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The Sanibel Causeway is a causeway in Southwest Florida that spans the San Carlos Bay, connecting Sanibel Island with the Florida mainland in Punta Rassa. The causeway consists of three separate two-lane bridge spans, and two man-made causeway islands between them. The entire causeway facility is owned by Lee County and operated by the Lee County Department of Transportation. The entire causeway is three miles long from end to end, and currently has a $6 toll in effect for island-bound vehicles only. The bridges are not individually named, and are simply referred to as bridges A, B, and C. ==History== As early as 1912, automobile ferries serviced Sanibel Island from the mainland at Punta Rassa. The idea of building a bridge from the mainland to the island was highly controversial amongst the early residents of the island, as many thought a bridge would ruin the beauty and isolated feel of the island. Although, one of the largest proponents of building a bridge was island resident Hugo Lindgren who saw the island's potential and tried to convince Lee County to build a bridge. Despite the opinions of the islanders, it was clear that the ferries were insufficient by the mid 1950s as demand increased leading to long lines of vehicles waiting to cross the bay. Wildfires on the island in 1955 further convinced the county to build a bridge as it would improve access to the island for firefighters. An early proposal would have had a bridge running from Point Ybel (where Sanibel Lighthouse is currently located) to the mainland, since it was the shortest route. Although the current route was ultimately selected due to the bay being shallower and two causeway island could be created by dredging. While Bailey Road was then selected as the terminus of the bridge on the island, Hugo Lindgren granted the county right-of-way through his property on the bay, which the county accepted.〔 Construction on the entire causeway and the three original bridges lasted 15 months and cost $2.73 million. It was the last major project designed by Hector F.J. Estrup, Civil Engineer, owner of Caribbean Engineers. The Sanibel Causeway was completed and opened for traffic on May 26, 1963. Due to the causeway, Sanibel Island experienced major growth in the early 1970s leading to Sanibel's incorporation into Lee County's third city, which took place on November 5, 1974. Former CIA director Porter Goss served as Sanibel's first mayor. By the early 1990s, the original bridges began showing signs of rapid deterioration due to the bay's salt water, prompting the county made to make major repairs. As a result, Lee County briefly proposed the idea of replacing the bridges with a single four-lane high-span bridge. Although, the idea was abandoned due to opposition from island residents. Further repairs were made in 1997 as rapid deterioration from overall lack of maintenance and salt water corrosion continued. In 2001, the county made plans to replace Bridges B and C, and make major repairs to Bridge A (the drawbridge). In early 2003, during a routine inspection, severe cracks were discovered underneath a deck section on Bridge B. After this discovery, all three of the bridges were very closely monitored, and the damaged section was braced with additional steel pilings. Bridge B's speed limit was temporarily lowered to , and the rest of the causeway's speed limit was lowered to . A temporary 10-ton weight limit was put in place. Lee County determined that the deck section needed to be completely replaced as soon as possible. After extensive preparations, the causeway was shut down all day on January 20, 2003. The deck section was replaced with a steel grate section. The replacement was completed quickly, and the causeway re-opened ahead of schedule. After this turn of events, Lee County reexamined it original plan for rehabilitating Bridge A (the drawbridge), and concluded that all three of the bridges needed to be replaced as soon as possible. Once it was decided to replace the drawbridge, a debate on replacing it with another drawbridge versus a high-span bridge commenced. The county wanted a high-span, while a number of Sanibel residents wanted another drawbridge. Shortly before construction was set to begin on the high-span bridge, the city filed a lawsuit against the Lee County in an attempt to stop construction. Sanibel claimed that Lee County did not maintain the bridges properly, and used the toll revenue for other road projects. Lee County then filed a counter lawsuit, claiming Sanibel was interfering with construction. A second lawsuit against Lee County was filed by a group of Sanibel residents who created a non-profit organization called "Save Our Bay, Inc." All of the lawsuits delayed construction, and were eventually dismissed. On August 13, 2004, the area was struck by Hurricane Charley, a Category 4 hurricane. The causeway received only minor damage and was very carefully inspected before Sanibel residents were permitted to return to the island. Construction of the current bridges commenced in August 2004. The three dollar toll was increased to six dollars in November 2004 in order to finance construction. Construction on the current spans lasted three years, and cost $137 million. An official grand-opening ceremony for the current bridges was held on September 8, 2007, which was the day the current Bridge C opened (even though the current Bridges A and B opened prior to September 8). The original bridges were later demolished, and their remains were sunk into the water to create a number of artificial reefs in the San Carlos Bay and the Gulf of Mexico. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Sanibel Causeway」の詳細全文を読む スポンサード リンク
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