Yarmouth 4 Substation - 345 kV Electrical Substation in Yarmouth, Maine

Yarmouth 4 Substation is an operational electrical substation located in Yarmouth, Maine, United States. Owned and operated by Central Maine Power Company, the facility operates at a voltage of 345 kV, classifying it as a high-voltage transmission substation critical to the regional power grid. 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 bulk power systems. As a 345 kV facility, it plays a key role in transmitting electricity from generation sources to distribution networks, supporting grid stability in Maine and the broader New England region. The environmental context of Yarmouth 4 Substation includes its location in a coastal area of southern Maine, where the grid must withstand seasonal weather extremes such as winter storms and nor'easters. The substation's design and maintenance are likely adapted to these conditions, ensuring reliable power delivery to residential, commercial, and industrial customers in the region.

Yarmouth 4 Substation is situated in a coastal region of Maine, where the electrical infrastructure must endure harsh winter storms, high winds, and salt spray. These environmental factors necessitate robust design and regular maintenance to ensure grid reliability. The substation's 345 kV voltage level indicates its critical role in long-distance power transmission, connecting generation resources to load centers while maintaining stability under variable weather conditions.