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The City of Portland, Oregon

Portland Water Bureau

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Conduit 2 Gets a Facelift

Portland Water Bureau employees at the Sandy River Station (SRS) recently completed a repair project on Conduit 2. Conduit 2 travels 26 miles from the Bull Run Watershed to the Powell Butte Reservoirs.

Pipe wrapping 
Specified by the Engineering Services Group, the fiberglass pipe wrap will halt the corrosion and form a protective layer around the pipe. This was the first pipe wrap installation of its kind performed by the Water Bureau and may be used in the future on other sections of conduit. 

At one point along the way, the pipe runs a short distance above ground and across a creek. This section of the pipe is protected by a culvert that channels the creek away from the conduit. Upon inspection, the conduit was observed to be in extremely poor shape due to corrosion. In addition, the existing culvert was undersized and had rotted away.

Installation of new culvert 
A new culvert was installed to protect the conduit.

To address these challenges, the 44-inch conduit was excavated. The SRS crew and painters then worked together to install a fiberglass pipe wrap around the conduit.

Buried conduit and restoration nearing completion. 
Buried conduit and restoration nearing completion.

The pipe was finally buried and the site restored with native vegetation. The entire project was completed in an efficient four weeks.

More About Conduit 2
Conduit 2 was built in 1911. It is a lock bar steel pipe with riveted joint. The diameter of the conduit ranges from 44- to 52-inches, and has the capacity to deliver 50 million gallons per day to customers.


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