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Edited on Wed Aug-31-05 11:21 PM by The Jacobin
Maybe that's them. I'll google real quick.
edit: From Wikipedia:
The Strategic Petroleum Reserve (SPR) is an emergency petroleum store maintained by the United States Department of Energy. It is the largest emergency supply in the world with the capacity to hold up to 727 million barrels (116 million m³) of crude oil.
Facilities
The reserve is stored at four sites on the Gulf of Mexico, each located near a major center of petrochemical refining and processing. Each site contains a number of artificial caverns created in salt domes below the surface. (Note: Capacity numbers may be out of date.)
* Bryan Mound - located near Freeport, Texas. Has a capacity of 226 million barrels (36,000,000 m²). * Big Hill - located near Winnie, Texas. Has a capacity of 160 million barrels (25,000,000 m²). * West Hackberry - located near Lake Charles, Louisiana. Has a capacity of 219 million barrels (35,000,000 m²). * Bayou Choctaw - located near Baton Rouge, Louisiana. Has a capacity of 72 million barrels (11,000,000 m²).
Individual caverns within a site can be up to 1000 m below the surface, average dimensions are 60 m wide and 600 m deep, and capacity ranges from 6 to 30 million barrels (1 to 5 million m³). Almost $4 billion was spent on the facilities. The decision to store in caverns was taken to reduce costs; the Dept. of Energy claims it is roughly 10 times cheaper to store oil below surface with the added advantages of no leaks and a constant natural churn of the oil due to a temperature gradient in the caverns. The caverns were created by drilling down and then dissolving the salt with water.
A fifth site, Weeks Island in Iberia Parish, Louisiana, had a capacity of 72 million barrels (11,000,000 m²), but was decommissioned in 1999. Unlike the other facilities, the Weeks Island caverns were a conventional near-surface salt mine, formerly owned by Morton Salt. In 1993, a sinkhole formed on the site, allowing fresh water to intrude into the caverns.
Because of the caverns' construction in salt deposits, fresh water would erode the walls, potentially causing the structure to fail. The caverns were 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.
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