The Portland Water Bureau and contractor Hoffman Construction Company have officially begun a long-term capital improvement project to update the Washington Park reservoir site at 2403 SW Jefferson Street. The project complies with federal and state mandates, seismically strengthens key water infrastructure on Portland’s west side, and helps ensure a healthy, resilient, and secure water system.
A new 12.4 million gallon, seismically reinforced below ground reservoir will be constructed with a reflecting pool/water feature on top. The new reservoir will preserve the historic drinking water function provided by the original reservoirs and be engineered to withstand ongoing landslide encroachment and potentially catastrophic effects of a major earthquake. Existing Reservoir 4 will be disconnected from the public drinking water system and a lowland wildlife habitat area, bioswale, and reflecting pool will be constructed in the basin.
When complete and online, the new reservoir will supply water to Portland’s west side and serve more than 360,000 people. This will include all downtown businesses and residents, 20 schools, three hospital complexes, more than 60 parks, and the Oregon Zoo.
Construction will proceed through 2019. A pause will occur from 2020 to 2022 to allow soils to consolidate to reduce any vertical movement. From 2022 to 2024, construction of interpretive features, including the two reflecting pools and surface features, will conclude the project.
PROJECT WORK & IMPACTS
July - Mid-September 2016
From now until mid-September 2016, the following construction activity is scheduled to occur.
This activity will cause impacts to traffic, parking, and TriMet bus service.
See chart below and access an online map detailing traffic impacts and entrances into and exits out of Washington Park during this period.
|**Construction-related traffic impacts are subject to change. To avoid traffic delays through the area, plan ahead and consider alternate routes to get to your destination.|
|PARK ENTRANCES||PARK EXITS|
|From now until mid-September 2016, all park entrances and exits will remain open.|
FIVE-MONTH LOOK AHEAD
|Cut and Cap Piping||Within project site||X|
|Tree Pruning / Inspection||Within project site||X||X|
|Construction Fence Installation||Within project site||X|
|Vegetation/ Tree Removal||Around the reservoirs, by SW Sacajawea and Sherwood boulevards||X|
|Erosion Control||Within project site||X|
|Disconnect Reservoir 3 Inlet and Outlet Piping||Within project site||X|
|Remove Weir Building||Within project site||X||X|
|Disconnect Reservoir 4 Inlet and Outlet Piping||Within project site||X||X|
|Removal of Stilling Tank inside Gatehouse 4||Within project site||X||X|
|Selective Site Demolition||Within project site||X||X|
|Construct Upper and Lower Shoring Walls||Within project site||X||X||X|
KEEPING YOU UP-TO-DATE
The Water Bureau will be presenting project updates at upcoming local neighborhood association meetings. Join us to learn more about the project.
- September 12, 2016, 6 - 7:30 p.m.: Arlington Heights Neighborhood Association
- September 13, 2016, 7 - 8:30 p.m.: Sylvan Highlands Neighborhood Association
- September 15, 2016, 7 - 9 p.m.: Goose Hollow Neighborhood Association
To contact us with questions or concerns or to sign up to receive project updates by e-mail: