Ninemile Point Substation - Entergy Louisiana Electrical Substation in Louisiana, United States

Ninemile Point Substation is an electrical substation located in Louisiana, United States, owned and operated by Entergy Louisiana. The facility is operational and plays a key role in the regional transmission network, handling voltage levels of 230 kV and 115 kV, which are typical for high-voltage substations supporting industrial and urban load centers. 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 the bulk power system in the United States. As part of the Entergy Louisiana system, the substation is integrated into the Midcontinent Independent System Operator (MISO) market, ensuring grid stability and efficient power distribution across the region. Located near the Mississippi River, the substation supports the electrical infrastructure for the greater New Orleans area, including industrial facilities and residential communities. Its strategic position contributes to the resilience of the local grid, particularly in a region prone to extreme weather events such as hurricanes, where reliable substation operation is critical for emergency response and recovery.

The substation is situated in a low-lying coastal region near the Mississippi River, an area characterized by wetlands and urban development. The local environment is influenced by the river's hydrology and the Gulf of Mexico's weather patterns, including hurricane risks. Electrical infrastructure in this region must be designed to withstand flooding and high winds, with elevated substation equipment and robust emergency protocols to maintain grid reliability during extreme events.