The Washington Energy Facility Site Evaluation Council’s new website is currently under construction.  Some documents may be temporarily unavailable. If you have questions concerning documents or if you are having trouble viewing content, please contact EFSEC by e-mailing: or by phone at (360) 664-1345. Thank you for your patience as we work to update our website and its contents.

State of Washington Energy Facility Site Evaluation Council

The State of Washington Energy Facility Site Evaluation Council (EFSEC or Council) provides a "one-stop" siting process for major energy facilities in the State of Washington. EFSEC coordinates all evaluation and licensing steps for siting certain energy facilities in Washington. EFSEC specifies the conditions of construction and operation. If approved, a Site Certification Agreement is issued in lieu of any other individual state or local agency permits. EFSEC also manages an environmental and safety oversight program of facility and site operations.

EFSEC Recent Activity (last 90 days)


1300 S. Evergreen Park Dr. S.W.
PO Box 43172
Olympia, WA 98504-3172

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Phone: 360-664-1345

Business Hours: 8:00 AM to 5:00 PM
Monday - Friday except Holidays

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