Environmental Services is designing a project to repair approximately 6,800 linear feet, over one mile, of public sewer pipes in downtown Portland. These pipes are 50 to 140 years old, in deteriorating condition, and are showing signs of cracks, breaks, holes, offset pipe connections, and root and grease obstructions. The project will also repair or replace 29 manholes. These improvements will protect the public and the environment by reducing the possibility of sewage releases to buildings and streets.
The Project is in the Portland State University (PSU) area and is generally bounded by SW Mill Street to the north, I-405 to the south and west, and SW Harbor Drive to the east. The project also includes work on W Burnside and SW Columbia streets.
Pre-construction activities are anticipated to begin in February or March of 2019. Major pipe repairs will follow in the spring when weather is more conducive to pipe lining work. The project is expected to take about a year to complete.
Approved Night Work
Regular work hours will be 7 a.m. to 6 p.m. Monday through Friday, and Saturdays as needed. To reduce public impacts and complete the work as quickly as possible, Environmental Services will work both days and nights. Work at each location will take less than a week, including up to three nights to complete the pipe lining sewer repair work.
Equipment that generates noise will include sewer cleaning trucks, compressors, light trucks, generators, pumps, and ventilation fans. Night work will require lighting of the work zone.
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 require a noise variance from the Portland Noise Office. Environmental Services applied for, and the Portland Noise Office granted, a noise variance to enable the city’s contractors to work both days and nights.
This project will include both trenchless and trench excavation construction methods:
- Cured-in-Place-Pipe Lining (CIPP) to repair the main line sewer pipes
- Sawcutting and jackhammering to install cleanouts in some locations
- Digging trenches to replace some sewer service lateral connections to buildings