List of catastrophic collapses of broadcast masts and towers
This is a list of catastrophic collapses of masts and towers.
Masts and towers can collapse as a result of natural disasters, such as storms and fires; from engineering defects; and from accidents, sabotage and bendover.
List of collapses
Location | Date | Mode of construction | Height (meters) |
Reason for collapse | Remarks |
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March 30, 1912 | Guyed steel lattice mast | 200 | Storm | The oldest continuously operating radio transmitting installation in the world. |
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1923 | ? | ? | Lightning | |
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November 25, 1925 | Guyed steel lattice mast | ? | Storm | Three towers collapsed |
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July 1926 | Guyed mast on roof top | ? | Guy cable rusted through | |
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1927 | Guyed steel lattice mast | 210 | Collapse at construction | |
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November 23, 1930 | Free standing wood lattice tower | 75 | Storm | Two towers snapped off 25 metres above ground |
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October 10, 1935 | Free standing wood lattice tower | 150 | Tornado | Replaced by triangle antenna |
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November 21, 1938 | Storm | |||
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1939 | Free standing wood lattice tower | 90 | Lightning | Replaced by steel tower |
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November 7, 1940 | Free standing lattice tower | 113 | Storm | |
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1949 | Guyed steel tube mast | 51 | Storm | Two masts of a triangle aerial |
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February 10, 1949 | Guyed steel lattice mast | 120 | Storm | |
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December 1949 | Guyed steel lattice mast | 198 | Storm | Partial destruction of a guyed mast under construction |
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March 11, 1955 | Steel lattice mast | Windstorm | WINP/WENS-TV. The lower part of the tower is still visible and in use. | |
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November 30, 1953 | Guyed steel tube mast | Aircraft collision | Former Michigan Governor Kim Sigler, who was piloting the plane, and three passengers were killed. | |
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1955 | Sabotage | Destroyed by EOKA rebels | ||
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April 3, 1956[3] | Guyed steel lattice mast | 100 | Aircraft collision | Hit by a B-29.[3] |
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January 1958 | Guyed steel tube mast | 50 | Icing | Replaced by concrete tower |
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1960 | Guyed lattice steel mast | 491 | Storm | Replaced by new mast of same height |
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1961 | Lattice Tower | 191 | Storm | Tower buckled at 2/3 of height. Tower carried radials (wires attached radially in a horizontal plane) on its top although it was not designed for them. |
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December 10, 1961 | Guyed steel lattice mast | ? | Terrorism | |
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1962 | Guyed steel lattice mast | 190 | Material fault | Slip of guy |
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October 12, 1962 | Guyed steel lattice mast | 180 | Storm | Columbus Day Storm |
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July 27, 1964 | Guyed steel lattice mast | 411 | Material fault | Replaced by a 214 m (704 ft)) tall mast radiator |
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1964 | Guyed steel lattice mast | 305 | Collapsed during construction | |
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1965 | Guyed steel lattice mast | 411 | Maintenance work | The collapsing mast also destroyed the transmitter building. Six persons were killed. |
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1965 | Guyed steel lattice mast | 200 | Mast collapsed during guy wire tension testing | |
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February 14, 1968 | Guyed steel lattice mast | 628 | Helicopter collision | |
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March 3, 1966 | Guyed steel lattice | 487 | F5 Tornado | Replaced with 609.3 m tower which collapsed in 1997 |
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September 28, 1966 | ? | 200 | Hurricane Kristen | Replaced with a temporary Antenna and moved to Yucuribampo Hill |
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November 17, 1966 | Guyed tubular steel mast | 290 | Storm: high winds causing oscillations in the mast structure | |
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August 27, 1967 | Guyed lattice steel mast | 161 | Aircraft collision | |
