===============================================================================
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                   FORM 10-K/A
                                Amendment No. One
(Mark One)
/X/      ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES
         EXCHANGE ACT OF 1934 FOR THE FISCAL YEAR ENDED DECEMBER 31, 2000 OR

/ /      TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES
         EXCHANGE ACT OF 1934 FOR THE TRANSITION PERIOD FROM _____ TO _____.


                           Commission File No. 1-8796


                               QUESTAR CORPORATION
--------------------------------------------------------------------------------
             (Exact name of registrant as specified in its charter)


         State of Utah                                               87-0407509
--------------------------------------------------------------------------------
(State or other jurisdiction of                               (I.R.S. Employer
 incorporation or organization)                             Identification No.)


180 East 100 South, P.O. Box 45433, Salt Lake City, Utah             84145-0433
--------------------------------------------------------------------------------
(Address of principal executive offices)                             (Zip code)

Registrant's telephone number, including area code:              (801) 324-5000
                                                                ----------------


           SECURITIES REGISTERED PURSUANT TO SECTION 12(b) OF THE ACT:


                                                           NAME OF EACH EXCHANGE
           TITLE OF EACH CLASS                               ON WHICH REGISTERED
           -------------------                             ---------------------
                                                      
           Common Stock, Without Par Value, with         New York Stock Exchange
           Common Stock Purchase Rights


           SECURITIES REGISTERED PURSUANT TO SECTION 12(g) OF THE ACT:
                                      None

         Indicate by check mark whether the registrant (1) has filed all reports
required to be filed by Section 13 or 15(d) of the Securities Exchange Act of
1934 during the preceding 12 months (or for such shorter period that the
registrant was required to file such reports), and (2) has been subject to such
filing requirements for the past 90 days.   Yes X   No
                                               ---    ---
         Indicate by check mark if disclosure of delinquent filers pursuant to
Item 405 of Regulation S-K is not contained herein and will not be contained, to
the best of registrants' knowledge, in definitive proxy or information
statements incorporated by reference in Part III of this Form 10-K or any
amendment to this Form 10-K.   /X/

         The aggregate market value of the registrant's common stock, without
par value, held by nonaffiliates on March 1, 2001, was $2,167,204,320 (based on
the closing price of such stock).

         On March 1, 2001, 80,647,952 shares of the registrant's common stock,
without par value, were outstanding.

DOCUMENTS INCORPORATED BY REFERENCE. Portions of the definitive Proxy Statement
for the 2001 Annual Meeting of Stockholders are incorporated by reference into
Part III. The sections of the Proxy Statement labeled "Committee Report on
Executive Compensation" and "Cumulative Total Shareholder Return" are expressly
not incorporated into this document.





                                TABLE OF CONTENTS



HEADING                                                                                                        PAGE
                                                                                                            
                                                       PART II

Item 6.   SELECTED FINANCIAL DATA................................................................................. 2

Item 7.   MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF
          OPERATION............................................................................................... 3

Item 7A.  QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK............................................. 14

                                                       PART IV

Item 14.  EXHIBITS, FINANCIAL STATEMENT SCHEDULES,
          AND REPORTS ON FORM 8-K................................................................................ 17

SIGNATURES....................................................................................................... 55




ITEM 6. SELECTED FINANCIAL DATA (RESTATED)



                                                      2000         1999          1998         1997         1996
                                                   -----------------------------------------------------------------
                                                             (In Thousands, Except Per Share Amounts)
                                                                                           
Revenues                                           $1,266,153     $924,219      $906,256     $936,337     $817,981
Operating expenses
  Cost of natural gas and other products sold         562,229      352,554       367,932      399,941      314,271
  Operating and maintenance                           251,477      221,082       208,190      205,723      196,389
  Depreciation, depletion and amortization            142,491      132,164       118,745      113,063       93,827
  Other expenses                                       61,989       45,580        57,998       61,170       36,390
                                                   -----------------------------------------------------------------
    Total operating expenses                        1,018,186      751,380       752,865      779,897      640,877
                                                   -----------------------------------------------------------------

    Operating income                                 $247,967     $172,839      $153,391     $156,440     $177,104
                                                   =================================================================
Interest and other income                             $39,463      $78,700       $17,021      $22,481      $11,109

Write-down of investment in partnership                            (49,700)

Net income                                           $149,477      $96,852       $89,310      $98,630     $100,014

Basic earnings per common share                         $1.86        $1.17         $1.08        $1.20        $1.22
Diluted earnings per common share                       $1.85        $1.17         $1.08        $1.19        $1.21

Dividends per share                                    $0.685        $0.67       $0.6525        $0.62        $0.60
Book value per common share                            $11.79       $10.99        $10.27        $9.79        $8.97

Total assets                                       $2,472,027   $2,184,734    $2,111,540   $1,874,974   $1,757,116
Net cash provided from operating
activities                                            252,067      207,331       278,005      197,596      177,175
Capital expenditures                                  315,142      261,983       455,477      208,359      289,314

Capitalization

   Long-term debt, less current portion              $714,537     $735,043      $615,770     $541,986     $555,509
   Redeemable cumulative preferred stock                                                                     4,828
   Common stock                                       952,632      894,516       848,752      803,858      736,341
                                                   -----------------------------------------------------------------
     Total capitalization                          $1,667,169   $1,629,559    $1,464,522   $1,345,844   $1,296,678
                                                   =================================================================



                                       2




ITEM 7.  MANAGEMENT'S DISCUSSION AND ANALYSIS OF RESULTS OF OPERATIONS AND
FINANCIAL CONDITION

SUMMARY

On July 1, 2001, Questar Market Resources (QMR) elected to change its
accounting method for gas and oil properties from the full cost method to the
successful efforts method. The change was prompted by an acquisition of a
company that uses successful efforts. A subsidiary, Wexpro, has always
employed the successful efforts method. Management believes that the
successful efforts method is preferable and will more accurately present the
results of operations of the Company's exploration, development and
production activities, minimizes asset write-downs caused by temporary
declines in gas and oil prices and reflects impairment of the carrying value
of the Company's gas and oil properties only when there has been an
other-than-temporary decline in their fair value.

Prior years financial statements have been retroactively restated to reflect
this change in accounting method. As a result of the change in accounting
method, previously reported earnings decreased $7.2 million ($.09 per share)
and $2.0 million ($.03 per share) for the years ended December 31, 2000 and
1999, respectively, and increased $9.4 million ($.15 per share) for the year
ended December 31, 1998.

Questar Corporation earned $149.5 million in 2000, representing a 54%
improvement over net income reported for 1999. Following is a year to year
comparison of net income by line of business.



                                                             2000            1999       Change       Percentage
                                                         -------------------------------------------------------
                                                                   (Dollars in thousands)
                                                                                         
Questar Market Resources (Restated)                       $77,808         $43,888        $33,920             77%
Questar Regulated Services                                 54,332          11,079         43,253            390%
Corporate and other operations                             17,337          41,885        (24,548)            -59%
                                                         ---------------------------------------
                                                         $149,477         $96,852        $52,625             54%
                                                         =======================================

Earnings per diluted common share                           $1.85           $1.17          $0.68             58%


Questar Market Resources' net income rose 77% in 2000 compared with 1999 due
primarily to higher energy prices, a 10% increase in natural gas production
and increased investment by Wexpro in gas-development properties.

Net income of Questar Regulated Services increased 390% in 2000. In 1999,
Questar Pipeline recorded a write-down of its investment in the TransColorado
partnership and ongoing operating losses from the TransColorado partnership.
Questar Gas received a $13.5 million general rate increase effective August
11, 2000, including $7.1 million of interim rate relief beginning January 1,
2000.

Net income of corporate and other operations decreased 59% in 2000 primarily
as the result of reduced sales of securities. Corporate and other operations
recorded after tax gains from selling securities of $13.8 million in 2000
compared with $36.9 million in 1999.

Repurchase of 3.2 million shares of Questar common stock beginning in April
1999 and continuing through August 2000 increased earnings per share by $.04
in 2000.


                                       3



RESULTS OF OPERATIONS

QUESTAR MARKET RESOURCES (Market Resources) conducts Questar's exploration and
production, gas development, gathering, processing and marketing activities.
Following is a restated summary of financial results and operating information.



                                                                     YEAR ENDED DECEMBER 31,
                                                             2000            1999           1998
                                                        -------------------------------------------
                                                                       (IN THOUSANDS)
                                                                                
OPERATING INCOME
Revenues

  Natural gas sales                                      $193,359        $125,245        $98,767
  Oil and natural gas liquids sales                        59,901          41,521         36,722
  Cost-of-service gas operations                           74,492          61,705         61,448
  Energy marketing                                        379,760         243,296        234,565
  Gas gathering and processing                             29,278          22,341         21,954
  Other                                                     5,263           4,203          4,816
                                                        -------------------------------------------
        Total revenues                                    742,053         498,311        458,272

Operating expenses

  Energy purchases                                        369,752         239,201        230,462
  Operating and maintenance                               106,761          79,719         73,460
  Exploration                                               7,917           5,321          6,069
  Depreciation, depletion and amortization                 85,025          73,028         64,965
  Abandonment and impairment of oil
    and gas properties                                      3,418           7,535         15,137
  Other taxes                                              36,262          21,516         24,988
  Wexpro settlement agreement -
    oil income sharing                                      4,758           2,292          1,053
                                                        -------------------------------------------
        Total operating expenses                          613,893         428,612        416,134
                                                        -------------------------------------------
          Operating income                               $128,160         $69,699        $42,138
                                                        ===========================================

OPERATING STATISTICS
Production volumes

    Natural gas (in MMcf)                                  68,963          62,712         51,309
    Oil and natural gas liquids (in Mbbl)
Questar Exploration & Production                            2,225           2,311          2,340
Wexpro                                                        521             555            554
Production revenue
     Natural gas (per Mcf)                                  $2.80           $2.00          $1.92
     Oil and natural gas liquids (per bbl)
 Questar Exploration & Production                          $20.50          $13.92         $12.70
 Wexpro                                                    $27.43          $16.84         $12.64
Wexpro investment base, net
     of deferred income taxes (in millions)                $124.8          $108.9          $97.6
Energy-marketing volumes

    (in thousands of equivalent dth)                      105,632         112,982        113,513
Natural gas-gathering volumes (in Mdth)
    For unaffiliated customers                             92,969          84,961         72,908
    For Questar Gas                                        36,791          32,050         29,893
    For other affiliated customers                         25,068          19,659         17,720
                                                        -------------------------------------------
        Total gathering                                   154,828         136,670        120,521
                                                        ===========================================
    Gathering revenue (per dth)                             $0.13           $0.15          $0.16



                                            4


REVENUES

Revenues were 49% higher in 2000 when compared with 1999 because of higher
prices for natural gas, oil and NGL and increased natural gas production.
Natural gas production rose 10% to 69 Bcf and the average selling price
increased 40%. U. S. gas production increased 3% to 61.7 Bcf, while Canadian
production rose 152% to 7.3 Bcf. Questar acquired Canadian reserves and
producing properties in January 2000. Approximately 53% of gas production in
2000 was hedged at an average price of $2.16 per Mcf, net to the well.
Hedging activities reduced revenues from gas sales by $33.7 million in 2000
but had an insignificant impact in 1999 and 1998.

Selling prices of oil and NGL for nonregulated operations increased 47% to a
combined average of $20.50 per barrel and more than offset a 4% decrease in
production volumes. Approximately 73% of the nonregulated oil production was
hedged at an average price of $17.36 per barrel. Hedging activities reduced
revenues from oil sales by $15.5 million in 2000, but had an insignificant
impact in 1999 and 1998. Production declined in 2000 as a result of selling
nonstrategic properties in the fourth quarter of 1999.

For 2001, Questar has used swaps, costless collars and fixed-price contracts
to hedge approximately 55% of estimated gas production based on December 2000
reserves. The average hedged price is $2.90 per Mcf (net to the well)
assuming floor prices on collars. The average hedged price increases to $3.15
per Mcf (net to the well) if collar ceiling prices are assumed. Approximately
62% of 2001 estimated oil production, based on December 2000 reserves, is
hedged at an average price of $17.20 per barrel, net to the well. Quantities
of hedged production in any given month range between 49% and 66% for gas and
56% and 70% for oil.

Revenues from cost-of-service operations were 21% higher in 2000 compared
with 1999. Wexpro manages and develops oil and natural gas properties on
behalf of Questar Gas and receives a return on its investment in successful
wells. The natural gas production is delivered to Questar Gas at cost of
service. Oil is sold at market prices. Any net income from oil sales
remaining after recovery of expenses and Wexpro's return on investment is
divided between Wexpro and Questar Gas. Questar Gas's portion is reported as
oil-income sharing. Wexpro's investment base, net of deferred income taxes,
grew 15% in 2000 when compared with 1999. The average return on investment
was 19.5% in 2000 and 20% in 1999.

Higher energy prices were responsible for substantial increases in revenues
for energy marketing and improved plant-processing margins. Increased gas
demand led to higher volumes of gas gathering.

Revenues in 1999 improved 9% compared with 1998 as a result of increased
prices for gas, oil and NGL and a 22% rise in gas production. Natural gas
selling prices averaged 4% higher in 1999.

OPERATING EXPENSES (RESTATED)

Operating and maintenance expenses were 34% higher in 2000 primarily due to
an increase in the number of gas and oil properties and increased legal costs
in the settlement of a major case. Exploration expense increased 49% in 2000
compared with 1999 primarily as a result of drilling dry exploratory wells.
Lower dry hole expense caused a 12% decrease in exploration expense in 1999
compared with 1998. Depreciation, depletion and amortization expense (DD&A)
increased 16% in 2000 due largely to a 10% increase in natural gas
production. The average DD&A rate for oil and gas properties was $.78 per
thousand cubic feet equivalent (Mcfe) for 2000, up from $.71 per Mcfe in
1999. Abandonment and impairment of oil and gas properties in 1998 reflects a
write off of assets amounting to $14.7 million as a result of lower energy
prices. Other taxes, primarily production related, rose 69% in 2000 driven by
higher revenues and prices.


                                       5


NONREGULATED GAS AND OIL RESERVES

Market Resources achieved a 261% reserve replacement ratio in 2000 compared
with 131% in 1999. Reserve additions, revisions and purchases, net of sales
in place, amounted to 214.8 Bcfe in 2000, more than double the 100.1 Bcfe
added in 1999. Gains in reserves occurred through drilling results in the
Pinedale Anticline and the acquisition of 61.1 Bcfe of proved reserves in
Canada. In January 2001, Market Resources closed on the sale of 290 producing
properties and a gas gathering system in the Midcontinent for $27 million
with an effective sale date of November 2000. The properties produced
approximately 4.3 MMcf of gas and 180 barrels of oil per day, but were not
compatible with the long-term strategic plans of the Company. In the fourth
quarter of 1999, Market Resources sold producing properties mostly in the
Permian Basin and Kansas with combined daily production of 4.3 MMcf of gas
and 1,100 barrels of oil.

Market Resources achieved a five-year average finding cost of $.82 per Mcfe,
excluding cost-of-service operations, in 2000 compared with $.86 per Mcfe in
1999.

QUESTAR REGULATED SERVICES (Regulated Services) conducts Questar's natural
gas-distribution, transmission, storage and nonregulated retail energy
services.

Natural Gas Distribution - Questar Gas conducts natural gas distribution
operations. Following is a summary of financial results and operating
information:



                                                                     YEAR ENDED DECEMBER 31,
                                                           2000            1999           1998
                                                        ----------------------------------------
                                                                       (IN THOUSANDS)
                                                                               
OPERATING INCOME
Revenues

  Residential and commercial sales                       $467,293        $396,882       $425,452
  Industrial sales                                         38,993          28,938         29,555
  Industrial transportation                                 6,968           6,594          6,480
  Other                                                    23,508          17,523         15,336
                                                        ----------------------------------------
        Total revenues                                    536,762         449,937        476,823
  Natural gas purchases                                   334,193         257,265        281,004
                                                        ----------------------------------------
                                                          202,569         192,672        195,819
Margin

Operating expenses

  Operating and maintenance                               101,486         103,308         96,923
  Depreciation and amortization                            34,450          36,426         33,261
  Other taxes                                              10,213           7,625          8,185
                                                        ----------------------------------------
        Total operating expenses                          146,149         147,359        138,369
                                                        ----------------------------------------
          Operating income                                $56,420         $45,313        $57,450
                                                        ========================================

OPERATING STATISTICS
Natural gas volumes (in Mdth)
  Residential and commercial sales                         83,373          82,201         83,231
  Industrial deliveries
    Sales                                                  10,314           9,823          9,681
    Transportation                                         54,836          51,643         55,461
                                                        ----------------------------------------
      Total industrial                                     65,150          61,466         65,142
                                                        ----------------------------------------
        Total deliveries                                  148,523         143,667        148,373
                                                        ========================================



                                       6




                                                                     YEAR ENDED DECEMBER 31,
                                                            2000            1999           1998
                                                          --------------------------------------
                                                                                
Natural gas revenue (per dth)
  Residential and commercial                                $5.60           $4.83          $5.11
  Industrial sales                                           3.78            2.95           3.05
  Transportation for industrial customers                    0.13            0.13           0.12
System natural gas cost (per dth)                           $3.54           $2.61          $2.57
Heating degree days (normal 5,609)                          5,402           5,317          5,462
  Warmer than normal                                           4%              5%             3%
Number of customers at December 31,
   Residential and commercial                             703,306         684,950        662,084
   Industrial                                               1,323           1,367          1,308
                                                          --------------------------------------
                                                          704,629         686,317        663,392
                                                          ======================================


MARGIN (REVENUES LESS NATURAL GAS PURCHASES)

Questar Gas' margin increased 5% in 2000 when compared with 1999 after
declining by 2% in the prior- year comparison. The improvement was primarily
the result of a $13.5 million annual general rate increase. A $7.1 million
portion of the Utah rate increase went into effect January 1, 2000, with the
remainder reflected in rates beginning August 11, 2000. The rate case
authorized Questar Gas to earn up to an 11% return on equity and included $5
million for annual gas processing costs. The rate case resolved an issue in
which the Public Service Commission of Utah (PSCU) had denied recovery of
$3.6 million of gas processing costs in 1999.

Usage per residential customer, calculated on a temperature adjusted basis,
decreased in 2000 for the third consecutive year. Usage per residential
customer was three decatherms or 3% lower in 2000 when compared with 1999 and
two decatherms or 1% lower in 1999 compared with 1998. Temperatures have been
warmer than normal for the past seven years. However, since 1995, the
financial impact of warmer weather has been minimized because of a
weather-normalization adjustment in rates. Customers served by Questar Gas
grew by 18,312 or 2.7% in 2000, following growth rates of 3.5% in 1999 and
3.4% in 1998.

