Environmental Services is designing and constructing a sewer improvement project to repair or replace 3,000 feet of aging public sewer pipes that are in deteriorating condition. These pipes were originally part of the Hollywood-Grant Park Sewer Repair Project but were removed from that project due to the complexity of work in sewer easements on private properties. They have now been added to the Montavilla North Sewer Repair Project, which is currently in construction. The project also includes repair and construction of manholes, sewer access cleanouts, and 196 feet of sewer service laterals. This work on private properties is being referred to as Hollywood-Grant Park Phase 2. These improvements will protect public health and the environment by reducing the possibility of sewage releases to buildings and streets.
The City's contractor for the Montavilla North Sewer Repair Project, Landis & Landis Construction, will complete the public sewer repair and reconstruction work for the Hollywood-Grant Park Phase 2 Sewer Repair Project.
This project will repair or reconstruct public sewer pipes, manholes, cleanouts, and sewer service laterals at locations illustrated on the map below.
Construction on private properties adjacent to public sewer easements in the Hollywood-Grant Park Phase 2 Sewer Repair Project is being coordinated with the larger Montavilla North Sewer Repair Project schedule.
General daytime work hours will be 7 a.m. to 6 p.m., Monday through Friday, and Saturday if needed.
The Portland Noise Office granted Environmental Services a noise variance to enable crews to work both days and nights at some locations in this project. Where the sewer pipe to be repaired is several hundred feet long and in shallow ground, the pipe lining process to repair the pipe will take a full day and the curing process to harden the liner inside the pipe will last until midnight or later. Environmental Services and the construction contractor will notify properties in advance of scheduled night work.
The contractor will use a combination of trenchless and open trench excavation methods to repair and replace public sewer pipes, manholes, cleanouts, and sewer service laterals. The methods will vary from property to property depending on many factors, including pipe conditions, soil types, slope, access challenges, and other factors.
For sewer boring work to replace service laterals, it will be necessary to dig a sending pit and a receiving pit to install the pipes. Crews will then drill a hole underground between the sending and receiving pits and install the new service laterals without disturbing the surface between the two points.
For CIPP lining repairs, crews will use manholes in the street and in between private properties to insert and inflate the lining. The pipe lining process should take one day at each location. Working from a manhole, crews will insert a flexible liner inside the old pipe. Crews then inflate the liner and use hot water, steam, or ultraviolet light to cure the liner, forming a rigid, smooth surface that seals cracks and restores the pipe to near-new condition. Crews will then reconnect sewer service laterals that provide sewer service to adjacent properties.
Open Trench Excavation
Crews will complete spot repairs using the Open Trench Excavation construction method. Crews will dig a trench to replace isolated segments of the mainline pipe that lining alone cannot adequately repair. Crews will then reconnect sewer service laterals that provide sewer service to adjacent properties. After sewer construction, crews will backfill the trenches and apply a new layer of topsoil and grass seed.
In locations requiring Pipebursting, it will be necessary to dig a sending pit and a receiving pit to install the sewer pipes. Crews will insert a bursting head into the pit to shatter the existing pipe and force pipe segments into the surrounding soil. Crews will then pull or push new pipe into place behind the bursting head. Crews will then reconnect sewer service laterals that provide sewer service to adjacent properties. After sewer construction, crews will backfill the pits and apply a new layer of topsoil and grass seed.
Sewer Cleanout Installation
Sewer cleanouts are capped openings above the public sewer line that enable crews to access and repair sewer connections to properties along the line. Cleanouts will be used to maintain sewer service during the Cured-In-Place-Pipe Lining process and to provide access for future sewer maintenance activities. Crews dig a small trench to install a sewer cleanout and restore the area after installation.
Pre-construction activities may occur throughout the project area to prepare other locations for sewer repair work at a future date. These activities may include locating sewer pipe connections, inspecting and cleaning sewer pipes, marking underground utilities, tree trimming, installing tree protection, installing erosion control measures, staging equipment and materials, and setting up traffic controls. More details are available online at www.portlandoregon.gov/bes/preconstruction.
What To Expect During Construction
You can expect the following activities and impacts during sewer repair work:
- Work Hours: From 7 a.m. to 6 p.m., Monday through Friday.
- Noise, Vibration, and Dust: Sewer equipment may cause noise, vibration, and dust.
- Traffic Delays: Expect traffic delays in and near the work area. If work is primarily on private property, please watch for large equipment entering and exiting neighborhood streets.
- On-Street Parking: Some on-street parking spaces may be temporarily unavailable during work hours.
- Equipment Storage: Equipment and materials may be stored on streets overnight.
- Services Maintained: Sewer, water, and other utilities are expected to remain in service during construction, but there may be restricted use during sewer repair work.
- Site Inspector: A City inspector will be onsite during active construction and may be able to assist you with an immediate need.
- Emergencies: In the event of a sewer emergency or backup, call the City Maintenance hotline at 503-823-1700; the hotline is staffed all days, all hours.