Environmental Services is designing a project to repair about 800 feet of public sewer pipes in downtown Portland that are 100 to 140 years old and in deteriorating condition. The sewer pipes are showing signs of cracks, breaks, holes, offset pipe connections, and obstructions, putting the pipes at risk of structural failure. Urgent repairs at three locations shown on the map below will protect the public and the environment by reducing the possibility of sewage releases to buildings and streets.
Construction is currently expected to occur between January and June 2018. The timeline is subject to change due to weather, availability of materials, subcontractor schedules, and other circumstances.
Repairs will be made in three locations (see map). The project will include both trench excavation and trenchless construction methods. The main line sewer pipes will be lined. The spot repair in SW Oak Street will require digging a pit to relocate a water line and replace a section of the sewer pipe.
Over the next several months, you may notice crews in the neighborhood. They are gathering information to define repair locations, select construction methods, and minimize construction impacts on businesses, residents, and visitors to downtown Portland. Preparation for next year's construction will require survey and video inspection work from manholes that access the sewer pipes in the street. You may also see temporary paint markings on the pavement to indicate the locations of pipes and other underground utilities.