Industrial deliveries were 6% higher in 2000 due to an increase in natural
gas volumes used to generate electricity. Gas deliveries to industrial
customers decreased by 6% in 1999 because a major steel-producing customer
reduced operations. Margins from gas delivered to industrial customers,
either sold or transported, are substantially lower than from gas delivered
to residential and commercial customers.

Significant gas-cost increases in the second half of 2000 due to rising
demand for natural gas in the western U. S. did not affect the margin. Under
rate regulation in Utah and Wyoming, Questar Gas can request authorization to
recover from customers the cost of its gas supply on a dollar-for-dollar
basis. Gas costs in Utah rates have risen from $1.72 per dth in 1999 to $2.91
in 2000. As of January 1, 2001, gas costs in rates rose to $4.67 per dth.

OPERATING EXPENSES

Operating and maintenance expenses were 2% lower in 2000 due to decreases in
legal, information technology and labor costs. Questar Gas improved a number
of its information technology systems in 1999 as part of its year 2000
system-readiness program. Labor costs were lower as a result of early
retirement programs effective October 31, 2000, and August 31, 1998.
Operating and maintenance expenses were 7% higher in 1999 due to incremental
costs of serving a growing customer base. Depreciation expense was $2.8
million lower in 2000 due to investments in several information systems being
fully depreciated. Depreciation increased 10% in 1999 because of capital
spending. Other taxes


                                       7


increased in 2000 because of a $1.4 million current-year adjustment of
prior-year taxes and from higher property tax rates.

ACQUISITION OF DISTRIBUTION SYSTEMS

Questar Gas has agreed in principle to acquire two gas distribution systems
in exchange for 390,000 shares of Questar Corporation common stock. The
acquisitions, pending approval from the PSCU and Public Service Commission of
Wyoming (PSCW), will add about 10,500 customers in Utah and Wyoming. The
transactions will be accounted for as a purchase.

Natural Gas Transmission - Questar Pipeline conducts natural gas-transmission
and storage operations. Following is a summary of financial results and
operating information:




                                                                     Year Ended December 31,
                                                            2000            1999           1998
                                                         ----------------------------------------
                                                                      (IN THOUSANDS)
                                                                                
OPERATING INCOME
Revenues
  Transportation                                          $72,547         $69,885        $70,824
  Storage                                                  37,711          37,647         36,463
  Processing                                                6,763           3,570
  Other                                                     2,055           1,058          1,270
                                                         ----------------------------------------
        Total revenues                                    119,076         112,160        108,557

Operating expenses

  Operating and maintenance                                43,761          38,534         38,832
  Depreciation and amortization                            15,391          16,743         13,927
  Other taxes                                               3,071           2,488          2,600
                                                         ----------------------------------------
        Total operating expenses                           62,223          57,765         55,359
                                                         ----------------------------------------
          Operating income                                $56,853         $54,395        $53,198
                                                         ========================================

OPERATING STATISTICS
Natural gas transportation volumes (in Mdth)
    For unaffiliated customers                            158,604         135,886        120,747
    For Questar Gas                                       108,183         105,499        107,501
    For other affiliated customers                          8,370          12,153         26,878
                                                         ----------------------------------------
       Total transportation                               275,157         253,538        255,126
                                                         ========================================
   Transportation revenue (per dth)                         $0.26           $0.28          $0.28


REVENUES

Revenues rose 6% in 2000 compared with 1999 due to an increase in the demand
charges resulting from a higher quantity of transportation volumes under firm
contracts and a full year of operation of a plant that removes excess carbon
dioxide from the gas stream. The plant began operation mid-year 1999.

The transportation system experienced an increased demand for gas
transportation resulting from colder fourth-quarter temperatures and expanded
usage for regional power generation. As of December 31, 2000, approximately
77% of Questar Pipeline's transportation system was reserved by
firm-transportation customers under contracts with varying terms and lengths.
Questar Gas has reserved transportation capacity from Questar Pipeline of
approximately 828,000 dth per day, representing 69% of the total reserved
daily-transportation capacity at December 31, 2000. This contract, which
accounts for 78% of the demand charges collected by Questar Pipeline, extends
through June 2002.


                                       8


Revenues from storage operations were unchanged in 2000 when compared with
1999 after increasing 3% in 1999. Questar Pipeline's primary storage facility
at Clay Basin in eastern Utah was enlarged in May 1998. The storage facility
is 100% subscribed under long-term contracts. Most of those contractual
volumes have remaining terms of at least nine years. Questar Gas has
contracted for 26% of firm-storage capacity for at least seven years.

OPERATING EXPENSES

Operating and maintenance expense climbed 14% in 2000 compared with 1999. A
full year of expenses associated with a gas-processing plant added $2 million
of expense and legal costs in a case involving the TransColorado pipeline
added $1.8 million. The estimated useful life of the carbon-dioxide removal
plant was increased from 10 to 20 years resulting in a $1.3 million reduction
of depreciation expense in 2000. Because processing fees are determined on a
cost-of-service basis, the lower depreciation expense resulted in a $1.3
million refund to Questar Gas, the primary customer of processing services.
Depreciation expense increased 20% in 1999 resulting from capital investment
in facilities and information-technology systems.

TRANSCOLORADO CASE

Questar TransColorado Inc. (QTC), a subsidiary of Questar Pipeline, and KN
TransColorado, Inc., (KNTC), a subsidiary of Kinder Morgan, are partners in
the TransColorado Gas Transmission Company (TransColorado). The partners are
involved in a complex lawsuit that is pending in a state district court in
Colorado. At the center of the lawsuit is the validity of a contractual right
claimed by QTC to put its 50% interest in TransColorado to KNTC during the
12-month period beginning March 31, 2001. QTC and KNTC entered a standstill
agreement regarding various issues in the litigation. QTC provided notice to
KNTC that it elected to put its interest in TransColorado as of March 31,
2001, were it not for the provisions of the standstill agreement.

Questar Pipeline recorded a $49.7 million pretax write-down of its investment
in the TransColorado partnership in 1999. QTC share of TransColorado's
operating losses ranged from $.3 million to $1.2 million per month.

CORPORATE AND OTHER OPERATIONS - This business segment is responsible for
information-technology and communications services and corporate
administration.



                                                                     YEAR ENDED DECEMBER 31,
                                                            2000            1999           1998
                                                         ----------------------------------------
                                                                      (IN THOUSANDS)
                                                                                
OPERATING INCOME
Revenues                                                  $73,409         $57,679        $47,907

Operating expenses
  Cost of products sold                                    24,640           9,651          1,515
  Operating and maintenance                                33,506          37,516         37,113
  Depreciation and amortization                             7,590           5,953          6,575
  Other taxes                                               1,073           1,071          1,019
                                                         ----------------------------------------
        Total operating expenses                           66,809          54,191         46,222
                                                         ----------------------------------------
          Operating income                                 $6,600          $3,488         $1,685
                                                         ========================================



REVENUES

Revenues increased 27% because of the acquisitions of Consonus of Oregon at
mid-year 2000 and two computer-networking businesses in the second half of
1999. Questar InfoComm is the majority owner of Consonus. Consonus is an
e-commerce business that combines Internet services and network support in
facilities designed to withstand many of the effects of natural disasters.
The gross


                                       9


margin on products and services sold amounted to $8.3 million, $2.6 million
and $2 million in 2000, 1999 and 1998, respectively.

OPERATING EXPENSES

Operating and maintenance expenses were 11% lower in 2000 when compared with
1999. The impact of adding businesses was partially offset by the effect of
an early retirement program in 1999. A $2.9 million charge associated with an
early retirement program was recorded in 1999 when 50 employees elected to
retire. The workforce reduction resulted in a $2.8 million decrease of
operating expenses in 2000. Amortization of goodwill, incurred because of the
acquisition of Consonus, amounted to $1.7 million in 2000.

CONSOLIDATED OPERATING RESULTS (Restated)

REVENUES

Consolidated revenues rose 37% in 2000 compared with 1999 as a result of
higher energy prices, a 10% increase in gas produced from nonregulated
sources and a boost in revenues from e-commerce business. Higher energy
prices increased revenues from gas and oil production, energy marketing,
natural gas distribution and gas plant processing. Consolidated revenues
increased 2% in 1999 compared with 1998 due primarily to increased gas
production, higher selling prices for energy and the revenues from electronic
commerce services. These increases were largely offset by lower revenues from
gas distribution due to lower gas costs collected in rates.

COST OF NATURAL GAS AND OTHER PRODUCTS SOLD

Higher energy prices were apparent in the cost of natural gas and other
products sold. The dominant areas were natural gas purchased for resale to
distribution customers and energy purchases in marketing transactions. In
addition, the cost of e-commerce services increased in 2000. The cost of
natural gas and other products sold was 4% lower in 1999 due to lower gas
costs allowed in distribution rates.

OPERATING AND MAINTENANCE

Operating and maintenance expenses increased by 14% in 2000 when compared
with 1999. Through an acquisition of Canadian properties and development
drilling, Market Resources increased the number of producing properties.
Legal expenses grew in 2000. A major lawsuit involving affiliates of Market
Resources was settled in 2000, while a lawsuit involving affiliates of
Questar Pipeline began in 2000. Operating and maintenance expenses increased
6% in 1999 compared with 1998 resulting from higher costs of serving a
growing number of gas-distribution customers, adding gas and oil producing
properties, and the cost of an early retirement program for
information-technology employees. Labor costs were about $4.6 million lower
in 1999 compared with 1998 as a result of an early retirement program offered
to employees of Regulated Services in 1998.

Questar Regulated Services initiated an early retirement window program
effective October 31, 2000. A total of 262 employees from Questar Gas,
Questar Pipeline and Questar Regulated Services elected to retire. The window
program is projected to result in pretax labor-cost savings for Regulated
Services of $6-8 million yearly.

DEPRECIATION, DEPLETION AND AMORTIZATION

Depreciation, depletion and amortization (DD&A) increased 8% in 2000 when
compared with 1999 as a result of increased gas production and investment in
depreciable assets. The average DD&A rate for oil and gas wells was $.78 per
thousand cubic feet equivalent (Mcfe) in 2000, up from $.71 per Mcfe in 1999.
Software that reached the end of its depreciable life and an increase of the
estimated useful life of a processing plant resulted in a $4.1 million
reduction of 2000 depreciation expense. DD&A was 11% higher in 1999 as a
result of increased gas production and more investment in exploration and


                                       10



production, distribution and transmission facilities.

EXPLORATION AND ABANDONMENT AND IMPAIRMENT OF OIL AND GAS PROPERTIES

Exploration expense increased 49% in 2000 compared with 1999 primarily as a
result of drilling dry exploratory wells. Lower dry hole expense caused a 12%
decrease in exploration expense in 1999 compared with 1998. Abandonment and
impairment of oil and gas properties in 1998 reflects a write off of assets
amounting to $14.7 million as a result of lower energy prices.

OTHER TAXES

Production and property taxes increased in 2000 because of higher revenues.
Lower revenues in prior years caused a decrease of other taxes in 1999.
Rising property values caused higher property taxes in 2000. A current-year
adjustment of a prior-year tax added $1.4 million to expense in 2000.

INTEREST AND OTHER INCOME

Gain from selling securities of other companies is a significant part of
interest and other income. However, the level of securities sales dropped in
2000 because of the general decline in market value of technology companies.
These sales generated a pretax gain of $26.5 million ($16.3 million after
tax) in 2000 and a pretax gain of $60.7 million ($36.9 million after tax) in
1999.



                                                                   YEAR ENDED DECEMBER 31,
                                                            2000            1999           1998
                                                         ----------------------------------------
                                                                       (IN THOUSANDS)
                                                                                
Gain from sales of securities                             $26,523         $60,720        $10,474
Interest income and other earnings                          8,025           7,523          3,087
Gain (loss) from selling properties                        (1,784)          6,242            142
Allowance for borrowed funds
     used during construction                               4,476           2,017          1,426
Return earned on working-gas inventory                      2,223           2,198          1,892
                                                         ----------------------------------------
     Interest and other income                            $39,463         $78,700        $17,021
                                                         ========================================


OPERATIONS OF UNCONSOLIDATED AFFILIATES

Higher energy prices and not repeating TransColorado's operating losses
resulted in earnings in 2000 as opposed to losses the year before. This
income-statement line item included a $49.7 million write-down of investment
in the TransColorado partnership and $5.9 million of operating loss, net of
AFUDC, from TransColorado in 1999.

DEBT EXPENSE

Interest expense increased due to higher short- and long-term borrowing and
to higher interest rates in 2000.

INCOME TAXES

The effective combined federal, state and foreign income tax rate was 34.4%
in 2000, 32.5% in 1999 and 28.8% in 1998. Income tax rates were below the
combined statutory rate of about 38% primarily due to nonconventional fuel
credits, which amounted to $6.5 million in 2000, $7.2 million in 1999 and $8
million in 1998. In addition, a Colorado state income tax credit derived from
conducting business in a designated enterprise zone reduced state income
taxes by $3.2 million in 2000.


                                       11


LIQUIDITY AND CAPITAL RESOURCES
Operating Activities (Restated)


                                                                  YEAR ENDED DECEMBER 31,
                                                           2000            1999           1998
                                                         ----------------------------------------
                                                                      (IN THOUSANDS)
                                                                               
Net income                                               $149,477         $96,852        $89,310
Adjustments to net income                                 173,428         135,981        118,928
Changes in operating assets and liabilities               (70,838)        (25,502)        69,767
                                                         ----------------------------------------
  Net cash provided from operating activities            $252,067        $207,331       $278,005
                                                         ========================================


Net cash provided from operating activities increased 22% in 2000 when
compared with 1999 due primarily to a 54% increase in net income. Changes in
operating assets and liabilities resulted in a decrease of cash flow due to
the timing differences associated with the effect of higher energy prices on
accounts receivable and the purchased-gas adjustments. This was partially
offset by the change in accounts payable. Interest bearing deposits with
energy brokers, included in accounts receivable, increased significantly in
2000. Net cash provided from operating activities decreased 25% in 1999
compared with 1998 as a result of disbursements on accounts payable. The
balance in payables was higher at the end of 1998 due to construction
projects completed in 1999. The write-downs of investments in partnership and
oil and gas properties were noncash expenses.

Investing Activities (Restated)

Capital expenditures amounted to $315.1 million in 2000 and $262 million in
1999. Capital spending in 2001 is expected to range between $354 million and
$563 million. The upper spending level is contingent upon several key
projects going forward. A 75-mile pipeline planned for central Utah is
awaiting final environmental approval. If approval is received in 2001 and
the pipeline is constructed, Questar Pipeline could spend an additional $74
million. Another major pipeline project, Questar Southern Trails Pipeline
could begin construction in 2001 pending final right of way agreements. This
would further increase capital spending by $45 million. The development of
Questar's e-commerce business is dependent upon the level of outside venture
capital invested.




                                                                  YEAR ENDED DECEMBER 31,
                                                            2001
                                                          Forecast          2000           1999
                                                         ----------------------------------------
                                                                      (IN THOUSANDS)
                                                                                
Questar Market Resources
  Exploratory drilling                                     $2,500            $446         $1,173
  Development drilling                                     76,000          97,361         64,642
  Other exploration                                         2,800             342         13,808
  Reserve acquisitions                                     32,000          65,130          3,704
  Production                                                5,100           8,382          8,746
  Gathering and processing                                 28,000           3,330         12,705
  Electric generation                                      25,000
  Storage                                                   7,100          11,513          4,108
  General                                                   1,500             855         19,362
                                                         ----------------------------------------
                                                          180,000         187,359        128,248



                                       12




                                                                     YEAR ENDED DECEMBER 31,
                                                          2001
                                                         Forecast           2000           1999
                                                         ----------------------------------------
                                                                  (IN THOUSANDS)
                                                                               
Questar Regulated Services
Natural gas distribution
Distribution system and

customer additions                                         49,900          49,454         50,077
General                                                    17,800          16,313         18,370
                                                         ----------------------------------------
                                                           67,700          65,767         68,447
Natural gas transmission

Transmission system                                        20,700          15,312         11,936
Storage                                                    11,900             333          1,571
Partnerships                                                7,900           9,024         14,414
Southern Trails Pipeline                                                   13,975         14,639
Processing plant                                                              250          2,912
General                                                     6,600           4,141          4,952
                                                         ----------------------------------------
                                                           47,100          43,035         50,424
                                                         ----------------------------------------

Other                                                       2,100           1,167          1,385
                                                         ----------------------------------------
Total Questar Regulated Services                          116,900         109,969        120,256

Corporate and other operations
Electronic commerce                                        49,900          12,878          4,296
Communications and technology                               3,100           1,317          3,472
General                                                     3,600           3,619          5,711
                                                         ----------------------------------------
                                                           56,600          17,814         13,479
                                                         ----------------------------------------
                                                         $353,500        $315,142       $261,983
                                                         ========================================


QUESTAR MARKET RESOURCES

Capital expenditures in 2000 primarily reflected exploration for and
development of gas and oil reserves and a purchase of a Canadian company,
which added 61 Bcfe of proved reserves. Market Resources participated in
drilling 316 wells (94 net wells) in 2000 that resulted in 223 gas wells, 18
oil wells, 21 dry holes and 54 wells in progress at year end. The success
rate was 92%.

QUESTAR REGULATED SERVICES - NATURAL GAS DISTRIBUTION

The distribution system was extended by 964 miles of main, feeder and service
lines to accommodate the addition of 18,312 customers.

QUESTAR REGULATED SERVICES - NATURAL GAS TRANSMISSION

Capital spending focused on expansion of the gas transmission network,
conversion of a crude-oil pipeline to transport gas into Southern California
and the acquisition of an additional 18% interest in a pipeline partnership.

CORPORATE AND OTHER OPERATIONS

Capital expenditures included acquiring e-commerce operations and developing
information- technology facilities.


                                       13


Financing Activities

Cash flow generated from operations plus proceeds from the sales of
securities and release of cash previously held in escrow were used to fund
capital expenditures, reduce short- and long-term borrowings, repurchase
shares of Questar common stock and pay dividends to holders of common stock.
Proceeds from a 1999 sale of nonstrategic gas and oil properties were placed
in an escrow account pending possible reinvestment in other producing
properties.

In April 1999, the Company announced plans to repurchase up to $50 million of
its shares over the next two years. From April 1999 through August 2000, the
Company acquired 3.2 million shares for $51.4 million, with about half of
those purchases occurring in 2000. The Company used part of the $121.9
million in proceeds from its 1999 and 2000 sales of Nextel and other
securities to fund those stock repurchases.

Short-term borrowings amounted to $181.1 million of commercial paper and $28
million of bank loans at December 31, 2000. A year earlier, short-term debt
consisted of $128.4 million of commercial paper and $15.7 million of bank
loans. The weighted average interest rate on balances at December 31 was
6.68% in 2000 and 6.14% in 1999. Parent-company commercial-paper borrowings
are backed by short-term line-of-credit arrangements and rated P1 and A1 by
Moody's and Standard and Poor's, respectively. In the third quarter of 2000,
Market Resources initiated an unrated commercial-paper program with a $100
million capacity. Commercial-paper borrowings are limited to and supported by
available capacity on Market Resources' existing revolving credit facility.
Market Resources had a commercial-paper balance of $12.5 million that was
included in the total $181.1 million balance at December 31, 2000.

On March 6, 2001, Market Resources issued in a public offering $150 million
of 7.5% notes due 2011. Market Resources applied the proceeds of the debt
offering to repay a portion of its outstanding floating-rate debt. In 1999,
Market Resources entered into a long-term revolving-credit facility with a
syndication of banks. The credit facility has a $300 million capacity. Market
Resources had borrowed $244.4 million as of December 31, 2000 under this
arrangement.

On February 27, 2001, Questar Pipeline gave notice that it will redeem $30
million of its 9 7/8% debentures on March 30, 2001. The redemption price is
equal to 104.67% of the principal amount plus interest from December 1, 2000.

The Company typically has negative net working capital at December 31 because
of short-term borrowings. These borrowings are seasonal and generally peak at
year end because of cold-weather gas purchases. Negative working capital at
year end was exacerbated by rising energy prices experienced in the second
half of 2000 and extending into the first quarter of 2001.

Questar's consolidated capital structure consisted of 42% long-term debt and
58% common shareholders' equity at December 31, 2000. Moody's and Standard
and Poor's have rated the long-term debt of Questar Gas and Questar Pipeline
A1 and A+, respectively. Questar Market Resources' debt rating is BBB+ by
Standard and Poor's and Baa2 by Moody's.

ITEM 7A. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK.

Questar's primary market-risk exposures arise from commodity-price changes
for natural gas, oil and other hydrocarbons and changes in long-term interest
rates. The Company has an investment in a foreign operation that may subject
it to exchange-rate risk. Market Resources also has reserved


                                       14


pipeline capacity for which it is obligated to pay $3 million annually for
the next six years, regardless of whether it is able to market the capacity
to others.

HEDGING POLICY

The Company has established policies and procedures for managing market risks
through the use of commodity-based derivative arrangements. A primary
objective of these hedging transactions is to protect the Company's commodity
sales from adverse changes in energy prices. The volume of production hedged
and the mix of derivative instruments employed are regularly evaluated and
adjusted by management in response to changing market conditions and reviewed
periodically by the Board of Directors. Additionally, under the terms of the
Market Resources' revolving credit facility, not more than 75% of Market
Resources' production quantities can be committed to hedging arrangements.
The Company does not enter into derivative arrangements for speculative
purposes.

ENERGY-PRICE RISK MANAGEMENT

Energy-price risk is a function of changes in commodity prices as supply and
demand fluctuate. Market Resources bears a majority of the risk associated
with changes in commodity prices. The Company uses hedge arrangements in the
normal course of business to limit the risk of adverse price movements;
however, these same arrangements usually limit future gains from favorable
price movements.

Market Resources held hedge contracts covering the price exposure for about
50.5 million dth of gas and 1 million barrels of oil at December 31, 2000. A
year earlier the contracts covered 72.1 million dth of natural gas and 2.4
million barrels of oil. The hedging contracts exist for a significant share
of Questar-owned gas and oil production and for a portion of gas-marketing
transactions. The contracts at December 31, 2000, had terms extending through
December 2003, with about 91% of those contracts expiring by the end of 2001.

The mark-to-market adjustment of gas and oil price-hedging contracts at
December 31, 2000 was a negative $98 million and represented a liability owed
to counterparties if terminated. A 10% decline in gas and oil prices would
decrease the mark-to-market adjustment by $18.1 million; while a 10% increase
in prices would increase the mark-to-market adjustment by $18.1 million. The
mark-to-market adjustment of gas and oil price-hedging contracts at December
31, 1999 was a negative $6.2 million. A 10% decline in gas and oil prices at
that time would have caused a positive mark-to-market adjustment of $16.7
million. Conversely, a 10% increase in prices would have resulted in a $16.3
million negative mark-to-market adjustment. The calculations used energy
prices posted on the NYMEX, various "into the pipe" postings and fixed prices
for the indicated measurement dates. These sensitivity calculations do not
consider changes in the fair value of the corresponding scheduled physical
transactions (i.e., the correlation between the index price and the price to
be realized for the physical delivery of gas or oil production), which should
largely offset the change in value of the hedge contracts.

INTEREST-RATE RISK MANAGEMENT

The Company owed $714.9 million of long-term debt at December 31, 2000, of
which $470.5 million was fixed-rate debt. The fair value of fixed-rate debt
is subject to change as interest rates fluctuate. The fair value of Questar's
long-term debt amounted to $735.6 million at December 31, 2000. The Company
owed $735.4 million of long-term debt at December 31, 1999, of which $470.1
million was fixed-rate debt. The fair value of Questar's long-term debt
amounted to $728.3 million at December 31, 1999. The fair-value calculation
was based upon quoted market prices and the discounted present value of cash
flows using the Company's current borrowing rates. If interest rates declined
by 10%, fair value would increase to $758.4 million in 2000 and $753.3
million in 1999. Interest costs paid on variable-rate long-term debt would
decrease about $1.7 million. The sensitivity calculations do not represent
the cost to retire the debt securities. The book value of variable-rate debt
approximates fair value.


                                       15


SECURITIES AVAILABLE FOR SALE

Securities available for sale represent equity instruments traded on national
exchanges. The value of these investments is subject to day to day market
volatility. A 10% change in prices would result in a change in value of $3.3
million in 2000 and $9.5 million in 1999.

FOREIGN CURRENCY RISK MANAGEMENT

The Company does not hedge the foreign currency exposure of its foreign
operation's net assets and long-term debt. Long-term debt held by the foreign
operation amounting to $54.4 million (U.S.) is expected to be repaid from
future operations of the foreign company. In January 2000, Market Resources
purchased 100% of the outstanding common stock plus debt of a Canadian
company for $66.4 million (U.S.).

Forward-Looking Statements

This report includes "forward-looking statements" within the meaning of
Section 27(a) of the Securities Act of 1933, as amended, and Section 21(e) of
the Securities Exchange Act of 1934, as amended. All statements other than
statements of historical facts included or incorporated by reference in this
report, including, without limitation, statements regarding the Company's
future financial position, business strategy, budgets, projected costs and
plans and objectives of management for future operations, are forward-looking
statements. In addition, forward-looking statements generally can be
identified by the use of forward-looking terminology such as "may", "will",
"could", "expect", "intend", "project", "estimate", "anticipate", "believe",
"forecast", or " "continue" or the negative thereof or variations thereon or
similar terminology. Although these statements are made in good faith and are
reasonable representations of the Company's expected performance at the time,
actual results may vary from management's stated expectations and projections
due to a variety of factors.

Important assumptions and other significant factors that could cause actual
results to differ materially from those expressed or implied in
forward-looking statements include changes in general economic conditions,
gas and oil prices and supplies, competition, rate-regulatory issues,
regulation of the Wexpro settlement agreement, availability of gas and oil
properties for sale or for exploration and other factors beyond the control
of the Company. These other factors include the rate of inflation, quoted
prices of securities available for sale, the weather and other natural
phenomena, the effect of accounting policies issued periodically by
accounting standard-setting bodies, and adverse changes in the business or
financial condition of the Company.


                                       16



                                     PART IV

ITEM 14.  EXHIBITS, FINANCIAL STATEMENT SCHEDULES, AND REPORTS ON FORM 8-K.

         (a)(1)(2) Financial Statements and Financial Statement Schedules.
The financial statements identified in the List of Financial Statements are
filed as part of this Report.

         (a)(3) Exhibits. The following is a list of exhibits required to be
filed as a part of this Report in Item 14(c).



EXHIBIT NO.       DESCRIPTION
-----------       -----------
               
     2.*          Plan and Agreement of Merger dated as of December 16, 1986, by
                  and among the Company, Questar Systems Corporation, and
                  Universal Resources Corporation. (Exhibit No. (2) to Current
                  Report on Form 8-K dated December 16, 1986.)

     3.1.*        Restated Articles of Incorporation as amended effective May
                  19, 1998. (Exhibit No. 3.1. to Form 10-Q Report for Quarter
                  ended June 30, 1998.)

     3.2.*        Bylaws (as amended effective August 14, 2001). (Exhibit No.
                  3.2. to Form 10-Q Report for Quarter ended September 30,
                  2001.)

     4.1.*(1)     Rights Agreement dated as of February 13, 1996, between the
                  Company and Chemical Mellon Shareholder Services L.L.C.
                  pertaining to the Company's Shareholder Rights Plan. (Exhibit
                  No. 4. to Current Report on Form 8-K dated February 13, 1996.)

     4.2.*        Questar Dividend Reinvestment and Stock Purchase Plan.
                  (Exhibit No. 4. to Current Report on Form 8-K dated February
                  8, 2000.)

     10.1.*       Stipulation and Agreement, dated October 14, 1981, executed by
                  Mountain Fuel; Wexpro; the Utah Department of Business
                  Regulations, Division of Public Utilities; the Utah Committee
                  of Consumer Services; and the staff of the Public Service
                  Commission of Wyoming. (Exhibit No. 10(a) to Mountain Fuel
                  Supply Company's Form 10-K Annual Report for 1981.)

     10.2*.(2)    Questar Corporation Annual Management Incentive Plan, as
                  amended and restated effective February 13, 2001. (Exhibit No.
                  10.2. to Form 10-K Annual Report for 2000.)

     10.3.*(2)    Questar Corporation Executive Incentive Retirement Plan, as
                  amended and restated effective May 19, 1998. (Exhibit No.
                  10.2. to Form 10-Q Report for Quarter Ended June 30, 1998.)


                                       17


     10.4.*(2)    Questar Corporation Long-Term Stock Incentive Plan, as amended
                  and restated effective March 1, 2001. (Exhibit No. 10.4. to
                  Form 10-K Annual Report for 2000.)

     10.5.*(2)    Questar Corporation Executive Severance Compensation Plan, as
                  amended and restated effective May 19, 1998. (Exhibit No.
                  10.3. to Form 10-Q Report for Quarter Ended June 30, 1998.)

     10.6.*(2)    Questar Corporation Deferred Compensation Plan for Directors,
                  as amended and restated effective October 26, 2000. (Exhibit
                  No. 10.6. to Form 10-K Annual Report for 2000.)

     10.7.*(2)    Questar Corporation Supplemental Executive Retirement Plan, as
                  amended and restated effective June 1, 1998. (Exhibit No.
                  10.6. to Form 10-Q Report for Quarter Ended June 30, 1998.)

     10.8.*(2)    Questar Corporation Stock Option Plan for Directors, as
                  amended and restated effective October 29, 1998. (Exhibit No.
                  10.10. to Form 10-Q Report for Quarter Ended September 30,
                  1998.)

     10.9.*(2)    Form of Individual Indemnification Agreement dated February 9,
                  1993 between Questar Corporation and Directors. (Exhibit No.
                  10.11. to Form 10-K Annual Report for 1992.)

     10.10.*(2)   Questar Corporation Deferred Share Plan, as amended and
                  restated effective May 19, 1998. (Exhibit No. 10.7. to Form
                  10-Q Report for Quarter Ended June 30, 1998.)

     10.11.*(2)   Questar Corporation Deferred Compensation Plan, as amended and
                  restated effective October 26, 2000. (Exhibit No. 10.11. to
                  Form 10-K Annual Report for 2000.)

     10.12.*(2)   Questar Corporation Directors' Stock Plan as approved May 21,
                  1996. (Exhibit No. 10.15. to Form 10-Q Report for Quarter
                  ended June 30, 1996.)

     10.13.*(2)   Questar Corporation Deferred Share Make-Up Plan. (Exhibit No.
                  10.8. to Form 10-Q Report for Quarter Ended June 30, 1998.)

     10.14.*(2)   Questar Corporation Special Situation Retirement Plan.
                  (Exhibit No. 10.10. to Form 10-Q Report for Quarter Ended June
                  30, 1998.)

     10.15.*      Employment Agreement between Questar Corporation and Keith O.
                  Rattie effective February 1, 2001. (Filed as Exhibit No.
                  10.15. to Form 10-K Annual


                                       18


                  Report for 2000.)

     21.          Subsidiary Information. (Filed as Exhibit No. 21. to Form 10-K
                  Report for 2000.)

     23.01        Consent of Independent Auditors.

     24.          Power of Attorney. (Filed as Exhibit No. 24. to Form 10-K
                  Report for 2000.)

     99.1.        Undertakings for Registration Statements on Form S-3 (No.
                  33-48168) and on Form S-8 (Nos. 33-4436, 33-15149, 33-40800,
                  33-40801, 33-48169, 333-04913, and 333-04951). (Filed as
                  Exhibit No. 99.1. to Form 10-K Report for 2000.)


-----------------------
         *Exhibits so marked have been filed with the Securities and Exchange
Commission as part of the indicated filing and are incorporated herein by
reference.

         (1)The name of the Rights Agent has been changed to USBank National
Association.

         (2)Exhibit so marked is management contract or compensation plan or
arrangement.

         (b) The Company did not file any Current Reports on Form 8-K during the
last quarter of 2000.



                                       19



                          ANNUAL REPORT ON FORM 10-K/A

                     ITEM 8, ITEM 14(a) (1) and (2), and (d)

                          LIST OF FINANCIAL STATEMENTS

                   FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA

                          YEAR ENDED DECEMBER 31, 2000

                               QUESTAR CORPORATION

                              SALT LAKE CITY, UTAH


FORM 10-K/A -- ITEM 14 (a) (1) AND (2)

QUESTAR CORPORATION AND SUBSIDIARIES

LIST OF FINANCIAL STATEMENTS AND
FINANCIAL STATEMENT SCHEDULES


The following financial statements of Questar Corporation and subsidiaries are
included in Item 8:

         Consolidated statements of income--Years ended December 31, 2000, 1999
         and 1998

         Consolidated balance sheets--December 31, 2000 and 1999

         Consolidated statements of common shareholder's equity--Years ended
         December 31, 2000, 1999 and 1998

         Consolidated statements of cash flows--Years ended December 31, 2000,
         1999 and 1998

         Notes to consolidated financial statements

Financial statement schedules, for which provision is made in the applicable
accounting regulations of the Securities and Exchange Commission, are not
required under the related instructions or are inapplicable, and therefore
have been omitted.


                                       20



                         Report of Independent Auditors

Board of Directors
Questar Corporation


We have audited the accompanying consolidated balance sheets of Questar
Corporation as of December 31, 2000 and 1999, and the related consolidated
statements of income, common shareholders' equity, and cash flows for each of
the three years then ended. These financial statements are the responsibility
of the Company's management. Our responsibility is to express an opinion on
these financial statements based on our audits.

We conducted our audits in accordance with auditing standards generally
accepted in the United States. Those standards require that we plan and
perform the audit to obtain reasonable assurance about whether the financial
statements are free of material misstatement. An audit includes examining, on
a test basis, evidence supporting the amounts and disclosures in the
financial statements. An audit also includes assessing the accounting
principles used and significant estimates made by management, as well as
evaluating the overall financial statement presentation. We believe that our
audits provide a reasonable basis for our opinion.

In our opinion, the financial statements referred to above present fairly, in
all material respects, the consolidated financial position of Questar
Corporation at December 31, 2000 and 1999, and the consolidated results of its
operations and its cash flows for the three years then ended in conformity with
accounting principles generally accepted in the United States.

As discussed in Note 1 to the consolidated financial statements, in 2000 the
Company changed its method of accounting for oil and gas operations.


/s/ Ernst & Young, LLP


Salt Lake City, Utah
March 6, 2001 except for
Note 1, as to which the
date is November 30, 2001 and
Note 2, as to which the date is July 31, 2001






QUESTAR CORPORATION AND SUBSIDIARIES
CONSOLIDATED STATEMENTS OF INCOME
(Restated)



                                                                                    YEAR ENDED DECEMBER 31,
                                                                          2000           1999          1998
                                                                      ------------------------------------------
                                                                      (IN THOUSANDS, EXCEPT PER SHARE AMOUNTS)
                                                                                            
REVENUES                                                               $1,266,153      $ 924,219     $ 906,256

OPERATING EXPENSES
  Cost of natural gas and other products sold                             562,229        352,554       367,932
  Operating and maintenance                                               251,477        221,082       208,191
  Depreciation, depletion and amortization                                142,491        132,164       118,745
  Exploration                                                               7,917          5,321         6,069
  Abandonment and impairment of oil
     and gas properties                                                     3,418          7,535        15,137
  Other taxes                                                              50,654         32,724        36,792
                                                                      ------------------------------------------

    TOTAL OPERATING EXPENSES                                            1,018,186        751,380       752,866
                                                                      ------------------------------------------

    OPERATING INCOME                                                      247,967        172,839       153,390

INTEREST AND OTHER INCOME                                                  39,463         78,700        17,021

OPERATIONS OF UNCONSOLIDATED
   AFFILIATES
     Income (loss)                                                          3,996         (4,356)        2,917
     Write-down of investment in partnership                                             (49,700)
                                                                      ------------------------------------------
                                                                            3,996        (54,056)        2,917

DEBT EXPENSE                                                              (63,510)       (53,944)      (47,971)
                                                                      ------------------------------------------

     INCOME BEFORE INCOME TAXES                                           227,916        143,539       125,357

INCOME TAXES                                                               78,439         46,687        36,047
                                                                      ------------------------------------------

     NET INCOME                                                         $ 149,477       $ 96,852      $ 89,310
                                                                      ==========================================

EARNINGS PER COMMON SHARE
   Basic                                                                   $ 1.86         $ 1.17        $ 1.08
   Diluted                                                                 $ 1.85         $ 1.17        $ 1.08

Average common shares outstanding
   Basic                                                                   80,412         82,547        82,365
   Diluted                                                                 80,915         82,676        82,817


See notes to consolidated financial statements


                                       21


QUESTAR CORPORATION AND SUBSIDIARIES
CONSOLIDATED BALANCE SHEETS
(Restated)



ASSETS                                                                        DECEMBER 31,
                                                                          2000           1999
                                                                       ----------------------------
                                                                              (IN THOUSANDS)
                                                                                
CURRENT ASSETS
  Cash and cash equivalents                                               $ 9,416        $ 8,291
  Accounts receivable                                                     277,331        143,987
  Unbilled gas accounts receivable                                         45,293         37,287
  Federal income taxes recoverable                                          9,694
  Inventories, at lower of average cost or market
    Gas and oil storage                                                    30,062         27,360
    Materials and supplies                                                 10,472         10,254
  Purchased-gas adjustments                                                35,565            432
  Prepaid expenses and other                                                9,189         11,249
                                                                       ----------------------------
     TOTAL CURRENT ASSETS                                                 427,022        238,860

PROPERTY, PLANT AND EQUIPMENT
  Questar Market Resources                                              1,400,159      1,225,321
  Questar Regulated Services - gas distribution                         1,067,362      1,013,599
  Questar Regulated Services - gas transmission                           731,246        698,236
  Questar Regulated Services - other                                        5,764          4,493
  Corporate and other operations                                           82,603         72,769
                                                                       ----------------------------
                                                                        3,287,134      3,014,418
LESS ALLOWANCES FOR DEPRECIATION
     AND AMORTIZATION
  Questar Market Resources                                                662,923        587,603
  Questar Regulated Services - gas distribution                           447,496        421,111
  Questar Regulated Services - gas transmission                           243,006        228,784
  Questar Regulated Services - other                                        3,073          2,542
  Corporate and other operations                                           43,661         40,727
                                                                       ----------------------------
                                                                        1,400,159      1,280,767
                                                                       ----------------------------
     NET PROPERTY, PLANT AND EQUIPMENT                                  1,886,975      1,733,651

SECURITIES AVAILABLE FOR SALE                                              33,019         94,945

INVESTMENT IN UNCONSOLIDATED
     AFFILIATES                                                            34,505         25,269

OTHER ASSETS
  Regulatory assets                                                        37,646         26,025
  Goodwill, net                                                            20,514          7,750
  Cash held in escrow                                                       5,387         36,727
  Other noncurrent assets                                                  26,959         21,507
                                                                       ----------------------------
      TOTAL OTHER ASSETS                                                   90,506         92,009
                                                                       ----------------------------

                                                                       $2,472,027     $2,184,734
                                                                       ============================



                                       22


LIABILITIES AND SHAREHOLDERS' EQUITY



                                                                              DECEMBER 31,
                                                                          2000           1999
                                                                       ----------------------------
                                                                             (IN THOUSANDS)
                                                                                
CURRENT LIABILITIES
  Short-term debt                                                       $ 209,139      $ 144,115
  Accounts payable and accrued expenses
    Accounts and other payables                                           273,892        132,473
    Federal income taxes                                                                  17,374
    Other taxes                                                            30,718         22,315
    Deferred income taxes                                                  13,515            164
    Interest                                                                7,300          7,518
                                                                       ----------------------------
      Total accounts payable and accrued expenses                         325,425        179,844
                                                                       ----------------------------
     TOTAL CURRENT LIABILITIES                                            534,564        323,959


LONG-TERM DEBT                                                            714,537        735,043


DEFERRED INCOME TAXES                                                     213,136        189,014


DEFERRED INVESTMENT TAX CREDITS                                             5,262          5,648


OTHER LONG-TERM LIABILITIES                                                33,680         29,944


MINORITY INTEREST                                                          18,216          6,610


COMMITMENTS AND CONTINGENCIES - Note 7


COMMON SHAREHOLDERS' EQUITY
  Common stock - without par value; 350,000,000
     shares authorized;  80,818,274 outstanding at
     December 31, 2000 and 81,418,853 outstanding
     at December 31, 1999                                                 268,630        278,437
  Retained earnings                                                       671,415        577,022
  Cumulative other comprehensive income                                    12,587         39,057
                                                                       ----------------------------
     TOTAL COMMON SHAREHOLDERS' EQUITY                                    952,632        894,516


                                                                       ----------------------------
                                                                       $2,472,027     $2,184,734
                                                                       ============================



See notes to consolidated financial statements


                                       23


QUESTAR CORPORATION AND SUBSIDIARIES
CONSOLIDATED STATEMENTS OF COMMON SHAREHOLDERS' EQUITY
(Restated)



                                                                                                           CUMULATIVE
                                                       COMMON STOCK                            NOTE          OTHER         COMPRE-
                                                --------------------------     RETAINED     RECEIVABLE   COMPREHENSIVE     HENSIVE
                                                  SHARES         AMOUNT        EARNINGS      FROM ESOP       INCOME        INCOME
                                                ----------------------------------------------------------------------------------
                                                                               (DOLLARS IN THOUSANDS)
                                                                                                      
BALANCES AT JANUARY 1, 1998                       82,142,084   $ 291,322      $ 499,754     $ (10,173)      $ 22,955
Issuance of common stock                             521,879       8,243
Purchase of common stock                             (31,885)       (677)
1998 net income                                                                  89,310                                 $ 89,310
Payment of common stock dividends
    of $.6525 per share                                                         (53,747)
Income tax benefit of dividends paid to ESOP                                        143
Collection of note receivable from ESOP                                                         6,218
Other comprehensive income

  Unrealized loss on securities available for
      sale, net of income taxes of $3,086                                                                    (4,992)     (4,992)
  Foreign currency translation adjustment,
      net of income taxes of $214                                                                               396         396
                                               -----------------------------------------------------------------------------------
BALANCES AT DECEMBER 31, 1998                    82,632,078     298,888        535,460        (3,955)        18,359     $ 84,714
                                                                                                                    ============
Issuance of common stock                            488,302       8,124
Purchase of common stock                         (1,701,527)    (28,575)
1999 net income                                                                 96,852                                  $ 96,852
Payment of common stock dividends
    of $.67 per share                                                          (55,328)
Income tax benefit of dividends paid to ESOP                                        38
Collection of note receivable from ESOP                                                        3,955
 Other comprehensive income

  Unrealized gain on securities available for sale,
      net of income taxes of $13,193                                                                         21,303      21,303
  Foreign currency translation adjustment,
      net of income taxes of $327                                                                              (605)       (605)
                                                  ---------------------------------------------------------------------------------
BALANCES AT DECEMBER 31, 1999                       81,418,853     278,437        577,022       -               39,057    $117,550
                                                                                                                       ============
Issuance of common stock                               958,232      11,764
Purchase of common stock                            (1,558,811)    (25,543)
2000 net income                                                                   149,477                                 $149,477
Payment of common stock dividends
    of $.685 per share                                                            (55,084)
Income tax benefit associated with exercise of
nonqualified options and premature dispositions                      3,972
Other comprehensive income

  Unrealized loss on securities available for sale,
      net of income taxes of $16,767                                                                           (25,453)    (25,453)
  Foreign currency translation adjustment,
      net of income taxes of $949                                                                               (1,017)     (1,017)
                                                  ---------------------------------------------------------------------------------

BALANCES AT DECEMBER 31, 2000                       80,818,274   $ 268,630      $ 671,415      $ -          $ 12,587 -    $123,007
                                                  =================================================================================


See notes to consolidated financial statements


                                       24


QUESTAR CORPORATION AND SUBSIDIARIES
CONSOLIDATED STATEMENTS OF CASH FLOWS
(Restated)



                                                                                YEAR ENDED DECEMBER 31,
                                                                           2000           1999          1998
                                                                       ----------------------------------------
OPERATING ACTIVITIES                                                                (IN THOUSANDS)
                                                                                             
  Net income                                                            $ 149,477       $ 96,852      $ 89,310
  Adjustments to reconcile net income to net cash
   provided from operating activities
  Depreciation, depletion and amortization                                148,293        139,124       122,254
  Deferred income taxes and investment tax credits                         47,355         (1,087)       (7,487)
  Write-down of investment in partnership                                                 49,700
  Abandonment and impairment of oil and gas properties                      3,418          7,535        15,137
  (Income) loss from unconsolidated affiliates,
     net of cash distributions                                               (899)         7,671          (360)
  Gain from sales of properties and securities                            (24,739)       (66,962)      (10,616)
                                                                       ----------------------------------------
                                                                          322,905        232,833       208,238
  Changes in operating assets and liabilities
    Accounts receivable                                                  (136,700)        (1,004)        8,822
    Inventories                                                            (2,892)           252        (7,238)
    Prepaid expenses and other                                              2,077            615         2,556
    Accounts payable and accrued expenses                                 144,190        (41,549)       38,207
    Federal income taxes                                                  (27,068)         8,684         2,251
    Purchased-gas adjustments                                             (35,133)         1,635        35,184
    Other assets                                                          (17,144)         3,446        (7,664)
    Other liabilities                                                       1,832          2,419        (2,351)
                                                                       ----------------------------------------
    NET CASH PROVIDED FROM OPERATING ACTIVITIES                           252,067        207,331       278,005

INVESTING ACTIVITIES
  Capital expenditures

     Purchase of property, plant and equipment                           (305,818)      (215,814)     (421,810)
     Other investments                                                     (9,324)       (46,169)      (33,667)
                                                                       ----------------------------------------
         Total capital expenditures                                      (315,142)      (261,983)     (455,477)
  Proceeds from disposition of property, plant
    and equipment                                                           2,726         45,721        45,613
  Proceeds from sales of securities                                        46,814         75,126         6,759
                                                                       ----------------------------------------
   NET CASH USED IN INVESTING ACTIVITIES                                 (265,602)      (141,136)     (403,105)

FINANCING ACTIVITIES
  Issuance of common stock                                                 15,736          8,124         8,243
  Purchase of Questar common stock                                        (25,543)       (28,575)         (677)
  Issuance of long-term debt                                               61,725        317,000       152,743
  Repayment of long-term debt                                             (80,075)      (206,996)      (77,198)
  Increase (decrease) in short-term loans                                  64,581        (76,985)       89,900
  Cash held in escrow                                                      31,340        (36,727)
  Other financing                                                           2,955          3,993         6,361
  Payment of dividends                                                    (55,084)       (55,328)      (53,747)
                                                                       ----------------------------------------
    NET CASH PROVIDED FROM (USED IN)
      FINANCING ACTIVITIES                                                 15,635        (75,494)      125,625
  Foreign currency translation adjustment                                    (975)           101          (307)
                                                                       ----------------------------------------
CHANGE IN CASH AND CASH EQUIVALENTS                                         1,125         (9,198)          218
BEGINNING CASH AND CASH EQUIVALENTS                                         8,291         17,489        17,271
                                                                       ----------------------------------------
ENDING CASH AND CASH EQUIVALENTS                                          $ 9,416        $ 8,291      $ 17,489
                                                                       ========================================



See notes to consolidated financial statements


                                       25


QUESTAR CORPORATION AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

Note 1 - Summary of Accounting Policies

PRINCIPLES OF CONSOLIDATION: The consolidated financial statements contain
the accounts of Questar Corporation and subsidiaries (Questar or the
Company). Questar is a diversified natural gas company with two principal
lines of business: nonregulated and regulated. The Company's nonregulated
activities of gas and oil exploration and production, gas gathering and
processing, and energy marketing are conducted by Questar Market Resources,
Inc. and subsidiaries (Market Resources). The Company's regulated activities
of natural gas distribution, transmission and storage operations are
conducted by Questar Regulated Services Co. and subsidiaries (Regulated
Services). Natural gas-distribution activities are conducted by Questar Gas.
Questar Pipeline provides natural gas transmission and storage services.
Regulated Services also includes Questar Energy Services which conducts
retail-energy services. Corporate and other operations include
information-technology and telecommunication services and corporate
activities. All significant intercompany accounts and transactions have been
eliminated in consolidation.

INVESTMENTS IN UNCONSOLIDATED AFFILIATES: Questar uses the equity method to
account for investments in affiliates in which it does not have control.
Principal affiliates and percentage ownership include: Overthrust Pipeline
Company (72%), TransColorado Gas Transmission Company (50%), Canyon Creek
Compression Company (15%) and Blacks Fork Gas Processing Company (50%).
Generally, the Company's investment in these affiliates equals the underlying
equity in net assets, except for TransColorado where the investment was
written down. The Company experienced an other-than-temporary decline in its
partnership investment in TransColorado caused by low volumes resulting from
unfavorable regional transportation economics.

REGULATION: Questar Gas is regulated by the Public Service Commission of Utah
(PSCU) and the Public Service Commission of Wyoming (PSCW). While Questar Gas
also serves a small area of southeastern Idaho, the Public Utilities
Commission of Idaho has deferred to the PSCU for rate oversight of this area.
Questar Pipeline is regulated by the Federal Energy Regulatory Commission
(FERC). These regulatory agencies establish rates for the storage,
transportation and sale of natural gas. The regulatory agencies also
regulate, among other things, the extension and enlargement or abandonment of
jurisdictional natural gas facilities. Regulation is intended to permit the
recovery, through rates, of the cost of service, including a return on
investment.

The financial statements of rate-regulated businesses are presented in
accordance with regulatory requirements. Methods of allocating costs to time
periods, in order to match revenues and expenses, may differ from those of
other businesses because of cost-allocation methods used in establishing
rates.

USE OF ESTIMATES: The preparation of financial statements in conformity with
accounting principles generally accepted in the United States requires
management to make estimates and assumptions that affect the amounts of
assets and liabilities and disclosure of contingent liabilities reported in
the financial statements and accompanying notes. Actual results could differ
from those estimates.

REVENUE RECOGNITION: Revenues are recognized in the period that services are
provided or products are delivered. Questar Gas records gas-distribution
revenues for gas delivered to residential and commercial customers but not
billed at the end of the accounting period. Rate-regulated companies
periodically collect revenues subject to possible refunds pending final
orders from regulatory agencies. These companies establish appropriate
reserves for revenues collected subject to refund. The Company's exploration
and production operations use the sales method of accounting for gas
revenues, whereby revenue is recognized on all gas sold to purchasers. A
liability is recorded to the extent that the Company has an imbalance in
excess of its share of remaining reserves in an underlying property. The
Company's net gas imbalances at December 31, 2000 and 1999 were not
significant.

PURCHASED-GAS ADJUSTMENTS: Questar Gas accounts for purchased-gas costs in
accordance with


                                       26


procedures authorized by the PSCU and PSCW under which purchased-gas costs
that are different from those provided for in present rates are accumulated
and recovered or credited through future rate changes.

CASH AND CASH EQUIVALENTS: Cash equivalents consist principally of repurchase
agreements with maturities of three months or less. In almost all cases, the
repurchase agreements are highly liquid investments in overnight securities
made through commercial bank accounts that result in available funds the next
business day.

SECURITIES AVAILABLE FOR SALE: The value of securities available for sale
approximates fair value at the balance sheet date based on published share
prices. Based on market value at the balance sheet date, the Company records
unrealized gains or losses, net of income taxes, as a separate component of
other comprehensive income in shareholders' equity. Gains or losses resulting
from the sale of securities are included in the determination of income as
incurred.

CHANGE IN METHOD OF ACCOUNTING FOR GAS AND OIL PROPERTIES: On July 1, 2001,
Questar elected to change its accounting method for gas and oil properties
from the full cost method to the successful efforts method. The change was
prompted by an acquisition of a company that uses successful efforts. A
subsidiary, Wexpro, has always employed the successful efforts method.
Management believes that the successful efforts method is preferable and will
more accurately present the results of operations of the Company's
exploration, development and production activities, minimizes asset
write-downs caused by temporary declines in gas and oil prices and reflects
impairment of the carrying value of the Company's gas and oil properties only
when there has been an other-than-temporary decline in their fair value.

As a result, prior years and interim financial statements have been
retroactively restated to reflect this change in accounting method. The
effect, net of income taxes, was a reduction of retained earnings recorded
retroactively as of December 31, 1995, of $37.6 million. This resulted from a
reduction of net property, plant and equipment in the amount of $61.9 million
and a reduction of deferred income taxes of $24.3 million. As a result of the
change in accounting method, previously reported earnings decreased $7.2
million ($.09 per share) and $2.0 million ($.03 per share) for the years
ended December 31, 2000 and 1999, respectively, and increased $9.4 million
($.15 per share) for the year ended December 31, 1998.

PROPERTY, PLANT AND EQUIPMENT: Property, plant and equipment is stated at
cost. The Company uses the successful efforts accounting method for its gas
and oil exploration and development activities.

OIL AND GAS PROPERTIES

Under the successful efforts method of accounting, the Company capitalizes
all costs related to property acquisitions, successful exploratory wells, and
successful and unsuccessful development wells. Also, the costs of related
support equipment and facilities are capitalized. The costs of unsuccessful
exploratory wells are expensed when such wells are determined to be
nonproductive. Unproved leaseholds costs are capitalized and reviewed
periodically for impairment. Costs related to impaired prospects are charged
to expense. Costs of geological and geophysical studies and other exploratory
activities are expensed as incurred. Costs associated with production and
general corporate activities are expensed in the period incurred. The Company
recognizes gain or loss on the sale of properties on a field basis.

Leasehold costs are amortized on the unit-of-production method based on
proved reserves on a field basis. All other capitalized costs associated with
oil and gas properties are depreciated on the unit-of-production method based
on proved developed reserves on a field basis. Costs of future site
restoration, dismantlement, and abandonment for producing properties are
accrued as part of depreciation, depletion and amortization expense for
tangible equipment by assuming no salvage value in the calculation of the
unit of production rate.

COST-OF-SERVICE OIL AND GAS OPERATIONS

As ordered by the Public Service Commission of Utah, the successful efforts
method of accounting is utilized with respect to costs associated with
certain "cost of service" oil and gas properties managed and developed by
Wexpro and regulated for ratemaking purposes. Cost of service oil and gas
properties are those properties for which the


                                      27


operations and return on investment are regulated by the Wexpro settlement
agreement (see Note 10). In accordance with the settlement agreement,
production from the gas properties operated by Wexpro is delivered to Questar
Gas at Wexpro's cost of providing this service. That cost includes a return
on Wexpro's investment. Oil produced from the cost of service properties is
sold at market prices. Proceeds are credited, pursuant to the terms of the
settlement agreement, allowing Questar Gas to share in the proceeds for the
purpose of reducing natural gas rates.

Capitalized costs are amortized on an individual field basis using the
unit-of-production method based upon proved developed oil and gas reserves
attributable to the field. Costs of future site restoration, dismantlement,
and abandonment for producing properties are accrued as part of depreciation
and amortization expense for tangible equipment by assuming no salvage value
in the calculation of the unit of production rate.




                                                                           2000            1999
                                                                       ---------------------------
                                                                             (IN THOUSANDS)
                                                                                 
PROPERTY, PLANT AND EQUIPMENT

Oil and gas properties - successful efforts accounting
Proved properties (Restated)                                             $ 845,485       $ 717,147
Unproved properties, not being amortized (Restated)                         55,608          51,624
Support equipment and facilities                                            13,179          13,408
                                                                       ---------------------------
                                                                           914,272         782,179
Cost-of-service oil and gas properties -
successful efforts accounting                                              348,403         318,451
Gathering, processing and marketing                                        137,484         124,691
                                                                       ---------------------------
                                                                       $ 1,400,159     $ 1,225,321
                                                                       ===========================

ACCUMULATED DEPRECIATION, DEPLETION AND AMORTIZATION

Oil and gas properties - successful efforts
    accounting  (Restated)                                               $ 411,506       $ 353,399
Cost-of-service oil and gas properties -
successful efforts accounting                                              193,029         180,867
Gathering, processing and marketing                                         58,388          53,337
                                                                       ---------------------------
                                                                         $ 662,923       $ 587,603
                                                                       ===========================


For the remaining Company properties, the provision for depreciation, depletion
and amortization is based upon rates that will systematically charge the costs
of assets against income over the estimated useful lives of those assets. The
investment in natural gas distribution, transmission, storage, gathering and
processing property, plant and equipment, and is charged to expense using the
straight-line method. The costs of gas wells and related production facilities
are charged to expense using the unit-of-production method.

