Marshalltown West Main Substation - 161 kV Substation in Marshalltown, Iowa

Marshalltown West Main Substation is an operational electrical substation located in Marshalltown, Iowa, United States. Owned and operated by Alliant Energy, the facility operates at a voltage of 161 kV, classifying it as a high-voltage substation critical for regional power distribution. 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 in the United States. As a 161 kV facility, it plays a key role in stepping down transmission-level power for local distribution, typical of substations serving mid-sized communities. This substation supports the electrical infrastructure of Marshalltown and surrounding areas, contributing to grid stability and reliability. Its location in a mixed urban and rural setting underscores its importance in maintaining consistent power supply for residential, commercial, and industrial users in the region.

The substation is situated in Marshalltown, Iowa, a region characterized by agricultural land and a temperate climate. The 161 kV voltage level indicates its role in the transmission network, which can have localized environmental impacts such as electromagnetic fields and land use. The facility's urban-rural interface means it supports both community and agricultural power needs, with typical considerations for vegetation management and wildlife protection.