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Montana. Dept. of Environmental Quality.

Understanding electricity in Montana : a guide to electricity, natural gas and coal produced and consumed in Montana (Volume 2002) online

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1977


48,181


46,819


0.719


33,663


1978


48,497


46.522


0.847


39,404


1979


56,094


53.888


1.211


65,258


1980


53,802


51.867


1.454


75,415


1981


58,502


56.565


1.909


107,983


1982


58.184


56,517


2.145


121,229


1983


53,516


51,967


2.410


125,240


1984


52,930


51,474


2.460


126,626


1985


54,151


52.494


2.390


125,461


1986


48.246


46.592


2.050


95,514


1987


47.845


46.456


1.800


83,621


1988


53.014


51,654


1.700


87,812


1989


52,583


51,307


1.550


79,526


1990


51,537


50.429


1.790


90,268


1991


53,003


51.999


1.660


86,318


1992


54,810


53.867


1.620


87,265


1993


55.517


54.528


1.550


84,518


1994


51.072


50,416


1.460


73,607


1995


50.763


50,264


1.360


68,359


1996


51.668


50,996


1.410


71,904


1997


53.621


52,437


1.590


83,375


1998


59.506


57,645


1.530


88,197


1999


61.545


61,163


1.680


102,754



Gross Withdrawal includes marketed production, plus quantities used in re-pressuring. plus quantities vented and llared Irom both gas and oil wells.

Marketed Production represents gross withdrawals of natural gas from gas and oil wells minus gas used for repressuring. nonhydrocarbon gases removed,
and quantities vented and flared. For 1979 and prior years, the volumes of nonhydrocarbon gases included in marketed production were not reported. For
1980 and 1981 , the amount of nonhydrocarbon gases removed was not available for the (Montana data, so the Department of Energy used the same figure for
Ivlontana's marketed production including nonhydrocarbon gases as is used for marketed production excluding nonhydrocarbon gases.

Average wellhead price is computed by dividing the gross value of the gas produced by the respective volume produced.
Sources: US. Department of Interior. Bureau of ti/lines. Mineral Industry, Natural Gas Production and Consumption Annual Report. 1950-75. U.S.
Department of Energy. Energy Information Administration. Natural Gas Production and Consumption Annual Report , 1976-79 (EIA-0131). U.S. Department of
Energy. Energy Information Administration. Natural Gas /Innua/, 1980-99 (EIA-0131).



III-15



Table NG2. Natural Gas Consumption by Customer Class, 1950-2000 (million cubic feet)



Year


Residential


Commercial'^


Industrial"


