This bridge was built after the problem of cable vibration was well understood. Many earlier cable stayed bridges had problems with the stay cables vibrating during light rain showers. Older bridges had to be retrofit with a dampening mechanisms. On the Harsha Bridge, the cables were encased in a plastic tube. That tube has a small ridge on it that spirals around the tube for its full length. The ridge provides a small amount of lift that disturbs the air around the cables just enough where the vibration will not get started. This was an extremely cheap solution to a problem that has proven to be very costly to some earlier cable stayed bridge operators.
William H. Harsha was a Congressman from Ohio from 1961 to 1981.