Overview
Mount Vernon Substation is an operational electrical substation in South Dakota, United States, operated by East River Electric Power Cooperative. It operates at 69 kV, serving the local grid.
Mount Vernon Substation is an operational electrical substation located in South Dakota, United States. It is owned and operated by East River Electric Power Cooperative, a generation and transmission cooperative serving member distribution systems in eastern South Dakota and western Minnesota. The substation operates at a voltage of 69 kV, which is typical for sub-transmission and distribution-level infrastructure in rural cooperative networks. The substation falls under the regulatory oversight of the North American Electric Reliability Corporation (NERC) and the Federal Energy Regulatory Commission (FERC), which set reliability standards for the bulk power system. As part of a cooperative network, it adheres to NERC's Critical Infrastructure Protection (CIP) standards and regional reliability requirements. The 69 kV voltage level indicates it serves as a distribution substation, stepping down power from higher transmission voltages for local delivery. Mount Vernon Substation plays a key role in providing reliable electricity to the surrounding rural community. Its operation supports agricultural and residential loads in the region, contributing to grid stability and energy access. The substation's location in South Dakota places it within the Southwest Power Pool (SPP) regional transmission organization, which coordinates grid operations and wholesale electricity markets across the central United States.
Environmental context
The substation is located in a rural area of South Dakota, characterized by agricultural land and low population density. The environmental context includes potential impacts from electromagnetic fields (EMF) and the need for vegetation management to maintain clearance around conductors. The facility's operation supports the integration of renewable energy sources, such as wind power, which is abundant in the region, by providing grid interconnection and stability.
Frequently asked questions
Mount Vernon Substation is located in South Dakota, United States, near the town of Mount Vernon. Its coordinates are approximately 43.694691 N, -98.246157 W.
Mount Vernon Substation operates at a voltage of 69 kV, which is a common sub-transmission voltage level used for distributing electricity from transmission lines to local distribution networks.
Mount Vernon Substation is operated by East River Electric Power Cooperative, a generation and transmission cooperative that provides wholesale electricity to member distribution cooperatives in eastern South Dakota and western Minnesota.
As part of the U.S. bulk power system, Mount Vernon Substation must comply with NERC reliability standards, including CIP requirements for cybersecurity and physical security, as well as FERC regulations for transmission infrastructure.
A 69 kV substation typically serves as a distribution substation, stepping down higher transmission voltages (e.g., 115 kV or 230 kV) to lower distribution voltages (e.g., 12.47 kV) for delivery to homes and businesses. It also provides switching and protection functions to maintain grid reliability.