Transportation Engineering

The intersection of Canby-Marquam Hwy and Lone Elder Road is a T-intersection that is stop-controlled on Lone Elder Road and uncontrolled along Canby-Marquam Hwy. The project reconstructed the intersection and added a northbound left-turn lane. Congestion in the northbound direction on Canby-Marquam Hwy occurs in large part from vehicles waiting to turn left onto Lone Elder Road.

Why

To reduce wait times on Canby-Marquam Highway at Lone Elder Road and create a safer intersection for all travelers.

Schedule

• Design: March 2020 - Dec. 2021
• Right of way: Nov 2021 - Oct. 2022
• Construction: Aug. 2023 - Oct. 2023

Funding

• Project cost $1.05 million funded by the Community Road Fund and countywide transportation system development charges.

The Rhododendron Main Street redevelopment plan provided an opportunity for the county, residents and businesses to meet the needs of reducing demand on the transportation system while accommodating desired housing near along Hwy 26. The project area is almost 4 acres centered on two privately held properties on the southwest side of Hwy 26. Publicly owned lands next to the project include the Rhododendron Swinging Bridge and Rhododendron Community Landscape at the Barlow Trail Oregon Historic Marker.

Final Report 

• Final Report
• Final Appendices

Updated: Feb. 2, 2022

Engagement and survey results

• Rhody Rising Virtual Tour, April 16, 2020
• Community survey highlights future options for Rhododendron, Mountain Times, July 30, 2020 
• Rhododendron Main Street Redevelopment Plan: Survey Summary 

Project partners

• Mt. Hood Holdings
• Rhododendron Community Planning Organization
• Transportation and Growth Management Program
• Oregon Department of Transportation

Consultant

• MIG, Inc.

Funding

• Project estimate is $68,350
• Funding provided from a Transportation and Growth Management Grant - Quick Response Program from ODOT and Oregon Department of Land Conversation and Development.

Add a crosswalk with flashing lights, pedestrian island and ADA-compliant curb ramps.

To provide a safe place for Lot Whitcomb Elementary students, families and community members to safely cross SE Fuller Road.

Schedule

• Construction start: Aug. 2022
• Construction complete: Nov. 2022

Traffic impacts

Rolling single lane closures for road striping

Current activities

• Preparing for road striping in the spring as weather allows. 

Funding

• Project estimate is $441,000
• Funding is provided from the County Road Fund and a Safe Routes to School grant from the Oregon Department of Transportation.

Adding a roundabout at Childs Road, realigning Johnson Road to eliminate intersection skew and reduce steep slopes, adding a southbound left-turn lane at Johnson Road, widening Stafford Road between Pattulo Way and Rosemont Road to add bike lanes, and replacing the Pecan Creek culvert at Childs Road with a larger, fish-passable culvert. 

Why

To improve safety and capacity at the intersections of Stafford Road with Johnson Road and Childs Road and to provide a safe route for bikes along Stafford Road. 

Schedule

• Design: March 2021 to Dec. 2024
• Right of way: Sept. 2022 to Dec. 2024
• Utility relocation: Fall 2024 to Spring 2025
• Construction: Spring 2025 to Winter 2026

Current activities

• Utility relocations of telecommunications, gas, and power facilities.
• Construction bidding and contracting is expected to be completed by end of April. A detailed staging schedule will be available by April or May.
   

Traffic impacts

Impacts to vehicle and bicycle facilities and delays during construction. Details and schedule of road closures will be available in April. 

Construction starts in May with road closure; utility relocations continue through April

The first season of road construction will begin in May. A detailed road closure schedule and detour route will be shared in a future update. The information below provides the general stages of construction. Watch for message boards along Stafford Road and check the project website for updates.

1. May 5 – July 14, 2025: Stafford Road and Johnson Road closed to thru traffic from north of Pattulo Way to south of Childs Road
2. July 15 – Sept. 30, 2025: Stafford Road and Childs Road closed to thru traffic from north of Johnson Rd to south of Rosemont Road
3. Oct. 1, 2025 – April 31, 2026: Childs Road closed to thru traffic. Stafford Road and Johnson Rd open to traffic.
4. May 1 – Aug.31, 2026: Stafford Road and Childs Road closed to thru traffic from north of Johnson Road to south of Rosemont Road
5. Sept. 1 – Sept. 30, 2026: Stafford Road and Johnson Road closed to thru traffic from north of Pattulo Way to south of Childs Road
6. Oct. 1 – Dec. 31, 2026: All roads open to traffic. Construction under flagging.

There will be one signed detour route for truck and passenger vehicles along I-205, I-5, Boones Ferry Road, County Club Road. See map below. We understand there may be other unsigned detour routes available depending on time of day and your destination. Please use caution near the work zone.

