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The City of Portland, Oregon

Portland Water Bureau

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

Customer Service: 503-823-7770


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Washington Park Reservoir Improvement Project

  • Project Updates Stay in the know about project progress! Sign up to receive emailed updates.

  • Upper Reservoir - Pump House View The new reservoir is engineered to withstand ongoing landslide encroachment and seismic events.

  • Serving Portland Since 1895 When completed, the new reservoir will provide service for at least another 100 years.

  • Lower Reservoir 4 - Downtown View A lowland wildlife habitat area, bio-swale, and reflecting pool will be constructed.

  • Supplying Water to Portland's West Side Serving more than 360,000 people, 20 schools, three hospital complexes, 60 parks, and major attractions.

  • Upper Reservoir 3 - Grand Staircase View The new reservoir, in the footprint of the historic Reservoir 3 (upper), features a reflecting pool at ground level.

  • Washington Park Reservoir Improvement Project A new 12.4-million gallon, seismically reinforced underground reservoir.

  • Lower Reservoir 4 - Powerhouse View Existing Reservoir 4 (lower) will be disconnected from the public drinking water system.

Take the Virtual Tour


Updated: March 6, 2019

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What's Happening Now 

After postponements and delays due to weather, the first foundation slab section has been poured. Work was finally able to begin at mid-day Monday, March 4, and continued into the evening. This is the first of 11 slab sections in the Reservoir 3 site. Stay tuned to this webpage for more information on upcoming pours.

To see time-lapse photos of the pour click HERE.

To see recent photos and learn more about activities over the past month, click HERE

Check out the new banners in the park showing historic photos from the building of the original reservoirs and concept illustrations of the new finish reservoir HERE.

NIGHT WORK, December 2018 - November 2019 (more information HERE)

Due to the size and volume of concrete needed, deliveries will begin in the early morning, in some cases as early as 2:30 am and will continue through the day, with new concrete trucks arriving approximately every 3 - 5 minutes. Concrete deliveries should be completed before 6 pm but on site work will continue beyond that time to complete the finishing work.

Did You Know?

In 1912, local philanthropist Simon Benson donated $10,000 to the City of Portland to install 20 bronze drinking fountains, now known as Benson Bubblers. Local lore suggests that Benson, who ran a lumber company, donated the downtown drinking fountains in an effort to keep loggers out of the saloons at lunchtime. To learn more about Benson Bubblers and their locations click HERE.  Hawk visits site


Hawk visits site for an up close inspection.


Community Outreach History

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Project Overview

Including the project description, map and schedule

Stay Informed

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Traffic Impacts

Beginning April 2, 2018