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Portland Water Bureau

From forest to faucet, we deliver the best drinking water in the world.


1120 SW Fifth Ave, Suite 600, Portland, OR 97204

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Lower Reservoir 4

Existing Reservoir 4 (lower) will be disconnected from the public drinking water system.

Lower Reservoir 4

A lowland wildlife habitat area, bio-swale, and reflecting pool will be constructed in the basin of existing Reservoir 4..

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Upper Reservoir 3

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.

Upper Reservoir 3

A new 12.4-million gallon, seismically reinforced below ground reservoir will be constructed in the same footprint of existing Reservoir 3 (upper) with a reflecting pool/water feature on top.

Washington Park Reservoir Improvements Project

In order to comply with federal and state mandates, and ensure a healthy, resilient, and secure water system, the Portland Water Bureau is updating the Washington Park reservoir site.

Washington Park Reservoirs 3 & 4

The Water Bureau supplies drinking water to more than 950,000 people in the Portland metropolitan region. A large capacity reservoir at Washington Park is an essential part of Portland’s water system, serving areas west of the Willamette River.