Located in an isolated area between Houston and Beaumont, near the coast, this salt dome was developed in the 1980s into one of four that make up the Strategic Petroleum Reserve of the federal government. There are 14 solution-mined caverns in the dome, each around 2,000 feet tall and 200 feet around, and filled with 12 million gallons of crude oil, for a total of 170 million barrels, equivalent to a couple of weeks of national consumption.