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Reclamation Announces Safety of Dams Drilling Program at Prosser Creek Dam

Post Date:05/12/2017

bureau of reclamation


For Immediate Release

May 12, 2017 

Mid-Pacific Region
Sacramento, Calif.

Media Contact:  
Russell Grimes

Reclamation Announces Safety of Dams Drilling Program at Prosser Creek Dam

TRUCKEE, Calif. – The Bureau of Reclamation will be performing a Safety of Dams drilling program at Prosser Creek Dam to evaluate the ability of the dam to resist large earthquakes. Prosser Creek Dam and Reservoir, part of Reclamation’s Truckee Storage Project, are located on Prosser Creek about 1 mile east of Truckee, California, and 27 miles west of Reno, Nevada.

Prosser Creek Dam is located in a seismically active area. The drilling program will help analyze the potential loss of strength, known as liquefaction that could result in a dam failure during an extreme earthquake. Reclamation will continue drilling at Prosser Creek Dam throughout the summer of 2017 to collect additional data which will be used to assess the likelihood of liquefaction and response of the dam.

Currently, Prosser Creek Reservoir is being held at approximately 9,000 acre-feet of storage and 5701 feet of elevation for flood control purposes. The low reservoir elevation is not related to the potential dam safety concern and is expected to begin rising as the spring runoff season develops.

For additional information about the exploration program, please contact Todd Hill at 916-978-5328 (TTY 800-877-8339) or For additional information regarding reservoir operations, please contact Scott Schoenfeld at 775-884-8351 or


Reclamation is the largest wholesale water supplier in the United States, and the nation’s second largest producer of hydroelectric power. Its facilities also provide substantial flood control, recreation, and fish and wildlife benefits. Visit our website at Follow us on Twitter @USBR and @ReclamationCVP.