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OR 99E: Rockfall Improvement Project

Project Completed

Region 1: Portland metro and Hood River County (Oregon City, Clackamas)

We constructed a project in summer 2018 to increase the stability of the hillside and traffic safety of Oregon 99E in Oregon City. 


Traffic Impact

This project is complete. No traffic impacts are planned. 



Visit our online open house​ to learn more about the project and provide feedback. 

Work will occur on two sections of the hillside. The project area stretches ​from the south side of the tunnel at Railroad Avenue through Old Canemah Park. The hillsides in this area have a history of rocks falling from the slopes and closing the highway. We previously installed wire mesh on the hillsides to help control the rockfalls in the 1983 and 1995.

Click on photo below to view the interactive map to see the project area and where rockfalls have happened in the past. Click on each icon to learn more. 
A map of the project area, stretching from the south side of the tunnel through Old Canemah Park.



OR 99E | ​from the south side of the tunnel at Railroad Avenue through Canemah Park​​

Cost and Funding

​Project cost: $​1,789,000


In Oregon City, the steep hillside next to Oregon Highway 99E has a history of rockfalls. This project will increase safety by reducing the potential for rocks falling and to impacting the highway and travelers.​​

What Problem Will This Improve?

For Section 1, the northern section, the contractor removed vegetation that was in danger of falling from the face of the slope or loosening rock. They will also install any rock bolts needed to stabilize the slope. For Section 2, the southern section, the existing wire mesh needs to be moved or removed and the hillsides need to be scaled, which removes loose rocks from the slopes. The contractor also removed vegetation. They will install any rock bolts needed to stabilize the slope and reinstall or replace any wire mesh that is damaged. Scaling is needed in Section 2 because the wire mesh is older than Section 1. Section 2 also has experienced more severe rockfalls recently. ​

Additional Information

Other work in the area? 
ODOT is also planning an illumination project in Oregon City at the railroad tunnel and pedestrian tunnel (next to Section 1) that will increase visibility in both tunnels and reduce maintenance costs. The roadway and pedestrian tunnels have obsolete fixtures and electrical systems that need to be updated. A proposed element of the project is to install a variable message sign south of the tunnel on a new cantilever sign structure. We are planning to make improvements to the lighting in early 2019. More information will be provided as it is available. ​​
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For ADA (Americans with Disabilities Act) or Civil Rights Title VI accommodations, translation/interpretation services, or more information call 503-731-4128, TTY (800) 735-2900 or Oregon Relay Service 7-1-1.

¿Hablas español? Podemos proporcionar la información de esta publicación en español. Para recibir información por favor llame al (503) 731-4128.

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Last Updated

3/21/2019 10:40 AM

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