Arch bridges are one of the oldest types of bridges and have great natural strength. Instead of pushing straight down, the weight of an arch bridge is carried outward along the curve of the arch ...

The Skew Arch Bridge, built in 1896 with an idiosyncratic design that spans a gorge in West Fairmount Park, was neglected for decades as its bricks became loose or fell out.

Arch bridges are one of the oldest types of bridges and have great natural strength. Instead of pushing straight down, the weight of an arch bridge is carried outward along the curve of the arch ...