Utilities


Consumption


1950


12,596


7,536


13.979


892


38,333


1951


12,287


7,379


15.047


884


37,276


1952


12,263


7,794


17,422


998


41,545


1953


12.029


7,544


16,559


1,237


40,953


1954


13.314


8,277


14,909


601


41,002


1955


15.335


9,427


18,240


630


47,861


1956


15.235


9,314


18,226


876


48,305


1957


16,725


10,116


18,429


2,954


54,868


1958


14,970


9,546


18,960


3,183


54,725


1959


17,310


11,124


16.438


1,005


51,898


1960


16,825


11,820


19,558


339


54,271


1961


17,086


12,140


21,404


354


57,465


1962


17.078


12,302


21,713


3,692


62,952


1963


17,274


12.569


24.613


3,285


66,969


1964


18,792


13,059


26.419


2,437


67,282


1965


19,908


14,110


28,310


1 ,992


70,895


1966


19,690


14,068


29,571


2,977


73,829


1967


19,756


15,516


22,584


502


65,782


1968


19,711


13,651


23,155


631


63,642


1969


21,463


16,593


31,917


1,520


78,988


1970


24,794


18,564


36,105


2,529


90,823


1971


25,379


18,109


36,800


1,075


89,021


1972


23,787


19,151


33,192


1,218


85.161


1973


24,923


19,143


37,898


2,322


91,148


1974


21,590


16,602


35,202


1,111


80,766


1975


24,097


18,654


31,631


1,059


80,351


1976


23,525


17,831


31,049


709


78,094


1977


21,596


16,706


27,260


953


70,956


1978


22,944


17,766


26,686


909


72,649


1979


22,579


17,396


20,411


2.320


69,805


1980


19,296


14,265


16,717


4,182


60,724


1981


17.245


13,725


15,494


2,069


52,452


1982


19.989


15,987


11,574


337


52,208


1983


16,967


13,534


11,798


335


46,249


1984


18,443


14,256


9.855


360


46,864


1985


19,371


14,820


8,220


468


47,265


1986


16,822


12,536


7,507


407


41,148


1987


15,359


10,989


7,861


478


38,786


1988


16,900


12,041


8,360


286


41,825


1989


18,195


13,141


9,903


336


45,756


1990


16,850


12,164


9,424


418


43,169


1991


18,413


12,848


9,873


268


45,402


1992


16,673


11,559


12.218


220


45,561


1993


20,360


13,884


12,690


270


53,298


1994


18,714


12,987


13,940


632


52,058


1995


19,640


13,497


18,135


388


57,827


1996


22,175


14,836


18,103


470


61,399


1997


21,002


13,927


18,766


420


59,827


1998


19,172


12,961


21,416


522


59,817


1999


19,676


12,095


23,036


289


62,093


2000


19593


13,298


23,195


NA


66,542



NA: Not available due to problems with data reporting under utility deregulation.

Other consumers, including deliveries to municipalities and public authorities for institutional heating, street lighting, etc.. were
included in the industrial category prior to 1967. From 1967 on, other consumers were included in the Commercial category.
' Beginning with 1990 data. Commercial volumes include natural gas delivered for vehicular fuel use.

Industrial use includes refinery use of gas, but excludes pipeline fuel.
' Total Consumption includes total gas delivered to consumers, plus lease and plant fuel, plus pipeline fuel.

Sources: U.S. Depanment of Interior, Bureau of Mines. Mineral Industry Surveys, Natural Gas Production and Consumption , annual reports for
1950-75; U.S. Department of Energy. Energy Information Administration. Natural Gas Production and Consumption . annual reports for 1976-79
(EIA-0131); us. Department of Energy, Energy Information Administration, Natural Gas Annual , annual reports for 1980-99 (EIA-0131); U.S.
Department of Energy. Energy Information Administration, Natural Gas Monthly. Sept. 2001 and Feb. 2002.



III-16



Table NG3. Average Natural Gas Prices by Customer Class, 1950-2000





Price by Customer Class (doll


ars per thousand cubic feet)


Year


Residential


Commercial


Industrial


All Customers^


1950


0.473


0.328


0.142


0.301


1951


0.510


0.351


0.160


0.320


1952


0.507


0.352


0.192


0.324


1953


0.531


0.368


0.194


0.337


1954


0.589


0.415


0.201


0.388


1955


0.583


0.411


0.202


0.380


1956


0.585


0.412


0.206


0.382


1957


0.583


0.413


0.208


0.380


1958


0.647


0.443


0.218


0.401


1959


0.647


0.457


0.267


0.456


1960


0.660


0.464


0.274


0.454


1961


0.655


0.459


0.257


0.438


1962


0.752


0.506


0.251


0.464


1963


0.746


0.507


0.268


0.462


1964


0.763


0.533


0.303


0.495


1965


0.781


0.541


0.311


0.506


1966


0.779


0.543


0.304


0.495


1967


0.796


0.571


0.341


0.546


1968


0.822


0.603


0.326


0.554


1969


0.882


0.643


0.338


0.562


1970


0.907


0.659


0.339


0.572


1971


934


0.685


0.357


0.603


1972


0.965


0.691


0.381


0.630


1973


1.086


0.804


0.425


0.698


1974


1.119


0.926


0.580


0.804


1975


1.296


1.101


0.949


1.089


1976


1.364


1.187


0.930


1.164


1977


1.816


1.584


1.558


1.641


1978


1.894


1.646


1.642


1.720


1979


2.213


2.002


1.749


2.004


1980


3.053


3.117


3.143


3.182


1981


3.754


4.138


4.258


4.057


1982


4.460


4.874


5.488


4.829


1983


4 627


5.065


3.990


4.561


1984


4.861


5.242


5.173


5.025


1985


4.813


5.094


4.706


4.845


1986


4.446


4.476


3.913


4.312


1987


4.410


4.340


3.420


4.160


1988


4.300


4.300


3.080


4.040


1989


4.370


4.360


2 980


4.080


1990


4.590


4.640


3.270


4.260


1991


4.520


4.350


3.220


4.160


1992


4.800


4.460


4.190


4.510


1993


4.920


4.670


2.760


4.250


1994


5.230


4.910


4.910


4.990


1995


5.150


4.920


4.870


4.980


1996


4.860


4.640


4.880


4.790


1997


5.050


4.830


4.790


4.900


1998


5.250


5.130


4.680


4.960


1999


5.160


5.130


3.440


4.420


2000


5.930


5.860


4.290


5.240



1 Average prices were computed by dividing the annual value of natural gas consumed by a customer class by the respective annual
volume of natural gas consumed.
The All Customers category includes all the consumers in Table NG2.

Sources: U.S. Department of the Interior, Bureau of Mines, Mineral Industry Surveys, Natural Gas Production and Consumption . annual
reports for 1 950-75; U.S. Department of Energy, Energy Information Administration, Natural Gas Production and Consumption , annual
reports for 1976-79 (EIA-0131): U.S. Department of Energy, Energy Information Administration, Natural Gas Annual, annual reports for
1980-1999 {EIA-0131); U.S. Department of Energy, Energy Information Administration, Natural Gas Monthly, Sept. 2001 (EIA-0131).



III-17



Table NG4. Average Natural Gas Consumption and Annual Cost per
Consumer. 1980-1999^





Residential


Commercial


Industrial^




Average


Average


Average


Average


Average






Consumption


Annual


Consumption


Annual


Consumption


Annual


Year


(Mcf)


Cost
(dollars)


(Mcf)


Cost
(dollars)


(Mcf)


Cost
(dollars)


1980


117


356


670


2,089


32,841


103218


1981


104


389


610


2,523


31.364


133,551


1982


121


538


780


3,800


24,013


131,770


1983


102


470


651


3,298


25,048


99,956


1984


110


534


679


3,558


21,013


108,703


1985


115


555


706


3,595


17,908


84,267


1986


100


445


597


2,672


16,869


66.006


1987


91


404


514


2,231


18.072


61,806 E


1988


98


423


541


2,329


19.219


59.195 E


1989


106


464


591


2,579


23,138


68,951 E


1990


97


444


521


2,419


20,622


67,434 E


1991


104


468


554


2,411


21,842


70,331 E


1992


91


439


490


2,185


26.620


-


1993


108


-


569


-


27,469


-


1994


96


~


512


-


30,773


-


1995


96


-


512


-


39.168


-


1996


108


~


562


-


38.848


-


1997


100


-


507


-


40,619





1998


88


~


462


-


47,172


-


1999


-


-


425


-


58,025


-



Estimate
' Starting in 1993, figures were no longer given for average cost. Starting in 1999, residential average
consumption was no longer given.

^ Beginning in 1987, industrial costs per consumer are estimated by DEQ using Department of Energy
average prices of deliveries to industrial customers times industrial consumption volumes. The
Department of Energy did not calculate these numbers in national statistics because values associated
with gas delivered for the account of others are not always available. However, those values are not
considered to be significant in Montana.

Source: United States Department of Energy, Energy Information Administration, Natural Gas
Annual, annual reports for 1980-99 (ElA-0131).



III-18



Table NG5. Regulated Sales^ of Natural Gas by Gas Utilities,* 1950-2000 (million cubic feet)

Note: The gas sales numbers in this table are significantly lower than the total gas consumption numbers in Table NG2 tor several reasons. First,
these sales data are taken from annual reports filed by utilities to the Montana Public Service Commission The way utilities report gas sales to the
PSC IS drfterent from the way in which Table NG2 total consumption numbers are calculated by the U.S. Energy Information Administration. Also,
much of Industrial consumption since 1991 is not reported in this table due to different reporting requirements and processes used by utilities since
deregulation. These include the practice of not reporting gas used for pipeline transportation. This table does not include gas sales sold to other
utilities for resale in Montana, lease and plant fuel, pipeline fuel, or fuel used by utilities





MONTANA POWER COMPANY'


MONTANA-DAKOTA UTILITIES'




