Environmental Services is designing a project to repair about 3,700 feet of the 110-year-old brick Taggart Outfall sewer so that it can operate for another hundred years. The sewer pipes are showing signs of cracks, fractures, missing brick and mortar, and obstructions in the pipe, putting the Outfall at risk of structural failure. This project will allow the Taggart Outfall sewer to properly perform its role in protecting public health, water quality and the environment.
The Taggart Outfall is a large-diameter and deep sewer pipe. It is between 5 to 10 feet wide and 23 to 64 feet below the surface. Safety requires that crews will only be able to work in the Outfall pipes on days when there will be no flow from either rain or other parts of the sewer system.
Sewer repairs are anticipated to occur between May and October of 2018 and 2019. The project will likely require two construction seasons because crews can safely work in the Outfall pipes only on dry days.
Potential Traffic Impacts
Accessing the sewer line through manholes will require lane closures, which will require traffic control and construction signage. When lanes are closed in a work zone, they will be closed 24/7 for the duration of construction in that area, including at night and on weekends. Where needed, traffic will be routed around the work zones.
Traffic controls will be implemented at the following locations:
- Traffic restrictions along SE 10th Avenue from SE Gideon to SE Woodward
- Pedestrian and cycling detours near the "Clinton Triangle" - along SE Gideon between SE 13th-16th
- Minor traffic restrictions for a day or two at SE Milwaukie and SE Woodward
- Traffic restrictions for short periods of time near SE 16th and SE Pershing, SE 16th and SE Center, and SE Tibbetts and SE 19th.