The Chequamegon–Nicolet National Forest is a 1,530,647-acre U.S. National Forest in northern Wisconsin in the United States. Legally two separate national forests—the Chequamegon National Forest and t
Blackjack Springs Wilderness in the Nicolet National Forest
A bit of old-growth forest in Manitowoc County
Hauling logs in western Taylor County, 1909
The Fifield Fire Lookout Tower was built by the U.S. Forest Service in 1932 and operated by CCC Camp Riley Creek from around 1935 to 1941. Fire-spotters manned the tower until 1957.
Extremely low frequency
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Extremely low frequency is the ITU designation for electromagnetic radiation with frequencies from 3 to 30 Hz, and corresponding wavelengths of 100,000 to 10,000 kilometers, respectively. In atmospher
Chequamegon–Nicolet National Forest
…including camping, hiking, fishing, cross country skiing, and snowmobiling. Clam Lake in Chequamegon National Forest was also home to one of the two extremely low frequency antennae in the United States. List of national forests of the United States…
1982 aerial view of the U.S. Navy Clam Lake, Wisconsin, ELF transmitter facility, used to communicate with deeply submerged submarines. The rights of way of the two perpendicular 14 mile (23 km) overhead transmission lines, which constituted the ground dipole antenna, and which radiated the ELF waves, can be seen at the lower left.