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|View History: Monthly Download Data (XLS File)                              
|View History: Monthly                                                        
|View History: Monthly                                                        
|View History:                                                                
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|Minnesota Natural Gas in Underground Storage (Base Gas)  (Million Cubic Feet)
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|Minnesota Natural Gas in Underground Storage (Base Gas)  (Million Cubic Feet)
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|Year                                                                                                                              | Jan   | Feb   | Mar   | Apr   | May   | Jun   | Jul   | Aug   | Sep   | Oct   | Nov   | Dec  
|--------------------------------------------------------------------------------------------------------------------------------- | ----- | ----- | ----- | ----- | ----- | ----- | ----- | ----- | ----- | ----- | ----- | -----
|1990                                                                                                                              | 4,655 | 4,655 | 4,655 | 4,655 | 4,655 | 4,655 | 4,655 | 4,655 | 4,655 | 4,655 | 4,655 | 4,655
|1991                                                                                                                              | 4,655 | 4,655 | 4,655 | 4,655 | 4,655 | 4,655 | 4,655 | 4,655 | 4,655 | 4,655 | 4,655 | 4,655
|1992                                                                                                                              | 4,655 | 4,655 | 4,655 | 4,655 | 4,655 | 4,655 | 4,655 | 4,655 | 4,655 | 4,655 | 4,655 | 4,655
|1993                                                                                                                              | 4,655 | 4,655 | 4,655 | 4,655 | 4,655 | 4,655 | 4,655 | 4,655 | 4,655 | 4,655 | 4,655 | 4,655
|1994                                                                                                                              | 4,655 | 4,655 | 4,655 | 4,655 | 4,655 | 4,623 | 4,623 | 4,623 | 4,623 | 4,623 | 4,623 | 4,623
|                                                                                                                                 
|1995                                                                                                                              | 4,623 | 4,623 | 4,623 | 4,623 | 4,623 | 4,623 | 4,623 | 4,623 | 4,623 | 4,623 | 4,623 | 4,623
|1996                                                                                                                              | 4,623 | 4,623 | 4,623 | 4,623 | 4,623 | 4,623 | 4,623 | 4,623 | 4,623 | 4,623 | 4,623 | 4,623
|1997                                                                                                                              | 4,623 | 4,623 | 4,623 | 4,623 | 4,623 | 4,623 | 4,623 | 4,623 | 4,623 | 4,623 | 4,623 | 4,623
|1998                                                                                                                              | 4,623 | 4,623 | 4,623 | 4,623 | 4,623 | 4,623 | 4,623 | 4,623 | 4,623 | 4,623 | 4,623 | 4,623
|1999                                                                                                                              | 4,623 | 4,623 | 4,623 | 4,623 | 4,623 | 4,623 | 4,623 | 4,623 | 4,623 | 4,623 | 4,623 | 4,623
|                                                                                                                                 
|2000                                                                                                                              | 4,623 | 4,623 | 4,623 | 4,623 | 4,623 | 4,623 | 4,623 | 4,623 | 4,623 | 4,623 | 4,623 | 4,623
|2001                                                                                                                              | 4,840 | 4,840 | 4,840 | 4,840 | 4,840 | 4,840 | 4,840 | 4,840 | 4,840 | 4,840 | 4,840 | 4,840
|2002                                                                                                                              | 4,840 | 4,840 | 4,840 | 4,840 | 4,840 | 4,840 | 4,840 | 4,840 | 4,840 | 4,840 | 4,840 | 4,840
|2003                                                                                                                              | 4,840 | 4,840 | 4,840 | 4,840 | 4,840 | 4,840 | 4,840 | 4,840 | 4,840 | 4,840 | 4,840 | 4,840
|2004                                                                                                                              | 4,840 | 4,840 | 4,840 | 4,840 | 4,840 | 4,840 | 4,840 | 4,840 | 4,840 | 4,840 | 4,840 | 4,840
|                                                                                                                                 
|2005                                                                                                                              | 4,840 | 4,840 | 4,840 | 4,840 | 4,840 | 4,840 | 4,840 | 4,840 | 4,840 | 4,840 | 4,840 | 4,840
|2006                                                                                                                              | 4,840 | 4,840 | 4,840 | 4,840 | 4,840 | 4,840 | 4,840 | 4,840 | 4,840 | 4,840 | 4,840 | 4,840
|2007                                                                                                                              | 4,840 | 4,840 | 4,840 | 4,840 | 4,840 | 4,840 | 4,840 | 4,840 | 4,840 | 4,840 | 4,840 | 4,840
|2008                                                                                                                              | 4,840 | 4,840 | 4,840 | 4,840 | 4,840 | 4,840 | 4,840 | 4,840 | 4,840 | 4,840 | 4,840 | 4,840
|2009                                                                                                                              | 4,840 | 4,840 | 4,840 | 4,840 | 4,840 | 4,840 | 4,848 | 4,848 | 4,848 | 4,848 | 4,848 | 4,848
|                                                                                                                                 
|2010                                                                                                                              | 4,848 | 4,848 | 4,848 | 4,848 | 4,848 | 4,848 | 4,848 | 4,848 | 4,848 | 4,848 | 4,848 | 4,848
|2011                                                                                                                              | 4,848 | 4,848 | 4,848 | 4,848 | 4,848 | 4,848 | 4,848 | 4,848 | 4,848 | 4,848 | 4,848 | 4,848
|2012                                                                                                                              | 4,848 | 4,848 | 4,848 | 4,848 | 4,848 | 4,848 | 4,848 | 4,848 | 4,848 | 4,848 | 4,848 | 4,848
|2013                                                                                                                              | 4,848 | 4,848 | 4,848 | 4,848 | 4,848 | 4,848 | 4,848 | 4,848 | 4,848 | 4,848 | 4,848 | 4,848
|2014                                                                                                                              | 4,848 | 4,848 | 4,848 | 4,848 | 4,848 | 4,848 | 4,848 | 4,848 | 4,848 | 4,848 | 4,848 | 4,848
|                                                                                                                                 
|2015                                                                                                                              | 4,848 | 4,848 | 4,848 | 4,848 | 4,848 | 4,848 | 4,848 | 4,848 | 4,848 | 4,848 | 4,848 | 4,848
|2016                                                                                                                              | 4,848 | 4,848 | 4,848 | 4,848 | 4,848 | 4,848 | 4,848 | 4,848 | 4,848 | 4,848 | 4,848 | 4,848
|2017                                                                                                                              | 4,848 | 4,848 | 4,848 | 4,848 | 4,848 | 4,848 | 4,848 | 4,848 | 4,848 | 4,848 | 4,848 | 4,848
|2018                                                                                                                              | 4,848 | 4,848 | 4,848 | 4,848 | 4,848 | 4,848 | 4,848 | 4,848 | 4,848 | 4,848 | 4,848 | 4,848
|2019                                                                                                                              | 4,848 | 4,848 | 4,848 | 4,848 | 4,848 | 4,848 | 4,848 | 4,848 | 4,848 | 4,848 | 4,848 | 4,848
|                                                                                                                                 
|2020                                                                                                                              | 4,848 | 4,848 | 4,848 | 4,848 | 4,848 | 4,848 | 4,848 | 4,848 | 4,848 | 4,848 | 4,848 | 4,848
|2021                                                                                                                              | 4,848 | 4,848 | 4,848 | 4,848 | 4,848 | 4,848 | 4,848 | 4,848 | 4,848 | 4,848 | 4,848 | 4,848
|2022                                                                                                                              | 4,848 | 4,848 | 4,848 | 4,848 | 4,848 | 4,848 | 4,848 | 4,848 | 4,848 | 4,848 | 4,848 | 4,848
|2023                                                                                                                              | 4,848 | 4,848 | 4,848 | 4,848 | 4,848 | 4,848 | 4,848 | 4,848 | 4,848 | 4,848 | 4,848 | 4,848
|2024                                                                                                                              | 4,848 | 4,848 | 4,848 | 4,848 | 4,848 |       |       |       |       |       |       |      
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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: 7/31/2024                                                                                                          
|Next Release Date: 8/30/2024