Highway 511 Substation - Texas Electrical Substation Operated by South Texas Electric Cooperative

Highway 511 Substation is an electrical substation located in Texas, United States, and is operated by South Texas Electric Cooperative. The facility is operational and plays a role in the regional power transmission network, handling voltage at 138 kV, which is typical for sub-transmission or distribution-level infrastructure. 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. As a cooperative-owned asset, it likely serves rural or suburban areas, contributing to grid stability and power distribution for member consumers. This facility is part of the broader electrical infrastructure supporting the Texas Interconnection, one of the three main power grids in the United States. Its location in southern Texas places it in a region with growing energy demand, and the substation helps ensure reliable electricity delivery to local communities and industries.

The substation is located in a region with a subtropical climate, where extreme weather events such as hurricanes and heatwaves can impact grid reliability. The facility's design and maintenance must account for these conditions to ensure continuous operation. Its rural setting may reduce direct environmental impact compared to urban substations, but it still requires vegetation management and wildlife protection measures.