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N Mississippi Urgent Sewer Capacity Improvement Project

Construction type
Sewer and Stormwater
Project status

Environmental Services is constructing a project to reconstruct the public sewer system in N Mississippi Avenue between N Shaver and N Fremont streets. Sewer and stormwater improvements will increase capacity of the 100-year-old sewer, relieve sewer backups, and reduce street flooding.

Construction started in January 2021. The project is estimated to take about five months to complete. This schedule may fluctuate due to weather and the ongoing COVID-19 restrictions.

Project Area

The map below illustrates where this project is constructing sewer improvements. The primary construction method for each pipe segment is noted. 

What's Happening Now

Construction Schedule

The look-ahead schedule is approximate, and the dates of activities may change due to weather, conditions underground, subcontractor schedules, materials and labor availability, and other factors.

Week of February 22 activities include:

  • Prepare for and pipe burst the main sewer line in N Mississippi Avenue between N Beech and N Failing streets.
  • Pipe bursting the main sewer line in N Mississippi between N Beech and N Failing.
  • Repair or replace sewer lateral connections in N Mississippi Avenue between N Beech and N Failing streets.
  • Install a new manhole at the intersection of N Shaver Street and N Michigan Alley.

Week of March 1 activities include:

  • Continue to repair or replace sewer lateral connections in N Mississippi Avenue between N Beech and N Failing streets.
  • Install new main line sewer in N Shaver Street between N Missouri Ave Alley and N Michigan Ave Alley. This will be open trench pipe repair work.
  • Install a new manhole at the intersection of N Shaver Street and N Missouri Avenue.
  • Install new manhole at the intersection of N Mississippi Avenue and N Beech Street.

Healthy Business Permits

Environmental Services is coordinating efforts with PBOT’s Healthy Businesses Program. The current Healthy Business permits in the project area will expire January 4, 2021, so please be sure to have items removed from the street by that time. There will be 5-minute pickup/drop-off zones on the side streets, but not along N Mississippi within the project area. Sidewalks will remain open for pedestrians. If you have questions or need information regarding the Healthy Business Program, email pbotbusinesstoolkit@portlandoregon.gov

On-Street Parking

The city’s contractor for this project has posted NO PARKING signs in and around areas where crews are working and staging equipment and materials. Please do not move or alter in any way the signs and barricades. While we understand that on-street parking is limited in the neighborhood and temporary removal of spaces is inconvenient, the spaces are necessary for crews to do their work. Moving their approved signs can create safety hazards and having to replace them delays their work.

Some spaces may be signed NO PARKING during daytime construction and open up at night. You may park your car in these spaces overnight during non-construction hours as long as you move your car by 7 a.m. and return it at 6 p.m. Monday through Saturday.

On days when crews will be working in front of your house, nearby, or where you park your vehicle on the street, please plan ahead. Plan to move your vehicle off the street by 7 a.m. and return it at 6 p.m. Monday through Saturday.

Additional Sewer Work

Two new sections of pipe will be installed to the west of N Mississippi Ave. Approximately 217 feet of new sewer pipe will be installed in N Shaver between N Michigan Ave Alley and N Missouri Ave Alley, and approximately 183 feet of new sewer pipe will be installed in N Failing St between N Mississippi Ave to N Michigan Ave. These two new sewer lines are a part of a separate contract and will likely be installed towards the end of the N Mississippi work by the same contractor. Information about construction and schedules will be provided with the N Mississippi Project updates.

Construction Methods

Two different methods of construction will be used in this project—Open Trench and Pipe Bursting. Some sewer connections will be made using a trenchless technology.  

What to Expect

You can expect the following activities and impacts during construction:  

  • Noise, Vibration, and Dust: Construction creates noise, vibration, and dust. 

  • Typical Work Hours: Typical work hours are 7:00 a.m. to 6:00 p.m. Monday through Friday, and Saturdays if needed. 

  • Schedule Changes and Inactivity: Construction schedules can change due to a variety of factors, including conditions underground, weather, traffic impacts, subcontractor schedules and availability of materials. These same variables may cause periods of inactivity during construction phases.  

  • Traffic Delays: You should expect traffic delays in and near the work area. Please observe traffic control devices and signs. The contractor will develop detailed traffic control plans for each location. 

  • Parking Restrictions: On-street parking will be restricted in and near the work zones to create a safe work environment.  

  • Equipment Storage: Some equipment and materials may be stored overnight on your street, nearby streets, or other public right-of-way areas.

Sign Up for Updates

Sign up for regular updates at N Mississippi Urgent Sewer Capacity Project.

Please Take the Business Survey

Fill out a survey about your business so we can minimize impacts to your business. www.portlandoregon.gov/bes/business.