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Grays Harbor Energy Center (formerly Satsop Combustion Turbine Project) Amendment No. 5 Page last updated December 27, 2012

Proponent: Invenergy LLC
2580 W. Main Street, #200

Littleton, CO 80120 
(303) 730-1538
Proposed Facility: New Units 3 and 4 consisting of 2 combined cycle natural gas-fired combustion turbines and 1 steam generator totaling 650 MW
Location: Elma, Grays Harbor County
Amendment Request Date: October 30, 2009

Amendment request approved by Governor on February 18, 2011.

Construction of the expansion has not begun.


General Description of the Amendment Request:

Grays Harbor Energy LLC (the Certificate Holder) proposed an increase of the Satsop Combustion Turbine (CT) Project's maximum generating capacity by approximately 650 megawatts (MW) to approximately 1,300 MW.  As with the existing facility (Phase 1 - Units 1 and 2), the addition would consist of two gas turbines and one steam turbine in a 2-on-1 configuration that would generate electricity to supply growing regional electrical demand.  The new facilities are referred to as (Phase 2 - Units 3 and 4) (artist illustration).

The October 30, 2009 Amendment Request No. 5 specifically asked EFSEC to:

  1. Change the name of the project from the Satsop CT Project to the Grays Harbor Energy Center (GHEC).
  2. Allow the addition of two combustion turbine generators and one steam generator (Units 3 and 4) to increase the facility capacity by 650 MW to approximately 1,300 MW.
  3. Enlarge the project site by 10 acres to allow space for construction laydown and access. (The Certificate Holder subsequently modified this portion of the request.  The Certificate Holder will temporarily lease land from the Grays Harbor Public Development Authority (PDA) to serve as a construction laydown area.)
  4. Approve a PSD permit for Units 3 and 4 (existing PSD permit would remain in place for Units 1 and 2).
  5. Increase the total maximum water withdrawal from 9.2 cfs to 16 cfs. No new water authorizations are requested.  The additional water will be purchased or leased from the PDA, which has an existing water authorization.

Units 3 and 4 will be located entirely within the boundaries of the previously permitted site.  Units 3 and 4 will be located on land that has already been disturbed and developed for industrial use. The GHEC will continue to be fueled by natural gas and will continue to utilize the natural gas pipeline installed for the existing facility.

Power produced by the GHEC will continue to be routed through transmission lines and the Satsop substation that are owned by the Bonneville Power Administration.

SCA Amendment Request (No. 5) October 2009:

November 2009:

Other Key Documents:

Project Milestones:

February 18, 2011 - Grays Harbor Energy - Governor's Approval Letter, Final Order, Final SCA

Notice of Construction/Prevention of Significant Deterioration Permits (Air Emissions)

November 1, 2010 - NPDES Permit Modification More information

October 4, 2010 - Grays Harbor Energy Deliberative Session Transcript

September 23, 2010 -
Grays Harbor Energy Deliberative Session Notice

August 30, 2010 -
Grays Harbor Energy Deliberative Session Notice

July 16, 2010 - Power Point Presentations from public panel meetings July 13-15, 2010

July 14, 2010 - Additional Public Comment Meeting Notice August 10, 2010

July 1, 2010 - Noise Report prepared by ICF International

July 1, 2010 - Expedited Processing Public Notice and Summary Sheets related to public meetings on July 13-15, 2010

March 30, 2010 - Council Order No. 846 - Granting Expedited Process

March 9, 2010 - Council Order No. 845, MDNS Public Comment No. 1, No. 2, & No. 3 Agency Comment No. 1 & No. 2

February 10, 2010 - MDNS Mitigated Determination of Non-Significance

January 26, 2010 - Revised Dept. of Fish and Wildlife comment letter Replaces Comment No. 15 dated 1-7-10

January 19, 2010 - Public comments No. 1-7 and 8-16 and Transcripts of Dec. 15, 2009 Public Meeting and Land Use Hearing

December 18, 2009 - Public comment time extended to January 8, 2010

December 9, 2009 - Noise Report with the results of noise level monitoring during startup, base load and shutdown.

December 3, 2009 - Grays Harbor County Certificate of Land Use Consistency

November 20, 2009 - Notice of Initial Public Meeting and Land Use Meeting

November 10, 2009 - Request for Expedited Processing and SEPA Checklist

October 30, 2009 - Request to Amend the SCA to increase capacity by 650 mw by adding new Units 3 & 4, change the name to Grays Harbor Energy Center, issue a new PSD for Units 3 & 4, and increase total project water use.

To be added to the Grays Harbor Energy Center project mailing list, please:

  • contact Kali Wraspir at (360) 664-1365, or
  • e-mail your complete name and postal address to 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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