LR Mann Substation - 115 kV Substation in Arkansas, United States

LR Mann Substation is an operational electrical substation located in Arkansas, United States, and operated by Entergy Arkansas. The facility operates at a voltage of 115 kV, classifying it as a medium-voltage substation within the regional transmission network. As part of Entergy Arkansas's infrastructure, it plays a role in distributing electricity to local communities and industries. The substation operates under the regulatory framework of the United States, which includes reliability standards set by the North American Electric Reliability Corporation (NERC) and oversight by the Federal Energy Regulatory Commission (FERC) for transmission-level assets. The 115 kV voltage level is typical for sub-transmission or distribution substations, connecting higher-voltage transmission lines to lower-voltage distribution networks. LR Mann Substation contributes to grid stability and reliability in the region by stepping down voltage for local distribution. Its operational status ensures continued service to customers in the area, supporting residential, commercial, and industrial electricity needs. The facility is part of a broader network that maintains power quality and supply continuity.

The substation is located in a region with a temperate climate, typical of the southern United States. Electrical infrastructure like LR Mann Substation can have localized environmental impacts, including electromagnetic fields and land use for equipment and access roads. The 115 kV voltage level is associated with moderate environmental considerations, such as clearance requirements for vegetation management to prevent outages. Urban or rural siting influences the extent of community and ecological interaction.