What is the oldest suspension bridge in the world that is still in service?
What is the oldest suspension bridge in the world that is still in service? Union Bridge (England/Scotland, 1820), the longest span (137 m) from 1820 to 1826. The oldest suspension bridge in the world still carrying road traffic.
What is the most unstable bridge?
The Hussaini Hanging Bridge in Pakistan was once so unsteady, it washed away and had to be rebuilt. It's been dubbed the most dangerous bridge in the world.
How did they stop the water from going over Niagara Falls?
28,000 tons of rock were off-loaded in total, creating a 600-foot-wide cofferdam upstream of the Falls. Once watertight, this dam diverted the flow of the Niagara River from American Falls towards the Horseshoe Falls.