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Chehalis Generation Facility


The Chehalis Generation Facility is a natural gas-fired combined-cycle electric generation facility. The 30 acre project site is located south of Chehalis, Washington, east of Interstate 5 in the Chehalis Industrial Park in Lewis County. (location map)

In March 1997, Governor Locke approved the original Site Certification Agreement (license to construct and operate) of the Chehalis Generation Facility. The facility licensed at that time proposed a total generating capacity of 460 MW, with the capability to provide approximately 100,000 lb/hr of steam to a process host.

In March 2001, Governor Locke approved the first amendment to the Site Certification Agreement allowing an increase in generating capacity from 460 MW to 520 MW, a change to a dry cooling system and associated water supply and discharge modifications, and allowing the facility to operate as a "merchant plant". (Council Order No. 753 recommending approval)

Construction began in May 2001 with commercial operations starting in October 2003.

In September 2008, EFSEC (through Order No. 836 and Resolution No. 325 transferred the Site Certification Agreement (Amendment No. 2) to PacifiCorp. The sale of the Chehalis Generating Facility to PacifiCorp was completed on September 15, 2008. On September 22, 2008, EFSEC transferred the Site Certification Agreement to PacifiCorp.

Additional Council orders and resolutions associated with this project are listed on theOrders and Resolutions Page

Certificate Holder: PacifiCorp
1813 Bishop Road
Chehalis, WA 98532
(360)748-1300
Facility: 520 MW natural gas fired combined cycle power plant
Status: Commercial operation began October 1, 2003.

General Information: Site Certification Agreement:

2008 Chehalis Generation Facility Site Certification Agreement Amendment No. 2 (24 pages)

2001 Site Certification Agreement Amendment No. 1 (25 pages)

Air Emission Permits and Compliance with Greenhouse Gas Regulations:

Air emissions resulting from the operation of the facility are permitted under the conditions of the PSD Permit, Title V (Air Operating) Permit, and Notice of Construction (for the auxiliary boiler—see below)

As part of the 2001 Site Certification Amendment process, EFSEC required the project to provide a plan for mitigation of CO2. In September 2002, EFSEC approved the Chehalis Green House Gas (GHG) Offset Strategy and Plan.

As part of the 2008 sale to PacifiCorp, EFSEC required the facility to implement additional GHG mitigation measures. The Site Certification Agreement requires PacifiCorp to:

1.Comply with the 2002 GHG Offset Strategy and Plan.

2.Provide $1.5 million in funding for GHG mitigation projects. PacifiCorp has nearly completed planning for a mitigation project and will soon submit the proposed project to EFSEC for review and approval.

3.Install and operate a natural gas-fired auxiliary boiler. The auxiliary boiler shortens power plant startup times and reduces pollutant emissions.

Air emissions resulting from the operation of the facility are permitted under the conditions of the PSD permit.

In approving the project EFSEC required the project to provide a plan for mitigation of CO2. mitigation plan development and in September 2002 EFSEC approved the Chehalis Greenhouse Gas Offset Strategy and Plan.

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Additional Information:

For information or questions concerning this project please contact:

Jim LaSpina, EFSEC Specialist
Energy Facility Site Evaluation Council
1300 S Evergreen Park Dr
PO Box 43172
Olympia, WA 98504-3172
(360) 664-1362

jlaspina@utc.wa.gov

To be added to the Chehalis Generation Facility mailing list, please:

  • E-mail your complete name and postal address to efsec@utc.wa.gov and indicate if you want to receive notices of future permitting activity for this project by e-mail, surface mail, or both methods of delivery.

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Recent Activity:

December 29, 2016
-Chehalis Title V Permit
-Title V Permit Statement of basis
-Response to Comments on draft permit

September 26, 2016
Agenda - Public Hearing Chehalis Generation Facility Title V Air Operating Permit

September 8, 2016
Issuance of Draft Title IV and Title V (AOP) Permits Comment Notice
Revised date of public Hearing

August 25, 2016
Renewal of Title V Air Operating Permit
Public Notice
Renewal Application
Draft Title V Basis Statement for Air Operating Permit (AOP)
Draft Title V Air Operating Permit (AOP)

October 10, 2011 Renewed Title V Air Operating Permit (AOP) issued to PacifiCorp Energy for the Chehalis Generation Facility (see attachment 2)

Septembe 4, 2009 Air Permit - Notice of Construction (NOC) for Auxiliary Boiler Issued.

September 22, 2008 EFSEC completes the SCA transfer to PacifiCorp, terminates the TNA Merchant Projects' Guaranty, and approves a Revised Site Restoration Plan.

Council Resolution No. 325 finalizes the transfer of the Chehalis Site Certification Agreement to PacifiCorp.

July 8, 2008 EFSEC approves transfer of the Chehalis Site Certification Agreement to PacifiCorp.

EFSEC Order No. 836 authorizes the transfer of the Chehalis Generation Facility Site Certification Agreement when EFSEC receives notice that the sale of the Chehalis Generation Facility to PacifiCorp is complete. Upon receipt of the sale notice EFSEC will issue a Resolution that amends the Site Certification Agreement to reflect ownership by PacifiCorp.

May 21, 2008 PacifiCorp's request to transfer the Chehalis Site Certification Agreement.

SEPA Determination of Nonsignificance and Environmental Checklist