Jacksonville District, U.S. Army Corps of Engineers; Jacksonville Port Authority

Jacksonville's main shipping channel, a 23-mile stretch of the St. Johns River, extends from the river's mouth to the Jacksonville Port Authority Talleyrand Marine Terminal near downtown Jacksonville. The Water Resources Development Act authorized the deepening of Jacksonville's harbor from its current depth of -38 feet to a depth of -40 feet (to -41 ft in areas of limestone rock bottom) from the mouth of the St. Johns River to Drummond Point. Dredging included deepening of the west channel of JAXPORT's Blount Island Marine Terminal, taking the channel from -30 to -38 ft.