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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

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Montavilla South Sewer Repair

Montavilla South Sewer Repair Project Update: January 17, 2019

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Environmental Services has started construction on the Montavilla South Sewer Repair Project to repair or replace about 5,765 feet (over one mile) of 90-year-old public sewer pipes in the Montavilla Neighborhood, south of Stark Street, that are deteriorating due to age. The project will also install 11 new manholes, repair 38 manholes, and replace 78 public sewer connections to private properties. This investment in your neighborhood will ensure continued dependable sewer service and protect the public and our environment by reducing the possibility of sewage releases to homes, businesses, and streets. Construction will have several phases and is anticipated to be completed in summer 2019.


The map below shows the pipe work locations and construction methods for Montavilla South.

Map of Montavilla South Sewer Repair Project


The construction contractor for Montavilla South will be J.W. Fowler. Construction is anticipated to begin in October 2018 and to be completed in summer 2019.

  • Construction started in October and is anticipated to finish in 10 months. Work hours are 7 a.m. to 6 p.m., Monday-Friday.
  • Prior to construction starting, there will be activity in the neighborhood.  Crews will be in the area to videotape inspect, and clean sewer lines, mark utility locations on the street and sidewalks, trim trees and install tree protection and install erosion control measures. Some equipment and supplies may also be moved in to the area.
  • Schedule changes and inactivity during construction phases can occur due to a variety of factors, including conditions underground, weather, traffic impacts, subcontractor schedules and availability of materials.

Another project in the Montavilla Neighborhood, north of Stark Street, will also be in construction. The two projects will be constructed separately by two different contractors. For more information about the Montavilla North project, click here.

Construction work from:

January 17 – January 25:

  • SE 72nd Avenue and SE Salmon Street – Construct sewer mainline, connect manhole to mainline, install public lateral lines
  • SE 78th Avenue and SE Yamhill Street – Mobilize to project site, construct manhole, construct mainline sewer
  • SE 80th Avenue and SE Morrison Street – Construct sewer main line, connect manhole to mainline, install public lateral lines, construct manhole steps

Tentative Scheduled Work

  • SE 73rd Avenue and SE Main Street – Mobilize to project site, construct sewer main line and install public lateral line

Work Hours

The typical work hours for Montavilla South will be 7 a.m. to 6 p.m. Monday through Friday. If needed, the contractor can work the same hours on Saturday.

Environmental Services applied for and was granted a noise variance by the Portland Noise Office to allow nighttime construction on SE Mill Street between SE 80th and 82nd avenues. However, that sewer repair will be completed as part of a street improvement project to be constructed by the Portland Bureau of Transportation at a future date, tentatively scheduled for 2020.

Pre-Construction ActivitiesSurvey utility markings

This week and the following weeks, crews may be in the neighborhood preparing for construction:

  • Pipe and manhole inspections to verify conditions, which may potentially change construction methods at some locations
  • Tree trimming to protect trees from large equipment
  • Equipment staging and traffic control setup to secure safe work zones
  • Street pavement inspections to document pre-existing conditions
  • Utility locates to identify underground utilities
  • Erosion control
  • Potentially some equipment and supplies arriving in some areas

These activities typically occur over time, rather than all at once. To learn more and see photos, click here.

Construction Methods

The city's contractor may use several different methods of construction to replace or repair sewer pipes. This project will include cured-in-place-pipe lining (CIPP) and open trench excavation. After the contractor inspects the pipes to determine existing conditions, they may decide to change construction methods or even use another method, like pipebursting, at some locations.

The project also includes replacing some manholes, storm drains, and sewer service laterals that connect homes and businesses to the public sewer from the sewer main line in the street to the curb.

To learn more about sewer construction methods and to view photos, click here.  

What to Expect during Construction

For more information about what to expect during construction, click here.

For More Information

If you would like more information about the project or have questions and concerns you’d like to discuss, please call or email:

Stefanus Gunawan
Community Outreach
Phone: 503-823-5759

If you have a concern or question about a pipe repair near you, please be sure to include your name, property address and project name (Montavilla South) in your voicemail and email so we can provide you more details about what to expect in front of your property. Also, please write "Montavilla South" in the subject line of your email. Click SIGN UP to sign up for periodic email updates about the schedule, construction activities, possible traffic detours and delays, parking restrictions, and other impacts.

Project Overview

Including the project description, map and schedule

Community Outreach

Check out upcoming public meetings, and current and previous communications about the project