Arch bridges are one of the oldest types ... by the sheer force of their own weight. The New River bridge Today materials like steel and pre-stressed concrete have made it possible to build ...

"I knew it was time for Columbus to move into the next century with this bridge. It was exciting just looking at it." ...

FRITZ: THERE ARE RIGHT IN THIS LITTLE AREA OF WOODSVILLE, NEW HAMPSHIRE, FOUR HISTORICALLY IMPORTANT BRIDGES. TWO SPAN THE CONNECTICUT RIVER. YOU ARE LOOKING AT THE OLDEST STEEL ARCH BRIDGE IN THE ...