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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

More Contact Info

Noise Variance

Environmental Services has been granted a noise variance to allow open trench work and cured-in-place pipe lining at locations indicated on the maps below. A variance is required when work occurs outside normal construction hours, 7:00 a.m. to 6:00 p.m. Monday through Saturday. This includes work after 6:00 p.m. and before 7:00 a.m., and all hours on Sunday.

Work would take place for up to six weeks on NE Killingsworth Street at NE MLK Boulevard, up to six weeks on NE Alberta Street near N Vancouver Avenue, and one week on NE Rosa Parks Way between NE Garfield Avenue and NE MLK Boulevard.

night work area map

N Alberta night work map

Rosa Parks Way night work

Your comments regarding the night work can be submitted by letter or email to:

Portland Noise Office
1221 SW 4th Avenue
Portland, OR 97204

When contacting the Noise Office, please reference the Woodlawn-King Alleys Sewer Project or the Woodlawn-King Streets Sewer Project

Project Contact Information

If you have questions or concerns about these projects, contact Rhetta Drennan at 503-823-6006 or Rhetta will forward any noise-related comments to the Noise Office. To be added to the email update list for these projects email Rhetta with “WoKi Alleys” or “WoKi Streets” in the subject line.

Construction Methods

The city’s contractor will use open trench excavation, which will involve the following steps. There may be periods of inactivity between the steps. For more information on construction methods go to

  • Cut pavement for pipe installation
  • Remove pavement and other materials
  • Install new sewer pipe
  • Excavate and connect drains
  • Excavate and connect sewer branches to properties as needed
  • Backfill and compact trenches with sand or gravel
  • Install temporary pavement
  • Complete final paving and restoration

The equipment to be used at these locations will consist of a pavement saw, track hoe, front-end loader, dump trucks, bypass pumps, pavement roller, generators, and lights.

Cured-in-place pipe lining occurs between two manholes. At one, vehicle access is very limited to accommodate a refrigerator truck, generators, and lights with crews working. At the other manhole a small crew of one or two people with a set of lights and a small barricade. There is usually one day of prep leading up to the lining, and a day/night for the lining.