The US Strategic Petroleum Reserve (SPR)

Many countries including the US have underground strategic gas & oil reserves. At present the US has 4 salt dome petroleum storage sites in Texas and Louisiana along the Gulf coast. Salt domes are convenient and inexpensive for underground storage of crude oil and gas. Salt mining has been done from underground workings of drifts and shafts employing underground miners. It has also been accomplished by hot water injection into the formation and retrieval of NaCl brine. Sometimes the salt dome...