Sunnyside South Green Street and Sewer Project

Sewer and Stormwater
Active
Environmental Services is constructing a project that will install and upsize public sewer pipes, as well as construct green street planters, in the Sunnyside neighborhood. These improvements will increase sewer capacity, relieve sewer backups, and reduce street flooding.
Photo shows curb marker saying: Green street managing stormwater with maintenance hotline 503-823-1700.
Construction is ongoing and should be completed in the Sunnyside and Ladds Addition neighborhoods by spring of 2024.

Project Area

The map below illustrates where this project will construct sewer improvements and green street planters. This map also shows what methods of construction are proposed as well as where all of the new ADA ramps will be built.

Sunnyside South Sewer and Green Street Map with methods proposed

General Schedule 

This project will be constructed along with the Ladd’s Addition project nearby. Construction has begun in the Sunnyside neighborhood. Construction of both projects is expected to be completed in the spring of 2024. Learn more about the Ladd’s Addition Project.

What's Happening Now

Construction will temporarily restrict some travel lanes and sidewalk crossings in work zones, remove on-street parking, and create traffic delays.

Please obey all traffic control signs and follow the directions of flaggers. 

All work is weather-dependent and subject to change. 

Week of February 6:

Sewer construction will occur during work hours between 7 a.m. and 6 p.m., Monday through Friday at the following locations: 

  • Finish at SE Main St between SE 33rd and 34th avenues.
  • Start at SE 35th Ave between SE Main and Madison streets.

Start Green Street Planter construction at:

  • Southwest corner of SE 29th and Taylor (two planters and ADA ramp that have planters in the planting strip and curb extensions into the street).
  • Northwest, northeast, and southwest corners of SE 29th and Main (all three planters include ADA ramps and have curb extensions into the street. The planter on the southwest corner does not include the planting strip).
  • Northwest corner of SE 30th and Madison (planter includes ADA ramp and planter in the planting strip and curb extension into the street).

Week of February 13:

Sewer construction will occur during work hours between 7 a.m. and 6 p.m., Monday through Friday at the following locations: 

  • Finish at SE 35th Ave between SE Main and Madison streets.
  • Start at SE Main St east and west of SE 35th Ave.

Continue Green Street Planter construction at:

  • Southwest corner of SE 29th and Taylor (two planters and ADA ramp that have planters in the planting strip and curb extensions into the street).
  • Northwest, northeast, and southwest corners of SE 29th and Main (all three planters include ADA ramps and have curb extensions into the street. The planter on the southwest corner does not include the planting strip).
  • Northwest corner of SE 30th and Madison (planter includes ADA ramp and planter in the planting strip and curb extension into the street).

Green street planters are built in phases with periods of inactivity between each phase. Excavation will happen first, then the contractor will build forms and pour concrete. Once the concrete has set, crews will return to fill the planters with soil. Plants and trees will be installed later during the appropriate planting season for each species. Please note: The holes that will be excavated for each green street planter will look bigger than the finished product.

What to Expect During Construction

A brief guide on what you can expect during construction projects conducted by Environmental Services and their contractors can be found at Construction Impacts.

We Want to Hear from You

Please let us know if you have any questions regarding the sewer pipes or green street planters. Be sure to include your name, property address, and project name (Sunnyside 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 “Sunnyside South” in the subject line of your email.

Construction Methods

The city plans to use two different methods to construct this project:

  • Open trench excavation is the most traditional and most common method of sewer construction. This method consists of excavating down to and exposing the existing pipe (if there is one), so that it can be installed, repaired, or replaced. The trench is then backfilled and temporarily paved until the pipe is quality control tested.
  • Cured-in-Place Pipe Lining (CIPP) is a trenchless method of sewer construction. It requires little or no digging and significantly less time to complete than other sewer repair methods. CIPP involves inserting a flexible liner inside the existing pipe, inflating the liner, and exposing it to heat or ultraviolet light to “cure,” or harden the liner inside the pipe.

Learn more about construction methods.

Project Background

The purpose of this project is to relieve basement sewer backup risk, reduce street flooding, and overall risk to the large sewer trunk in the project area. To that end, this project will upsize or repair portions of the public sewer main line to increase its capacity to handle combined sewer and stormwater. It will also build green street planters that help slow, filter, and cleanse stormwater from the streets.   

The project is designed to accomplish the following sewer and stormwater improvements:  

  • Replace or repair 9,000 feet of public sewer mainline pipe, ranging in size from 8 inches to 21 inches in diameter. 

  • Construct or replace 228 sewer service laterals that connect private sewer lines to the public sewer in the street; this will involve 3,700 feet of lateral sewer pipe.  

  • Install almost 800 feet of pipe for stormdrains. 

  • Install or replace 137 stormdrains. 

  • Construct 25 green street planters. 

  • Construct or replace 137 manholes.

  • Construct 44 ADA ramps.

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