Transportation Engineering

To make travel safer and healthier in Clackamas County, we are developing tools and programs for travelers and employers. This set of tools, or travel options, will help expand awareness about transit services, recreational trails and carpooling to improve public health and reduce greenhouse gas emissions.

What does a travel options action plan do?

The plan will:

• Develop a suite of travel options for people in urban Clackamas County to broaden ways for people to travel without a vehicle.
• Identify new, innovative opportunities to improve mobility.
• Define strategies to help people use transportation networks and infrastructure more effectively without using a vehicle.
• Explore strategies to reduce congestion on roadways such as van pools, commuter shuttles, bike parking, vehicle parking policy and employer-provided reduced cost transit pass programs.
• Fulfill the travel options requirement of the transportation system plan for the State of Oregon
• Develop and implement a pilot program to improve mobility for targeted audiences in Clackamas County.

Project Flyer | folleto del proyecto | Public Engagement Plan

Project Area

All urban areas of Clackamas County are included in this analysis and action plan. The county will coordinate with cities about travel options in their specific areas.

Timeline

Steering Committee

Community members and technical experts will review project work and advise the project team. Meetings are open to the public and include time for public comment.

Monday, August 19, 2024

Agenda Presentation Minutes

Tuesday, October 22, 2024

Agenda Meeting Materials Supplemental Materials Minutes

Steering Committee Members

Presentation to Aging Services Advisory Council - May 19, 2025

Related webpages

• Transportation System Plan
• Walk Bike Clackamas
• Pedestrian and Bikeway Advisory Committee
• Transportation Planning
• Safe Routes to School
• Climate Action Plan
• Damascus Mobility Plan
• Transportation Safety Action Plan
• Traffic Safety Commission

Repairing erosion along the southern bridge support and embankment 

During a routine bridge inspection, erosion was found at the southern support structure and along the slope near the Rainbow Road Bridge over Eagle Creek. We will repair the southern bridge support by installing large boulders and planting native vegetation. 

Why

To repair erosion on the southern bridge supports.

Schedule

Work in the stream is required to be done between July 15-Aug. 31, 2025 to protect waterway species in Eagle Creek. Further details will be provided as they are known.  

• Design: April 2024 to Dec. 2024
• Construction: Summer 2025 

Traffic impact

Expect lane closures with delays up to 20 minutes. Work is expected to take one week to complete.

Current activities 

• Project in design phase
• Coordinating permit applications of all required permits and approvals from local, state and federal regulatory agencies=

Funding

Funding provided by road funds. 

Solar powered flashing lights may not always have enough power to operate reliably. We will connect the flashing sign to power utilities at this busy intersection.

Why

To maintain reliable operations, provide safer roadways for all users and to reduce maintenance costs.

Schedule

• Design: July 2023 – Jan.2024 
• Construction: Jan. 2024 – Summer 2024

Traffic impact

Intermittent lane closures may occur during construction

Current activities

Project in construction phase.

Funding

• Project estimate $200,000.
• Funding is provided from a Community Development Block Grant and county road funds.

The need remains for a transportation link for people that walk and bike across the Clackamas River to connect the cities of Gladstone and Oregon City. 

This phase of the project will identify a preferred bridge structure type and perform up to 30 percent engineering design. The bridge will replace the recently demolished Portland Ave Historic Trolley Bridge and connect the existing Trolley Trail, a shared-use path for bicyclists and pedestrians, to trails that exist along the Clackamas River on the Oregon City side of the river. 

The bridge design continues the work completed in a previous feasibility study. Clackamas County is assisting the City of Gladstone through the design process using the county's ODOT certification. 

Why

To improve active transportation access across the Clackamas River for pedestrians and bicyclists in the Gladstone and Oregon City areas. 

Schedule

Design: March 2024 – Dec. 2025

Traffic impact

No traffic interruptions during design phase.

Current activities

Project design

Funding

• Project estimate $1.37 million 
• Funding is provided from federal funds through the Metro 2022-24 Regional Flexible Fund Allocation Grant and from the City of Gladstone.

Bridge structure options

The intersection at 327th Ave and Bluff Road is located on a sharp curve with a skewed intersection angle in the Boring area.