Average depreciation, depletion and amortization rates used in the 12 months
ended December 31 were as follows:



                                                                             2000            1999           1998
                                                                           ---------------------------------------
                                                                                                  
Questar Market Resources

  Oil and gas properties, per Mcf equivalent (Restated)
    U.S.                                                                    $ 0.73          $ 0.72         $ 0.74
    Canada (in U.S. dollars)                                                  1.12            0.63           0.71
      Combined U.S. and Canada                                                0.78            0.71           0.74
  Cost of service oil and gas properties, per Mcfe                            0.44            0.42           0.39



                                       28


Average depreciation and amortization rates used were as follows:



                                                                              2000            1999           1998
                                                                           ---------------------------------------
                                                                                                  
Questar Regulated Services
  Natural gas distribution
     Distribution plant                                                        4.0%            4.2%           4.3%
     Gas wells, per Mcf                                                     $ 0.15          $ 0.15         $ 0.17
Natural gas transmission, processing and storage                               3.2%            3.4%           3.2%


SFAS 121

The Company follows the provisions of Statement of Financial Accounting
Standards (SFAS) 121, "Accounting for the Impairment of Long-Lived Assets and
for Long-Lived Assets to be Disposed Of" in evaluating impairment of
properties.

GOODWILL: Goodwill is amortized on the straight-line method principally over
10 years. Goodwill amortization expense was $1.7 million in 2000 and the
accumulated amortization balance was $1.8 million at December 31, 2000.

CAPITALIZED INTEREST AND ALLOWANCE FOR FUNDS USED DURING CONSTRUCTION:
Questar's regulated subsidiaries capitalize the cost of capital employed
during the construction period of plant and equipment in accordance with FERC
guidelines. Capitalized financing costs, called allowance for funds used
during construction (AFUDC), consist of debt and equity portions. The debt
portion of AFUDC is recorded as a reduction of interest expense and the
equity portion is recorded in other income. The Company's nonregulated
subsidiaries capitalize interest costs during construction of assets when it
is applicable. Under provisions of the Wexpro settlement agreement, the
Company capitalizes AFUDC on cost-of-service construction projects and
records the amount in other income. Debt expense was reduced by $4,224,000 in
2000, $3,035,000 in 1999 and $1,421,000 in 1998. AFUDC included in interest
and other income amounted to $4,476,000 in 2000, $2,017,000 in 1999 and
$1,426,000 in 1998.

REACQUISITION OF DEBT: Gains and losses on the reacquisition of debt by
rate-regulated affiliates are deferred and amortized as debt expense over the
would-be remaining life of the retired debt or the life of the replacement
debt in order to match regulatory treatment.

FOREIGN CURRENCY TRANSLATION: The Company conducts gas and oil exploration
and production activities in western Canada. The local currency is the
functional currency of the Company's foreign operations. Translation from the
functional currency to U. S. dollars is performed for balance-sheet accounts
using the exchange rate in effect at the balance-sheet date. Revenue and
expense accounts are translated using an average exchange rate. Adjustments
resulting from such translations are reported as a separate component of
other comprehensive income in shareholders' equity. Deferred income taxes
have been provided on translation adjustments because the earnings are not
considered to be permanently invested.

HEDGING POLICY: The Company has established policies and procedures for
managing market risks through the use of commodity-based derivative
arrangements. A primary objective of these hedging transactions is to protect
the Company's commodity sales from adverse changes in energy prices. The
volume of production hedged and the mix of derivative instruments employed
are regularly evaluated and adjusted by management in response to changing
market conditions and reviewed periodically by the Board of Directors.
Additionally, under the terms of Market Resources' revolving credit facility,
not more than 75% of Market Resources' production quantities can be committed
to hedging arrangements. The Company does not enter into derivative
arrangements for speculative purposes.

ENERGY-PRICE RISK MANAGEMENT: Market Resources enters into swaps, futures
contracts or options agreements to hedge exposure to price fluctuations in
connection with marketing of the Company's natural gas and oil production,
and to secure a known margin for the purchase and resale of gas, oil and
electricity in marketing activities. It is expected that there is a high
degree of correlation between the changes in market value of such contracts
and the market price ultimately received on the hedged physical transactions.
The timing of production and of the hedge contracts is closely matched. Hedge
prices are established in the areas of Market Resources' production
operations.


                                       29


The Company settles most contracts in cash and recognizes the gains and
losses on hedge transactions during the same time period as the related
physical transactions. Cash flows from the hedge contracts are reported in
the same category as cash flows from the hedged assets. Contracts which do
not have high correlation with the related physical transactions are
marked-to-market and recognized in the current-period income.

INTEREST-RATE RISK MANAGEMENT: The Company borrows funds under both fixed and
variable interest rate arrangements. Variable-rate agreements expose the
Company to market risk related to changes in interest rates.

CREDIT RISK: The Company's primary market areas are the Rocky Mountain
regions of the United States and Canada and the Midcontinent region of the
United States. Exposure to credit risk may be impacted by the concentration
of customers in these regions due to changes in economic or other conditions.
Customers include individuals and numerous industries that may be affected
differently by changing conditions. Management believes that its
credit-review procedures, loss reserves, customer deposits and collection
procedures have adequately provided for usual and customary credit-related
losses. Commodity-based hedging arrangements also expose the Company to
credit risk. The Company monitors the creditworthiness of its counterparties,
which generally are major financial institutions, and believes that losses
from non-performance are unlikely to occur.

INCOME TAXES: Questar files income tax reports on a consolidated basis in
accordance with the Internal Revenue Code and associated regulations.
Questar's subsidiaries account for income taxes on a separate-return basis.
Rate-regulated operations record cumulative increases in deferred taxes as
income taxes recoverable from customers. Questar Gas and Questar Pipeline
have adopted procedures with their regulatory commissions to include
under-provided deferred taxes in customer rates on a systematic basis.
Questar Gas and Questar Pipeline use the deferral method to account for
investment tax credits as required by regulatory commissions.

EARNINGS PER SHARE: The Company presents basic and diluted earnings per share
(EPS) on the income statement. Basic EPS are computed by dividing net income
available to common shareholders by the weighted average number of common
shares outstanding during the accounting period. Diluted EPS includes the
potential dilution from exercising stock options, which is the reason for the
difference between the number of basic and diluted average shares outstanding.

COMPREHENSIVE INCOME: Comprehensive income is the sum of net income as
reported in the Consolidated Statement of Income and other comprehensive
income transactions reported in the Consolidated Statement of Shareholders'
Equity. Other comprehensive income transactions that currently apply to
Questar result from changes in the market value of securities held for sale
and changes in holding value resulting from foreign currency translation
adjustments. These transactions are not the culmination of the earnings
process, but result from periodically adjusting historical balances to fair
value. Income is realized when the securities available for sale are sold.
Income taxes associated with realized gains from selling securities available
for sale, which were included in other comprehensive income in prior years,
were $10.2 million in 2000, $23.4 million in 1999 and $1.9 million in 1998.
Beginning in 2001, other comprehensive income will include mark-to-market
adjustments of the Company's qualified energy derivatives. The balances of
cumulative other comprehensive income (loss) for the 12 months ended

December 31, were as follows:



                                                                            2000            1999
                                                                          -------------------------
                                                                           (IN THOUSANDS)
                                                                                     
Unrealized gain on securities                                              $13,832         $39,285
Foreign currency translation adjustment (Restated)                          (1,245)           (228)
                                                                          -------------------------
Cumulative other comprehensive income                                      $12,587         $39,057
                                                                          =========================


BUSINESS SEGMENTS: Questar's line-of-business disclosures are presented based on
the way senior management evaluates the performance of its business segments.
Certain intersegment sales include intercompany profit.


                                       30


NEW ACCOUNTING STANDARD: The Company is required to adopt the accounting
provisions of Statement of Financial Accounting Standards 133, as amended,
"Accounting for Derivative Instruments and Hedging Activities" (SFAS 133)
beginning in January 2001. SFAS 133 addresses the accounting for derivative
instruments, including certain derivative instruments embedded in other
contracts. Under the standard, entities are required to carry all derivative
instruments in the balance sheet at fair value. The accounting for changes in
fair value, which result in gains or losses, of a derivative instrument
depends on whether such instrument has been designated and qualifies as part
of a hedging relationship and, if so, depends on the reason for holding it.
If certain conditions are met, entities may elect to designate a derivative
instrument as a hedge of exposure to changes in fair value, cash flows or
foreign currencies. If the hedged exposure is a fair-value exposure, the gain
or loss on the derivative instrument is recognized in earnings in the period
of the change together with the offsetting loss or gain on the hedged item
attributable to the risk being hedged. If the hedged exposure is a cash-flow
exposure, the effective portion of the gain or loss on the derivative
instrument is reported initially as a component of other comprehensive income
in the shareholders' equity section of the balance sheet and subsequently
reclassified into earnings when the forecasted transaction affects earnings.
Any amounts excluded from the assessment of hedge effectiveness, as well as
the ineffective portion of the gain or loss, is reported in earnings
immediately.

As of January 1, 2001, the Company structured a majority of its energy
derivative instruments as cash flow hedges. As a result of adopting SFAS 133
in January 2001, the Company expects to record a liability for derivative
instruments of approximately $121 million. The offset to this amount, net of
income taxes, will be recorded as a loss in other comprehensive income in the
shareholders' equity section of the balance sheet. The fair-value calculation
does not consider changes in fair value of the corresponding scheduled
physical transactions. The Company has identified a number of contracts that
are derivative instruments as defined by SFAS 133, but are specifically
excluded from the provisions of SFAS 133 on the basis of normal sales and
purchase transactions. These contracts are primarily located in the natural
gas distribution and transmission activities.

RECLASSIFICATIONS: Certain reclassifications were made to the 1999 and 1998
financial statements to conform with the 2000 presentation.

NOTE 2 - SUBSEQUENT EVENT - ACQUISITION

Market Resources acquired 100% of the common stock of Shenandoah Energy, Inc.
(SEI) on July 31, 2001 for $403 million in cash including assumed debt. SEI
was a privately held Denver-based exploration, production, gathering and
drilling company. Market Resources obtained an estimated 415 billion cubic
feet equivalent of proved oil and gas reserves, gas processing capacity of
100 MMcf per day, 90 miles of gathering lines, 114,000 acres of net
undeveloped leasehold acreage and four drilling rigs. SEI operations are
located primarily in the Uintah Basin of eastern Utah. The transaction was
accounted for as a purchase business combination in accordance with
accounting principles generally accepted in the United States. The purchase
price in excess of the estimated fair value of the assets was assigned to
goodwill. The acquisition was financed through bank borrowings.


                                       31


Note 3 - Debt

Questar has short-term line-of-credit arrangements with several banks under
which it may borrow up to $220 million. These lines have interest rates
generally below the prime interest rate. Commercial paper borrowings are backed
by the short-term line-of-credit arrangements. The details of short-term debt
are as follows:



                                                                                 DECEMBER 31,
                                                                            2000            1999
                                                                       ------------------------------
                                                                                (In Thousands)
                                                                                    
Commercial paper with variable interest rates                             $181,100        $128,379
Bank loans with variable interest rates                                     28,039          15,736
                                                                       ------------------------------
                                                                          $209,139        $144,115
                                                                       ==============================

Weighted average interest rate at December 31                                6.68%           6.14%


The details of long-term debt are as follows:



                                                                                DECEMBER 31,
                                                                            2000            1999
                                                                       ------------------------------
                                                                               (IN THOUSANDS)
                                                                                    
Questar Market Resources
  Revolving-credit loan due 2001- 2005 with variable
     interest rates (7.01% at December 31, 2000)                          $244,377        $264,894
Questar Regulated Services - Natural gas distribution
  Medium-term notes 6.85% to 8.43%, due 2007
    to 2024                                                                225,000         225,000
Questar Regulated Services - Natural gas transmission
  Medium-term notes 5.85% to 7.55%, due 2008
    to 2019                                                                130,400         130,400
  9 3/8% debentures due 2021                                                85,000          85,000
  9 7/8% debentures due 2020                                                30,000          30,000
Corporate and other                                                            148             155
                                                                       ------------------------------
    Total long-term debt outstanding                                       714,925         735,449
 Less current portion                                                            8               7
 Less unamortized debt discount                                                380             399
                                                                       ------------------------------
                                                                          $714,537        $735,043
                                                                       ==============================


Maturities of long-term debt for the five years following December 31, 2000, in
thousands of dollars are as follows:

    2001                                                        $8
    2002                                                     6,977
    2003                                                    16,978
    2004                                                   186,980
    2005                                                     6,981

Cash paid for interest was $66,833,000 in 2000, $56,019,000 in 1999 and
$49,430,000 in 1998.

As of December 31, 2000, Questar Pipeline guaranteed $100 million of
long-term debt borrowed by TransColorado Gas Transmission Company. The
partnership has borrowed $200 million under a three-year revolving-credit
arrangement that will expire unless renewed by October 2001.


                                       32


Market Resources revolving-credit loan contains covenants specifying a
minimum amount of net equity and a maximum ratio of debt to equity. On March
6, 2001, Market Resources issued in a public offering $150 million of 7.5%
notes due 2011. Market Resources applied the proceeds of the debt offering to
repay a portion of its outstanding floating-rate debt. On February 27, 2001,
Questar Pipeline gave notice that it will redeem $30 million of its 9 7/8%
debentures on March 30, 2001. The redemption price is equal to 104.67% of the
principal amount plus interest from December 1, 2000.

Note 4 - Common Stock

Dividend Reinvestment and Stock Purchase Plan: The Dividend Reinvestment and
Stock Purchase Plan (Reinvestment Plan) allows parties interested in owning
Questar common stock to reinvest dividends or invest additional funds in
common stock. The Company can use unissued shares or purchase shares in the
open market in order to meet shareholders' purchase demands. The Reinvestment
Plan issued total shares of 322,062, 371,985 and 329,794 in 2000, 1999 and
1998, respectively. At December 31, 2000, 1,920,761 shares were reserved for
future issuance.

Employee Investment Plan: The Employee Investment Plan (Plan) allows eligible
employees to purchase shares of Questar Corporation common stock or other
investments through payroll deduction. Since January 1, 1999, the Company has
matched 80% of employees-pretax purchases up to a maximum of 6%. Prior to
that date, the Company matched 75% of employees' eligible contributions. The
Company's expense equals its matching contribution. Questar's expense and
contribution to the Plan amounted to $5,042,000, $4,713,000 and $4,542,000
for the years ended December 31, 2000, 1999 and 1998, respectively.

Stock Plans: The Company has a Long-term Stock Incentive Plan for officers
and employees and a Stock Option Plan for nonemployee directors (Stock
Plans). The number of shares made available for a given year for options or
other stock awards under the Long-term Stock Incentive Plan is 1% of the
outstanding shares of common stock on the first day of the calendar year. The
current plan was amended March 1, 2011, subject to shareholders approval. The
option price equals the market price of the stock on the grant date. Stock
options for employees have a 10-year life and vest in four equal annual
installments beginning six months after grant date. Nonemployee directors may
receive shares of common stock instead of cash in payment for directors fees
under a separate plan. At December 31, 2000 there were 90,729 shares
available for future issuance under this plan.

No compensation expense is recorded for stock options issued to employees or
directors because the exercise price equals the market price on the date of
issue. If compensation expense had been recorded, it would be based on an
estimate of the fair value of stock options granted and would reduce earnings
per share by $.03 in 2000 and 1998 and $.02 in 1999. For purposes of the
pro-forma expense, the weighted average fair value of the options was
amortized over the vesting period. The pro-forma estimates rely upon
subjective assumptions and the use of a mathematical model to estimate value,
and may not be representative of future results.


                                       33


Transactions involving option shares in the Stock Plans are summarized as
follows:



                                                                                       WEIGHTED AVERAGE
                                                          SHARES     PRICE RANGE        EXERCISE PRICE
                                                     --------------------------------------------------
                                                                                   
Balance at January 1, 1998                               2,940,610   $9.81 -$19.13          $16.22
Granted                                                    857,800           21.38           21.38
Cancelled                                                  (77,200)  13.69 - 21.38           17.33
Exercised                                                 (437,209)   9.81 - 16.81           14.72
                                                     --------------------------------------------------
Balance at December 31, 1998                             3,284,001     9.81- 21.38           17.74
                                                     --------------------------------------------------
Granted                                                    866,400           17.00           17.00
Cancelled                                                  (82,900)   9.81 - 21.38           17.94
Exercised                                                 (138,445)   9.81 - 16.81           14.44
                                                     --------------------------------------------------
Balance at December 31, 1999                             3,929,056    9.81 - 21.38           17.69
                                                     --------------------------------------------------
Granted                                                  1,289,050           15.00           15.00
Cancelled                                                  (89,254)  13.69 - 21.38           17.19
Exercised                                               (1,301,361)   9.81 - 21.38           15.99
                                                     --------------------------------------------------
Balance at December 31, 2000                             3,827,491   $9.81 -$21.38          $17.37
                                                     ==================================================

Exercisable at December 31, 2000                         2,464,368                          $17.98
Available for future grant at December 31, 2000          1,191,636


The stock options at December 31, 2000 had a weighted average remaining life
of 4.6 years. The fair value of the stock options was determined on the grant
date using the Black-Scholes option-valuation model. The calculated fair
value of options granted and major assumptions used in the model at the date
of grant were as follows:



                                                              2000           1999            1998
                                                          -----------------------------------------
                                                                                    
Fair value of options at grant date                          $3.38           $3.16           $3.94
Risk-free interest rate                                      6.79%           5.11%           5.56%
Expected price volatility                                    25.1%           20.6%           20.2%
Expected dividend yield                                      4.53%           3.88%           3.09%
Expected life in years                                         7.0             7.2             4.4


In addition to stock options, the Company issued restricted shares to officers
and employees as part of its payment of bonuses. Compensation expense is
recorded when the bonus is earned. Restricted stock vests in two equal, annual
installments beginning one year after grant. Stock is issued at the market price
on date of grant. Recipients of restricted stock awards are entitled to full
voting rights and receipt of dividends.



                                                             2000           1999            1998
                                                           ----------------------------------------
                                                                                   
Shares of restricted stock awarded                          46,053          16,919           7,620
Market price at award date                                  $28.01          $15.00          $17.00


Shareholder Rights: On February 13, 1996, Questar's Board of Directors
declared a stock-right dividend for each outstanding share of common stock.
The stock rights were issued March 25, 1996. The rights become exercisable if
a person, as defined, acquires 15% or more of the Company's common stock or
announces an offer for 15% or more of the common stock. Each right initially
represents the right to buy one share of the Company's common stock for
$87.50. Once any person acquires 15% or more of the Company's common stock,
the rights are automatically modified. Each right not owned by the 15% owner
becomes exercisable for the number of shares of Questar's stock that have a
market value equal to two times the exercise price of the right. This same
result occurs if a 15% owner acquires the Company through a reverse merger
when Questar and its stock survive. If the Company is involved in a merger or
other business combination at any time after the rights become exercisable,
rightsholders will be entitled to


                                       34


buy shares of common stock in the acquiring company having a market value
equal to twice the exercise price of each right. The rights may be redeemed
by the Company at a price of $.005 per right until 10 days after a person
acquires 15% ownership of the common stock. The rights expire March 25, 2006.

Note 5 -  Financial Instruments and Risk Management

The carrying value and estimated fair values of the Company's financial
instruments were as follows:



                                                               DECEMBER 31, 2000              DECEMBER 31, 1999
                                                          ---------------------------------------------------------
                                                           CARRYING       ESTIMATED        CARRYING       ESTIMATED
                                                            VALUE         FAIR VALUE        VALUE        FAIR VALUE
                                                          ---------------------------------------------------------
                                                                            (IN THOUSANDS)
                                                                                             
Financial assets
    Cash and cash equivalents                               $9,416          $9,416          $8,291         $8,291
Financial liabilities
    Short-term loans                                       209,139         209,139         144,115        144,115
    Long-term debt                                         714,545         735,554         735,050        728,273
Gas and oil price-hedging contracts                                        (98,000)                        (6,200)


The Company used the following methods and assumptions in estimating fair
values: CASH AND CASH EQUIVALENTS AND SHORT-TERM LOANS - the carrying amount
approximates fair value; LONG-TERM DEBT - the carrying amount of
variable-rate debt approximates fair value. The fair value of fixed-rate debt
is based on quoted market prices, and on the discounted present value of cash
flows using the Company's current borrowing rates; GAS AND OIL PRICE-HEDGING
CONTRACTS - the mark-to-market adjustment of contracts is based on market
prices as posted on the NYMEX from the last trading day of the year.

The average price of the oil contracts at December 31, 2000, was $18.30 per
barrel and was based on the average of fixed amounts in contracts which
settle against the NYMEX. All oil contracts relate to Company-owned
production where basis adjustments would result in a net to the well price of
$17.20 per barrel. The average price of the gas contracts at December 31,
2000 was $3.87 per MMBtu representing the average of contracts with different
terms including fixed, various "into the pipe" postings and NYMEX references.
Gas-hedging contracts were in place for Market Resources-owned production and
gas-marketing transactions. Removing transportation and heat-value
adjustments on the hedges of Company-owned gas as of December 31, 2000, would
result in a price between $2.90 and $3.15 per Mcf, net back to the well.

Fair value is calculated at a point in time and does not represent the amount
the Company would pay to retire the debt securities. In the case of gas and
oil price-hedging activities, the fair value calculation does not consider
the the fair value of the corresponding scheduled physical transactions
(i.e., the correlation between the index price and the price to be realized
for the physical delivery of gas or oil production).

ENERGY-PRICE RISK MANAGEMENT

Market Resources held hedge contracts covering the price exposure for about
50.5 million dth of gas and 1 million barrels of oil at December 31, 2000. A
year earlier the contracts covered 72.1 million dth of natural gas and 2.4
million barrels of oil. The hedging contracts exist for a significant share
of Questar-owned gas and oil production and for a portion of gas-marketing
transactions. The contracts at December 31, 2000, had terms extending through
December 2003, with about 91% of those contracts expiring by the end of 2001.
A primary objective of energy-price hedging is to protect product sales from
adverse changes in energy prices. The Company does not enter into hedging
contracts for speculative purposes.


                                       35


SECURITIES AVAILABLE FOR SALE

Securities available for sale represent equity instruments traded on national
exchanges. The value of these investments is subject to day-to-day market
volatility. Common shares of Nextel Communications, XO Communications and
ParkerVision represented the Company's primary investments. At December 31,
2000, the Company holdings amounted to 803,000 shares of Nextel, 214,000
shares of ParkerVision and 237,000 shares of XO.

CREDIT RISK.

The Company's primary market areas are the Rocky Mountain regions of the
United States and Canada and the Midcontinent region of the United States.
Exposure to credit risk may be impacted by the concentration of customers in
these regions due to changes in economic or other conditions. Customers
include individuals and numerous industries that may be affected differently
by changing conditions. Management believes that its credit-review
procedures, loss reserves, customer deposits and collection procedures have
adequately provided for usual and customary credit-related losses.
Commodity-based hedging arrangements also expose the Company to credit risk.
The Company monitors the creditworthiness of its counterparties, which
generally are major financial institutions, and believes that losses from
non-performance are unlikely to occur.

Note 6 - Income Taxes  (Restated)

Details of Questar's income tax expenses and deferred income taxes are
provided in the following tables. The components of income taxes were as
follows:




                                                                     YEAR ENDED DECEMBER 31,
                                                             2000           1999            1998
                                                         --------------------------------------------
                                                                       (IN THOUSANDS)
                                                                                  
Federal
  Current                                                  $24,758         $43,326         $39,454
  Deferred                                                  47,098          (2,745)         (4,094)
State
  Current                                                    4,067           6,602           3,918
  Deferred                                                     801             776             505
Deferred investment tax credits                               (386)           (387)           (387)
Foreign income taxes                                         2,101            (885)         (3,349)
                                                         --------------------------------------------
                                                           $78,439         $46,687         $36,047
                                                         ============================================



                                       36



The difference between income tax expense reported and the tax computed by
applying the statutory federal income tax rate of 35% to income before income
taxes is explained as follows:



                                                                   YEAR ENDED DECEMBER 31,
                                                             2000           1999            1998
                                                         ------------------------------------------
                                                                         (IN THOUSANDS)
                                                                                 
Income before income taxes                                $227,916        $143,539        $125,357
                                                         ==========================================

Federal income taxes at 35%                                $79,771         $50,239         $43,875
State income taxes, net of federal income
  tax benefit                                                3,107           4,789           2,505
Nonconventional fuel credits                                (6,453)         (7,154)         (7,953)
Investment tax credits utilized                               (386)           (387)           (387)
Deferred taxes related to regulated assets
  that were not provided in prior years                        921             921             922
Tax benefits from dividends paid to ESOP                                      (398)           (840)
Foreign income taxes                                           723            (189)           (964)
Other                                                          756          (1,134)         (1,111)
                                                         ------------------------------------------
  Income tax expense                                       $78,439         $46,687         $36,047
                                                         ==========================================

Effective income tax rate                                    34.4%           32.5%           28.8%


Significant components of the Company's deferred income taxes were as follows:



                                                                                DECEMBER 31,
                                                                            2000            1999
                                                                         --------------------------
                                                                               (IN THOUSANDS)
                                                                                    
Deferred tax liabilities
  Property, plant and equipment                                           $227,633        $193,041
  Mark-to-market adjustments of securities
    available for sale                                                       8,568          24,333
  Other                                                                      9,977          13,557
                                                                         --------------------------
    Total deferred tax liabilities                                         246,178         230,931

Deferred tax assets
  Associated with write-down
     of investment in partnership                                           11,806          18,706
  Alternative minimum tax and nonconventional-
    fuel-credit carryforwards                                                    3           2,468
  Deferred compensation                                                      7,443           4,910
  Depletion and ITC carryforwards                                            1,995           2,140
  Other                                                                     11,795          13,693
                                                                         --------------------------
    Total deferred tax assets                                               33,042          41,917
                                                                         --------------------------
       Deferred income taxes - noncurrent                                 $213,136        $189,014
                                                                         ==========================

Deferred income taxes - current
  Purchased -gas adjustment                                                $13,515            $164
                                                                         ==========================


Cash paid for income taxes was $54,088,000, $35,244,000 and $35,036,000 in
2000, 1999 and 1998, respectively.


                                       37


Note 7 - Litigation and Commitments

BRIDENSTINE VS. KAISER-FRANCIS OIL COMPANY

On January 4, 2001, a district court judge in Texas County, Oklahoma,
approved the settlement agreement reached by the Questar defendants and Union
Pacific Resources Company, predecessor in interest to Questar Exploration &
Production (QE&P), as defendants in the Bridenstine case. Under the terms of
the settlement, the Company and Union Pacific Resources paid a total of $22.5
million ($16.5 million by the Company) to resolve all of the issues in the
litigation. The Questar defendants disputed plaintiffs' claims, but settled
the lawsuit to avoid the uncertainty of a jury verdict. Payment of the
settlement funds did not have a material adverse effect on the Company's
results of operations, financial position, or liquidity.

TRANSCOLORADO CASE

Questar TransColorado Inc. (QTC) and its partner, KN TransColorado, Inc.,
(KNTC) in the TransColorado Gas Transmission Company (TransColorado) are
involved in a complex lawsuit that is pending in a state district court in
Colorado. At the center of the lawsuit is the validity of a contractual right
claimed by QTC to put its 50% interest in TransColorado to KNTC during the
12-month period beginning March 31, 2001.

KNTC originally filed a lawsuit in June of 2000 alleging that Questar
Pipeline and its affiliates breached their fiduciary duties to TransColorado
and KNTC by developing a plan to construct and operate a new pipeline that
would compete with TransColorado, rendering TransColorado economically
unviable. KNTC is seeking damages in excess of $150 million plus punitive
damages; a declaratory judgment that KNTC's obligation to purchase QTC's
interest in the project be declared void and unforceable; and a dissolution
of the partnership under Colorado law. QTC and its affiliates subsequently
filed a counterclaim and third-party complaint against KNTC and named
affiliates, including Kinder Morgan, Inc., seeking a declaratory judgment
that its contractual right to exercise the put is binding and enforceable and
damages of at least $185 million.

The trial judge denied the motion filed by the Questar defendants to stay the
proceedings and remove some issues to be considered by the FERC. The parties
have entered into a standstill agreement that preserves the claims made by
Questar and by KNTC pending the resolution of the litigation. On December 31,
2000, QTC gave notice of its election to exercise its contractual right to
sell its 50% interest in TransColorado to KNTC. The parties have agreed to
hire an outside party to operate the TransColorado pipeline during the
pending litigation. The trial is scheduled for February of 2002.

GRYNBERG LAWSUITS

Questar affiliates are named defendants in a lawsuit filed by independent gas
producer Jack J. Grynberg under the Federal False Claims Act. This case and
the 75 substantially similar cases filed by Grynberg against pipelines and
their affiliates have been consolidated for discovery and pre-trial rulings
in Wyoming federal district court. The cases involve allegations of industry
wide mismeasurement and undervaluation of gas on which royalty payments are
due the federal government. The complaint seeks treble damages and imposition
of civil penalties. The Wyoming district court judge has not ruled on the
defendants' motion to dismiss.

Grynberg has filed a case against Questar Pipeline, Questar Energy Trading
and Questar Gas Management in Utah state district court, alleging
mismeasurement of gas volumes attributable to his working ownership interest
in a specified property in southwestern Wyoming. Grynberg alleges breach of
contract, negligent misrepresentation, fraud, breach of fiduciary duty, etc.
On March 13, 2001, the trial judge granted defendants' motion to dismiss a
case by Grynberg.

It is too early to estimate the outcome of the other cases filed by Grynberg
against Questar affiliates.

There are various other legal proceedings against Questar and its
subsidiaries. While it is not currently possible to predict or determine the
outcomes of these proceedings, it is the opinion of management that the
outcomes will not have a materially adverse effect on the Company's results
of operations, financial position or liquidity.


                                     38


COMMITMENTS

Historically, 45% to 50% of Questar Gas's gas-supply portfolio has been
provided from company-owned gas reserves at the cost of service. The
remainder of the gas supply has been purchased from various suppliers under
agreements with a duration of one year or less and index-based pricing.
Generally, at the conclusion of the heating season and after a bid process,
new agreements for the upcoming heating season are put into place. Questar
Gas bought significant quantities of natural gas under purchase agreements
amounting to $184 million, $93 million and $100 million in 2000, 1999 and
1998, respectively. In addition, Questar Gas makes use of various storage
arrangements to meet peak-gas demand during certain times of the heating
season.

Questar Energy Trading has contracted for firm-transportation services with
various pipelines to transport 76.2 Mdths per day of gas. The contracts
extend for the next six years and have an annual cost of approximately $3
million. Due to market conditions and competition, it is possible that
Questar Energy Trading may be unable to sell enough gas to fully utilize the
contracted capacity.

Questar sold its headquarters building under a sale and lease-back
arrangement in November 1998. The operating agreement commits the Company to
occupy the building for the next 11 years with an option for renewal. The
minimum future payments under the terms of long-term operating leases for the
Company's primary office locations, including its headquarters building, for
the five years following December 31, 2000, are as follows:



                                                     (IN THOUSANDS)
                                                  
2001                                                        $4,507
2002                                                         4,314
2003                                                         4,155
2004                                                         3,677
2005                                                         3,633
Thereafter                                                  37,121


Total minimum future rental payments have not been reduced for sublease
rental receipts of $187,000, and $24,000, which are expected to be received
in the years ended December 31, 2001, and 2002, respectively. Total rental
expense amounted to $4,402,000 in 2000, $4,321,000 in 1999 and $563,000 in
1998. Sublease rental receipts were $96,000 in 2000 and $94,000 in 1999.

Note 8 - Rate Regulation and Other Matters

STATE RATE REGULATION

On August 11, 2000, the Public Service Commission of Utah (PSCU) issued an
order in the general rate case filed by Questar Gas. The PSCU granted $13.5
million in general rate relief and authorized an 11% return on equity. The
$13.5 million in general rate relief includes the $7.1 million in interim
rate relief that Questar Gas was authorized to collect, subject to refund,
effective January 1, 2000. The PSCU's order allows Questar Gas to collect $5
million of carbon-dioxide-processing costs yearly.

In February 2000, the Public Service Commission of Wyoming (PSCW) reaffirmed
Questar Gas's 11.83% authorized return on equity in a general rate case
filing and approved the request for a $377,000 rate reduction. Cost
efficiencies and slower population growth in Wyoming compared with Utah,
enabled Questar Gas to reduce its rates in Wyoming. The PSCW's rate-ruling
also ordered the Company to transfer the recovery of carbon dioxide gas
processing costs from gas costs to general rates beginning April 2000.

Questar Gas routinely files semi-annual applications with the PSCU and the
PSCW requesting permission to reflect annualized gas cost increases or
decreases depending on gas prices. These requests for gas cost increases or
decreases are passed on to customers on a dollar-for-dollar basis with no
markup.


                                      39



On May 31, 2000, Questar Gas filed with the PSCW to reflect annualized gas
costs of $11.1 million in rates for Wyoming customers. The filing reflected a
$53,000 increase from the previous filing. The PSCW authorized Questar Gas to
reflect the request in rates effective July 1, 2000. On June 14, 2000,
Questar Gas filed a request with the PSCU to reflect annualized gas costs of
$286.6 million in rates for Utah customers effective July 1, 2000. The
request slightly decreased rates for residential and commercial customers.
However, the PSCU, by an interim order, chose to make no adjustment in rates.

Due to the rapidly rising gas prices caused by a high demand for energy,
Questar Gas filed an out-of-period pass-on application on September 19, 2000,
with the PSCW seeking approval to reflect an increase of annualized gas costs
of $2.5 million in rates for Wyoming customers. The PSCW authorized the
requested gas-cost increase in rates effective October 1, 2000. On September
20, 2000, Questar Gas filed a special pass-through application with the PSCU
requesting permission to reflect annualized gas cost increases of $63.5
million in rates for Utah customers. The PSCU, by interim order, authorized
Questar Gas to reflect the increase in rates effective October 1, 2000.

As a result of a continuing growing demand for energy and the accompanying
pressure on energy prices, Questar Gas filed on December 19, 2000, with the
PSCU to reflect a $167.5 million increase of annualized gas cost in rates for
Utah customers. The PSCU, by interim order, authorized Questar Gas to reflect
the increase in rates effective January 1, 2001. On December 19, 2000,
Questar Gas filed an application with the PSCW to increase gas costs in
Wyoming rates by $7.1 million. The PSCW authorized the increase in Wyoming
gas rates effective January 1, 2001.

FEDERAL RATE REGULATION

The Federal Energy Regulatory Commission (FERC) issued a final order granting
a certificate of public convenience and necessity to Questar's Southern
Trails Pipeline. The FERC's July 28, 2000, ruling came after the agency
became satisfied that the pipeline was in the public convenience and
necessity and could be completed in an environmentally sound manner. The
California State Lands Commission has formally certified the Environmental
Impact Report for the Southern Trails Pipeline. Questar Pipeline is actively
working on right-of-way issues and exploring marketing opportunities to
subscribe Southern Trail's pipeline capacity.

Questar Pipeline has received a preliminary determination from the FERC to
construct a 75-mile natural gas pipeline from the Price area in eastern Utah
to a proposed interconnect with Kern River Gas Transmission Co. near Elberta,
Utah. A final order is contingent upon completion of an environmental impact
statement. The proposed expansion of Questar Pipeline's interstate system
will parallel an existing Questar pipeline for 57 miles from Price to Payson,
Utah. The $80 million project, referred to as Main Line 104, will be 24
inches in diameter, with a maximum operating pressure of 1,400 pounds per
square inch.

Note 9 - Employee Benefits

Pension Plan: The Company has a defined-benefit pension plan covering the
majority of its employees. Benefits are generally based on the employee's age
at retirement, years of service and highest earnings in a consecutive 72
pay-period interval during the ten years preceding retirement. The Company's
policy is to make contributions to the plan at least sufficient to meet the
minimum funding requirements of the Internal Revenue Code. Plan assets
consist principally of equity securities and corporate and U.S. government
debt obligations.

The Company offered early retirement windows to specific groups of employees
in 2000, 1999 and 1998. Questar's Regulated Services has offered early
retirement windows to eligible employees in 2000 and 1998. In 2000, a total
of 276 employees and recipients of long-term disability from Questar Gas,
Questar Pipeline and Questar Regulated Services elected to retire effective
October 31. The $14.4 million cost of the early retirement window will be
amortized over a five-year period in accordance with regulatory treatment. In
1998, Regulated Services offered an early retirement window that was accepted
by 178 eligible employees. The $3.1 million cost of the window is being
amortized over a five-year period beginning August 1998.


                                       40


Questar InfoComm, which conducts telecommunications and
information-technology services, announced an early retirement program
effective November 1, 1999. Fifty employees elected to retire and the $2.9
million cost was expensed in 1999.