Thank you in advance for your patience as we work to complete this project as quickly and safely as possible.

Funding

• Project estimate is $18 million
• Funding is provided from Community Road Funds and Transportation System Development Charges. 

Other Resources

• Presentation to Stafford Hamlet, April 8, 2025
• Presentation to Palisades Neighborhood Association, May 9, 2024
• Presentation to West Linn Council, Oct. 2, 2023
• Presentation to Stafford Hamlet, Nov. 8, 2022
• Presentation to Stafford Hamlet, March 8, 2022
• Presentation to Stafford Hamlet, Jan. 12, 2021
• Road Safety Audit: Stafford Road between Wilsonville and Lake Oswego City Limits Report to Hamlet, Feb 2018
• PGE Tonquin infrastructure upgrade project

Pave two inches of asphalt, adjust and lengthen guardrail, and add white fog lines along two miles of Salmon River Road from Hwy 26 to Welches Road to provide a smoother ride and preserve access to Salmon Huckleberry Wilderness area.

Updated: 3/4/20

Status: Completed

Contact: Mike Ward, Project Manager, mward@clackamas.us, 503-742-4688

Funding

• Project estimate is $750,000
• Funding is provided from the Federal Lands Access Program matched with County Road Funds.

One way that has been proven to decrease traffic crashes is to post safety signage alerting travelers to changing conditions ahead. The county has received a grant from ODOT to install over 2,500 curve and stop ahead warning signs throughout unincorporated Clackamas County to improve safety on our roads.

Crash reductions associated with addition of curve warning signs (as compared to curves with no curve warning signs), and stop ahead warning signs are as follows: 

• Curve Warning Signs with Speed: 13% reduction in all fatal and injury causing crashes
• Chevrons: 20–35% reduction in fatal and injury causing crashes
• Intersection Warning Signs with Street Name: 22% reduction in overall crashes; 35% reduction in right-angle crashes
• Stop Ahead Signs: 35% reduction in angle crashes
• Double Stop Signs: 11% reduction in overall crashes; 55% reduction in angle crashes

The traffic safety team has assessed and determined proper speeds to post at each road segment where curve warning signs will be installed at along the following roads: 

• Corridors
  • Advance Road
  • Amisigger Road
  • Barlow Road 
  • Barlow Trail Road
  • Central Point Road 
  • Clackamas River Drive
  • Dryland Road 
  • Firwood Road
  • Fischers Mill Road 
  • Gronlund Road
  • Hattan Road 
  • Henrici Road 
  • Kamrath Road 
  • Lolo Pass Road
  • Maplelane Road 
  • Meridian Road 
  • Mountain Road
  • Redland Road 
  • Schaeffer Road
  • Stafford Road 
  • Ten Eyck Road
     
