UNITED STATES
SECURITIES AND EXCHANGE COMMISSION 
WASHINGTON, D.C. 20549

Form 10-Q



|[X]   |    | QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE QUARTERLY PERIOD ENDED MARCH 31, 2003.     
|----- | -- | -------------------------------------------------------------------------------------------------------------------------------------------
|      | OR
|[   ] |    | TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE TRANSITION PERIOD FROM _______ TO _______.





|QUESTAR PIPELINE COMPANY                                                                      
|----------------------------------------------------------------------------------------------
|                                                                                              
|(Exact name of registrant as specified in its charter)                                        
|State of Utah(State or other jurisdiction of
incorporation or organization)                   
|                                                                                              
|P.O. Box 45360
180 East 100 South
Salt Lake City, Utah(Address of principal executive offices)

(801) 324-2400(Registrant's telephone number, including area code)



|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 the number of shares outstanding of each of the issuer's classes of common stock, as of the latest practicable date.
|-----------------------------------------------------------------------------------------------------------------------------



|Class                         |  | Outstanding as of  April 30, 2003
|----------------------------- |  | ---------------------------------
|                              |  |                                  
|Common Stock, $1.00 par value |  | 6,550,843 shares                 



|Registrant meets the conditions set forth in General Instruction H(a)(1) and (b) of Form 10-Q and is filing this Form 10-Q with the reduced disclosure format.
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|PART I  FINANCIAL INFORMATION                  |                |                 |           
|---------------------------------------------- | -------------- | --------------- | ----------
|Item 1.  Financial Statements                  |                |                 |           
|                                               |                |                 |           
|QUESTAR PIPELINE COMPANY AND SUBSIDIARIES      |               
|CONSOLIDATED STATEMENTS OF INCOME              |                |                
|(Unaudited)                                    |                |                 |           
|                                               |                |                 |           
|                                               |                |                 |           
|                                               | 3 Months Ended | 12 Months Ended
|                                               | March 31,      | March 31,      
|                                               | 2003           | 2002            | 2003      
|                                               |               
|                                               | (In Thousands)
|                                               |                |                 |           
|REVENUES                                       | $   38,475     | $   33,487      | $  147,863
|                                               |                |                 |           
|OPERATING EXPENSES                             |                |                 |           
|Operating and maintenance                      | 12,625         | 12,051          | 50,167    
|Depreciation                                   | 6,082          | 4,845           | 23,386    
|Other taxes                                    | 1,483          | 850             | 5,581     
|                                               |                |                 |           
|                                               |                |                 |           
|TOTAL OPERATING EXPENSES                       | 20,190         | 17,746          | 79,134    
|                                               |                |                 |           
|                                               |                |                 |           
|OPERATING INCOME                               | 18,285         | 15,741          | 68,729    
|                                               |                |                 |           
|INTEREST AND OTHER INCOME (LOSS)               | 116            | 1,081           | (450)     
|                                               |                |                 |           
|INCOME (LOSS) FROM OPERATIONS OF               |                |                 |           
|UNCONSOLIDATED AFFILIATES                      |                | 222             | 7,578     
|                                               |                |                 |           
|DEBT EXPENSE                                   | (5,712)        | (5,677)         | (24,030)  
|                                               |                |                 |           
|                                               |                |                 |           
|INCOME BEFORE INCOME TAXES                     |                |                 |           
|AND CUMULATIVE EFFECT                          | 12,689         | 11,367          | 51,827    
|                                               |                |                 |           
|INCOME TAXES                                   | 4,636          | 3,950           | 18,583    
|                                               |                |                 |           
|                                               |                |                 |           
|INCOME BEFORE CUMULATIVE EFFECT                | 8,053          | 7,417           | 33,244    
|                                               |                |                 |           
|Cumulative effect of accounting change         |                |                 |           
|for asset retirement obligations, net of       |                |                 |           
|income taxes of $78                            | (133)          |                 | (133)     
|                                               |                |                 |           
|                                               |                |                 |           
|NET INCOME                                     | $   7,920      | $   7,417       | $  33,111 
|                                               |                |                 |           
|                                               |                |                 |           
|                                               |                |                 |           
|                                               |                |                 |           
|                                               |                |                 |           
|See notes to consolidated financial statements
|                                               |                |                 |           



|QUESTAR PIPELINE COMPANY AND SUBSIDIARIES
|-----------------------------------------
|CONDENSED CONSOLIDATED BALANCE SHEETS    
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|QUESTAR PIPELINE COMPANY AND SUBSIDIARIES                       
|CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS                 
|(Unaudited)                                                     
|                                                                
|                                                                
|                                                                
|                                                                
|                                                                
|                                                                
|OPERATING ACTIVITIES                                            
|Net income                                                      
|Depreciation                                                    
|Deferred income taxes                                           
|Income from unconsolidated affiliates, net of cash distributions
|Net gain from selling assets                                    
|Cumulative effect of accounting change                          
|                                                                
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|                                                                
|Change in operating assets and liabilities                      
|                                                                
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|NET CASH PROVIDED FROM OPERATING                                
|ACTIVITIES                                                      
|                                                                
|INVESTING ACTIVITIES                                            
|Capital expenditures                                            
|Purchase of property, plant and equipment                       
|Investment in unconsolidated affiliates                         
|                                                                
|Total capital expenditures                                      
|Proceeds from (cost of) disposition of assets                   
|                                                                
|                                                                
|NET CASH USED IN INVESTING ACTIVITIES                           
|                                                                
|FINANCING ACTIVITIES                                            
|Checks outstanding in excess of cash balances                   
|Change in notes payable to Questar Corp.                        
|Payment of dividends                                            
|                                                                
|                                                                
|NET CASH PROVIDED FROM (USED IN)                                
|FINANCING ACTIVITIES                                            
|                                                                
|                                                                
|Decrease in cash and cash equivalents                           
|Beginning cash and cash equivalents                             
|                                                                
|Ending cash and cash equivalents                                
|                                                                
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|See notes to the consolidated financial statements              



