Historical Energy Statistics

Colstrip Units 1 - 4

These statistics on energy production and consumption were assembled as part of studies DEQ prepared for the Legislature’s Environmental Quality Council. The texts of the reports may be found at Understanding Energy In Montana. These tables contain the most current version of the statistics and may include corrections and updates made after the document was published.

Energy Source Workbooks 

  • Natural Gas Tables Workbook - 2016 Update
  • NG1 - Natural Gas Production and Average Wellhead Price, 1960-2016 
  • NG2 - Natural Gas Consumption by Customer Class, 1960-2015 (million cubic feet) 
  • NG3 - Average Delivered Natural Gas Prices by Customer Class, 1960-2016 
  • NG4 - Total Number of Customers, Average Natural Gas Consumption, and Annual Cost per Consumer by Customer Class 1980-2015 
  • NG5 - Regulated Sales of Natural Gas by Gas Utilities,* 1960-2015 (million cubic feet unless otherwise noted) 
  • NG6 - Largest Natural Gas Users in Montana as of 2017