A summary of pension expense is as follows:



                                                                  YEAR ENDED DECEMBER 31,
                                                             2000           1999            1998
                                                          ------------------------------------------
                                                                       (IN THOUSANDS)
                                                                                  
Service cost                                                $7,354          $8,894          $7,746
Interest cost                                               18,447          18,814          18,617
Expected return on plan assets                             (23,782)        (24,059)        (23,016)
Prior service and other costs                                1,581           1,365             872
Recognized net actuarial gain                                 (552)
Early retirement expenses                                    1,340           3,744             530
                                                          ------------------------------------------
    Pension expense                                         $4,388          $8,758          $4,749
                                                          ==========================================


Assumptions used to calculate pension expense were as follows:



                                                             2000            1999            1998
                                                          ------------------------------------------
                                                                                    
    Discount rate                                            7.75%           6.75%           6.75%
    Rate of increase in compensation                         5.00%           5.00%           5.00%
    Long-term return on assets                               9.25%           9.25%           8.50%


The status of the pension plan was as follows:



Pension Plan                                                2000           1999
                                                         --------------------------
                                                               (IN THOUSANDS)
                                                                    
Change in benefit obligation
  Projected benefit obligation at January 1,              $246,958        $252,799
    Service cost                                             7,354           8,894
    Interest cost                                           18,447          18,814
    Plan amendments                                          8,153           2,164
    Change in discount rate assumption                                     (42,321)
    Actuarial loss                                          34,096          35,264
    Benefits paid                                          (11,275)        (11,469)
    Early retirement settlements paid                      (80,946)        (17,187)
                                                         --------------------------
  Projected benefit obligation at December 31,             222,787         246,958
                                                         --------------------------

Change in plan assets
  Fair value of plan assets at January 1,                  274,907         264,632
    Actual return on plan assets                             4,284          32,831
    Contributions to the plan                                3,000           6,100
    Benefits paid                                          (11,275)        (11,469)
    Early retirement settlements paid                      (80,946)        (17,187)
                                                         --------------------------
  Fair value of plan assets at December 31,                189,970         274,907
                                                         --------------------------
Plan assets less the projected
    benefit obligation                                     (32,817)         27,949
  Unrecognized net actuarial (gain) loss                     3,053         (36,724)
  Unrecognized prior-service cost                           19,138          12,424
  Unrecognized transition obligation                            67             210
                                                         --------------------------
(Current liability) prepaid pension expense               ($10,559)         $3,859
                                                         ==========================



                                       41



Postretirement Benefits Other Than Pensions: Postretirement health-care
benefits and life insurance are provided only to employees hired before
January 1, 1997. The Company pays a portion of the costs of health-care
benefits, as determined by an employee's years of service, and limited to
170% of the 1992 contribution. The Company's policy is to fund amounts
allowable for tax deduction under the Internal Revenue Code. Plan assets
consist of equity securities and corporate and U.S. government debt
obligations. The Company is amortizing its transition obligation over a
20-year period, which began in 1992.

Regulated Services accounts for approximately 50% of the postretirement
benefit costs. The impact of postretirement benefit costs on Questar's future
net income will be mitigated by the ability to recover these costs from
customers. The regulatory agencies allow Questar Gas and Questar Pipeline to
recover future costs if the amounts are funded in external trusts.

A summary of the expense of postretirement benefits other than pensions
follows:




                                                                    YEAR ENDED DECEMBER 31,
                                                             2000            1999            1998
                                                           --------------------------------------------
                                                                        (IN THOUSANDS)
                                                                                   
Service cost                                                  $823          $1,006          $1,138
Interest cost                                                4,979           4,545           4,094
Expected return on plan assets                              (3,241)         (2,831)         (1,830)
Amortization of transition obligation                        1,877           1,877           1,878
Amortization of regulatory liability                                           523
                                                           --------------------------------------------
   Postretirement-benefit expense                           $4,438          $5,120          $5,280
                                                           ============================================


Assumptions used to calculate postretirement benefit expense were as follows:



                                                           2000           1999            1998
                                                     ----------------------------------------------
                                                                            
Discount rate                                                7.75%           6.75%           6.75%
Long-term return on assets                                   9.25%           9.25%           8.50%
Health care inflation rate                                  10.00%          10.50%          11.00%
                                                     decreasing to   decreasing to   decreasing to
                                                      6.5% by 2008    5.5% by 2010    5.5% by 2010


A 1% increase in the health-care inflation rate would increase the service
cost and interest cost by $290,000 and the accumulated postretirement benefit
obligation by $3.3 million. A 1% decrease in the health-care inflation rate
would decrease the service cost and interest cost by $210,000 and the
accumulated postretirement benefit obligation by $2.8 million. The status of
the postretirement benefit programs was as follows:

Postretirement Benefits Other Than Pensions



                                                             2000           1999
                                                         ---------------------------
                                                                (IN THOUSANDS)
                                                                     
Change in benefit obligation
  Projected benefit obligation at January 1,               $66,169         $64,245
    Service cost                                               823           1,006
    Interest cost                                            4,979           4,545
    Actuarial gain                                            (701)           (498)
    Benefits paid                                           (3,406)         (3,129)
                                                         ---------------------------
  Projected benefit obligation at December 31,              67,864          66,169
                                                         ---------------------------



                                       42




                                                             2000           1999
                                                         ---------------------------
                                                               (IN THOUSANDS)
                                                                    
Change in plan assets
  Fair value of plan assets at January 1,                   35,302          30,845
    Actual return on plan assets                               389           3,732
    Contributions to the plan                                3,017           3,854
    Benefits paid                                           (3,406)         (3,129)
                                                         ---------------------------
  Fair value of plan assets at December 31,                 35,302          35,302
                                                         ---------------------------
    Projected benefit obligation
       in excess of plan assets                            (32,562)        (30,867)
    Unrecognized transition obligation                      22,529          24,406
    Unrecognized net gain                                   (2,442)         (4,594)
                                                         ---------------------------
    Accrued postretirement benefit
       liability recorded in current liabilities          ($12,475)       ($11,055)
                                                         ===========================


Postemployment Benefits: The Company recognizes the net present value of the
liability for postemployment benefits, such as long-term disability benefits
and health-care and life-insurance costs, when employees become eligible for
such benefits. Postemployment benefits are paid to former employees after
employment has been terminated but before retirement benefits are paid. The
Company accrues both current and future costs. In 2000, 14 former employees
of Questar Regulated Services and recipients of postemployment benefits
accepted early retirement benefits. Questar's postemployment liability at
December 31, 2000, 1999 and 1998 was $1,381,000, $2,347,000 and $2,452,000,
respectively.

Note 10 - Wexpro Settlement Agreement

Wexpro's operations are subject to the terms of the Wexpro settlement
agreement. The agreement was effective August 1, 1981, and sets forth the
rights of Questar Gas's utility operations to share in the results of
Wexpro's operations. The agreement was approved by the PSCU and PSCW in 1981
and affirmed by the Supreme Court of Utah in 1983. Major provisions of the
settlement agreement are as follows:

a. Wexpro continues to hold and operate all oil-producing properties previously
transferred from Questar Gas's nonutility accounts. The oil production from
these properties is sold at market prices, with the revenues used to recover
operating expenses and to give Wexpro a return on its investment. The after-tax
rate of return is adjusted annually and is approximately 13.64%. Any net income
remaining after recovery of expenses and Wexpro's return on investment is
divided between Wexpro and Questar Gas, with Wexpro retaining 46%.

b. Wexpro conducts developmental oil drilling on productive oil properties and
bears any costs of dry holes. Oil discovered from these properties is sold at
market prices, with the revenues used to recover operating expenses and to give
Wexpro a return on its investment in successful wells. The after-tax rate of
return is adjusted annually and is approximately 18.64%. Any net income
remaining after recovery of expenses and Wexpro's return on investment is
divided between Wexpro and Questar Gas, with Wexpro retaining 46%.

c. Amounts received by Questar Gas from the sharing of Wexpro's oil income are
used to reduce natural-gas costs to utility customers.

d. Wexpro conducts developmental gas drilling on productive gas properties
and bears any costs of dry holes. Natural gas produced from successful
drilling is owned by Questar Gas. Wexpro is reimbursed for the costs of
producing the gas plus a return on its investment in successful wells. The
after-tax return allowed Wexpro is approximately 21.64%.

e. Wexpro operates natural-gas properties owned by Questar Gas. Wexpro is
reimbursed for its costs of operating these properties, including a rate of
return on any investment it makes. This after-tax rate of return is
approximately 13.64%.


                                       43


Note 11 - Operations by Line of Business (Restated)
Following is a summary of operations by line of business for the Year Ended
December 31.



                                                QUESTAR REGULATED SERVICES
                                   -------------------------------------------------
                                     QUESTAR    NATURAL GAS    NATURAL GAS    OTHER   CORPORATE    INTERCOMPANY       QUESTAR
                                     MARKET     DISTRIBUTION   TRANSMISSION            & OTHER     TRANSACTIONS    CONSOLIDATED
                                    RESOURCES                                         OPERATIONS
                                   ---------------------------------------------------------------------------------------------
                                                                          (IN THOUSANDS)
                                                                                              
            2000
Revenues
  From unaffiliated customers      $649,200     $531,988        $42,500       $3,642   $38,823                     $1,266,153
  From affiliated companies          92,853        4,774         76,576          283    34,586    ($209,072)
                                   ---------------------------------------------------------------------------------------------
                                    742,053      536,762        119,076        3,925    73,409     (209,072)        1,266,153
Operating expenses
  Cost of natural gas and
      other products sold           369,752      334,193                       2,253    24,640     (168,609)          562,229
  Operating and maintenance         106,761      101,486         43,761        1,668    33,506      (35,705)          251,477
  Exploration                         7,917                                                                             7,917
  Depreciation, depletion and
    amortization                     85,025       34,450         15,391           35     7,590                        142,491
  Abandonment and impairment
    of oil and gas properties         3,418                                                                             3,418
  Other expenses                     41,020       10,213          3,071           35     1,073       (4,758)           50,654
                                   ---------------------------------------------------------------------------------------------
    Total operating expenses        613,893      480,342         62,223        3,991    66,809     (209,072)        1,018,186
                                   ---------------------------------------------------------------------------------------------
    Operating income (loss)         128,160       56,420         56,853          (66)    6,600                        247,967
Interest and other income             8,412        1,673          3,025        1,349    36,926      (11,922)           39,463
Income from unconsol. Affiliates      2,776                       1,220                                                 3,996
Debt expense                        (22,922)     (21,041)       (17,584)        (722)  (13,163)      11,922           (63,510)
Income tax expense                  (38,618)     (12,889)       (13,689)        (217)  (13,026)                       (78,439)
                                   ---------------------------------------------------------------------------------------------
    Net income                      $77,808      $24,163        $29,825         $344   $17,337                       $149,477
                                   =============================================================================================
Identifiable assets                $960,491     $830,889       $538,408      $19,640  $122,599                     $2,472,027
Investment in unconsol. affiliates   15,417                      19,088                                                34,505
Capital expenditures                187,359       65,767         43,035        1,167    17,814                        315,142

            1999
Revenues

  From unaffiliated customers      $418,603     $447,606        $36,922       $2,260   $18,828                       $924,219
  From affiliated companies          79,708        2,331         75,238          196    38,851    ($196,324)
                                   ---------------------------------------------------------------------------------------------
                                    498,311      449,937        112,160        2,456    57,679     (196,324)          924,219
Operating expenses
  Cost of natural gas and
      other products sold           239,201      257,265                         774     9,651     (154,337)          352,554
  Operating and maintenance          79,719      103,308         38,534        1,700    37,516      (39,695)          221,082
  Exploration                         5,321                                                                             5,321
  Depreciation, depletion and
    amortization                     73,028       36,426         16,743           14     5,953                        132,164
  Abandonment and impairment
    of oil and gas properties         7,535                                                                             7,535
  Other expenses                     23,808        7,625          2,488           24     1,071       (2,292)           32,724
                                   ---------------------------------------------------------------------------------------------
    Total operating expenses        428,612      404,624         57,765        2,512    54,191     (196,324)          751,380
                                   ---------------------------------------------------------------------------------------------
    Operating income (loss)          69,699       45,313         54,395          (56)    3,488                        172,839
Interest and other income             8,272        2,980          4,229        1,014    73,406      (11,201)           78,700
Income (loss) from
   unconsol. affiliates                 763                      (5,109)                   (10)                        (4,356)
Write-down of investment
in partnership                                                  (49,700)                                              (49,700)
Debt expense                        (17,363)     (20,062)       (17,466)        (605)   (9,649)      11,201           (53,944)
Income tax (expense) credit         (17,483)      (9,012)         5,260         (102)  (25,350)                       (46,687)
                                   ---------------------------------------------------------------------------------------------
    Net income (loss)               $43,888      $19,219        ($8,391)        $251   $41,885                        $96,852
                                   =============================================================================================



                                           44



                                                QUESTAR REGULATED SERVICES
                                   -------------------------------------------------
                                     QUESTAR    NATURAL GAS    NATURAL GAS    OTHER   CORPORATE    INTERCOMPANY       QUESTAR
                                     MARKET     DISTRIBUTION   TRANSMISSION            & OTHER     TRANSACTIONS    CONSOLIDATED
                                    RESOURCES                                         OPERATIONS
                                   ---------------------------------------------------------------------------------------------
                                                                          (IN THOUSANDS)
                                                                                              

Identifiable assets                $777,923     $722,290       $517,981      $11,423  $155,117                     $2,184,734
Investment in unconsol. affiliates   13,301                      11,724                    244                         25,269
Capital expenditures                128,248       68,447         50,424        1,385    13,479                        261,983

           1998

Revenues

  From unaffiliated customers      $382,791     $475,754        $37,156       $2,355    $8,200                       $906,256
  From affiliated companies          75,481        1,069         71,401           99    39,707    ($187,757)
                                   ---------------------------------------------------------------------------------------------
                                    458,272      476,823        108,557        2,454    47,907     (187,757)          906,256
Operating expenses
  Cost of natural gas and
      other products sold           230,462      281,004                       1,249     1,515     (146,298)          367,932
  Operating and maintenance          73,460       96,923         38,832        2,269    37,113      (40,406)          208,191
  Exploration                         6,069                                                                             6,069
  Depreciation, depletion and
    amortization                     64,965       33,261         13,927           17     6,575                        118,745
  Abandonment and impairment
    of oil and gas properties        15,137                                                                            15,137
  Other expenses                     26,041        8,185          2,600                  1,019       (1,053)           36,792
                                   ---------------------------------------------------------------------------------------------
    Total operating expenses        416,134      419,373         55,359        3,535    46,222     (187,757)          752,866
                                   ---------------------------------------------------------------------------------------------
    Operating income (loss)          42,138       57,450         53,198       (1,081)    1,685                        153,390
Interest and other income             2,457        3,566             78          655    22,756      (12,491)           17,021
Income (loss) from
     unconsolidated affiliates         (930)                      4,011                   (164)                         2,917
Debt expense                        (12,631)     (19,792)       (14,456)        (385)  (13,198)      12,491           (47,971)
Income tax (expense) credit          (4,886)     (13,816)       (14,940)         339    (2,744)                       (36,047)
                                   ---------------------------------------------------------------------------------------------
    Net income (loss)               $26,148      $27,408        $27,891        ($472)   $8,335                        $89,310
                                   =============================================================================================
Identifiable assets                $728,953     $699,727       $556,226       $8,519  $118,115                     $2,111,540
Investment in unconsol. affiliates    3,673                      54,712                    253                         58,638
Capital expenditures                248,676       76,328        114,318          493    15,662                        455,477


Questar Market Resources has subsidiaries that conducts gas and oil exploration
and production activities in western Canada. Canadian operations reported
revenues, measured in U. S. dollars, totaling $38.1 million, $12.3 million and
$10.5 million for the 12 months ended December 31, 2000, 1999, and 1998,
respectively. Total assets at December 31, stated in U. S. dollars, amounted to
$103.9 million, $31.0 million and $30.3 million in 2000, 1999 and 1998,
respectively.


                                         45


Note 12 - Quarterly Financial and Stock Price Information (Unaudited)
Following is a summary of quarterly financial and stock price data.
(Restated)



                                                          FIRST         SECOND         THIRD        FOURTH
                                                         QUARTER        QUARTER       QUARTER      QUARTER        YEAR
                                                      ---------------------------------------------------------------------
                                                                   (DOLLARS IN THOUSANDS, EXCEPT PER SHARE AMOUNTS)
                                                                                               
                       2000
Revenues                                                 $336,702      $232,542      $245,117     $451,792    $1,266,153
Operating income                                           78,653        41,240        43,521       84,553       247,967
Net income                                                 48,568        24,155        26,406       50,348       149,477
Basic earnings per common share                              0.60          0.30          0.33         0.63          1.86
Diluted earnings per common share                            0.60          0.30          0.33         0.62          1.85
Dividends per common share                                   0.17          0.17          0.17        0.175         0.685
Market price per common share
  High                                                     $19.00        $20.63        $28.00       $31.88        $31.88
  Low                                                      $13.56        $17.13        $18.88       $26.00        $13.56
  Close                                                    $18.56        $19.38        $27.81       $30.06        $30.06
Price-earnings ratio on closing price                                                                               16.3
Annualized dividend yield on closing price                   3.7%          3.5%          2.4%         2.3%          2.3%
Market-to-book ratio on closing price                                                                               2.55
Average number of common shares traded per day                233           169           237          280           230


                       1999

Revenues                                                 $277,814      $177,858      $183,070     $285,477      $924,219
Operating income                                           66,691        30,402        27,346       48,400       172,839
Net income                                                 42,926        22,966        15,051       15,909        96,852
Basic earnings per common share                              0.52          0.28          0.18         0.19          1.17
Diluted earnings per common share                            0.52          0.28          0.18         0.19          1.17
Dividends per common share                                  0.165         0.165          0.17         0.17          0.67
Market price per common share
  High                                                     $19.38        $19.94        $19.63       $19.13        $19.94
  Low                                                      $16.13        $15.81        $17.88       $14.75        $14.75
  Close                                                    $16.94        $19.13        $18.13       $15.00        $15.00
Price-earnings ratio on closing price                                                                               12.8
Annualized dividend yield on closing price                   3.9%          3.5%          3.8%         4.5%          4.5%
Market-to-book ratio on closing price                                                                               1.36
Average number of common shares traded per day                201           147           138          179           166


                       1998

Revenues                                                 $300,083      $179,157      $150,282     $276,734      $906,256
Operating income                                           68,590        25,724        18,604       40,472       153,390
Net income                                                 41,797        16,578         8,492       22,443        89,310
Basic earnings per common share                              0.51          0.20          0.10         0.27          1.08
Diluted earnings per common share                            0.50          0.20          0.10         0.27          1.08
Dividends per common share                                 0.1575         0.165         0.165        0.165        0.6525
Market price per common share
  High                                                     $22.28        $22.38        $19.81       $20.38        $22.38
  Low                                                      $20.19        $18.69        $15.81       $17.38        $15.19
  Close                                                    $20.78        $19.63        $19.25       $19.38        $19.38
Price-earnings ratio on closing price                                                                               17.9
Annualized dividend yield on closing price                   3.2%          3.4%          3.4%         3.4%          3.4%
Market-to-book ratio on closing price                                                                               1.89
Average number of common shares traded per day                171           165           169          188           173



                                       46


Note 13 - Supplemental Oil and Gas Information (Unaudited)

THE COMPANY USES THE SUCCESSFUL EFFORTS ACCOUNTING METHOD FOR ITS OIL AND GAS
EXPLORATION AND DEVELOPMENT activities. As ordered by the Public Service
Commission of Utah, the successful efforts method of accounting is utilized
with respect to costs associated with certain cost-of-service oil and gas
properties managed and developed by Wexpro and regulated for ratemaking
purposes. Cost-of-service oil and gas properties are those properties for
which the operations and return on investment are regulated by the Wexpro
settlement agreement (See Note 10).

