PGE would add new transmission infrastructure in upgrading Carty

Portland General Electric (PGE) (NYSE:POR) has filed an amendment to its existing Oregon site certificate for the 900-MW combined-cycle Carty natural gas power plant.

The utility seeks not only to expand the licensed generating capacity from 900 MW to about 1,360 MW, but also to significantly upgrade Carty’s transmission infrastructure. The expansion would include a major substation.

PGE placed the first 440-MW natural gas power unit into service at Carty earlier this summer. It is currently licensed add a second gas-powered unit to increase the total output to about 900 MW.

In addition to increasing its generation capacity, PGE would add a 500-kV substation; interconnecting transmission lines and associated lattice steel structures; and, depending on final design, could include additional water pipelines, utility power lines, control and communication systems, and other support systems.

The Carty plant is 13 miles southwest of Boardman in Morrow County. The facility is adjacent to the Boardman coal plant. The transmission line approved as a related and supporting facility to the energy facility extends across the western portion of Morrow County and into eastern Gilliam County to connect to the existing Bonneville Power Administration Slatt Substation.

On the generation side, the amended certificate would an additional 330 MW natural‐gas fired generating unit, a 50‐MW photovoltaic solar unit, increase the nominal capacity of Unit 2, and additional related and supporting facilities. The comment deadline for the site amendment request is Oct. 17.

About Corina Rivera-Linares 3160 Articles
Corina Rivera-Linares, chief editor for TransmissionHub, has covered the U.S. power industry for the past 15 years. Before joining TransmissionHub, Corina covered renewable energy and environmental issues, as well as transmission, generation, regulation, legislation and ISO/RTO matters at SNL Financial. She has also covered such topics as health, politics, and education for weekly newspapers and national magazines. She can be reached at