Skip to Main Content View Text-Only

The City of Portland, Oregon

Environmental Services

working for clean rivers

Phone: 503-823-7740

Fax: 503-823-6995

MAILING ADDRESS: 1120 SW 5th Ave, Room 1000, Portland, OR 97204

More Contact Info

Project Overview

Construction Begins January 2018

Environmental Services - the City’s sewer and stormwater utility - is designing a public sewer project that will abandon 720 feet of large diameter pipe built in 1902, replace one line (about 200 feet of pipe) that is deteriorating due to age, and build two new lines (about 200 feet of pipe) that will extend the existing sewer system (see map). The project will be constructed in two phase, first the abandonment of the 1902 line, followed by the repair and construction work. This project will help protect public health, water quality, and our environment.

Map of the Davinci Sewer Project Area

Project Overview

In 1902 the city installed 720 feet of 22-inch vitrified clay pipe under NE Couch Street between 24th and 26th avenues and between the DaVinci School and Coca Cola plant. In 1920 that pipe was abandoned according to existing standards. Over the last few years Environmental Services has noticed that this pipe is failing and causing ground cavities to develop. During the first phase of construction (2-3 weeks), crews will prep the site, fill the pipe with grout and let it harden. This process will meet current standards for abandoning a line and will eliminate the development of cavities that can cause sink holes. 

The second phase of construction will involve replacing about 200 feet of existing sewer line under NE Everett Street between 26th and 27th avenues. This line was built in 1901 and is deteriorating. Replacement methods are still to be determined.

Also in the second phase, two new pipes will be install to extend the sewer system by about 200 feet, where there has been no direct service available. Theses line will allow adjacent properties to access service without crossing into neighboring properties, and will provide more reliable service. These pipes will be installed in NE 28th and 29th avenues between Davis and Everett streets. Construction of these lines will require open trenching of the streets.

Construction of this project will take about six months.

Thank you for your cooperation during this project. Please let us know if you have questions or concerns about issues such as effects on business operations, impacts on medical or business deliveries, if you need help with access for people with disabilities, or any other concerns. We appreciate your communication and want to hear from you.