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.
ACTIVITY & IMPACTS
Mid-September 2016 - March 2018
Starting September 12, 2016 and lasting for 12 to 18 months (March 2018), the following construction activity will occur.
This 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.
SW Sacajawea Boulevard
SW Sherwood Boulevard
Traffic Flow Reversal
Multi-Use Shared Path
Intermittent Closures on Madison Ct. Trail
TriMet Bus Service
Park Attractions Open
**Pedestrian and cycle access only; no vehicles permitted on SW Sherwood Blvd.
|**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. The traffic plan spanning mid-September 2016 to March 2018 has been approved by the Portland Bureau of Transportation. Safety is our top priority. The Water Bureau will be conducting evaluations and adjusting traffic flow as conditions require. The Water Bureau will be working with Portland Parks & Recreation, Explore Washington Park, and neighborhood associations to gather on-the-ground feedback and determine if changes are necessary.|
|PARK ENTRANCES||PARK EXITS|
FIVE-MONTH LOOK AHEAD
|Tree Pruning / Inspection||Within project site, around the reservoirs, along SW Sacajawea Boulevard, SW Lewis Clark Way, & SW Madison Court||X|
|Construction Fence Installation||Within project site||X|
|Erosion Control||Within project site||X|
|Vegetation / Tree Removal||Around the reservoirs, by SW Sacajawea and Sherwood boulevards||X||X|
|Selective Site Demolition||Within project site||X||X|
|Remove Weir Building||Within project site||X|
|Disconnect Reservoir 4 Inlet and Outlet Piping||Within project site||X|
|Removal of Stilling Tank inside Gatehouse 4||Within project site||X|
|Construct Upper and Lower Shoring Walls||Within project site||X||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: