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Regional Underground Natural Gas Storage, Close of 2007

  Depleted-Reservoir Storage Aquifer Storage Salt-Cavern Storage Total
Region/ State # of Sites Working Gas Capacity (Bcf) Daily Withdrawal Capability (MMcf) # of Sites Working Gas Capacity (Bcf) Daily Withdrawal Capability (MMcf) # of Sites Working Gas Capacity (Bcf) Daily Withdrawal Capability (MMcf) # of Sites Working Gas Capacity (Bcf) Daily Withdrawal Capability (MMcf)
Central Region      
Colorado        8 42 1,088 0 0 0 0 0 0 8 42 1,088
Iowa 0 0 0 4 77 1,060 0 0 0 4 77 1,060
Kansas             18 116 2,418 0 0 0 1 1 0 19 117 2,418
Missouri 0 0 0 1 11 350 0 0 0 1 11 350
Montana           5 196 310 0 0 0 0 0 0 5 196 310
Nebraska 1 16 169 0 0 0 0 0 0 1 16 169
Utah 1 51 427 2 1 100 0 0 0 3 52 527
Wyoming       7 45 227 1 1 75 0 0 0 8 46 302
    Total Sites 40 466 4,639 8 90 1,585 1 1 0 49 557 6,224
(Marginal Sites)1 (5) (2) (186) (0) (0) (0) (1) (1) (0) (6) (3) (186)
       
Midwest Region      
Illinois               11 52 833 18 249 5,294 0 0 0 29 301 6,136
Indiana            10 14 261 12 20 526 0 0 0 22 34 787
Michigan       43 641 16,786 0 0 0 2 2 85 45 643 16,871
Minnesota 0 0 0 1 2 60 0 0 0 1 2 60
Ohio                24 220 4,670 0 0 0 0 0 0 24 220 4,670
    Total Sites 88 927 22,549 31 271 5,855 2 2 85 121 1,200 28,524
(Marginal Sites)1 (10) (8) (258) (2) (4) (108) (0) (0) (0) (12) (12) (366)
       
Northeast Region      
Maryland 1 17 400 0 0 0 0 0 0 1 17 400
New York       23 116 1,696 0 0 0 1 1 145 24 117 1,841
Pennsylvania   50 406 8,615 0 0 0 0 0 0 50 406 8,615
Virginia 1 1 20 0 0 0 2 4 325 3 5 345
West Virginia   32 251 4,002 0 0 0 0 0 0 32 251 4,002
    Total Sites 107 791 14,733 0 0 0 3 5 470 110 796 15,203
(Marginal Sites)1 (7) (31) (43) (0) (0) (0) (0) (0) (0) (7) (31) (43)
         
Southeast Region         
Alabama 1 8 300 0 0 0 1 7 600 2 15 900
Kentucky       20 89 1,792 3 7 68 0 0 0 23 96 1,860
Mississippi 5 51 1,048 0 0 0 3 32 3,022 8 83 4,070
Tennessee 1 1 20 0 0 0 0 0 0 1 1 20
    Total Sites 27 149 3,160 3 7 68 4 39 4,115 34 195 6,850
(Marginal Sites)1 (4) (2) (24) (0) (0) (0) (0) (0) (0) (4) (2) (24)
       
Southwest Region         
Arkansas 2 15 231 0 0 0 0 0 0 2 15 231
Louisiana   8 286 3,965 0 0 0 7 48 3,165 15 334 7,130
New Mexico    2 54 375 0 0 0 0 0 0 2 54 375
Oklahoma     13 194 3,772 0 0 0 0 0 0 13 194 3,772
Texas           20 365 5,334 0 0 0 14 78 6,,361 34 443 11,695
    Total Sites 45 914 13,677 0 0 0 21 126 9,526 66 1,040 23,203
(Marginal Sites)1 (8) (30) (184) (0) (0) (0) (1) (4) (0) (9) (34) (184)
       
Western Region         
California 12 266 6,875 0 0 0 0 0 0 12 266 6,875
Oregon 7 15 497 0 0 0 0 0 0 7 15 497
Washington 0 0 0 1 22 850 0 0 0 1 22 850
    Total Sites 19 281 7,372 1 22 850 0 0 0 20 303 8,222
(Marginal Sites)1 (0) (0) (0) (0) (0) (0) (0) (0) (0) (0) (0) (0)
       
Total U.S. Sites 326 3,528 66,130 43 390 8,393 31 173 13,703 400 4,091 88,226
(Marginal Sites)1  (34) (73) (695) (2) (4) (108) (2) (5) (0) (38) (82) (803)
 
1Marginal sites: very little or no activity reported during the 2007 calendar year. However, these sites are included in regional and State summary totals.
Note: Bcf = Billion cubic feet.  MMcf = Million cubic feet. Totals may not sum due to independent rounding. 
Source:  Energy Information Administration, GasTran Natural Gas Transportation Information System, Underground Natural Gas Storage Database, December 2008.