Sammis Substation - Operational High-Voltage Substation in the United States

Sammis Substation is an operational electrical substation located in the United States, with coordinates 40.531952, -80.633821. It operates at high voltage levels of 345 kV and 138 kV, indicating its role in bulk power transmission and distribution. The substation is part of the national grid infrastructure, supporting the reliable delivery of electricity across the region. Operating under the regulatory framework of the United States, the substation adheres to NERC reliability standards and FERC regulations for transmission-level assets. The dual voltage levels suggest it serves both long-distance transmission (345 kV) and regional distribution (138 kV), typical for major substations in the US grid. The facility's location in the Appalachian region places it within a network that supports industrial, commercial, and residential demand. The substation's operational status and voltage capacity contribute to grid resilience and energy security. As part of the broader electrical infrastructure, it facilitates power flow from generation sources to load centers, ensuring stable electricity supply. Its role is critical for maintaining system reliability and supporting economic activities in the surrounding area.

The substation is located in a region with varied topography, including hills and valleys, which can influence transmission line routing and maintenance. The area experiences a temperate climate with seasonal temperature extremes, requiring robust equipment design to handle thermal expansion and ice loading. The substation's voltage levels indicate it is a key node in the grid, potentially connecting to power plants and industrial facilities, which may have localized environmental impacts such as electromagnetic fields and land use considerations.