Department of the Gulf north. On November 3, 1863, the northern boundary was extended to latitude 33° north. On July 25, 1863, the department/district was transferred to the Department of Mississippi and Eastern Louisiana. It remained in that department only until January 28, 1864, when it was transferred to the Department of Alabama and Eastern Mississippi. Upon being transferred, the department/district boundaries were redefined as beginning at the mouth of the Pearl River, running north to latitude 32° north, east to the Georgia State line and south to the Gulf of Mexico. On May 8, 1864, the boundary was again modified to define the
Offshore oil and gas in the Gulf of Mexico (United States) water in 1962; and in a thousand feet of water in 1979. "By 1970, the technology existed to drill in 2,000 feet of water and actual exploratory drilling was taking place at 1,400 feet." By 2009, more than 70% of Gulf of Mexico oil production came from wells drilled in depths greater than , almost double from the percentage ten years ago. The deepest water depth in which a discovery has been made is , at Lloyd Ridge 370 (Diamond). The federal government has not allowed drilling in federal waters in the eastern Gulf of Mexico, which includes offshore Florida