To improve the safety of the intersection, we will reconfigure the approaching roads and the intersection, add a westbound left-turn lane, improve drainage, remove a portion of pavement, and add signs and pavement markings. We will also consider street lighting enhancements.

Why

To improve sight distance and reduce the frequency and severity of traffic crashes.

Schedule

• Design: June 2024 through June 2025
• Construction: Summer 2026

Traffic impact

Intermittent lane closures may occur during construction

Current activities

Project planning

Funding

• Project estimate $114,000.
• Funding is provided from the Community Road Fund.

Extending Stormwater Infrastructure to Laurie Ave.

The project will install a new 12-inch diameter stormwater main on 436 feet of Laurie Avenue south of Courtney Ave and 6 catch basins to reduce the frequency of flooding. Additionally, 300 feet of stormwater main on Courtney Avenue west of Laurie Avenue will be replaced with 12-inch diameter stormwater pipe. 

Why

The new stormwater main and catch basins are expected to reduce flooding and convey a 10-year storm event.

Schedule

• Design: June 2023 to April 2024
• Construction: March 2025 to July 2025

Traffic impact

Construction is planned to start Monday, March 10, 2025. Expect delays on Laurie Ave and Courtney Ave between 7 a.m. and 6 p.m.

Current activities

Surveying and design services. 

Funding

• Project estimate $800,000.
• Funding is from county road funds.

Ensuring all traffic can cross the bridge without weight restrictions.

The Abernethy Creek (Holly Lane) Bridge crosses Abernethy Creek in the Oregon City area. The bridge has weight restrictions for traffic due to deficiencies in the concrete deck, floor beam cracks, and weakness of the gusset plates and will be replaced to current design standards. 

Why

To carry travelers without load restrictions for all traffic including emergency response and commercial truck traffic.

Schedule

• Design: Winter 2025 to Spring 2027
• Right of way: Winter 2026 to Spring 2027
• Construction: Spring 2027 to Winter 2028

Traffic impact

Expect delays or closures during construction.

Current activities

Waiting for funding agreement to initiate bid proposal for engineering design. 

Funding

• Project estimate $1.4 million
• Funding is provided from the county road funds

Convert the two intersections to two roundabouts, widen the travel lanes to 12 feet, and add bike lanes.

We will also replace the culvert at Boeckman Creek under the intersection with a fish passable culvert, and add stormwater facilities to treat water runoff.

Clackamas County is partnering with Washington County and the City of Wilsonville since the intersection spans multiple jurisdictions.

 Proposed design for the two roundabouts.

Why

To reduce congestion and improve safety for all travelers, and provide safe passage for fish and other wildlife though waterways.

Schedule

• Project planning and design: Fall 2024 – Summer 2027
• Right of Way Acquisition Efforts: Spring 2026 – Summer 2027
  All right of way acquisitions are conducted as required by state and federal law. Read right of way brochure: English | Spanish.
• Construction: Winter 2027 – Spring 2029

Current activities

• Stafford-65th-Elligsen roundabout open house, Feb. 10
  5:30 to 7:30 p.m., Tuesday, Feb. 10
  Wilsonville City Hall 29799 Town Center Loop E, Wilsonville, OR 97070

  Ask your questions to transportation experts at an in-person open house. Our engineering design team is creating a 60% level layout for your review.

  It's important to discuss the project with neighbors and learn new things about the project area to help inform the design. After design plans are finalized, it is difficult and more expensive to change design features.

• Refining the proposed improvement design, utility coordination, and environmental permitting. 

Traffic impact

• Road closures are anticipated for a portion of this project. When construction work can safely occur with traffic, one lane will be closed at a time.  

Funding

• Project estimate $14 million
• Funding is provided from Community Road Fund and Transportation System Development Charges, City of Wilsonville funds, and Washington County funds

Resources

• Presentation to Stafford Hamlet [video], Nov. 12
• Open house #1 documents
  • Schedule
  • General area map
  • Traffic and crash data
  • Full map: Multilane roundabout (option 1)
  • Full map: Two traffic signals (option 2)
  • Full map: Two roundabouts A (option 3, alignment A)
  • Full map: Two roundabouts B (option 3, alignment B)