About
We’re improving our stormwater system by building filtration systems next to the bridges and stormwater treatment sites along U.S. 30. Each site will collect stormwater from the highways and filter it, before releasing it to the Willamette River between Sauvie Island and downtown Portland. Most sites are underground and will not be visible from roads and sidewalks.
Rain from roads and other hard surfaces picks up trash, metals such as copper and lead, oil and other pollutants. When untreated, these pollutants wash into drains and nearby waterways diminishing water quality and habitat. Each filtration system we build will improve water quality in the Willamette River by removing large debris like trash and smaller pollutants like metals and oil before they reach the river.
Site Overview Map
Above: An aerial view of Portland and the Willamette River showing where the project sites are located. Click here to enlarge. What are we building at each location?
St Johns Bridge (East and West)
Two underground filtration systems: one beneath N Philadelphia Ave on the east end of the bridge with a second beneath NW Knappton-General Road on the west end.
Fremont Bridge East
An aboveground filtration system at the base of the bridge approximately 8 feet tall and 30 feet long. Although it will be visible, the stormwater treatment system will not be visible from public parks or spaces.
Fremont Bridge West
An underground filtration system beneath the landscaping at the base of the bridge, near the Willamette Greenway Trail.
Fremont Bridge West Ramps (1500 NW Raleigh St)
The largest underground stormwater treatment system within the project is planned at 1500 NW Raleigh Street. The site will have an approximately 12’ tall, prefabricated control room and an approximately 20’ tall storange tank to help manage the underground filtration system; both will be visible from the street.
U.S. 30
Underground filtration systems will be built in the highway shoulder between NW Nicolai Street and NW Marina Way.
Location
Multiple
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U.S. 30, I-405 (Fremont Bridge), and U.S. 30B (St Johns Bridge).
Cost and Funding
$37 million.
Benefits
This project will reduce water pollution to benefit water quality, fish, wildlife habitat, and public health. We are helping protect the environment by removing materials that don’t belong in our water, including trash, metals, and oil, as water runs off our highways into the Willamette River using our current stormwater runoff system.
Additional Information
Accommodations
For ADA (Americans with Disabilities Act) or Civil Rights Title VI accommodations, translation/interpretation services, or more information call 503-731-4128, TTY 800-735-2900 or Oregon Relay Service 7-1-1.
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