Saint Mary's Substation - Operational Electrical Substation in Oregon, United States

Saint Mary's Substation is an operational electrical substation located in Oregon, United States. Owned by Portland General Electric, the facility plays a key role in the regional power transmission and distribution network. The substation operates at voltage levels of 230 kV and 115 kV, indicating its function in both high-voltage transmission and sub-transmission. The substation is part of the broader electrical infrastructure in the Pacific Northwest, a region with a mix of hydroelectric, natural gas, and renewable energy sources. As a facility of Portland General Electric, it operates under the regulatory oversight of the Federal Energy Regulatory Commission (FERC) and adheres to North American Electric Reliability Corporation (NERC) reliability standards. The dual voltage levels suggest it serves as a step-down point between transmission and distribution networks. Environmentally, the substation is situated in an area with moderate seismic risk, typical of the Pacific Northwest. Its location in a suburban or rural setting near Hillsboro and Beaverton means it supports both residential and commercial loads. The facility's operational status ensures continued grid stability and power delivery to the surrounding communities.

The substation is located in the Tualatin Valley, a region with a temperate climate and significant urban development. The area's electrical infrastructure must accommodate growing demand from residential and tech industry loads. The facility's voltage levels and ownership by a major utility indicate its criticality to local grid stability, with potential environmental considerations related to electromagnetic fields and land use.