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June 24, 1968 | Guyed steel lattice mast | 609 | Airplane collision during thunderstorm | |
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November 17, 1968 | Guyed steel lattice mast | 524 | Collapse due to plane collision with guy wire | |
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January 17, 1969 | ? | Plane crash | ? | |
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March 19, 1969 | Guyed tubular steel mast | 385 | Ice | Replaced by 330 m free-standing concrete tower |
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July 12, 1970 | Guyed steel lattice mast | 250 | Lightning (Destruction of basement insulator) | |
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February 28, 1971 | Guyed steel lattice mast | 305 & 213 | Icing | Two towers collapsed |
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September 7, 1971 | Guyed steel lattice mast | 411 | Structural failure during construction | Seven technicians were killed while lifting the first of three large antenna sections into place at the top of the tower. |
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November 15, 1972 | Lattice steel tower | 243 | Storm | |
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June 8, 1973 | Guyed Steel Tower | 457 | Collapsed because of removal of load-bearing diagonals during FM antenna installation. | Multi-station tower supporting antennas of TV stations WDBO-TV, WFTV, and WMFE-TV, and radio stations WDBO-FM and WDIZ-FM – two workers on tower killed |
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October 4, 1973 | Guyed Steel Tower | 598 | Collapsed during modifications to tower. | Tower being modified prior to installation of Iowa Public Television side-mounted antenna – five workers on tower site killed |
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February 1974 | Guyed steel lattice mast | 218 | Terrorism | A slightly higher tower, 225m, has been built since. |
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1975 | Guyed steel lattice mast | 610 | Blizzard | |
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February 18, 1976 | Guyed steel lattice mast | 350 | Material fault | |
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December 2, 1976 | Concrete tower | ? | Storm | Storm tore pinnacle down |
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October 8, 1977 | Guyed steel lattice mast | 521 | Undetermined | 1709 feet HAAT. Erected November 17, 1964. Had elevator, RCA Travelling Wave pylon antenna for Channel 12 (System M), land mobile antennas, all lost. RCA contractor for erection, Stainless subcontractor. No definitive cause ever found for collapse. Speculation of "galloping guy lines" (mechanical standing waves in one of the guys), causing stress-to-failure in the guys due to rapidly alternating strain. |
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March 26, 1978 | Guyed steel lattice mast | 491 | Ice. The strain snapped 2-inch coupling bolts (24 of them) that joined the second and third sections. | In August 1969. This tower was one of the three tallest structures in the Northern Hemisphere and transmitter radiated the most powerful UHF-TV signal in the world. TV channel 14 (470-476 MHz). Collapsed Easter Sunday. 39°45′31″N 90°31′8″W |
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March 26, 1978 | Guyed steel lattice mast | 400 | Ice. Same ice storm that toppled WJJY. Upper section of antenna broke loose and fell through the guy wires. | WAND and WJJY used the same RCA UHF antennas, mfg in 1969. TV channel 17 (488-494 MHz) Collapsed Easter Sunday. |
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February 1978 | Guyed steel lattice mast | 457 | Ice | |
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May 21, 1978 | Guyed steel lattice mast | 352 | Aircraft collision | |
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September 7, 1977 | Guyed steel lattice mast | 305 | Aircraft collision | |
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1979 | Guyed mast of lattice steel | 305 | Icing | Mast was predamaged |
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December 27, 1979 | Guyed mast of lattice steel | 323 | Icing | Pinnacle with broadcasting antennas fell down, height afterwards 274 metres |
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October 8, 1980 | Guyed mast of lattice steel | 190 | Icing | Guy supports were improperly installed |
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Guyed mast of lattice steel | 88 | The guy support was made of polymer, which melted as a result of a high electric field strength storm, at the same time made mast collapse | ||
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July 31, 1981 | Lattice steel tower | 285 | Aircraft collision | Debris of the tower killed a couple in a house near the tower. |
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January 1982 | Guyed steel lattice mast | ? | Ice storm | |
