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The City of Portland, Oregon

Environmental Services

working for clean rivers

Phone: 503-823-7740

Fax: 503-823-6995

1120 SW 5th Ave, Suite 613, Portland, OR 97204

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NE 13th Ave and South Shore Rd Pipe Replacement Project

Updated October 29, 2020Sign up for emails

The City of Portland’s Bureau of Environmental Services is continuing our work to repair and replace critical sewer and stormwater infrastructure. Environmental Services will continue to provide information and updates on construction schedules and activities during the COVID-19 emergency. 

Environmental Services – your sewer and stormwater utility – is coordinating with the Peninsula Drainage District #2 (PEN2) to design a project to replace approximately 300 feet of storm pipe on NE 13th Avenue at NE South Shore Road. The existing pipe is blocked at several locations and has backed up water into the neighborhood. This storm pipe replacement will increase system capacity and relieve neighborhood flooding.

map of NE 13th and South Shore project


This project is in the design phase. Construction is anticipated to begin in the fall of 2021. A detailed timeline and other project information will be posted online when it becomes available.


A pipe connecting a ditch located to the north of NE South Shore Road has been clogged for many years. This pipe drains to the NE 13th Avenue drainage system, which consists of roadway ditches and driveway culverts. The clogged pipe has resulted in flooding of private properties in the vicinity of the pipe. On behalf of PEN2, Multnomah County Drainage District #1 (MCDD) conducted temporary pumping into the drainage system between NE South Shore and Faloma roads beginning in the winter of 2015 through spring of 2018.

MCDD and Environmental Services staff identified the blockage as a large tree root and broken pipe. The pipe is also undersized, and the elevated pipe entrance creates ponding conditions. MCDD and Environmental Services are now coordinating efforts to replace the pipe. The current location is not feasible due to the tree roots, which is why the proposed design is adjacent to the existing pipe.

For More Information 

We will be sending periodic project email updates on the project progress. To receive updates, please email with “NE 13th South Shore” in the subject line. You can also call Debbie at 503-823-2831.

The Multnomah County Drainage District (MCDD) serves three drainage districts along the south shore of the Columbia River: Peninsula Drainage District #1 (PEN1), Peninsula Drainage District #2 (PEN2), and the Sandy Drainage Improvement Company (SDIC). The four districts collectively extend from the edge of Smith and Bybee Lakes on the west, to the Sandy River on the east and operate through intergovernmental agreements. For more information, please visit