South End Road Landslide Repairs

South End Road was damaged in March 2017 as a result of heavy rains. A state emergency declaration, which included Clackamas County, was signed by the governor that allowed Clackamas County to be eligible for the federal funding. Federal Emergency Relief Program (ERP) funds were received to stabilize the roadway and slope on South End Road near Coffee Creek (milepost 3.8).

Status

Updated: June 21, 2022

Clackamas County constructed temporary pavement repairs to these areas in the spring of 2017. Additional geotechnical exploration and surveying defined subsurface conditions and identified solutions to stabilize the slope.

Two types of retaining walls designed to prevent future slide activity will be built on the embankment along the north side of South End Road. A section of the roadway will be reconstructed where cracks have surfaced. Drainage will be improved on the west side of the road to carry water away from the roadway to prevent future damage.

Schedule

Project design is complete. Construction is planned for May 2022. Construction is expected to be substantially complete by June 2023.

Traffic impacts

A full road closure is expected during construction to all traffic during construction between 5th Ave and Barker Ave, May 23 through Nov. 24, 2022. Vehicles will be detoured along Warner-Parrot Road, Linn Ave., 5th St. and High St.

South End work

Current activities

  • Construction in progress.
  • Crews are working to install underground supports (piles) for the two retaining walls. As of June 21, 20 of 102 supports have been installed. Future work includes installing 62 anchors for the second retaining wall, drainage improvements and road repair. Work is on schedule to be completed in Nov.

Funding

  • Estimated total project cost: $4.6 million
  • Funded through a federal emergency relief program ($4 million) matched with County Road funds ($600,000)

Other Resources

Frequently Asked Questions

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During construction there will be no pedestrian access. It’s possible a walkway could be provided for pedestrian access after work hours depending on the contactor agreement. 

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No. Emergency funding can only be used for repairs to return the roadway to the previous condition.

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We have investigated the cracking and are monitoring for landslide activity. At this time, no road closure is needed. If conditions require a road closure to maintain safety before construction begins, we will close the road. 

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Yes. There will be a few hazardous trees to take down. As part of the City of Oregon City requirements, we will plant two new trees for every tree we need to remove. 

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Contact
Department Staff
Joel Howie
Project Manager
503-742-4658
Stan Monte
Construction Project Manager
503-742-4678