The $328 million Sanibel Causeway restoration project by the Superior-de Moya Joint Venture team has successfully rebuilt the critical lifeline between Sanibel Island and mainland Florida, enhancing storm resilience and reestablishing vital access for residents, emergency services and businesses.
Superior Construction photo
An aerial photo of the completed causeway, 2025.
The Superior-de Moya Joint Venture (JV) team has substantially completed the $328 million Sanibel Causeway restoration project, re-establishing and fortifying the critical 3-mi. lifeline between Sanibel Island and mainland Florida that was devastated by Hurricane Ian on September 28, 2022.
"What makes this project special is that we've given this community infrastructure they can rely on through whatever comes next," said Toby Mazzoni, project manager of Superior Construction. "We build for the long haul, especially when communities are counting on us most."
When Hurricane Ian destroyed the causeway in 2022, Sanibel and Captiva Islands were completely cut off, paralyzing the tourism-dependent economy and leaving residents stranded. The emergency response team restored temporary access in just 15 days, enabling first responders to reach the islands and allowing residents to begin recovery efforts.
The project marked the Florida Department of Transportation's first phased design-build contract and highlighted the JV team's innovative approach, enabling emergency and permanent repairs to start while the design was still in development. The JV team successfully navigated complex logistics while maintaining traffic flow throughout construction.
"The Joint Venture team overcame this project's logistical challenges with tenacity," said Superior Construction CEO Nick Largura. "Building five seawalls during the hurricane season, railing in high-quality armor stone materials from Alabama and Georgia quarries and improving resilience, while collaborating with multiple stakeholders on a first-of-its-kind phased design-build contract, is a monumental feat. I'm incredibly proud of this team."
At peak construction, the JV team coordinated multiple specialized crews simultaneously: three for pile-driving, four for earthwork, two for storm drainage, six for rebar tying, eight for concrete placement and three for asphalt paving, all while keeping two lanes of traffic open for island residents and visitors.
The rebuilt causeway now features dramatically enhanced storm resilience, including:
● Steel sheet pile wall systems: nearly 750,000 sq. ft. (26,200,750 lbs), including a king pile wall system, with lengths varying from 20 to 70 ft.;
● concrete caps: approximately 19,750 linear ft. total: 4,930 ft. of retaining wall concrete caps; 8,460 ft. of island wall concrete caps; and 6,360 ft. of sea wall concrete caps.
● 127,996 tons of strategically placed armor stone;
● elevated seawalls from 5 ft. to 8 ft.;
● advanced stormwater drainage systems throughout the causeway;
● 19,500 tons of asphalt pavement placed;
● innovative scour prevention system using 25,225 sq. yds. of gabion marine mattress and 79,000 tons of coastal rip rap and bedding stone.
● 6,900 linear ft. of various permanent roadway concrete barriers; and
● 25,000 sq. ft. of fractured fin concrete fascia.
The project's resilience was put to the test during construction in 2024 when Hurricanes Debby, Helene and Milton struck Florida. Completed sections withstood these storms intact, while unfinished areas experienced washouts, providing real-world validation of the JV team's engineering approach.
The causeway's completion marks a significant milestone in Sanibel Island's recovery from Hurricane Ian and strengthens the community's defense against future storms. With this critical infrastructure restored, emergency services can now reliably reach the island, residents have secure mainland access, and tourism-dependent businesses can fully resume operations, revitalizing the island community for generations to come.
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