The Viaduct, once the longest and tallest railroad structure at 2,053 feet long and 301 feet high, was partially destroyed by a tornado during 2003. The 339-acre Kinzua Bridge State Park, located in McKean County, is the home of the reinvented Kinzua Viaduct. Penn State Extension’s Spotted Lanternfly website to learn how to identify it, report it, and inspect your vehicle or gear when traveling to and from the quarantine zone. Help us stay lanternfly free and stop the spread. To date, our park does NOT have these pests. The spotted lanternfly is an invasive insect that poses a serious threat to Pennsylvania’s resources, businesses, and economy.