What is the minimum vertical clearance of the First Avenue South Bridge?

The minimum vertical clearance of the First Avenue South Bridge is indeed 22 feet. This specification is crucial for ensuring safe passage of marine vessels and vehicles underneath the bridge. Vertical clearance measurements are particularly relevant for navigable waterways, where taller boats need to pass without risking collision or damage. Factors such as the overall design of the roadway and the associated safety standards also dictate these measurements, ensuring that transportation can be conducted smoothly and without interruptions.

Although there are higher clearance options listed, the actual requirement is based on the engineering parameters established during the bridge's design and construction to accommodate typical vessel sizes and the topography of the riverbed, ensuring the bridge serves its intended purpose effectively.