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Environmental Services

working for clean rivers

Phone: 503-823-7740

Fax: 503-823-6995

1120 SW 5th Avenue, Room 1000, Portland, OR 97204

Piedmont Sewer Repair Project

JULY 2014

Environmental Services is designing three large-scale sewer projects in North and Northeast Portland neighborhoods to replace or repair approximately 53,300 feet of public sewer pipes that are on average 90 years old and failing due to age. That is the equivalent of 10 miles of sewer pipes. The three adjacent project areas will include construction in Piedmont, Humboldt, Woodlawn and King neighborhoods plus a few blocks in Overlook.

In the Piedmont neighborhood, the work will include installing about 8,300 feet of sewer pipes on about 50 city blocks throughout the neighborhood. This project will enhance livability by improving sewer and stormwater infrastructure, increasing sewer capacity, and reducing the risks of street flooding and sewage releases to homes, businesses and streets. Construction is anticipated to begin in June 2015.

Survey Work

During the first few weeks of August, survey crews will be working on the sidewalks and streets in front of several properties in the Piedmont neighobrhood, measuring the elevation of first floors and looking at houses to see if they can see a basement. Survey crews will work in the public right-of-way using non-invasive methods and equipment. They will not need to enter private property. 

This analysis will help design engineers determine if the proposed sewer lines will be able to handle the amount of sewage generated from the homes on that particular street. This information will help us design a system to reduce the chance of basement sewer backups.

Other Work in the Area

For approximately the next two to three months, work crews will be drilling holes in street pavement and taking soil samples at several locations in Piedmont, Humboldt, Woodlawn and King neighborhoods plus a few blocks in Overlook. This will help the design engineers understand conditions that construction crews may encounter. What the engineers learn from analysis of soil, rock and pavement samples will help them determine construction methods.

Before drilling starts, crews will be in the neighborhood to locate and mark underground utilities by painting stripes on streets and sidewalks or placing colored flags in landscaped areas. Each color indicates what is buried below.

Piedmont soil sampling locations

In addition to soil sampling crews, trucks will be in the neighborhood with video equipment to inspect the interior of public sewer pipes.

Project Area

The general project boundaries and pipe locations proposed for repair or replacement are illustrated in the map below.

It is too early in the process to identify what types of construction methods will be used where.

Piedmont project area map

For More Information

Contact Rhetta Drennan at 503-823-6006. During construction, we will be sending regular email updates to keep you posted about the schedule, construction activities, possible traffic detours and delays, parking restrictions and other impacts. We encourage you to sign up now to be added to the project's email update list.

Send an email to Rhetta Drennan with “Piedmont” in the subject line to receive project updates by email. Please let us know if you have concerns such as business operations, disability issues or medical or business deliveries. Thank you for your cooperation during this important sewer repair project.