Bayou Cassotte Substation - 115 kV Substation in Pascagoula, Mississippi

Bayou Cassotte Substation is an electrical substation located in Pascagoula, Mississippi, United States. It is owned and operated by Singing River Electric Cooperative, a member-owned utility serving parts of Mississippi and Alabama. The substation operates at 115 kV, a common voltage level for sub-transmission and distribution, indicating it serves as a critical node for delivering electricity to residential, commercial, and industrial customers in the area. As a 115 kV substation, Bayou Cassotte is part of the regional electric grid that connects higher-voltage transmission lines to lower-voltage distribution networks. In the United States, substations of this voltage class are subject to reliability standards set by the North American Electric Reliability Corporation (NERC) and regulated by the Federal Energy Regulatory Commission (FERC) for interstate aspects. The facility likely includes switchgear, transformers, and protection systems that comply with industry standards such as IEEE C37 for switchgear and IEC 61850 for substation automation. The substation's location in coastal Mississippi places it in an area prone to hurricanes and severe weather, which requires robust infrastructure design for resilience. Singing River Electric Cooperative serves over 90,000 members, and Bayou Cassotte Substation contributes to the reliability of power supply for the community, supporting economic activities and daily life in the region.

The substation is situated in a coastal environment near the Gulf of Mexico, which presents challenges such as salt spray, high humidity, and the risk of storm surges. These conditions necessitate corrosion-resistant materials and elevated equipment to ensure operational continuity. The surrounding area includes wetlands and waterways, so any maintenance or expansion must consider local environmental regulations to minimize ecological impact.