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Montana Natural Gas Underground Storage Capacity (Million Cubic Feet)
Montana Natural Gas Underground Storage Capacity (Million Cubic Feet)
Year Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
  2002 371,510 371,510 371,510 371,510 371,510 371,510 371,510 371,510 371,510 371,510 374,125 374,125
  2003 374,125 374,125 374,125 374,125 374,125 374,201 374,201 374,201 374,201 374,201 374,201 374,201
  2004 374,201 374,201 374,201 374,201 374,201 374,201 374,201 374,201 374,201 374,201 374,201 374,201
  2005 374,201 374,201 374,201 374,201 374,201 374,201 374,201 374,201 374,201 374,201 374,201 374,201
  2006 374,201 374,201 374,201 374,201 374,201 374,201 374,201 374,201 374,201 374,201 374,201 374,201
  2007 374,201 374,201 374,201 374,201 374,201 374,201 374,201 374,201 374,201 374,201 374,201 374,201
  2008 374,201 374,201 374,201 374,201 374,201 374,201 374,201 374,201 374,201 374,201 374,201 374,201
  2009 374,201 374,201 374,201 374,201 374,201 374,201 374,201 374,201 374,201 374,201 374,201 376,301
  2010 376,301 376,301 376,301 376,301 376,301 376,301 376,301 376,301 376,301 376,301 376,301 376,301
  2011 376,301 376,301 376,301 376,301 376,301 376,301 376,301 376,301 376,301 376,301 376,301 376,301
  2012 376,301 376,301 376,301 376,301 376,301 376,301 376,301 376,301 376,301 376,301 376,301 376,301
  2013 376,301 376,301 376,301 376,301 376,301 376,301 376,301 376,301 376,301 376,301 376,301 376,301
  2014 376,301 376,301 376,301 376,301 376,301 376,301 376,301 376,301 376,301 376,301 376,301 376,301
  2015 376,301 376,301 376,301 376,301 376,301 376,301 376,301 376,301 376,301 376,301 376,301 376,301
  2016 376,301 376,301 376,301 376,301 376,301 376,301 376,301 376,301 376,301 376,301 376,301 376,301
  2017 376,225 376,225 376,225 376,225 376,225 376,225 376,225 376,225 376,225 376,225 376,225 376,225
  2018 376,225 376,225 376,225 376,225 376,225 376,225 376,225 376,225 376,225 376,225 376,225 376,225
  2019 376,225 376,225 376,225 376,225 376,225 376,225 376,225 376,225 376,225 376,225 376,225 376,225
  2020 376,225 376,225 376,225 376,225 376,225 376,225 376,225 376,225 376,225 376,225 376,225 376,225
  2021 376,225 376,225 376,225 376,225 376,225 376,225 376,225 376,225 376,225 376,225 376,225 376,225
  2022 376,225 376,225 376,225 376,225 376,225 376,225 376,225 376,225 376,225 376,225 376,225 376,225
  2023 376,225 376,225 376,225 376,225 376,225 376,225 376,225 376,225 376,225 376,225 376,225 376,225
  2024 376,225 376,225 376,225 376,225 376,225 376,225 376,225 376,225 376,225 376,225 376,225 376,225
  2025 376,225 376,225 376,225 376,225 376,225 376,225 376,225

- = No Data Reported;  -- = Not Applicable;  NA = Not Available;  W = Withheld to avoid disclosure of individual company data.
Release Date: 9/30/2025
Next Release Date: 10/31/2025

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