51. Dual Failures of the Quebec Bridge
Year: 1907/1916
Location: Canada
Company: Theodore Cooper (consulting engineer)/Frants Lichtenberg (chief engineer)
Estimated Damage Value: $1.5 million*
In 1907 and 1916, the Quebec Bridge in Canada fell disastrously, causing significant human and financial losses. Initially resulting in 75 deaths due to a structural failure, a second collapse occurred despite prior warnings, claiming 13 more lives.

Initial oversight by Theodore Cooper led to a tragic collapse in 1907. A second, avoidable disaster in 1916 saw the central span fall, killing 13. This occurred under Frants Lichtenberg’s watch, who neglected multiple warnings about the bridge’s instability.