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Grays Harbor Energy Center

(formerly Satsop Combustion Turbine Project) Amendment No. 5

Proponent: Invenergy LLC
2580 W. Main Street, #200
Littleton, CO 80120
(303) 730-1538
Proposed Facility: New Units 3 and 4 consisting of two combined cycle natural gas-fired combustion turbines and one 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:

2-18-2011 Governor's Approval Letter, Final Order, Final SCA

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

11-1-2010 NPDES Permit Modification More information

10-4-2010 Grays Harbor Energy Deliberative Session Transcript

9-23-2010 Grays Harbor Energy Deliberative Session Notice

8-30-2010 Grays Harbor Energy Deliberative Session Notice

7-16-2010 Power Point Presentations from public panel meetings July 13-15, 2010

7-14-2010 Additional Public Comment Meeting Notice August 10, 2010

7-1-2010 Noise Report prepared by ICF International

7-1-2010 Expedited Processing Public Notice and Summary Sheets related to public meetings on July 13-15, 2010

3-30-2010 Council Order No. 846 - Granting Expedited Process

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

2-10, 2010 MDNS Mitigated Determination of Non-Significance

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

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

12-18-2009 Public comment time extended to January 8, 2010

12-9-2009 Noise Report with the results of noise level monitoring during startup, base load and shutdown.

12-3-2009 Grays Harbor County Certificate of Land Use Consistency

11-20-2009 Notice of Initial Public Meeting and Land Use Meeting

11-10-2009 Request for Expedited Processing and SEPA Checklist

10-30-2009 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:

  • 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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