21st Street Substation - Medium-Voltage Substation in the United States

21st Street Substation is an operational electrical substation located in the United States, owned and operated by Montana-Dakota Utilities. The facility operates at a voltage of 41.6 kV, classifying it as a medium-voltage substation that plays a role in local power distribution and grid stability. As part of the U.S. electrical infrastructure, this substation operates under the regulatory framework of the North American Electric Reliability Corporation (NERC) and the Federal Energy Regulatory Commission (FERC). These standards ensure reliability and security of the bulk power system. The substation's voltage level is typical for distribution-level assets that step down power from transmission lines to serve industrial, commercial, and residential customers. The substation's location in the central United States places it within a region characterized by a mix of agricultural and energy industries. Its operational status contributes to the reliability of the local grid, supporting community energy needs and economic activities. The facility's age and specific equipment details are not publicly available, but its continued operation indicates compliance with current regulatory and safety standards.

The substation is situated in a rural area of the Great Plains, where the local environment is dominated by agriculture and open grasslands. Electrical infrastructure in such regions must consider potential impacts on wildlife, particularly birds and pollinators, through proper siting and maintenance practices. The facility's operation is subject to environmental regulations that minimize electromagnetic field exposure and ensure safe handling of insulating oils and other materials.