KVLY-TV天線塔

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KVLY-TV天線塔(以前的KTHI-TV天線塔)是一座位於美國北達科他州特雷爾縣的電視塔，為Fargo的KVLY-TV11頻道所使用。高2063ft(628.8公尺)為目前世界上最高的建築物。

[编辑] 介紹

本天線塔於1963年8月13日興建完成；本塔曾被興建完成於1974年高646.38米高的華沙天線塔超越，但它於1991年8月8日倒塌，KVLY-TV天線塔重回地位。不過，本塔將被預計2009年完工的阿拉伯聯合大公國杜拜的杜拜塔超越。

[编辑] Overview

The tower is located three miles west of Blanchard, North Dakota, which is roughly halfway between Fargo and Grand Forks. It became the tallest artificial structure upon the completion of its construction on August 13, 1963. The mast was surpassed in height by 18 m (57 ft) in 1974 by the Warszawa radio mast near Konstantynów, Poland, but the latter collapsed on August 8, 1991, making the KVLY mast again the tallest structure on land. If completed as planned, the UAE's Burj Dubai, presently slated for completion in 2009, will surpass the mast as the tallest land structure.

The tower was built by Hamilton Directors and Kline Iron and Steel, and took thirty days to complete, at a cost of US$500,000 ($3.3 million in 2007 dollars).

Owned by the Meyer Broadcasting Company (now North Dakota Television, LLC) of Bismarck, the tower broadcasts at 316 kW for television station KVLY (channel 11, an NBC affiliate) which is based in Fargo. The tower provides a broadcast area of roughly 30,000 square miles (78,000 km²).

Its overall height above mean sea level is 926 m (3,038 ft). Some time after its completion, the Federal Aviation Administration imposed a limit of 2,063 ft, based on this tower's height, on future construction; consequently, no taller structures may legally be built in the U.S. at present.

The call letters of the television station for which it was built were originally KTHI, the "HI" referring to the height of the mast. The top is reachable by service elevator or ladder.