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Stormwater Sites

The stormwater facilities we are building are shown in the map below. They include 5 underground filtration tanks next to the St Johns and Fremont bridges, and 15 underground stormwater treatment sites or roadside ditches along U.S 30. Each site will collect stormwater from these highways and filter it, before releasing it to the Willamette River between Sauvie Island and downtown Portland. Most sites will not be visible from roads and sidewalks because they will be underground.

Map showing the 20 sites on U.S. 30 and at the St Johns and Fremont Bridges from Sauvie Island to downtown Portland.
Overview of the 20 sites and their locations on U.S. 30 and at the bridge sites.