Over time, as other discoveries were made, The Freeport Sulphur Company also used the Port Sulphur facility to support their other Frasch Process sulphur mines located at Garden Island Bay, LA; Lake Pelto, LA; Caillou Island, LA; a land based mine at Chacahoula, LA; The first offshore sulphur mines at Grand Isle, LA and Caminada Pass, LA; and a large operation 50 miles offshore from the Mississippi River Delta in 300 feet of water, at Main Pass Block 299 in the Gulf of Mexico.
