Skip to Main Content View Text-Only

Portland Water Bureau

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

GENERAL INFORMATION: 503-823-7404

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

More Contact Info

UPDATE: Powell Butte Reservoir 1 to Undergo Routine Maintenance Cleaning

By Lindsay Wochnick

FEBRUARY 27
On the afternoon of February 26, Portland Water Bureau operating engineers completed the draining of Powell Butte Reservoir 1 into Johnson Creek. Reservoir 1 is now completely emptied and will undergo a routine cleaning and inspection to ensure sanitary and structural integrity.

The draining process began on February 9 and lasted just under three weeks. Throughout the entire operation, the flowrate of water into Johnson Creek was monitored 24-hours a day by the Water Bureau’s Water Control Center. Water Bureau operating engineers routinely tested the water for temperature, pH, and chlorine residual, ensuring that acceptable discharge parameters and environmental regulatory requirements were met. No chlorine residual was detected at any time during the discharge.

The reservoir will now receive a thorough cleaning and inspection.


FEBRUARY 19
Portland Water Bureau operating engineers are in the process of slowly draining water currently in Powell Butte Reservoir 1 into Johnson Creek.

Since the draining process began on Monday, February 9, operating engineers have been routinely testing the water for temperature, pH, and chlorine residual. No chlorine residual has been detected. 

On Thursday, February 19, draining into the creek from the reservoir will begin occurring 24-hours a day, instead of just during normal work hours. This decision culminated from a reduction in stream flow and a low chance for precipitation.

The flowrate of water into Johnson Creek will continue to be monitored 24-hours a day by the Water Bureau’s Control Center. Routine testing of the water will carry on throughout the operation to ensure acceptable discharge parameters and environmental regulatory requirements are met.

In an estimated 15 days, Powell Butte Reservoir 1 will be completely emptied and will undergo a routine cleaning and inspection to ensure sanitary and structural integrity.


FEBRUARY 6
On Monday, February 9, the Portland Water Bureau will begin conducting a routine maintenance draining and cleaning of Reservoir 1 at Powell Butte Nature Park in Southeast Portland. 

Water Bureau operating engineers will slowly drain the approximately eight-million gallons of water currently in Reservoir 1 into Johnson Creek. The engineers will be on site during work week hours to supervise the operation.

The flowrate of water into Johnson Creek will be monitored 24-hours a day by the Water Bureau’s Control Center. Frequent testing of the water for turbidity, temperature, pH, and chlorine residual will occur throughout the operation, ensuring acceptable discharge parameters and environmental regulatory requirements are met.  

Once the draining is complete, the reservoir will undergo a thorough cleaning and inspection.

Reservoir 1’s draining is estimated to be complete by Wednesday, February 25.

Powell Butte Reservoir 1 was built in 1979-1980 and became operational in 1981.Powell Butte Reservoir 1, along with the newly operational Reservoir 2, are valuable assets to the water infrastructure. The two 50-million gallon underground tanks will help provide sufficient drinking water storage capacity to meet anticipated future growth in demand for water.

The Water Bureau follows strict guidelines and maintenance schedules to ensure the reservoirs are kept at optimal levels of operation. The underground reservoirs receive a thorough cleaning and inspection every five years to ensure structural and sanitary integrity.

For questions regarding reservoir maintenance, please contact Tim Hall, Public Information, at 503-823-6926 or by e-mail at: Tim.Hall@portlandoregon.gov.  

Visit the project webpage at: www.portlandoregon.gov/water/powellbutte.

Lindsay Wochnick
Public Information

Comments

Please review our Code of Conduct rules before posting a comment to this site. Your comment will be visible to site administrators only.

Submit a Comment
Name (optional)
E-mail (optional)
 Remember Info Yes   No
Comments
Spam Prevention In the Pacific Northwest, what state is Portland in?