10 Amazing Coincidences From History

The building of the Hoover Dam was bookended by two related deaths. On 20 December 1921, John Gregory Tierney died in a flash flood while surveying locations for the dam along the Colorado River.

96 people died during the construction of the dam, but John Tierney was the first.

Fourteen years later to the day, on 20 December 1935, the last person to die while working on the dam was Patrick William Tierney - John Tierney’s only son. Bad luck must be hereditary.