• Intersections
  • NE Miley Road/Airport Road NE 
  • Amisigger Road/Judd Road
  • Bakers Ferry Road/Harding Road
  • S Barlow Road/S Arndt Road
  • S Barlow Road/S Knights Bridge Road 
  • S Barlow Road/S Lone Elder Road 
  • S Barlow Road/S Barnards Road/S Whiskey Hill Road
  • S Barlow Road/S Meridian Road/Woodburn Monitor Road NE 
  • S Barnards Road/S Elisha Road 
  • S Barnards Road/S Dryland Road 
  • S Beavercreek Road/S Windy City Road/S Unger Road
  • S Beavercreek Road/S Upper Highland Road 
  • S Beavercreek Road/S Larkin Road 
  • S Beavercreek Road/S Lower Highland Road
  • S Beavercreek Road/S Carus Road 
  • S Beavercreek Road/S Ferguson Road 
  • S Beavercreek Road/S Leland Road/S Kamrath Road
  • Canby-Marquam Hwy/S Barnards Road 
  • Canby-Marquam Hwy/S Heinz Road 
  • Canby-Marquam Hwy/S Gribble Road
  • Canby-Marquam Hwy/S Macksburg Road 
  • Canby-Marquam Hwy/S Lone Elder Road 
  • S Central Point Road/S Mulino Road 
  • S Central Point Road/S Township Road 
  • S Central Point Road/S Carus Road 
  • S Dryland Road/S Heinz Road 
  • S Dryland Road/S Harms Road/S Macksburg Road
  • S Harms Road/S Macksburg Road
  • Eagle Creek Rd/Currin Road
  • Eagle Creek Road/Duus Road
  • Eagle Creek Road/River Mill Road
  • Firwood Road/Bornstedt Road
  • S Fischers Mill Road/S Hattan Road 
  • S Fischers Mill Road/S Deininger Road 
  • S Fischers Mill Road/S Mattoon Road 
  • Gronlund Road/Hattan Road 
  • S Henrici Road/S Ferguson Road 
  • Hoffman Rd/Petes Mountain Rd/Riverwood Dr 
  • S Kamrath Road/S Carus Road 
  • Kelso Road/Amisigger Road
  • Kelso Road/Richey Road
  • Kelso Road/Tickle Creek Road
  • Kelso Road/312th Drive
  • Kelso Road/Orient Drive
  • S Leland Road/S Leslie Avenue 
  • S Leland Road/S New Era Road 
  • S Maplelane Road/S Ferguson Road 
  • S Meridian Road/S Whiskey Hill Road 
  • S Meridian Road/S Sconce Road 
  • S Meridian Road/S Elliott Prairie Road
  • Orient Drive/Bobby Bruce Lane
  • Orient Drive/Compton Road
  • Orient Drive/Revenue Road
  • S Redland Road/S Springwater Road
  • S Redland Road/S Ridge Road
  • S Redland Road/S Hinkle Road
  • S Redland Road/S Henrici Road 
  • S Redland Road/S Fischers Mill Road 
  • S Redland Road/S Fieldstone Road
  • S Redland Road/S Bradley Road 
  • S Redland Road/S Ferguson Road
  • S Redland Road/S Holly Lane
  • Springwater Road/Clackamas River Drive
  • Springwater Road/Hattan Road
  • Springwater Road/Bakers Ferry Road
  • Springwater Road/Strowbridge Road
  • Springwater Road/Hayden Road
  • Springwater Road/Metzler Park Road
  • Stafford Road/Homesteader Road 
  • Stafford Road/65th Ave -- Complete
  • Stafford Road/Schatz Road
  • Stafford Road/Newland Road 
  • Stafford Road/Mountain Road 
  • Stafford Road/Johnson Road 
  • Stafford Road/Childs Road 
  • S Union Mills Road/S Windy City Road/S Marshall Road 
  • S Central Point Road/S Union Hall Road
  • Wildcat Mountain Drive/Eagle Fern Road
  • S Redland Road/S Lyons Road
  • S Redland Road/S Sprague Road
  • S Dryland Road/Toliver Road
  • Stafford Road/SW Gage Road

For more information, read the ODOT Fact Sheet on Updated Curve Warning Signs.

Funding:

Funding is provided from the ODOT All Roads Transportation Safety (ARTS) Program.

Add left-turn lanes at Ferguson and Bradley intersections, with a transition to two-lanes between the intersections with lane widths that will closely match the width of the current lanes to provide a safer roadway for all users and to reduce wait times at the intersection.

The existing road dimensions include two 11-foot travel lanes and two 5-foot paved shoulders. The design includes constructing a 12-foot wide left-turn lane at Ferguson Road and a 12-foot wide left-turn lane at Bradley Road with buffered bike lane shoulders.

Crash data from 2016–2018 shows most incidents as rear-end crashes during daytime hours.

60% design map

Schedule

• Design: Dec. 2020 - May 2023
• Right of Way: July 2022 - May 2023 
• Construction: August 2023 - June 2024

Traffic impacts

Rolling single lane closures may be needed during construction.

Current activities

Paving the final layer and adding permanent road striping is now complete. Driveway connections will occur after paving is complete along the main part of the roadway. Afterwards, gravel will be placed along shoulders and at gravel driveways. 

Funding

• Project estimate is $3 million
• Funding is provided from Community Road Funds, County Road Fund and HB2017 state gas tax 

Other Resources

• 60% design map, May 6, 2022
• 30% preliminary design map, Jan 4, 2022
• Presentation to Redland-Viola-Fischers Mill CPO, May 5, 2021
• Presentation to Redland-Viola-Fischers Mill CPO, Aug. 3, 2022

Clackamas County received state funds to replace the existing bridge on Canby-Marquam Highway over Bear Creek.

The existing bridge, built in 1960, was showing signs of decay as a result of heavy truck traffic. The bridge was considered functionally obsolete (narrow) and structurally deficient, with a sufficiency rating of 27.2 out of 100. Temporary repairs  to the timber components until the bridge were made prior to replacement. The asphalt required constant repair due to the bridge vibrating and shaking when trucks travel on the bridge.

Bridge replacement description

The replacement bridge is a new precast, concrete single-span structure spanning Bear Creek on the current alignment. The new bridge is approximately 83 feet long with a total width of 40 feet (two 12-foot wide lanes, two 6-foot wide shoulders, and two 2-foot wide barrier rails). The bridge is founded on 16-inch diameter steel piles approximately 50 feet deep below ground surface. 

Current activities

• Construction is substantially complete. 
• Temporary road striping placed in Nov. 2022 and permanent striping will be placed in the late spring or early summer 2023.
• Plants will be monitored quarterly to verify establishment in 2023.

Engineer

Joel Tubbs, PE (David Evans & Associates)

Contractor

Carter and Company, Inc.

