working on C&G at various locations around the project.

  • February 23, 2024

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    • Contractor importing and grading base materials.
    • Grade prep for sidewalks C&G is on going.
    • SW retaining wall installation complete.
    • Prep for center island started.
    • Electrical contractor on site pulling wire and setting control cabinets/boxes.