<Ul> <Li> Weeks Island - Iberia Parish, Louisiana (decommissioned 1999). Capacity of 72 million barrels (11,400,000 m). This facility was a conventional room and pillar near - surface salt mine, formerly owned by Morton Salt . In 1993, a sinkhole formed on the site, allowing fresh water to intrude into the mine . Because of the mine's construction in salt deposits, fresh water would erode the ceiling, potentially causing the structure to fail . The mine was backfilled with salt - saturated brine . This process, which allowed for recovery of 98% of the petroleum stored in the facility, reduced the risk of further freshwater intrusion, and helped prevent the remaining oil from leaking into the aquifer that is located over the salt dome . </Li> </Ul> <Li> Weeks Island - Iberia Parish, Louisiana (decommissioned 1999). Capacity of 72 million barrels (11,400,000 m). This facility was a conventional room and pillar near - surface salt mine, formerly owned by Morton Salt . In 1993, a sinkhole formed on the site, allowing fresh water to intrude into the mine . Because of the mine's construction in salt deposits, fresh water would erode the ceiling, potentially causing the structure to fail . The mine was backfilled with salt - saturated brine . This process, which allowed for recovery of 98% of the petroleum stored in the facility, reduced the risk of further freshwater intrusion, and helped prevent the remaining oil from leaking into the aquifer that is located over the salt dome . </Li> <P> Access to the reserve is determined by the conditions written into the 1975 Energy Policy and Conservation Act (EPCA), primarily to counter a severe supply interruption . The maximum removal rate, by physical constraints, is 4.4 million barrels per day (700,000 m / d). Oil could begin entering the marketplace 13 days after a presidential order . The Department of Energy says it has about 59 days of import protection in the SPR . This, combined with private sector inventory protection, is estimated to equal 115 days of imports . </P> <P> The SPR was created following the 1973 energy crisis . The EPCA of December 22, 1975, made it policy for the U.S. to establish a reserve up to 1 billion barrels (159 million m3) of petroleum . A number of existing storage sites were acquired in 1977 . Construction of the first surface facilities began in June 1977 . On July 21, 1977, the first oil--approximately 412,000 barrels (65,500 m) of Saudi Arabian light crude--was delivered to the SPR . Fill was suspended in Fiscal Year 1995 to devote budget resources to refurbishing the SPR equipment and extending the life of the complex . The current SPR sites are expected to be usable until around 2025 . Fill was resumed in 1999 . </P>

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