Very few in Michigan’s Upper Peninsula likely remember or were ever aware of a hidden US Navy site south of Marquette used to communicate with submarines that were submerged anywhere around the Earth.
The facility, one of two in the nation, was a set of miles-long antennas that transmitted messages in extremely low frequency or ELF. That transmission method gave its name to the structure as they were known as ELF faculties.
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The Michigan location, known as the Humboldt Site due to its location in Humboldt Township south of the hamlet of Republic.
The site was decommissioned in 2004. It was sold to Humboldt Township and later to a private owner.
Secret Military ELF Site in Michigan’s Upper Peninsula
The former ELF site can be seen, and is clearly marked on Google Maps.
The long clear terrain that can be seen to the west of the facility is cleared land for the antenna. They are said to resemble standard power lines but rather than supply power, the lines were the antenna that broadcast the ELF messages…