Funding

• Estimated total project cost: $2.6 million
• Funded through Local Project Program Funds matched with county road funds

An existing intersection at Victory Road and Forsythe Road, south of Cliff View Drive, had limited site distance and experienced periodic crashes. Recent development near the intersection created significant changes. The County and developer previously negotiated an agreement for the developer to dedicate funds and the necessary right of way to realign the road at the intersection and significantly improve the site distance. Nearly 1000 LF of new roadway alignment was constructed, including excavation, pavement, stormwater, guardrail and signing efforts. Additional scope was added to include improvements made along Forsythe Road, including additional embankment, a guardrail run with terminal end pieces, and improvements to the vertical curve in order to close the existing Victory Road's access to Forsythe Road and open a new access approximately 300 feet to the west.

Updated: 12/06/19

Contact: Bob Knorr, Project Manager: rknorr@clackamas.us, 503-742-4680

Engineer: Joel Howie, PE (Clackamas County, DTD Transportation Engineering)

Contractor: Kerr Contractors Oregon, LLC

Funding: Estimated cost to complete the project is $480,198.50, funded by the County in cooperation with the nearby area developer.

Improving safety and connectivity for pedestrians, cyclists, and motorists along SE Jennings Ave.

This project, along SE Jennings Ave. between Highway 99E (McLoughlin Blvd.) and SE Oatfield Road, will help connect residents to nearby businesses and transportation options, and provide safe routes for students to travel to local schools in the area.

 Proposed design for all of SE Jennings Ave. within the project limits.

Schedule

Bids were received and contract was awarded in February 2024 to Emery and Son’s Construction.

• Project planning and design: Nov. 2019 – Nov. 2023
• Right of Way Acquisition Efforts: Jan. 2021 – Sept. 2023
  All right of way acquisitions are conducted as required by state and federal law. Read right of way brochure: English | Spanish.
• Construction: May 2024  – July 2024

Traffic impacts 

• No traffic impacts during winter pause
• When construction starts up in the spring, expect work between 7 a.m. and 6 p.m., Monday–Friday, and Saturdays as needed. 
• Due to unforeseen conditions with the retaining walls and subsequent supply chain issues for our replacement materials, the project schedule is delayed.
  
  As weather allows, work will continue through the winter to finish the final large wall between Hwy99 and Addie St., sidewalks and road widening between Mcloughlin Blvd and Boardman Creek. 
  
  In the spring the road will be prepped for paving, and then painted with road striping after the curing period. Estimated completion of paving June 1-30, 2025.
   

Engineer/consultant

Nicholas McMurtrey, PE; Murraysmith, Inc.

Things to be aware of

Traveler Safety FAQs

This section of Jennings Ave. is being considered now because it best fit the criteria for Metro’s Regional Flexible Funds Allocation funding program (a key funding source). It is the appropriate size and had already been identified as a high priority project in the Clackamas County Transportation System plan. 

In 2013, Clackamas County requested funds for this project from Metro’s Regional Flexible Funds Allocation (RFFA) program, a process used by Metro to distribute federal money to local projects. In November 2013, Metro notified the county that they had awarded funds for this project to begin in 2016–2018. Since the project was not fully funded, the county needed to identify additional funding sources. Once additional funding was identified and the county completed the contracting process with the Oregon Department of Transportation, we were able to begin working on the project in 2019. 

Plans for work on other portions of Jennings Ave.

The Clackamas County Transportation System Plan (TSP) includes improvements of bike lanes and sidewalks for the entire length of Jennings Ave. between McLoughlin Road and Webster Road. Project priorities in the TSP were developed with input from the community and adopted by the Board of County Commissioners.

• The current project between Oatfield and McLoughlin is a Tier 1 (top) priority projects
• The segments between River Road and Oatfield are identified as Tier 1 (top) priority projects (Project #1068). 
• The segment between Oatfield Road and Webster Road is a Tier 2 (second level) priority project (Project #2021). 

Projects along the other segments of Jennings, both the segment from River Road to Mcloughlin and the segment from Oatfield to Webster, will be constructed when we can get funding for them. We depend on outside funding sources for sidewalk and bike lane improvements and work diligently to match needed projects to funding from state and federal resources.
 

Notices will be sent to area residents and property owners at key points during the process.

Share your comments and ask questions.

Funding

• Estimated project cost: $8.6 million
• Funding sources: Oregon Department of Transportation (ODOT), Federal Highway Administration (FWHA) and Clackamas County

Other Resources

• Presentation to Jennings Lodge CPO, March 22, 2022

Project area

Existing conditions

There are many sections of SE Jennings Ave. without sidewalks or bike lanes. Some examples of these incomplete connections that will be completed as part of this project are shown below.

Traffic analysis