KXJB-TV mast

The KXJB-TV mast is a television transmitting tower in Traill County, North Dakota, United States. At 2060 ft (628 m), it is the fourth-tallest artificial structure in the world, shorter by 3 ft (1 m) than the KVLY-TV mast which stands a few miles away.
Located 3.5 miles (6 km) northeast of Galesburg, North Dakota, it was completed in 1966, to replace the station's previous mast, a 1,085-foot (331 m) tower 15 miles (25 km) northeast of Valley City, North Dakota which was sold to KOVC, an AM radio station.
The antenna transmits at 100 kW for CBS affiliate KXJB of Valley City/Fargo; the station and tower are owned by Parker Broadcasting of Fargo.
Collapses
The mast has fallen and been rebuilt twice. The first collapse occurred at 9:08 A.M. February 14, 1968 when the rotor of a Marine helicopter severed some guy wires (all four aboard the helicopter were killed in the mishap). The television station was off the air for eight days...