Instead of pushing straight down, the weight of an arch bridge is carried outward along the curve of the arch to the supports at each end. These supports, called the abutments, carry the load and ...

Instead of pushing straight down, the weight of an arch bridge is carried outward along the curve of the arch to the supports at each end. These supports, called the abutments, carry the load and ...

When the third arch arrives and is hoisted in place in early February, the bridge will be considered structurally complete. That allows Amtrak approximately one year to install overhead catenary ...