Residential








% of Total


Residential








% of Total


Year


and
Commercia


Industrial


Other


Total


Montana
Sales


and
Commercial


Industrial


Other


Total


Montana
Sales


1950


7,909


8,852


NA


16.761


54 2"i


4,228


240


469


4.937


16.0%


1951


8,076


12,970


NA


21.046


59 3%


5,514


1,180


499


7.193


20.3%


1952


8.435


13.760


NA


22.195


62.0%


7,340


1,845


468


9,653


25 9%


1953


8,229


13.624


NA


21.853


61.9%


7.223


1,863


480


9,566


27.1%


1954


8,737


12,225


NA


20.962


59-3%


7,912


1,649


495


10,056


284%


1955


11,231


15,511


NA


26,742


63 9%


7,594


1,996


533


10,123


24.2%


1956


11,100


15,584


NA


26,684


63 4°1


7,708


2,212


509


10,429


24.8%


1957


12,584


15.527


NA


28,111


64 4';i


7.797


2,056


492


10,345


237%


1958


12,391


15.173


NA


27,564


62 7%


7.429


3,233


551


11,213


25 5%


1959


14.401


12.629


NA


27,030


596%


8.678


2,934


507


12,119


26 7%


1960


14,533


15.462


NA


29,995


62,3%


8.516


3,148


342


12,006


25.0%


1961


14.517


16.654


NA


31,171


62,7%


8,689


3,606


177


12,472


25.1%


1962


15.133


18.080


NA


33.213


64 1%


9,148


3,051


103


12,302


237%


1963


14.893


19.666


NA


34.559


64.6%


8.826


3,862


79


12,767


23,9%


1964


16,853


20,958


NA


37.811


64.1%


9.620


4,587


55


14,362


24 4%


1965


17,977


22,195


NA


40,172


63.9%


10.955


4,430


61


15,446


24 6%


1966


17,731


23.058


NA


40,789


65 2%


10.414


4,256


55


14,725


23.5%


1967


18.027


20.766


NA


38,793


645'^'.


10.584


3,813


67


14,464


24,0%


1968


19,063


21.650


NA


40.713


646%


10.847


4,523


65


15,435


24.5%


1969


19,891


25.536


NA


45.427


64,2%


11.534


6,277


55


17,866


253%


1970


20,398


26,006


NA


46,404


62 9%


11,499


8,582


102


20,183


27 3%


1971


18,956


25.581


1,628


46,165


62.9%


11,612


8,317


139


20,068


27 3%


1972


20.068


26.128


1,491


47.687


62.4%


12,352


8,218


600


21,170


27,7%


1973


19.771


25.915


1,578


47.264


62 3°'o


11.525


8,685


1,415


21,623


28 5%


1974


18.931


26,301


1,408


46.640


63 4%


11.230


6,455


588


20.273


27 6%


1975


20,762


24,130


1.523


46.415


62.5%


12.779


7,774


NA


20.553


27.7%


1976


18,795


20.663


1.405


40.863


61.0%


12,208


7,100


NA


19.307


28 8%


1977


18,413


18.101


1,451


37.965


61 4"^,


11,898


5,923


NA


17.821


28 8%


1978


18,696


17,280


1,498


37.475


60.5%


13.784


3,981


NA


17,765


28.7%


1979


19,142


16,118


2,737


37.997


620%


13.500


3,480


NA


16,981


27 7%


1980


17,091


12,655


4.986


34,733


62.9%


11.332


3,627


NA


14,959


27 1%


1981


15,216


9,758


2.754


27,727


57.8%


10,312


5,307


NA


15,618


32 6%


1982


17,032


7,064


1,317


25.413


54.6%


12,228


4,148


60


16.436


35.3%


1983


14,606


6,829


1.152


22.587


54 8%


10.181


3,774


32


13.987


34 0%


1984


16.075


5 967


1.238


23.280


563%


10.744


2,451


59


13.254


32,1%


1985


16,916


6.043


1.271


24,230


58 3%


11.094


1,336


19


12,449


29.9%


1986


14,461


5,208


1.099


20,768


58 6%


9.191


607


15


9,813


27 7%


1987


14,090


5.358


748


20,196


62.6%


7.712


254


15


7,981


24,7%


1988


15,027


6.652


732


22,410


63 2%


8,285


475


17


8.776


24 8%


1989


16,771


7,050


771


24,592


64.0%


9.069


161


17


9,247


24 1%


1990


15,915


6.057


744


22,715


64.5%


8.192


54


17


8.262


235%


1991


16,522


4.980


683


22,185


62.2%


9.074


12


11


9,096


25 5%


1992


18,541


672


221


19,534


60,4%


8,290


4


13


8,307


25.7%


1993


21,216


756


1481


23.453


60 4%


9.927


12


8


9,947


256%


1994


19,680


603


499


20.782


59 5%


9.258


3


10


9,271


26 5%


1995


20,900


616


517


22,033


60 8%


9.345


NA


NA


9,345


25,8%


1996


23,414


681


599


24.694


61.1%


10,891


NA


NA


10,891


26.9%


1997


22.465


619


488


23,572


60,4%


10,148


NA


NA


10,148


26 0%


1998


19,298


309


294


19.901


58.4%


8.906


NA


NA


8,906


26 1%


1999


18,277


281


244


18.802


57 8%


8.906


NA


NA


8,906


27 4%


2000


18,382


211


282


18.875


58,1%


9,301


NA


NA


9301


28.6%



III-19



Table NG5. (continued)





GREAT FALLS GAS COMPANY/ ENERGY WEST*


OTHER UTILITIES'


TOTAL SALES'




