Estimates of Peak Underground Working Gas Storage Capacity in the United States, 2009 Update (Released, 8/31/2009)

Estimates of Peak Underground Working Gas Storage Capacity in the United States (Released, 10/7/2008)

Estimate of Maximum Underground Working Gas Storage Capacity in the United States: 2007 Update (Released, 10/24/2007)

Estimates of Maximum Underground Working Gas Storage Capacity in the United States (Released, 09/19/2006)