Top Ten Construction Failures
10.)
Tower of Pisa
No
list of construction failures would be complete without this iconic
engineering mishap. A mere three meter foundation and weak subsoil
contributed to a nearly 5.5 degree lean until preservation crews were
called in to help lessen the instability. The tower’s top is still
more than 3.9 meters off center.
9.)
Tacoma Narrows Bridge
Opened
in1940, the bridge was the third longest suspension bridge in the
world before it collapsed in dramatic fashion just four months later.
Sustained 40 mph winds caused a phenomenon known as aeroelastic
flutter, resonating violently with the structure until the roadway
broke apart and fell hundreds of feet into the gorge below.
8.)
Hubble
One
of the crowning achievements of the space age, the Hubble Space
Telescope launched with a defective mirror that severely inhibited
the quality of the incredibly expensive instrument’s imaging
capabilities. Several servicing missions had to be flown to correct
the issue, and Hubble ended up costing U.S. taxpayers nearly $6
billion – up from an original $400 million.
7.)
Lotus Riverside Complex
In
2009, a recently completed residential building collapsed nearly
intact in Shanghai, killing one construction worker. A lengthy probe
pointed to excavated earth being dumped nearby, which caused a river
bank to collapse and saturate the surrounding soil, causing the
instability. The eleven remaining structures in the project were
immediately investigated.
6.)
New York City Crane Collapse
A
2008 crane collapse in a downtown NYC neighborhood resulted in the
deaths of six construction workers and another female bystander.
Investigators determined that instead of the recommended eight safety
straps, negligent crews had installed only four, worn straps, leading
to the deadly failure.
5.)
Hyatt Regency Walkway
During
a tea dance in July of 1981, dozens of people gathered on an aerial
walkway of the less than year-old hotel, before a catastrophic
structural failure sent hundreds hurtling down four floors onto
crowds of hundreds below. More than 200 people were injured and 114
lost their lives.
4.)
Chicago Crib
As
crews were working on a water intake tunnel for Chicago in 1909, a
fire broke out on a water crib in the middle of winter, killing 60
workers and badly burning dozens of others, with many drowning or
succumbing to hypothermia as they tried to escape the flames.
3.)
Quebec City Bridge
The
1907 construction of the Quebec City Bridge across the St. Lawrence
River ended tragically after officials ignored the fact that initial
calculations for the bridge were off by more than 8 million pounds.
75 workers lost their lives when the structure finally failed and
plunged into the river below.
2.)
Willow Island Cooling Tower
A
430-foot power plant cooling tower, under construction in 1978, was
severely behind schedule, resulting in a number of shortcuts and
oversights that led to a collapse claiming 51 lives. Unset concrete
and poorly constructed scaffolding were the main factors behind the
structural failure.
1.)
Teton Dam
While
many of these construction failures resulted in tragic loss of life,
they have helped shape the safety procedures and guidelines that have
saved countless lives over the years.
The
Teton Dam, for example, was an earthen dam built by the federal
government in southeastern Idaho which broke apart upon its first
filling on June 5th, 1976. The rushing waters from the catastrophic
failure killed 11 people and drowned more than 13,000 head of cattle,
with damages estimated up to $2 billion.
Permeable
soil and cracked foundations were blamed for the dam’s collapse,
which allowed more than 2,000,000 cubic feet of water per second to
careen into the Teton River canyon, emptying the reservoir within
hours. The Dam’s failure prompted a round of more stringent
regulations governing similar projects across the United States.
Comments