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December 7, 1982 | Guyed steel lattice mast | 569 | Guy support wire severed | Total collapse during installation of 6-ton FM antenna on new 1800 ft. tower. Five technicians killed, Two on the hoist riding the FM antenna up and three on the tower. Determined insufficient sized bolts on the makeshift lifting lug extension failed. The falling debris severed one of the tower's guy wires which caused the tower to whip back and forth and collapse. |
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December 11, 1982 | Guyed steel lattice mast | 184 | Sabotage. Guy wires severed | |
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1983 | Guyed mast | 412 | Icing | |
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October 13, 1983 | Guyed mast | ? | Storm | |
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November 28, 1983 | Guyed steel lattice mast | 610 | Ice | |
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January 15, 1985 | Guyed steel tube mast | 298 | Ice | |
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February 14, 1986 | Self-supporting tower | 137 | High wind. | KYA transmitter placed in service in 1937. Failure may have resulted from tower leg insulator replacement where all-thread rod was not long enough to fully engage securing nut. |
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November 25, 1987 | Lattice steel tower | 92 | Force 8 storm | Tallest ever mast aboard any ship. It was replaced by horizontal wire antenna between two shorter masts. |
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December 26, 1987 | Lattice steel guyed tower | 582 | Ice storm | Listed at 1909 feet |
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1988 | Guyed mast on top of a concrete tower. | 323 | Icing | Replaced by 323-metre-tall (1,060 ft) partially guyed tower |
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June 2, 1988 | Guyed steel lattice mast | 610 | During repairs | Crew was replacing cross support beams at the 200 meter level. The mast broke at that spot, the bottom 200 meters fell to the south, the top fell straight down. All three workers on the mast were killed. |
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October 17, 1989 | ? | 91 | Earthquake | Three towers damaged |
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December 1989 | Two guyed steel tube framework masts | 609 | Ice | Unusually heavy ice concentrated at top predominantly on one side of towers caused asymmetrical load. Dislodged essentially as one piece during rapid warming; sudden unloading caused dynamic failure. |
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February 3, 1991 | Guyed steel lattice mast | Storm | ||
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March 23, 1991 | Guyed steel triangular tower | 259 | Ice and high wind | Freezing rain, accompanied at time with thunder, coated the city of Duluth with as much as six inches of ice. The 850-foot WDIO-TV tower was toppled as winds gusted to 40 mph, buffeting the heavily ice-covered tower. The tower fell onto a nearby utility line which provided power to the remainder of Duluth's television and FM radio stations, and all but one AM radio station. Telephone and power lines snapped leaving Duluth and many northeastern Minnesota communities without utility services for 24 hours. The DNR reported that four million pine trees were damaged or destroyed. - NOAA NWS Duluth, MN |
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August 8, 1991 | Guyed steel tube framework mast | 648 | Maintenance | Replacement by facility in Solec Kujawski |
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August 25, 1992 | Guyed steel tower | 549 | Hurricane Andrew | Rebuilt by LeBlanc Tower of Canada |
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1992 | Guyed mast (insulated) | 91 | Hurricane Andrew | Collapse of 2 masts |
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February 2, 1993 | Guyed steel lattice mast | 411 | Material fault | Fatigue failure of the eyebolt head in a compression cone insulator on structural guy caused swing-in damage, which resulted in structural collapse |
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February 25, 1993 | Guyed steel lattice mast | 191 | Snowstorm | Tower had construction faults |
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1996 | ? | 242 | Tornado | |
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September 2, 1996 | Guyed steel lattice mast | 160 | Maintenance | |
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October 12, 1996 | Guyed steel tower | 468 | Maintenance for DTV install | Three died when tower collapsed after a gin pole ran off its track and snapped a guy wire |
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1997 | Guyed steel lattice mast | 350 | Icing | Two masts collapsed |
250 | |||||
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April 6, 1997 | Guyed steel lattice mast | 628 | Ice | |
