SE 172nd Ave. Widening and Infrastructure Improvements



Updated: Jan. 4, 2024



Simplified Chinese




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 Scouters Mountain Road with added bike lanes, landscape strips and sidewalks.

Improvements at major intersections include adding a traffic signal or roundabout at Troge Road and expanding the single-lane roundabout at Scouters Mountain Road to a multi-lane roundabout. Also 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, improve safety, provide safe routes and connectivity for bicyclists and pedestrians and to keep pace with future growth of Happy Valley.

Share your thoughts by March 29

Learn more about the project and ask questions or share concerns at our virtual open house by Friday, March 29. 


  • Design: March 2023 to Winter 2026
  • Right of way: Summer 2024 to Winter 2026
    All right of way acquisitions are conducted as required by state and federal law. Read right of way brochure: English | español | 简体中文
  • Construction: Spring 2027 to Winter 2028

Current activities

  • Preliminary design and alternatives analysis
  • Preparing for the Feb. in-person and virtual open houses

Traffic impact

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


  • Project estimate is $30 million
  • Funding is provided from City of Happy Valley Funds and joint city/county Transportation System Development Charge Joint District Funds.

Open house resources

Other Resources


English: 172nd Ave Widening and Infrastructure Improvements

español: Ampliación de 172nd Ave y Mejoras en Infraestructura

русский: Расширение и улучшение инфраструктуры вдоль улицы 172nd Ave

简体中文: 172nd Ave 拓宽及基础设施改善工程

tiếng Việt: Cải thiện Cơ sở Hạ tầng và Mở rộng Đường 172nd Ave

한국어: 172nd Ave 확장 및 인프라 개선

Tagalog: Pagpapalawak at Pagpapaganda sa Impraestruktura ng 172nd Ave

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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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