Oil and Gas Exploration and Development Activities: The following information
is provided with respect to Questar's oil and gas exploration and development
activities, located in the United States and Canada.

CAPITALIZED COSTS (RESTATED)

The aggregate amounts of costs capitalized for oil and gas exploration and
development activities and the related amounts of accumulated depreciation
and amortization follow:



                                                                -----------------------------------------------------------
AS OF DECEMBER 31,                                                     UNITED STATES       CANADA          TOTAL
                                                                -----------------------------------------------------------
                                                                                           (IN THOUSANDS)
                                                                                                 
2000
  Proved properties                                                       $732,078        $113,407        $845,485
  Unproved properties                                                       30,940          24,668          55,608
  Support equipment and facilities                                          12,002           1,177          13,179
                                                                -----------------------------------------------------------
                                                                           775,020         139,252         914,272
  Accumulated depreciation, depletion and amortization                     361,401          50,105         411,506
                                                                -----------------------------------------------------------
                                                                          $413,619         $89,147        $502,766
                                                                ===========================================================

1999
  Proved properties                                                       $663,051         $54,096        $717,147
  Unproved properties                                                       41,654           9,970          51,624
  Support equipment and facilities                                          12,418             990          13,408
                                                                -----------------------------------------------------------
                                                                           717,123          65,056         782,179
  Accumulated depreciation, depletion and amortization                     314,986          38,413         353,399
                                                                -----------------------------------------------------------
                                                                          $402,137         $26,643        $428,780
                                                                ===========================================================

1998

  Proved properties                                                       $656,085         $47,069        $703,154
  Unproved properties                                                       34,736          11,478          46,214
  Support equipment and facilities                                          13,949             929          14,878
                                                                -----------------------------------------------------------
                                                                           704,770          59,476         764,246
  Accumulated depreciation, depletion and amortization                     284,252          32,849         317,101
                                                                -----------------------------------------------------------
                                                                          $420,518         $26,627        $447,145
                                                                ===========================================================



                                       47


COSTS INCURRED (RESTATED)

The following costs were incurred in oil and gas exploration and development
activities:



                                                   ---------------------------------------------------
YEAR ENDED DECEMBER 31,                                UNITED STATES       CANADA           TOTAL
                                                   ---------------------------------------------------
                                                                       (IN THOUSANDS)
                                                                                   
2000
Property acquisition
  Unproved                                                  $3,054         $14,703         $17,757
  Proved                                                     1,202          31,058          32,260
Exploration                                                  6,433           3,664          10,097
Development                                                 64,582          29,478          94,060
                                                   ---------------------------------------------------
                                                           $75,271         $78,903        $154,174
                                                   ===================================================

1999
Property acquisition
  Unproved                                                 $12,565            $337         $12,902
  Proved                                                     2,367              17           2,384
Exploration                                                  8,402             323           8,725
Development                                                 53,347           3,608          56,955
                                                   ---------------------------------------------------
                                                           $76,681          $4,285         $80,966
                                                   ===================================================

1998
Property acquisition
  Unproved                                                 $29,343            $144         $29,487
  Proved                                                   126,723           3,131         129,854
Exploration                                                 10,187           2,122          12,309
Development                                                 42,875           4,477          47,352
                                                   ---------------------------------------------------
                                                          $209,128          $9,874        $219,002
                                                   ===================================================


RESULTS OF OPERATIONS (RESTATED)

Following are the results of operations of Market Resources' oil and gas
exploration and development activities, before corporate overhead and interest
expenses. In 1998, oil and gas properties were written down due to lower energy
prices.



                                                   ---------------------------------------------------
                                                          UNITED
                                                          STATES          CANADA           TOTAL
                                                   ---------------------------------------------------
YEAR ENDED DECEMBER 31, 2000                                       (IN THOUSANDS)
                                                                               
Revenues
   From unaffiliated customers                            $207,656         $38,072        $245,728
   From affiliates                                              18                              18
                                                   ---------------------------------------------------
      Total revenues                                       207,674          38,072         245,746
                                                   ---------------------------------------------------
Production expenses                                         49,116           9,370          58,486
Exploration                                                  5,533           2,442           7,975
Depreciation, depletion and amortization                    51,973          13,196          65,169
Abandonment and impairment of oil
   and gas properties                                        2,327           1,091           3,418
                                                   ---------------------------------------------------
Total expenses                                             108,949          26,099         135,048
                                                   ---------------------------------------------------
Revenues less expenses                                      98,725          11,973         110,698
Income taxes - Note A                                       31,972           5,580          37,552
                                                   ---------------------------------------------------
Results of operations before corporate
    overhead and interest expenses                         $66,753          $6,393         $73,146
                                                   ===================================================


                                       48


YEAR ENDED DECEMBER 31, 1999
Revenues                                                  $150,159         $12,316        $162,475
                                                   ---------------------------------------------------
Production expenses                                         41,948           3,681          45,629
Exploration                                                  4,803             321           5,124
Depreciation, depletion and amortization                    51,927           3,550          55,477
Abandonment and impairment of oil
    and gas properties                                       5,542           1,993           7,535
                                                   ---------------------------------------------------
Total expenses                                             104,220           9,545         113,765
                                                   ---------------------------------------------------
Revenues less expenses                                      45,939           2,771          48,710
Income taxes - Note A                                       12,313           1,233          13,546
                                                   ---------------------------------------------------
Results of operations before corporate
    overhead and interest expenses                         $33,626          $1,538         $35,164
                                                   ===================================================

YEAR ENDED DECEMBER 31, 1998
Revenues                                                  $125,035         $10,474        $135,509
                                                   ---------------------------------------------------
Production expenses                                         38,788           3,004          41,792
Exploration                                                  4,434           1,332           5,766
Depreciation, depletion and amortization                    45,301           3,302          48,603
Abandonment and impairment of oil
    and gas properties                                      10,045           5,092          15,137
                                                   ---------------------------------------------------
Total expenses                                              98,568          12,730         111,298
                                                   ---------------------------------------------------
Revenues less expenses                                      26,467          (2,256)         24,211
Income taxes - Note A                                        5,514            (896)          4,618
                                                   ---------------------------------------------------
Results of operations before corporate
    overhead and interest expenses                         $20,953         ($1,360)        $19,593
                                                   ===================================================


Note A - Income tax expenses has been reduced by nonconventional fuel tax
credits of $4,655,000 in 2000, $5,282,000 in 1999 and $5,736,000 in 1998.



                                        49


ESTIMATED QUANTITIES OF PROVED OIL AND GAS RESERVES

Estimates of the reserves located in the United States were made by Ryder Scott
Company, H. J. Gruy and Associates, Inc., Netherland, Sewell & Associates, and
Malkewicz Hueni Associates, Inc., independent reservoir engineers. Estimated
Canadian reserves were prepared by Gilbert Laustsen Jung Associates Ltd. and
Sproule Associates Ltd. Reserve estimates are based on a complex and highly
interpretive process that is subject to continuous revision as additional
production and development-drilling information becomes available. The
quantities reported below are based on existing economic and operating
conditions at December 31. All oil and gas reserves reported were located in the
United States and Canada. The Company does not have any long-term supply
contracts with foreign governments or reserves of equity investees.



                                                         NATURAL GAS                                         OIL
                                        UNITED STATES      CANADA           TOTAL       UNITED STATES       CANADA         TOTAL
                                      ---------------------------------------------------------------------------------------------
                                                            (MMcf)                                         (MBbls)
                                                                                                         
PROVED RESERVES
Balance at January 1, 1998                 357,529          21,134         378,663          12,664           2,435         15,099
  Revisions of estimates                       378          (3,568)         (3,190)         (3,165)            238         (2,927)
  Extensions and discoveries                28,598           1,984          30,582             442             261            703
  Purchase of reserves in place            129,207           5,110         134,317           3,720              71          3,791
  Sale of reserves in place                   (440)                           (440)            (76)                           (76)
  Production                               (48,584)         (2,725)        (51,309)         (1,936)           (404)        (2,340)
                                      ---------------------------------------------------------------------------------------------
Balance at December 31, 1998               466,688          21,935         488,623          11,649           2,601         14,250
  Revisions of estimates                     4,155            (106)          4,049           4,031             372          4,403
  Extensions and discoveries                77,737           1,720          79,457             794             257          1,051
  Purchase of reserves in place             17,020                          17,020             130                            130
  Sale of reserves in place                (11,984)                        (11,984)         (3,665)                        (3,665)
  Production                               (59,839)         (2,873)        (62,712)         (1,876)           (435)        (2,311)
                                      ---------------------------------------------------------------------------------------------
Balance at December 31, 1999               493,777          20,676         514,453          11,063           2,795         13,858
  Revisions of estimates                    25,662          (7,890)         17,772             221             (64)           157
  Extensions and discoveries               123,155           2,511         125,666           1,532             208          1,740
  Purchase of reserves in place                846          52,000          52,846               1           1,520          1,521
  Sale of reserves in place                 (1,885)                         (1,885)            (17)              0            (17)
  Production                               (61,722)         (7,241)        (68,963)         (1,484)           (741)        (2,225)
                                      ---------------------------------------------------------------------------------------------
Balance at December 31, 2000               579,833          60,056         639,889          11,316           3,718         15,034
                                      =============================================================================================

PROVED-DEVELOPED RESERVES
Balance at January 1, 1998                 300,550          16,670         317,220          10,769           1,851         12,620
Balance at December 31, 1998               411,826          17,835         429,661          10,443           2,281         12,724
Balance at December 31, 1999               412,008          17,076         429,084           9,897           2,565         12,462
Balance at December 31, 2000               434,122          55,623         489,745           9,696           3,077         12,773


STANDARDIZED MEASURE OF FUTURE NET CASH FLOWS RELATING TO PROVED RESERVES
(RESTATED)

Future net cash flows were calculated at December 31 using year-end prices
and known contract-price changes. The year-end prices do not include any
impact of hedging activities. Year-end production costs, development costs
and appropriate statutory income tax rates, with consideration of future tax
rates already legislated, were used to compute the future net cash flows. All
cash flows were discounted at 10% to reflect the time value of cash flows,
without regard to the risk of specific properties.


                                       50


The assumptions used to derive the standardized measure of future net cash
flows are those required by accounting standards and do not necessarily
reflect the Company's expectations. The usefulness of the standardized
measure of future net cash flows is impaired because of the reliance on
reserve estimates and production schedules that are inherently imprecise.




YEAR ENDED DECEMBER 31,                               UNITED STATES        CANADA         TOTAL
                                                     -----------------------------------------------
                                                                       (IN THOUSANDS)
                                                                               
2000
Future cash inflows                                     $5,412,945        $568,771      $5,981,716
Future production costs                                   (955,827)        (73,583)     (1,029,410)
Future development costs                                  (107,355)         (2,900)       (110,255)
Future income tax expenses                              (1,489,267)       (182,537)     (1,671,804)
                                                     -----------------------------------------------
  Future net cash flows                                  2,860,496         309,751       3,170,247

10% annual discount to reflect
  timing of net cash flows                              (1,316,114)       (136,445)     (1,452,559)
                                                     -----------------------------------------------
Standardized measure of discounted
  future net cash flows                                 $1,544,382        $173,306      $1,717,688
                                                     ===============================================

1999
Future cash inflows                                     $1,332,761        $108,990      $1,441,751
Future production costs                                   (398,591)        (28,280)       (426,871)
Future development costs                                   (61,034)         (3,146)        (64,180)
Future income tax expenses                                (188,988)        (10,353)       (199,341)
                                                     -----------------------------------------------
  Future net cash flows                                    684,148          67,211         751,359
10% annual discount to reflect
  timing of net cash flows                                (280,911)        (23,652)       (304,563)
                                                     -----------------------------------------------
Standardized measure of discounted
  future net cash flows                                   $403,237         $43,559        $446,796
                                                     ===============================================

1998

Future cash inflows                                       $982,404         $66,885      $1,049,289
Future production costs                                   (320,355)        (22,088)       (342,443)
Future development costs                                   (45,138)           (696)        (45,834)
Future income tax expenses                                 (84,868)                        (84,868)
                                                     -----------------------------------------------
  Future net cash flows                                    532,043          44,101         576,144
10% annual discount to reflect
timing of net cash flows                                  (212,959)        (14,809)       (227,768)
                                                     -----------------------------------------------
Standardized measure of discounted
future net cash flows                                     $319,084         $29,292        $348,376
                                                     ===============================================



                                        51


The principal sources of change in the standardized measure of discounted future
net cash flows were:



                                                                    YEAR ENDED DECEMBER 31,
                                                            2000            1999            1998
                                                        -------------------------------------------
                                                                           (IN THOUSANDS)
                                                                                 
Beginning balance                                         $446,796        $348,376        $300,994
    Sales of oil and gas produced, net
      of production costs                                 (187,260)       (116,846)        (93,717)
    Net changes in prices and
      production costs                                   1,637,549         171,392         (53,613)
    Extensions and discoveries, less
      related costs                                        492,398          79,511          24,120
    Revisions of quantity estimates                         70,155          28,665         (14,399)
    Purchase of reserves in place                           32,260           2,384         129,854
    Sale of reserves in place                               (1,867)        (33,043)           (540)
    Accretion of discount                                   44,680          34,837          30,099
    Net change in income taxes                            (776,276)        (61,807)          5,632
    Change in production rate                              (50,077)         (8,859)          6,728
    Other                                                    9,330           2,186          13,218
                                                        -------------------------------------------
    Net change                                           1,270,892          98,420          47,382
                                                        -------------------------------------------
Ending balance                                          $1,717,688        $446,796        $348,376
                                                        ===========================================


COST-OF-SERVICE ACTIVITIES

The following information is provided with respect to cost-of-service oil and
gas properties managed and developed by Wexpro and regulated by the Wexpro
settlement agreement. Information on the standardized measure of future net
cash flows has not been included for cost-of-service activities because the
operations of and return on investment for such properties are regulated by
the Wexpro settlement agreement.

CAPITALIZED COSTS

Capitalized costs for cost-of-service oil and gas properties net of the
related accumulated depreciation and amortization were as follows:



                                                                        DECEMBER 31,
                                                            2000            1999            1998
                                                          ----------------------------------------
                                                                      (IN THOUSANDS)
                                                                                 
Wexpro                                                    $155,374        $137,584        $129,573
Questar Gas                                                 22,620          25,380          27,739
                                                          ----------------------------------------
                                                          $177,994        $162,964        $157,312
                                                          ========================================


COSTS INCURRED

Costs incurred by Wexpro for cost of service oil and gas producing activities
were $32,066,000 in 2000, $21,273,000 in 1999 and $26,956,000 in 1998.


                                       52


RESULTS OF OPERATIONS

Following are the results of operations of the Company's cost-of-service gas
and oil development activities before corporate overhead and interest
expenses.



                                                                     YEAR ENDED DECEMBER 31,
                                                            2000            1999            1998
                                                         -------------------------------------------
                                                                       (IN THOUSANDS)
                                                                                  
Revenues
From unaffiliated companies                                $15,179          $8,844         $10,025
From affiliates - Note A                                    73,721          62,335          58,581
                                                         -------------------------------------------
         Total revenues                                     88,900          71,179          68,606

Production expenses                                         27,861          18,548          22,439
Depreciation and amortization                               13,922          12,665          11,379
                                                         -------------------------------------------
        Total expenses                                      41,783          31,213          33,818
                                                         -------------------------------------------

Revenues less expenses                                      47,117          39,966          34,788
Income taxes                                                16,923          14,602          12,441
                                                         -------------------------------------------
        Results of operations before corporate
        overhead and interest expenses                     $30,194         $25,364         $22,347
                                                         ===========================================


Note A - Represents revenues received from Questar Gas pursuant to Wexpro
Settlement Agreement.

ESTIMATED QUANTITIES OF PROVED OIL AND GAS RESERVES

The following estimates were made by the Company's reservoir engineers. No
estimates are available for cost of service proved-undeveloped reserves that may
exist.



                                                          NATURAL GAS         OIL
                                                        ----------------------------
                                                            (MMcf)          (MBbls)
                                                                       
PROVED DEVELOPED RESERVES
Balance at January 1, 1998                                 337,179           3,049
  Revisions of estimates                                    15,017             (46)
  Extensions and discoveries                                25,077             333
  Production                                               (37,138)           (613)
                                                        ----------------------------
Balance at December 31, 1998                               340,135           2,723
  Revisions of estimates                                     5,699             976
  Extensions and discoveries                                46,739             213
  Production                                               (38,890)           (623)
                                                        ----------------------------
Balance at December 31, 1999                               353,683           3,289
  Revisions of estimates                                    16,523             504
  Extensions and discoveries                                50,351             234
  Production                                               (41,546)           (579)
                                                        ----------------------------
Balance at December 31, 2000                               379,011           3,448
                                                        =============================



                                       53


                                   SIGNATURES

         Pursuant to the requirements of Section 13 or 15(d) of the
Securities Exchange Act of 1934, the registrant has duly caused this report
to be signed on its behalf by the undersigned, thereunto duly authorized, on
the day of January 16, 2002.


                                     QUESTAR CORPORATION
                                        (Registrant)


                                     By   /s/  R. D. Cash
                                        ----------------------------------------
                                          R. D. Cash
                                          Chairman and Chief  Executive Officer


         Pursuant to the requirements of the Securities Exchange Act of 1934,
this report has been signed below by the following persons on behalf of the
registrant and in the capacities and on the date indicated.


/s/ R. D. Cash                              Chairman and Chief Executive
---------------------------                 Officer (Principal Executive
R. D. Cash                                  Officer)


/s/ S. E. Parks                             Senior Vice President, Treasurer and
---------------------------                 Chief Financial Officer (Principal
S. E. Parks                                 Financial and Accounting Officer)


*R. D. Cash                                 Director
*K. O. Rattie                               Director
*Teresa Beck                                Director
*Patrick J. Early                           Director
*W. W. Hawkins                              Director
*Robert E. Kadlec                           Director
*Dixie L. Leavitt                           Director
*Gary G. Michael                            Director
*G. L. Nordloh                              Director
*Scott S. Parker                            Director
*D. N. Rose                                 Director
*Harris H. Simmons                          Director


JANUARY 16, 2002                            *By    /s/ R. D. Cash
-----------------------                         --------------------------------
       Date                                        R. D. Cash, Attorney in Fact


                                       55