Overview
Lemay Substation is an operational 138 kV substation in Missouri, United States, owned and operated by Ameren Missouri. It plays a key role in regional grid stability and power distribution.
Lemay Substation is a 138 kV electrical substation located in Missouri, United States. Owned and operated by Ameren Missouri, the facility is part of the regional transmission network that supports the St. Louis metropolitan area. As a medium-voltage substation, it serves as a critical node for stepping down transmission-level power for local distribution. The substation operates under the regulatory framework of the North American Electric Reliability Corporation (NERC) and the Federal Energy Regulatory Commission (FERC), which enforce reliability standards for bulk power systems. The 138 kV voltage level is common for sub-transmission and distribution substations in the United States, balancing capacity and safety. Ameren Missouri, a major utility in the region, maintains the facility to ensure grid stability and compliance with NERC's Critical Infrastructure Protection (CIP) standards. Environmentally, the substation is situated in an urbanized area near the Mississippi River, where it supports residential and industrial electricity demand. Its role in the grid helps reduce transmission losses by localizing voltage transformation. The facility's operational status and adherence to regulatory standards contribute to the reliability of the regional power supply, benefiting communities and businesses in the area.
Environmental context
Located in an urban setting near the Mississippi River, Lemay Substation is part of a densely populated area with significant electricity demand. The 138 kV voltage level indicates a medium-scale facility that helps reduce transmission losses by serving local distribution networks. The substation's presence supports grid stability in a region prone to extreme weather events, such as thunderstorms and ice storms, which can impact power infrastructure.
Frequently asked questions
Lemay Substation is located in Missouri, United States, near the Mississippi River in the St. Louis metropolitan area.
Lemay Substation operates at 138 kV, a common voltage for sub-transmission and distribution substations in the United States.
Lemay Substation is owned and operated by Ameren Missouri, a major utility serving the state of Missouri.
As part of the U.S. bulk power system, Lemay Substation must comply with NERC reliability standards and FERC regulations, including Critical Infrastructure Protection (CIP) requirements.
A 138 kV substation steps down transmission-level voltage for local distribution, helping to reduce power losses and improve grid reliability in urban and suburban areas.