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March 20, 1997 | Guyed steel lattice mast | 606 | Maintenance | One killed, two injured when workers failed to install temporary braces |
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October 23, 1997 | Guyed steel lattice | 609 | Maintenance | Three killed - temporary braces failed during HDTV antenna upgrade |
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June 13, 1998 | Guyed mast | 293 | Tornado | |
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April 30, 1999 | Concrete tower (with observation deck) | 203 | Air raid (NATO bombardment, Kosovo war) | |
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April 25, 2000 | Guyed steel lattice mast | 198 | Helicopter crash | Three died when a medical helicopter hit a guy wire in clear weather and crashed |
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July 9, 2000 | Guyed steel lattice mast | 61 | Sabotage | Two towers collapsed |
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August 23, 2000 | Guyed steel lattice mast | 123 | Storm | ml |
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April 22, 2001 | Guyed steel lattice mast | 371 | Controlled implosion after aircraft crash caused serious damage | |
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June 6, 2001 | Guyed steel lattice mast carrying a T-antenna | 205 | Bad condition of support guys | |
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September 11, 2001 | Truses and Axis | 526 | Terrorist attack | Tower was destroyed as a result of the September 11 attacks in which a commercial airliner flew into the side of the building causing it and the broadcast tower to collapse under its own weight. |
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November 5, 2001 | Guyed steel lattice mast | 258 | Helicopter collision | |
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March 14, 2002 | Guyed steel tower | 503 | Airplane crash | |
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September 24, 2002 | Guyed steel lattice mast | 599 | Maintenance | Two workers killed, three injured on ground |
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February 19, 2003 | Guyed steel lattice mast | 473 | Ice | |
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February 19, 2003 | Guyed steel lattice mast | 200 | Ice | |
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May 4, 2003 | Free-standing steel lattice tower | 176 | Tornado | |
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May 10, 2003 | Free-standing steel lattice tower | ? | Tornado | Collapse of thee towers |
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July 2003 | Guyed steel lattice mast | 415 | Reconstruction work | |
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July 5, 2003 | Guyed steel lattice mast | 222 | Storm (derecho) | |
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September 4, 2003 | Guyed steel lattice mast | 305 | unknown | Three workers killed |
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September 8, 2003 | Guyed steel lattice mast | 45 | B | |
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September 16, 2004 | Guyed steel lattice mast | 131 | Hurricane Ivan | Replacement tower constructed shortly thereafter. Also knocked Clarke County, AL, Sheriff's Office off the air (KWO611) |
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September 16, 2004 | Guyed steel lattice mast | 518 | Storm | Hurricane Ivan |
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October 30, 2004 | Guyed steel lattice mast | 163 | Fire (suspected vandalism) | Temporary replacement mast constructed shortly thereafter. New permanent mast entered full service in February 2006. |
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December 19, 2004 | Guyed steel lattice mast | 195 | Aircraft collision | |
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February 27, 2005 | Guyed steel lattice mast | 538 | Replacement tower completed September 15, 2005. | |
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November 25, 2005 | Guyed steel lattice mast | 325 | Aircraft collision | All three aircraft occupants killed |
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February 3, 2006 | Guyed steel lattice mast | 329 | Undetermined | 1078 feet HAAT. Erected in 1981. No definitive cause ever found for collapse. Speculation was that the collapse was directly or indirectly related to the recent installation of their digital television antenna. The collapse destroyed the tower, KLTV's analog and digital antennas, KLTV's digital transmitter, and FM station KVNE's antenna. The analog transmitter was undamaged, and within a few days was moved to KLTV's backup tower in east Tyler. The collapse occurred the day after Raycom Media officially took ownership of the station. |
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August 23, 2006 | Guyed steel lattice mast | 174 | Maintenance | One person was killed |
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March 1, 2007 | Guyed steel lattice mast | 329 | EF3 tornado | Americus, Georgia, was struck by the tornado a few minutes later |
