PHOTO BY HUCK BEARD When it was completed in 1882, the Kinzua Viaduct in Mount Jewett was the longest and tallest railroad structure in the world. More than a century later, in 2003, the majority of the viaduct was destroyed by a tornado, but that was not the end of Kinzua. In many ways, it was only the beginning. The totaled viaduct was repurposed into a pedestrian walkway in 2011, drawing visitors from near and far to Kinzua Bridge State Park,…