Snohomish County Public Utility District No. 1

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Customer Service (M-F 8a-5:30p): 425-783-1000

Hydroelectric Power

Hydroelectric power accounts for more than 85 percent of our fuel mix. BPA’s projects supply most of our hydropower. Other sources include the Jackson Hydroelectric Project, Woods Creek Hydroelectric Project, Youngs Creek Hydroelectric Project, Calligan Hydroelectric Project, Hancock Hydroelectric Project, and Packwood Hydroelectric Project.

Posted 10/04/16

Hydropower & Greenhouse Gas

Researchers at Washington State University recently reported that reservoirs of all kinds are sources of methane, a potent greenhouse gas. One of the main reasons cited was the way some dams trap organic materials, which provide food for microbes – and more methane, in turn, is produced by the microbes.

However, the federal hydropower system on the Columbia and Snake rivers does not possess the characteristics or conditions for methane production. The reservoirs do not have large amounts of plant or biomass present or flowing into them which creates methane, the waters are not stratified or eutrophic and circulate regularly; and they contain high levels of dissolved oxygen.

For additional background:

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Scott Spahr
(M-F, 8am to 5pm)