Residential








% o( Total


Total for all
Sectors


% of Total


Residential








Year


and


Industrial


Other


Total


Montana


Montana


and


Industrial


Other


TOTAL




Commercial








Sales


Sales


Commercial








1950


2,509


208


53


2.770


9.0°'o


6.481


20 9<'.4


21,127


9.300


522


30.949


1951


2.697


311


191


3.199


90%


4.055


1 1 .4%


20.342


14.461


690


35,493


1952


2.566


228


333


3.127


87%


852


2.4%


19.193


15.833


801


35,827


1953


2.478


238


350


3.066


8.7%


814


2,3%


18.744


15,725


830


35,299


1954


2.795


255


400


3.450


9.8%


892


2.5%


20.336


14,129


895


35,360


1955


3.284


243


434


3.961


9.5%


1,049


2.5%


23.158


17.750


967


41,875


1956


3.361


204


396


3.961


9.4%


1,019


2.4%


23.188


18,000


905


42,093


1957


3,510


258


451


4.219


9.7%


955


2 2%


24.846


17,841


943


43,630


1958


3.365


268


475


4,108


9.3%


1.067


2.4%


24.252


18,674


1.026


43.952


1959


4.048


388


566


5.002


1 1 0%


1.175


26%


28.302


15,951


1,073


45.326


1960


3.928


512


516


4,956


10.3%


1,152


2.4%


28,129


19.122


858


48.109


1961


4.067


380


606


5,053


10.2%


1,045


2.1%


28,318


20,640


763


49,741


1962


4.092


371


752


5,215


101%


1,078


2.1%


29.451


21,502


855


51.808


1963


4.030


396


793


5.219


9.8%


945


1.8%


28.694


23.924


872


53,490


1964


4.446


480


847


5.773


9.8%


1,018


1.7%


31.937


26.125


902


58,964


1965


4,767


499


868


6.134


9.8%


1,160


laro


34.859


27.124


929


62,912


1966


4.593


490


846


5.929


9.5%


1,125


18%


33.863


27,804


901


62,568


1967


4.505


397


856


5.758


9.6%


1,160


1.9%


34,276


24.976


923


60175


1968


4.504


424


852


5.780


9.2%


1,074


17%


35.488


26.597


917


63.002


1969


5,042


412


891


6,345


9,0%


1,118


16%


37,585


32.225


946


70.756


1970


4,926


378


902


6.206


8.4%


1,010


1 4°.i


37,833


34.966


1,004


73,803


1971


4.901


367


895


6.163


8.4%


1.048


1 4%


36,517


34,265


2,662


73,444


1972


5.185


353


884


6,422


8.4%


1,105


1 4°i


38,710


34,699


2,975


76,384


1973


4.729


414


864


6,007


7.9%


982


1,3%


37,007


35,014


3.857


75.876


1974


4.504


412


807


5,723


7 8%


936


13%


35,601


35,168


2,803


73,572


1975


5.145


354


845


6,344


8.5%


1.000


1.3%


39.686


.1?,?58


2,368


74,312


1976


4.875


237


892


6,004


9.0%


762


1.1%


36.640


28.000


2,297


66,935


1977


4.317


246


734


5.297


8.6%


715


1.2%


35.343


24.270


2,185


61,798


1978


4.818


196


826


5.840


9.4%


824


1 3%


38.122


21.457


2,324


61.904


1979


4.512


249


750


5.512


9.0%


804


1 3%


37.958


19.847


3,487


61.294


1980


3.888


266


689


4.842


8.8%


669


1.2%


32,980


16.548


5,675


55,203


1981


3.257


169


619


4,044


8,4%


573


1.2%


29,358


15.234


3,373


47,962


1982


3.289


188


627


4.104


88%


596


1.3%


33,145


11.460


1,944


46,549


1983


3.320


206


636


4.162


101%


446


1,1%


28.553


10.809


1,820


41.182


1984


3.531


256


530


4.317


10.4%


487


1.2%


30.837


8,674


1,827


41,338


1985


3.719


181


536


4.436


10.7%


474


1.1%


32.203


7,560


1,826


41,589


1986


3,538


285


592


4.415


12:5%


465


1.3%


27.655


6.100


1,706


35,461


1987


3064


193


442


3.699


11.5%


388


12%


25.254


5.805


1,205


32,264


1988


3.189


170


499


3.858


10.9%


386


1,1%


26.887


7.296


1,247


35,431


1989


3.567


160


411


4.138


10 8%


427


1.1%


29.834


7.371


1,199


38,404


1990


3,381


78


401


3.860


11.0%


392


1.1%


27.879


6.169


1,162


35,230


1991


3,435


164


389


3.988


11.2%


400


1.1%


29.430


5.156


1,083


35,669


1992


4.139





NA


4,139


12.8%


373


1.2%


31,443


676


234


32,353


1993


4.478





490


4,968


12.8%


432


1.1%


36.053


768


1.979


38,800


1994


3.971





478


4.449


12.7%


443


13%


33.352


606


987


34,945


1995


3.942





464


4.406


12.2%


447


1.2%


34,634


616


981


36,231


1996


4.362





NA


4.362


108%


498


1.2%


39,165


681


599


40,445


1997


4,496





314


4,810


12.3%


504


1.3%


37,613


619


802


39,034


1998


3.535





1331


4.866


14.3%


418


1.2%


32,157


309


1.625


34,091


1999


3.401





996


4.397


13.5%


427


1,3%


31.011


281


1.240


32,532


2000


3.058





1009


4,067


12.5%


239


0.7%


30.980


211


1,291


32,482


NA


Not Available
























See notes on Idlowing page.





















III-20



Table NG5. (continued)

' Sales to other utilities for resale and sales of natural gas to Canada are not included.

^ From 1950 to 1970. government and municipal sales were reported in the "Residential and Commercial" sector.
"Other" includes interdepartmental use, sales to government and municipal authorities tor heating, and special off-line sales
to fimis in f^lontana where these figures are reported separately.

The following 3 lines from Fran Balkovetz at MPC:

III iw I 1^ wiieii iviri., s oa:> uiiiiiy bidiieu ueieyuidiiiiy iib t;ubiLnnei>>. hih a lesuit. iiieie iieive ueeri uiiaiiyeb in iimabuieu b(iitf:> nicuiuuuiuyy iiuni

1991 until present. This created differences after 1991 in how MPC's data is reported and is part of the reason why the numbers in the "industnal'
column decrease so sharply in 1992. It is very hard to reconcile these differences and thus the 1990's numbers are given as presented in Schedule

In 1992, some customers in the industnal' category left MPC as a result of deregulation

In 1992 and 1993. Schedule 35 was not reported like m later years. In 1992. figures used are from Actual Billed Volumes supplied by Fran
Balkovetz at MPC

* Prior to 1975 "Other" includes interdepartmental use and natural gas used in MDU's electnc generating plants at Baker.


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