The original Sunshine Skyway Bridge, a steel cantilever structure over Tampa Bay, opened on September 6th, 1954. By the early 1970s, however, it had become clear that it could no longer accommodate the surge in commuter and tourist traffic crossing Lower Tampa Bay. To address the mounting demand, the Florida Department of Transportation designed a companion span to carry southbound traffic, while the original 1954 bridge would be converted for northbound use.
The second span closely mirrored the alignment and structure of the first span. It took 54 months to complete, at a cost of $24.8 million. It officially opened to traffic on May 19, 1971, with a ceremony led by Governor Reubin Askew.
Despite using the same construction techniques and materials as the first span, including prestressed concrete piers and beams, engineers overlooked critical differences in the seabed beneath the new bridge’s main pier. Unlike the dense limestone that supported the original structure, the second span’s pier was set atop softer, less compacted material, causing it to settle unevenly. This led to a noticeable gap, nearly 20 feet long, between segments of the bridge. Extensive bracing, steel reinforcement and corrective engineering pushed the project two years beyond its original schedule and added another $3 million to the final cost.
Despite the setbacks, the expanded Sunshine Skyway Bridge was critical in managing Florida’s explosive growth. Between 1955 and 1970, annual traffic on the original span had more than tripled from just over 1 million to more than 3.3 million crossings. The new four-lane system significantly improved traffic flow and safety, supporting daily commutes and rising tourism throughout the Gulf Coast region. With the toll still set at 50 cents, the bridge quickly became a vital artery for regional transportation and a symbol of the state’s modern infrastructure ambitions.
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