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Hermiston Generating Project

Facility: A natural gas combustion turbine and combined cycle electric power plant with a generating capacity of 474 megawatts.

Status: Operating

Location: Umatilla County, 3 miles southwest of Hermiston.

Site Certificate Holder: Hermiston Generating Company L.P. and PacifiCorp

Contact Information 

Site Certificate Holder
Richard Moroney
Duane Kilsdonk
78145 Westland Rd.
625 Marion St. NE
Hermiston, OR 97838
Salem, OR 97301-3737
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·          To receive e-mail notices about this project, please click here.
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About Oregon’s siting process:
·          For more information about Oregon’s siting process outlined in the table below, please go here.
Project Status (Table details will be updated as project progresses)
Site certificate amendment #5: Allowed the construction of a pipeline and discharge of wastewater direct from the cooling tower blow-down and clarifier draw-down.
Feb. 9, 2001
Jan. 19, 2001
Nov. 17, 2000
Site certificate amendment #4: Allowed an alternate method for reuse of the energy facility’s process wastewater.
Sept. 3, 1997
Aug. 28, 1997
Site certificate amendment #3: Partial transfer of responsibility for operation and retirement of the facility to PacifiCorp.
July 26, 1996
July 23, 1996
Site certificate amendment #2: Modifications of conditions to be consistent with OAR 345-27 related to mandatory conditions and amendments.
Final order on amendment #2
May 10, 1996

May 10, 1996
Site certificate amendment #1: Decreased the facility site boundary, modified related and supporting facilities, added conditions related to options for waste minimization and structural standards.
Aug. 12, 1994
March 11, 1994
March 16, 1994