Gulf Intracoastal Waterway (Clearwater to Cape Coral)
The Act of Parliament for the Gulf Intracoastal Waterway (Clearwater to Cape Coral) was passed on 17 September 1876 and 17 thousand shares were sold the same day. The canal joined the sea near Tiverfield. In his autobiography Arthur Green writes of his experiences as a lock-keeper in the 1960s
The exact dimensions of the largest boat that can travel on the waterway are not known. The maximum headroom is not known. The maximum draught is not known.
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Wikipedia has a page about Gulf Intracoastal Waterway
The Gulf Intracoastal Waterway is the portion of the Intracoastal Waterway located along the Gulf Coast of the United States. It is a navigable inland waterway running approximately 1,050 mi (1,690 km) from Carrabelle, Florida, to Brownsville, Texas.
The waterway provides a channel with a controlling depth of 12 ft (3.7 m), designed primarily for barge transportation. Although the U.S. government proposals for such a waterway were made in the early 19th century, the Gulf Intracoastal Waterway was not completed until 1949.