|Type||TV transmission tower|
|Location||Blanchard, Traill County, North Dakota|
|Completed||August 13, 1963|
|Height||628.8 m (2,063 ft)|
|Design and construction|
|Main contractor||Kline Iron and Steel|
The KVLY-TV mast (formerly the KTHI-TV mast) is a 2,063 ft (628.8 m) tall television-transmitting mast in Blanchard, Traill County, North Dakota, United States, used by Fargo station KVLY-TV channel 11. Completed in 1963, it was the tallest structure ever built until succeeded by the Warsaw radio mast in 1974; that mast collapsed in 1991, making the KVLY-TV mast again the tallest structure in the world until the Burj Khalifa overtook it in 2010. It remains the third-tallest structure in the world (since the construction of the Tokyo Skytree), and the tallest structure in the western hemisphere. It is a guyed mast, not a self-supporting structure, and is therefore not included in lists of tallest buildings. The height of the transmitting antenna itself is 113 feet (34 m) and is included in the height of the tower as the lattice tower itself ends around 1,950 feet (590 m). The tower weighs 864,500 pounds (392.1 t) altogether and takes up 160 acres (0.65 km2) of land with its guy anchors. The 113-foot antenna alone weighs 9,000 pounds. In 1989, daredevils climbed the tower and BASE jumped from it.
The tower is located 3 miles (4.8 km) west of Blanchard, North Dakota, halfway between Fargo and Grand Forks. It became the tallest artificial structure, and the first man-made structure to exceed 2,000 feet (610 m) in height, upon the completion of its construction on August 13, 1963.
Owned by Hoak Media of Dallas, Texas, the tower broadcasts at 356 kW on Channel 44 for television station KVLY-TV (channel 11 PSIP, an NBC affiliate) which is based in Fargo. The tower provides a broadcast area of roughly 9,700 sq mi (25,000 km2) which is a radius of about 55.6 miles (89.5 km).
Its height above mean sea level is 3,038 ft (926 m). Some time after its completion, the Federal Communications Commission (FCC) and Federal Aviation Administration (FAA) imposed a policy that states, "Although there is no absolute height limit for antenna towers, both agencies have established a rebuttable presumption against structures over 2,000 feet above ground level." The FCC and FAA may approve a taller structure in "exceptional cases."
When the mast was built the call letters of the television station for which it was built were changed to KTHI, the "HI" referring to the height of the mast. The top is reachable by a two-person service elevator or ladder.
Structures of similar height 
See also 
- List of masts
- Tallest structures in the U.S.
- List of the world's tallest structures
- Warsaw radio mast
- "N.D. TV Tower No Longer World's Tallest". All Things Considered (NPR.org). 5 January 2010. Retrieved 2011-12-06.
- "KVLY-TV Tower". Emporis. Retrieved 2011-12-06.
- "Info". Valleynewslive.com.[dead link]
- "Big Jump". Youtube.
- "Antenna Tower Lighting and Marking Requirements". Federal Communications Commission. Retrieved 2011-12-06.
|Wikimedia Commons has media related to: KVLY-TV mast|
- KVLY Tower at Structurae
- Tower web page at KVLY-TV
- Listing 1046244 in the U.S. Federal Communications Commission (FCC) Antenna Structure Registration database
- Listing on the Skyscraper Page
- Drawings of KVLY/KTHI TV Mast from the Skyscraper Page
- KVLY and KXJB Towers from PBPhase.com
- Video of the KVLY Tower, summer 2009 from YouTube
|World's tallest structure
2,063 ft (628.8 m)
Warsaw radio mast
Warsaw radio mast