GENERAL INFORMATION: 503-823-7404
1120 SW Fifth Ave, Suite 600, Portland, OR 97204
In order to comply with federal and state mandates and ensure a healthy, resilient, and secure water system, the Portland Water Bureau and Oregon general contractor Hoffman Construction Company are moving forward with an eight-year capital improvement project to update the Washington Park reservoir site at 2403 SW Jefferson Street.
Currently, Washington Park’s open Reservoirs 3 (upper) and 4 (lower) occupy the site along with two gate houses, a weir building, three pump houses, a generator house, and associated underground piping. The reservoirs are part of an ingenious gravity‐fed drinking water system constructed more than 120 years ago in 1893 and 1894, respectively.
STRENGTHENING OUR WATER SYSTEM
The project entails building a new, seismically reinforced below ground reservoir. The reservoir will not only maintain the historic drinking water function provided by the original reservoirs, but will be engineered to withstand ongoing landslide encroachment and potentially catastrophic effects of a major earthquake and will feature a reflecting pool on top in the same general footprint as the historical Reservoir 3.
Reservoir 4 will be disconnected from the public drinking water system, and a lowland habitat area/bioswale and a reflecting pool will be constructed in the basin.
When complete and online, the new underground reservoir will supply water to Portland’s west side, including all downtown businesses and residents, the Oregon Zoo, more than 60 parks, six hospitals, and 20 Portland public schools.
Four major challenges are driving this project: aging facilities, seismic vulnerability, an ancient landslide, and the Long-Term Enhanced Surface Water Treatment Rule (LT2).
The project is part of the Water Bureau’s Capital Improvement Program and funded by revenue bond proceeds paid back with utility ratepayers’ fund.
The project is happening now in order to meet four key deadlines identified in the compliance schedule approved by the federal Environmental Protection Agency and enforced by the Oregon Health Authority:
AT-A-GLANCE: APRIL - AUGUST 2016
|Tree Pruning / Inspection||Within project site, around the reservoirs, along SW Sacajawea Blvd, SW Lewis Clark Way, & SW Madison Ct|
|Miscellaneous Site Work||Inside Portland Water Bureau fencing|
|Construction Fence Installation||Project site|
|Placement of Mobile Field Offices||Project site, below Reservoir 4|
|Vegetation / Tree Removal||Around the reservoirs, by SW Sacajawea and Sherwood Blvds|
|Erosion Control||Project site|
|Remove Steel Grillage, Fencing||Project site|
|Remove Weir Building||East of Reservoir 3|
The project will span eight years; the first two years will trigger the most significant impacts to traffic, transportation, and parking in the park.
Park users are encouraged to travel to and move safely around the park and its attractions by using the bus and light rail, walking, biking and skating, and taking the free park shuttle. Visit http://TriMet.org and www.ExploreWashingtonPark.org for transit options.
Following is a description of upcoming project work and impacts spanning now until August 2016.
April – May 2016
Vegetation and trees will be removed below Reservoir 4 near the pump station facilities and adjacent to SW Jefferson Street. All work will occur within the project site. Selective tree pruning and inspection will also occur within the project site, around the reservoirs, and along SW Sacajawea Boulevard, SW Lewis Clark Way, and SW Madison Court.
May - August 2016
Early site preparation work will occur, including construction fence installation, placement of mobile field offices, tree/vegetation clearing, and erosion control.
KEEPING YOU UP-TO-DATE
To contact us with questions or concerns or to change your preferences on how to receive project updates: