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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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Taggart Sewer Outfall Repair

Updated July 28, 2017Button. Click to sign up for email updates

Schedule

Sewer repairs are anticipated to occur between May and October of 2018 and 2019. Construction activities will be concentrated at existing manhole access locations along the Taggart Outfall. Work zones will move as project segments are completed.

Proposed 24/7 Schedule

The Outfall will be repaired using construction methods that can be completed from inside the sewer line and will require minimal work aboveground in the roadway.

Crews can safely work in the Outfall pipes only on dry days when there will be no flow in the pipes from rain or other parts of the sewer system. Work at each manhole west of the light rail tracks may last several months, while work on manholes in SE 16th Avenue and in SE Tibbetts Street should be less than a month at each location. Crews may be working at multiple locations at the same time.

To take advantage of Portland's dry season to complete these urgent repairs, Environmental Services is proposing to work all hours and all days in the industrial area between SE Grand Avenue and SE 16th Avenue adjacent to light rail. Work in the other, more residential areas will be completed during regular daytime construction hours from 7 a.m. to 6 p.m. Monday through Friday, and Saturday if needed.

Taggart Outfall project map

Sources of Noise

The primary construction method to repair the Taggart Outfall will be Tunnel Liner Plate. Of all the construction methods Environmental Services analyzed, this method will most effectively reinforce the Outfall pipe and cause the least impact and disruption to the neighborhood. This method will minimize traffic impacts and noise. All access to the sewer will be through existing manholes with no excavation required.

The vast majority of construction time will be the installation of the tunnel liner plate. The liner plate will be delivered to the access points on flatbed trucks and off loaded using fork lifts. The liner plate will then be lowered into manholes and assembled underground in the sewer. In some areas, vactor trucks may be used to remove sediment from sewer prior to installation of the liner plate; however, there is a very limited amount of sediment in the sewer. This activity will be limited in duration.

Once the liner plate is installed in each section, the space between the brick sewer and the liner plate will be grouted; this operation will be of short duration and take significantly less time than the installation of the liner plate. Grout pumps located on the surface near the access manholes will pump the grout into the sewer.

Once sections of grouted liner plate are completed, cementitious material will be installed on the inside face of the liner plate in the industrial area only. Cement pumps will be located on the surface by the access manholes. This is a short duration activity. Generators on the surface, near the access manholes, will be required for the pumps and other equipment used in construction. All generators and compressors will be silenced.

Noise Mitigation Measures

The major sources of noise will be the grout pumps, generators, and unloading of the liner plates. The contractor will be required, by contract, to use quiet generators. The other major source of noise will be the delivery and unloading of the liner plate. Mitigation measures are incorporated into the construction contract. These mitigation measures are the following:

  • Night and weekend work is only proposed for industrial areas where there are no residences within 200 feet.
  • All compressors and generators will be silenced.  Noise levels for quiet generators are around 69 dBa. 
  • Backup alarms on all trucks will be turned off and spotters will be used instead.
  • Vactor truck use and any required saw-cutting will not be allowed from 10 p.m.-7 a.m.
  • Lighting will be adjusted to the lowest levels to limit overshooting the work site and impacts to the immediate community.
  • City inspectors will be on site during work hours to enforce contract restrictions on noise.

Submit Comments to Portland Noise Office

Portland noise code allows construction from 7 a.m. to 6 p.m. Monday through Saturday. Work after 6 p.m. and before 7 a.m. and all hours on Sundays requires a Noise Variance from the Portland Noise Office. Because construction crews will work days, nights, and weekends in the industrial area between SE Grand Avenue and SE 16th Avenue adjacent to light rail, Environmental Services will apply for a Noise Variance.

Equipment that generates noise may include flatbed trucks, generators, concrete trucks, and grout pumps. Noise will most commonly result from unloading steel plates from trucks, running generators required for ventilation and other equipment, and running grout pumps. Night work will also require lighting of the area.

Your comments regarding the proposed 24/7 schedule are valuable and you can submit them to the Portland Noise office by letter or email. Please submit your comments by June 19 to:

Portland Noise Office
1221 SW 4th Avenue, Suite 110
Portland, OR 97204
Email: noise@portlandoregon.gov

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:

Cheryl Kuck
Community Outreach
Phone: 503-823-7898
Email: Cheryl.Kuck@portlandoregon.gov

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 (Taggart Outfall) in your voicemail and email so we can provide you more details about what to expect in front of your property. Also, please write "Taggart" in the subject line of your email. Click SIGN UP! to sign up for periodic email updates.


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