SE 172nd Ave. Widening and Infrastructure Improvements


Project is in design phase.

Updated: Jan. 19, 2023

Happy Valley has been developing at a rapid pace. Developing the infrastructure along 172nd Ave is a high priority for the city. 172nd Ave will be widened to four travel lanes with a center planter median and turn lanes between Misty Dr to Maple Hill Ln with added bike lanes, landscape strips and sidewalks.

Improvements at major intersections include adding a traffic signal at Troge Road and Crossroads Ave, a multi-lane roundabout at Hemrich Road, a multi-lane roundabout at the future 190th Ave intersection, and expanding the single-lane roundabout at Scouters Mountain Road to a multi-lane roundabout. Includes right of way acquisitions, moving existing utilities underground, replacing culverts at Troge Road, enhancing pedestrian crossings and adding street lighting.

The City of Happy Valley will be assisting in project coordination and review. The county will manage and lead the design and construction activities.


To reduce congestion relief, improve safety, provide safe routes and connectivity for bicyclists and pedestrians and to keep pace with future growth of Happy Valley.


  • Design: March 2023 to Spring 2026
  • Right of way: Summer 2024 to Winter 2025
  • Construction: Summer 2026 to Summer 2028

Current activities

  • Project planning and solicitation of design services.

Traffic impact

  • Expect delays on roadway for vehicles and bicycles during construction.


  • Project estimate is $53.3 million
  • Funding is provided from City of Happy Valley Funds and city/county Transportation System Development Charge Joint District Funds.

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Department Staff
Jonathan Hangartner, PE
Project Manager


150 Beavercreek Road Room #325 Oregon City, OR 97045

Office Hours:

Monday to Thursday
8 a.m. to 4 p.m.

Available by phone/email
8 a.m. to 3 p.m.

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