View History:  Monthly  
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Montana Natural Gas Underground Storage Volume (Million Cubic Feet)
Montana Natural Gas Underground Storage Volume (Million Cubic Feet)
Year Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
  1990 293,785 290,491 289,197 288,193 293,815 288,808 290,947 293,015 295,663 296,921 295,421 290,602
  1991 289,270 287,858 286,548 286,491 287,718 288,959 290,667 292,107 292,226 290,844 288,112 284,559
  1992 281,148 279,325 278,909 279,042 280,038 280,751 281,777 282,543 282,117 280,760 277,412 271,811
  1993 266,711 262,291 259,532 257,822 256,665 255,940 257,149 257,450 257,904 257,816 253,710 250,503
  1994 246,679 239,940 238,777 237,993 238,931 240,738 242,090 243,176 244,948 245,981 244,275 241,603
  1995 238,103 236,109 235,420 236,218 237,498 239,637 242,554 245,760 246,856 246,301 243,255 238,004
  1996 231,752 228,315 224,438 223,794 223,014 225,717 228,978 232,480 235,999 235,664 230,909 225,405
  1997 219,754 215,770 213,180 211,370 212,216 213,848 216,558 218,897 220,386 219,372 216,611 213,443
  1998 209,021 206,467 203,450 203,226 205,797 207,821 210,115 214,639 218,878 220,410 217,805 213,891
  1999 208,983 205,609 203,199 201,870 202,438 204,223 206,017 208,559 210,031 209,512 208,323 205,649
  2000 201,572 198,381 196,217 195,597 195,074 195,530 197,552 199,805 200,747 200,722 197,005 191,838
  2001 187,630 183,126 181,496 181,498 184,400 188,433 193,956 198,923 203,775 205,348 204,857 200,967
  2002 197,840 195,075 191,473 190,762 192,640 196,556 203,147 208,332 212,624 212,554 210,641 207,167
  2003 202,814 198,083 194,417 194,596 195,637 197,357 199,674 201,657 203,208 204,794 202,090 198,607
  2004 193,200 188,296 185,637 185,584 187,204 189,613 193,529 198,039 203,960 207,155 206,607 201,485
  2005 195,622 191,940 189,003 189,917 192,649 196,353 200,523 203,856 206,175 207,265 206,464 201,606
  2006 198,538 194,410 191,970 195,270 201,820 208,271 214,492 220,011 225,774 228,277 224,587 219,499
  2007 213,359 207,756 204,431 204,520 208,240 212,001 216,699 220,723 223,044 224,804 224,031 218,214
  2008 210,930 204,890 200,029 197,448 198,190 199,704 202,434 205,738 208,953 209,196 207,634 201,009
  2009 194,662 190,859 187,492 190,603 199,813 208,045 216,440 225,591 233,583 237,646 241,355 233,643
  2010 226,390 220,007 219,139 225,640 233,553 238,426 243,639 248,326 251,113 249,877 244,885 237,359
  2011 229,490 222,171 216,389 214,812 214,922 216,801 219,925 223,229 225,775 227,357 224,786 219,804
  2012 213,967 209,245 208,567 211,946 215,047 219,392 223,751 228,054 231,837 232,604 230,434 224,126
  2013 216,809 211,649 207,638 205,601 207,626 210,385 214,435 219,447 224,995 224,335 218,817 211,200
  2014 204,180 196,835 191,139 189,334 191,458 193,609 196,461 198,532 200,485 202,227 198,539 195,193
  2015 190,605 187,291 187,463 188,812 191,357 194,485 197,870 201,315 203,416 204,466 202,011 198,390
  2016 193,997 191,940 192,710 196,653 201,855 206,763 210,023 213,488 215,679 216,461 214,059 205,755
  2017 198,679 194,637 193,444 195,454 199,519 203,701 207,260 209,652 213,744 214,556 210,624 203,205
  2018 196,187 189,718 185,370 185,960 190,044 194,067 198,238 202,704 205,155 202,676 199,076 195,975
  2019 191,272 185,041 183,547 185,368 188,082 192,306 196,093 199,718 203,679 202,804 200,239 195,332
  2020 189,231 183,893 182,785 185,140 190,763 196,957 202,092 206,208 211,052 212,963 209,543 202,523
  2021 195,280 188,575 185,347 186,407 189,279 192,968 196,841 202,073 207,586 209,676 207,156 200,320
  2022 192,967 186,862 183,613 185,336 190,541 196,401 201,709 207,204 212,138 214,264 209,140 202,145
  2023 197,203 191,579 187,443 190,030 195,497 201,455 207,415 211,100 213,730 214,635 212,147 207,166
  2024 199,909 194,584 190,545 194,910 201,457 208,796 215,066 219,791 224,618 226,244 222,571 216,393

- = No Data Reported;  -- = Not Applicable;  NA = Not Available;  W = Withheld to avoid disclosure of individual company data.
Release Date: 1/31/2025
Next Release Date: 2/28/2025

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