The Carl D. Perkins Bridge is a cantilever bridge that spans the Ohio River between Portsmouth, Ohio and Greenup County, Kentucky. The bridge carries the two lanes of State Route 852 and Truck Route U.S. Highway 23. The bridge connects to Kentucky Route 8. During the demolition of the original U.S. Grant Bridge and the construction of its replacement upstream, it was the only highway bridge connecting Ohio to Kentucky at Portsmouth. The Perkins Bridge also served as a detour for U.S.