Overview
LR West Markham Substation is an operational 115 kV substation in Little Rock, Arkansas, owned and operated by Entergy Arkansas. It plays a key role in the regional electrical grid.
LR West Markham Substation is a 115 kV electrical substation located in Little Rock, Arkansas, United States. Owned and operated by Entergy Arkansas, the facility is part of the larger transmission and distribution network serving the central Arkansas region. As a substation operating at 115 kV, it falls within the sub-transmission voltage class, typically used to distribute power from higher-voltage transmission lines to local distribution networks. The substation operates under the regulatory framework of the North American Electric Reliability Corporation (NERC) and the Federal Energy Regulatory Commission (FERC), which set reliability standards for the bulk power system. Entergy Arkansas, as a utility, must comply with these standards to ensure grid stability and security. The facility's voltage level of 115 kV is common for substations that serve urban and suburban areas, providing a balance between capacity and local distribution needs. The LR West Markham Substation supports the electrical infrastructure of Little Rock, a city with a mix of residential, commercial, and industrial loads. Its operational status ensures continued reliability for the surrounding community. The substation's location in an urban area underscores its importance in maintaining power quality and availability for local consumers and businesses.
Environmental context
The substation is situated in an urban environment in Little Rock, Arkansas, where electrical infrastructure must balance reliability with environmental considerations. Urban substations like this one are typically designed to minimize visual impact and may include noise mitigation measures. The 115 kV voltage level indicates a moderate scale of operation, with potential electromagnetic field (EMF) considerations managed through standard siting practices. The facility's role in the grid supports energy delivery to residential and commercial areas, contributing to the local economy while adhering to environmental regulations.
Frequently asked questions
LR West Markham Substation is located in Little Rock, Arkansas, United States, at coordinates 34.753270, -92.398763.
LR West Markham Substation operates at 115 kV, which is a common sub-transmission voltage level for distributing power to local networks.
The substation is owned and operated by Entergy Arkansas, a utility company serving parts of Arkansas.
As part of the US bulk power system, the substation must comply with NERC reliability standards and FERC regulations to ensure grid stability and security.
A 115 kV substation steps down voltage from higher transmission lines (e.g., 230 kV or above) to distribution levels, serving urban and suburban areas with reliable electricity.