Due to public health concerns related to the spread of the novel corona virus (COVID-19), the Energy Facility Site Evaluation Council office (EFSEC) is closed to the public as of March 16, 2020. All EFSEC staff are telecommuting until further notice and EFSEC operations will continue remotely. You may reach EFSEC by phone (360) 664-1345 or by email efsec@efsec.wa.gov during regular business hours, 8 am – 5 pm, Monday through Friday. EFSEC Council meetings will be held by teleconference until further notice. Please check this site regularly for updates.

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Horse Heaven Application

Application Extension Request

The Application Extension Request was approved by the Council at the January 18, 2022 EFSEC Council Meeting.

Application Extension Request

Document Titlesort descending Document Date
Extension Request 01/07/2022

Expedited process


Copies of the Horse Heaven application can be found at:

Hard Copy:

Energy Facility Site Evaluation Council
621 Woodland Square Loop SW
Lacey, WA, 98504-3172

Flash Drive:

Mid-Columbia Libraries – Kennewick Branch
1620 S Union Street
Kennewick, WA 99338

Mid-Columbia Libraries – Prosser Branch
902 7th St.
Prosser, WA 99350

Mid-Columbian Libraries - Keewydin Park Branch
405 S. Dayton St.
Kennewick, WA 99336

Richland Public Library
955 Northgate Dr
Richland, WA 99352

Mid-Columbia Libraries – Pasco Branch
1320 W. Hopkins St.
Pasco, WA 99301

Mid-Columbian Libraries - West Pasco Branch
7525 Wrigley Dr.
Pasco, WA 99301

WA State Library
Point Plaza East
6880 Capitol Blvd.
Tumwater, WA 98501