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NE Flanders and 66th Sewer Extension Project

Construction type
Sewer and Stormwater
Project status

Environmental Services will begin construction on a project to extend the public sewer system on NE Flanders Street between NE 66th and NE 67th avenues. This work will provide service to properties currently served by a nonconforming sewer an independent and direct connection to the public sewer.

Construction is scheduled to start January 2021 and will take about two months to complete. Properties near construction will receive a door notice from the contractor 5-10 days before construction starts.

Project Area

The project is located on NE Flanders Street between NE 66th and NE 67th avenues. 

What's Happening Now

Work crews will periodically be in the area to perform pre-construction activities. Activities include site visits and evaluation, survey, utility locates, and tree trimming. 

Some investigative activities will require restricting parking and closing travel lanes. The traveling public should expect minor traffic delays. 

We Want to Hear from You

Environmental Services will inform residents about project activities and respond to questions and concerns in a timely manner.   

Sewer Emergency: In the event of a sewer backup or basement flooding, call the Maintenance hotline immediately at 503-823-1700. It is staffed all hours and all days, 24/7.  

Construction Methods

Crews will use Open Trench Excavation to complete all work. Open Trench Excavation is the traditional method of sewer construction and the most common method for replacing a sewer pipe, especially if the original pipe needs to be upsized. 

Open trench excavation consists of digging down to and exposing the existing pipe, removing the existing pipe or a section of it, installing a new pipe or a section of new pipe, and then backfilling the trench. 

The work includes the following steps: 

  • Sawcut pavement and dig trench to install mainline sewer pipe 

  • Sawcut pavement and dig trenches from the mainline to the curb to install sewer service laterals that connect properties to the public sewer 

  • Install new mainline sewer pipes and laterals 

  • Cover open trenches with steel plates at the end of each day as needed while work is in progress 

  • Backfill trenches with sand or gravel and apply temporary asphalt patches 

  • Conduct quality control inspections 

  • Complete permanent pavement restoration of patched trenches after work passes inspections 

  • Repair any curb and sidewalk panels damaged during construction  

  • Restore any vegetation disturbed during construction with top soil and grass seed 

What to Expect

You can expect the following activities and impacts during construction: 

Safe Work Site: Safety is our top priority for every construction site. Stay clear of all construction activities and keeping children, pets and vehicles out of construction areas. 

Maintained Service: All utilities will remain in service during construction. 

Noise, Vibration, and Dust: Construction creates noise, vibration and dust and disrupts normal neighborhood activity. 

Local Access: The contractor will maintain local access to all properties, but construction may impact normal use of your driveway or entrance to your business. Please observe traffic control signs and follow the directions of flaggers. 

Parking Restrictions: On‐street parking will be restricted in and near the work zones to create a safe work environment and to stage equipment and materials. 

Equipment Storage: Some equipment and materials will be stored on your street or nearby streets overnight. 

Typical Work Hours: Typical work hours are 7:00 a.m. to 6:00 p.m. Monday through Friday, but the contractor may schedule work during the same hours on Saturdays. 

Schedule Changes and Inactivity: Schedules may change, and you may see periods of inactivity during construction due to a variety of factors, including conditions underground, weather, traffic impacts, subcontractor schedules, and availability of materials.

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