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|View History: Monthly Download Data (XLS File)                       
|View History: Monthly                                                 
|View History: Monthly                                                 
|View History:                                                         
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|Tennessee Natural Gas Underground Storage Volume  (Million Cubic Feet)
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|Tennessee Natural Gas Underground Storage Volume  (Million Cubic Feet)
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|Year                                                                                                                              | Jan   | Feb   | Mar   | Apr   | May   | Jun   | Jul   | Aug   | Sep   | Oct   | Nov   | Dec  
|--------------------------------------------------------------------------------------------------------------------------------- | ----- | ----- | ----- | ----- | ----- | ----- | ----- | ----- | ----- | ----- | ----- | -----
|1997                                                                                                                              | 0     | 0     | 0     | 0     | 0     | 0     | 0     | 0     | 0     | 0     | 0     | 0    
|1998                                                                                                                              | 799   | 683   | 623   | 539   | 539   | 539   | 673   | 807   | 919   | 1,022 | 1,126 | 1,127
|1999                                                                                                                              | 996   | 872   | 741   | 661   | 658   | 802   | 909   | 985   | 1,089 | 1,194 | 1,251 | 1,195
|                                                                                                                                 
|2000                                                                                                                              | 1,031 | 855   | 792   | 729   | 711   | 711   | 711   | 711   | 711   | 760   | 874   | 959  
|2001                                                                                                                              | 963   | 903   | 830   | 761   | 865   | 978   | 1,009 | 1,072 | 1,118 | 1,180 | 938   | 937  
|2002                                                                                                                              | 987   | 988   | 990   | 990   | 965   | 962   | 949   | 945   | 942   | 940   | 852   | 852  
|2003                                                                                                                              | 744   | 634   | 566   | 519   | 554   | 630   | 705   | 800   | 803   | 848   | 848   | 787  
|2004                                                                                                                              | 684   | 633   | 621   | 652   | 685   | 731   | 794   | 849   | 854   | 879   | 867   | 826  
|                                                                                                                                 
|2005                                                                                                                              | 784   | 704   | 605   | 524   | 483   | 466   | 466   | 466   | 428   | 419   | 413   | 400  
|2006                                                                                                                              | 392   | 392   | 384   | 384   | 384   | 384   | 384   | 384   | 384   | 384   | 384   | 384  
|2007                                                                                                                              | 384   | 384   | 384   | 384   | 384   | 384   | 384   | 384   | 384   | 384   | 384   | 384  
|2008                                                                                                                              | 384   | 384   | 384   | 384   | 384   | 384   | 384   | 384   | 384   | 384   | 384   | 384  
|2009                                                                                                                              | 384   | 384   | 384   | 384   | 384   | 384   | 384   | 384   | 384   | 384   | 384   | 384  
|                                                                                                                                 
|2010                                                                                                                              | 384   | 384   | 384   | 384   | 384   | 384   | 384   | 384   | 384   | 384   | 384   | 384  
|2011                                                                                                                              | 384   | 384   | 384   | 384   | 384   | 384   | 384   | 384   | 384   | 384   | 384   | 340  
|2012                                                                                                                              | 340   | 340   | 340   | 340   | 340   | 340   | 340   | 340   | 340   | 340   | 340   | 340  
|2013                                                                                                                              | 340   | 340   | 340   | 340   | 340   | 340   | 340   | 340   | 340   | 340   | 340   | 340  
|2014                                                                                                                              | 340   | 340   | 340   | 340   | 340   | 340   | 340   | 340   | 340   | 340   | 340   | 340  
|                                                                                                                                 
|2015                                                                                                                              | 1,544 | 1,448 | 1,457 | 1,505 | 1,558 | 1,606 | 1,666 | 1,726 | 1,790 | 1,883 | 1,985 | 2,039
|2016                                                                                                                              | 2,014 | 2,020 | 2,052 | 2,069 | 2,095 | 2,130 | 2,130 | 2,125 | 2,123 | 2,157 | 2,167 | 2,094
|2017                                                                                                                              | 2,063 | 2,049 | 2,054 | 2,083 | 2,116 | 2,116 | 2,149 | 2,138 | 2,180 | 2,212 | 2,206 | 2,139
|2018                                                                                                                              | 2,035 | 2,010 | 2,040 | 2,083 | 2,179 | 2,254 | 2,337 | 2,395 | 2,393 | 2,370 | 2,311 | 2,173
|2019                                                                                                                              | 2,092 | 2,086 | 2,062 | 2,099 | 2,179 | 2,224 | 2,273 | 2,368 | 2,368 | 2,368 | 2,359 | 2,347
|                                                                                                                                 
|2020                                                                                                                              | 2,122 | 2,050 | 2,023 | 2,022 | 2,065 | 2,095 | 2,130 | 2,200 | 2,200 | 2,249 | 2,247 | 2,224
|2021                                                                                                                              | 2,202 | 2,103 | 2,110 | 2,112 | 2,168 | 2,219 | 2,219 | 2,219 | 2,219 | 2,219 | 2,205 | 2,171
|2022                                                                                                                              | 2,056 | 1,995 | 1,950 | 1,924 | 1,925 | 1,976 | 2,034 | 2,083 | 2,128 | 2,177 | 2,126 | 1,974
|2023                                                                                                                              | 1,974 | 1,926 | 1,880 | 1,901 | 1,987 | 2,080 | 2,176 | 2,353 | 2,278 | 2,278 | 2,273 | 2,297
|2024                                                                                                                              | 2,263 | 2,254 |       |       |       |       |       |       |       |       |       |      
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|- = No Data Reported;  -- = Not Applicable;  NA = Not Available;  W = Withheld to avoid disclosure of individual company data.
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|Release Date: 4/30/2024                                                                                                          
|Next Release Date: 5/31/2024