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March 2, 2007 | Guyed steel lattice mast | 230 | Guy wire anchor failure | Under construction. Also destroyed transmitter building. Was planned for a height of 1,036 ft (315.77 m).[5] |
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April 18, 2007 | Guyed steel tower | 136 | Structural failure | 400-foot transmitter tower located on Averil Peak, NY completely collapsed as a result of accumulation of ice and snow from the April 2007 Nor'easter. Partially damaged the transmitter building at the base. New tower erected and back in service Oct, 9 2007. |
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May 29, 2007 | Guyed steel lattice mast | 244 | Restoration work | |
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December 16, 2007 | Guyed steel lattice mast | 244 | Ice | Also damaged transmitter building and doppler radar.[6] |
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December 16, 2007 | Guyed steel lattice mast | 510 | Ice | 300 ft. section lost from top of tower [7] |
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January 11, 2008 | Guyed steel lattice mast | 609 | Maintenance | Restringing guy wires [8] |
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March 28, 2009 | Guyed steel lattice mast | 326 | Ice | |
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June 30, 2009 | Guyed steel lattice mast | 102 | Storm | Wind gust reportedly caused the mast to collapse during a severe storm |
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September 4, 2009 | Guyed steel lattice mast | ? | Terrorism | Two masts |
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January 30, 2010 | Guyed steel lattice mast | 86 | Sabotage | Guyed wires cut |
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March 22, 2011 | Guyed steel lattice mast | 609 | Rare event of all day Icing with high winds | Weather-related |
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July 15, 2011 | Guyed steel tube mast on concrete tower | 303 | Fire | Tubular steel superstructure collapsed, new steel lattice superstructure constructed (2012) on top of existing concrete base tower |
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August 8, 2012 | Guyed steel lattice mast | 280 | Ragged guy wire | Pinnacle and upper sections fell down |
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November 2, 2012 | Lattice tower | 30 | Collision with truck [9] | |
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September 20, 2013 | Guyed | 152 | Unknown | km |
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September 24, 2014 | Guyed | 200 | Corrosion | Mast collapsed during replacement of corroded leg at 160m. Four riggers killed.[10] |
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January 2, 2015 | Guyed | 60 | Storm | |
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May 15, 2016 | Guyed mast of lattice steel | 332 | Sabotage | Roughly half of the mast fell after guy wires had been sabotaged. |
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April 19, 2018 | Guyed | 597 | Maintenance | Six workers were performing routine maintenance at 105 ft on the tower when it collapsed, one worker was killed. |
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October 1, 2011 | Guyed | 210 | Fire | Fire started in a leftover deposit close to one of the guy wire anchors. |
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July 1, 2014 | Guyed steel lattice mast | 222 | Artillery shelling | During the final days of the siege of Sloviansk Ukrainian Government forces positioned on the Mount Karachun were shelled by the Russian proxies. As a result, the guyed wires failed and tower collapsed.[11] The new tower 50 m shorter was opened on December 5, 2016 in place of the destroyed one.[12] |
KOLN Tower Beaver Crossing, Nebraska, USA | January 18, 2020 | Guyed | 500.4 | ICE | During and ice and wind storm the tower collapses. This tower was known by anybody that drove by it and seen it from I-80. |
References
- "Radio_Normandy". 20 February 2011. Archived from the original on 20 February 2011.
- "WOAI San Antonio Texas - Engineering and Technology History Wiki". www.ieeeghn.org.
- "WOAI San Antonio Texas". Engineering and Technology History Wiki. Archived from the original on 4 July 2018. Retrieved 6 July 2018.
- "Tower Collapse Slows DTV Project - 3/12/2007 - Broadcasting & Cable".
- "'Story' Meets a Cow!". 18 August 2015.
- PAHomePage.com - Monday Morning WYOU and WBRE TV Signal Update
- "Cause of Tower Collapse Still Unknown-Channel 7 News". 11 May 2008. Archived from the original on 11 May 2008.
- "Pressemitteilung". 4 November 2012. Archived from the original on 4 November 2012.
- "Quatre morts à Logbessou après la chute d'un pylône de la CRTV".
- "На Карачуні під Слов'янськом обвалилася телевежа" (in Ukrainian). 2014-07-01.
- "На Карачуні відкрили телевежу" (in Ukrainian). 2016-12-05.
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