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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

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N Amherst Street Project


N Amherst project map


N Amherst Street Sewer Repair

Construction Starting

October 21, 2014

CONTACT:    Joseph Annett, 503-823-2934,

Environmental Services will soon begin construction on a project in your neighborhood to repair about 20,000 feet of deteriorating sewer pipes that are failing due to age. There will be construction at multiple sites in southwest, north, northeast and southeast Portland. The work will include repairing or replacing the public sewer main, manholes, storm drains, and sewer service laterals to the curb.

This project will protect public health and the environment by reducing the possibility of costly breaks, leaks, blockages and sewage releases to the streets.

The city’s contractor will make most of the repairs using cured-in-place pipe lining (CIPP) and open trench excavation. CIPP involves inserting a flexible resin liner that adheres to the inside of the pipe. Hot water or steam circulated through the pipe hardens the liner and gives the pipe a new interior surface. Workers access the pipe from the surface through a manhole, which reduces the need for excavation and minimizes surface disruption. The contractor will excavate trenches to replace lateral connections to homes, manholes and storm drains.

Construction Schedule

The work at your location is tentatively scheduled for the week of October 27th and will consist of the following phases.

  • Jet cleaning of the sewer main
  • Video recording and inspection of the sewer main
  • Repairs to the sewer main or manhole that are required prior to lining
  • Cured in place pipe lining process
  • Routing of lateral connection to sewer mains
  • Lateral repair to the curb as needed
  • Restoration

There may be periods of inactivity during these phases.

What to Expect During Construction

  • Construction crews will do most of the sewer lining work through manholes in streets.
  • Typical work hours will be 7:00 a.m. to 6:00 p.m. Monday through Friday. The contractor can also choose to work on Saturdays if necessary.
  • We will notify residents in advance of night work at some locations.
  • Roads will be closed to through traffic, but local residents will have access from one direction. You may experience delays.
  • If work is right at your driveway and you have to use your vehicle, you will need to move it before the work starts.
  • The contractor will repair most of the pipe using cured-in-place pipe lining. Go to for more information.
  • Preparation and restoration will take a couple of days to complete but the pipe lining process should only take one day at each location.
  • You may notice an odor during the pipe lining process but it will dissipate quickly.
  • On-street parking in or near the work area will be prohibited during work hours.
  • Equipment and materials may be stored on nearby streets overnight.
  • A city construction inspector will be on-site during work hours, and may be able to assist you with construction concerns. Inspectors typically wear a green City of Portland safety vest and hard hat.
  • Let us know if you have concerns such as business operations, disability issues or medical deliveries.

Go to for more project information and to sign up to receive project updates by email.


The City of Portland complies with all non-discrimination laws including Title VI (Civil Rights) and Title II (ADA). To request a translation, accommodation or additional information, please call 503-823-7740, or use City TTY 503-823-6868, or Oregon Relay Service: 711