Jackson P-2157

General information

Waterway  Skykomish River
 Sultan River
Current status   Active license 
Type of facility Conventional Hydro
Mode of hydropower generation Peaking
Type of permit FERC License

FERC information

FERC docket # P-2157
FERC project name Henry M Jackson (Sultan)
Permit issued 8/28/11
Permit expiration 8/27/56

Ownership and operation

Owner Snohomish County PUD No 1
Owner type Publicly Owned Utility
Year first online (conventional hydro) 1984
Transmission or distribution system owner PUD 1 of Snohomish County

Power and generating capacity

Number of units 4
Total capacity from hydraulic turbine-generator units within each plant 111.8 MW
Average annual net hydropower generation 435,106.6 MWH

Download license summary for the Henry M. Jackson Hydroelectric Project .

The Henry M. Jackson Hydroelectric Project began operations in 1984 and is located in the Sultan River Basin. The project is colicensed by Snohomish PUD and the City of Everett. As part of the relicensing process studies are currently underway to assess the impacts of the project on fishery and recreational resources.

The Skykomish River is a tributary of the Snohomish River, which empties into the Puget Sound. These systems support several species of fish– including federally protected populations of steelhead and salmon.


  • Project began operations in 1984 and is located in the Sultan River Basin.
  • The original license issued June 16, 1961, expired on May 31, 2011.
  • The project is located on the Sultan River, 20 miles east of the City of Everett, Washington, in Snohomish County.
  • The project occupies 10.9 acres of the Mount Baker-Snoqualmie National Forest administered by the U.S. Forest Service (Forest Service).
  • Coalition members American Whitewater and Trout Unlimited participated in license proceeding, including settlement.
  • Coalition members and other stakeholders signed a 2009 settlement.
  • FERC issued a 45-year license for the project in September 2011.


Project Facilities

  • Culmback dam is an earthen fill dam 640-foot-long, 25-foot-wide, and 262-foot-high located at river mile 16.5. The dam impounds Spada Lake, an approximately 1,908-acre reservoir with a storage capacity of 153,260 acre-feet.
  • The powerhouse is a two-story concrete structure that contains four turbine-generating units with a total installed capacity of 111.8 MW.


River Mile Improvements

  • 16 miles on the Sultan River in Washington.
  • The new license includes provisions requiring restored flows (channel maintenance, channel process, and channel forming flows), habitat improvements, recreational access, restoration and enhancement of fishery resources in those 16 miles.
  • See the map showing the river reach to be affected:


Settlement Filed 10-14-2009
Major License Application Filed 06-01-2009
Final EA Issued 11-04-2010
License Issued 09-02-2011

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