|QUESTAR PIPELINE COMPANY AND SUBSIDIARIES                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             
|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|NOTES TO CONSOLIDATED FINANCIAL STATEMENTS                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            
|March 31, 2003                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        
|(Unaudited)                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           
|                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      
|Note 1 - Basis of Presentation                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        
|                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      
|The interim financial statements reflect all adjustments which are, in the opinion of management, necessary for a fair presentation of the results of operations for the interim periods presented.  All such adjustments are of a normal recurring nature. The results of operations for the three- and twelve-month periods ended March 31, 2003, are not necessarily indicative of the results that may be expected for the year ending December 31, 2003.  The straight fixed-variable rate design, which allows for recovery of all fixed costs in the demand or reservation charges, reduces the earnings impact of weather conditions on gas transportation and storage operations. For further information refer to the financial statements and footnotes thereto included in the Company's annual report on Form 10-K for the year ended December 31, 2002.                                                                                                 
|                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      
|Note 2 - New Accounting Standard                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      
|                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      
|On January 1, 2003, Questar Pipeline adopted Statement of Financial Accounting Standards 143 (SFAS 143) "Accounting for Asset Retirement Obligations." As a result, the Company recorded a $133,000 after tax charge for the cumulative effect of this accounting change and a $238,000 long-term asset retirement obligation (liability).  SFAS 143 addresses the financial accounting and reporting of the fair value of legal obligations associated with the retirement of tangible long-lived assets. The new standard requires the Company to estimate a fair value of abandonment costs and to capitalize and depreciate those costs over the life of the related assets. The provisions of SFAS 143 did not apply to a majority of the Company's long-lived assets due to lack of a legal obligation to abandon the assets or to an indefinite abandonment date. The new accounting rules allow deferral of an obligation until the abandonment date is known.
|                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      
|The asset retirement obligation is adjusted to its present value each period through an accretion process using a credit-adjusted risk-free interest rate.    Both the accretion expense associated with the liability and the depreciation associated with the capitalized abandonment costs are non-cash expenses until the asset is retired.  Ongoing accretion and depreciation expenses associated with SFAS 143 are insignificant.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              
|                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      
|Note 3 - Reclassifications                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            
|                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      
|Certain reclassifications were made to the 2002 financial statements to conform with the 2003 presentation.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           
|                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      





|Item 2.  Management's Discussion and Analysis of Financial Condition and Results of Operations                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 
|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|QUESTAR PIPELINE COMPANY AND SUBSIDIARIES                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      
|March 31, 2003
(Unaudited)                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     
|Operating Results                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              
|                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               
|Following is a summary of financial and operating information for the Company:                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 
|                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               
|Questar Pipeline and its subsidiaries conduct interstate natural gas transmission, storage, processing and gathering operations.  Following is a summary of financial results and operating information.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       
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|FINANCIAL RESULTS - (In Thousands)                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             
|Revenues                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       
|From unaffiliated customers                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    
|From affiliates                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                
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|Total revenues                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 
|                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               
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|Operating income                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               
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|Income before cumulative effect                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                
|Cumulative effect of accounting change                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         
|                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               
|Net Income                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     
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|OPERATING STATISTICS                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           
|Natural gas transportation volumes (in MDth)                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   
|For unaffiliated customers                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     
|For Questar Gas                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                
|For other affiliated customers                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 
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|Total transportation                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           
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|Transportation revenue (per Dth)                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               
|                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               
|Revenues                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       
|                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               
|Revenues were higher in the 3- and 12-month periods of 2003 compared with the 2002 periods, primarily due to increased demand charges for gas transportation services.  Questar Pipeline's total transportation volumes grew 4% in the first quarter and 10% in the trailing 12 months.  The Company's eastern zone of the Questar Southern Trails Pipeline commenced operations mid-year 2002 and the pipeline's 80,000 Dth daily capacity is fully subscribed.  Total firm daily demand was 1,519,000 Dth in the first quarter of 2003 compared with 1,410,000 Dth in the first quarter of 2002.  Revenues for the 12 months ended March 31, 2003, increased 16% primarily as a result of increased demand charges for transportation, implementation of a park-and-loan storage service started in 2002, and an increase in gas-gathering revenue related to the startup of a new non-jurisdiction pipeline.



|Expenses                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           
|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   
|Operating and maintenance expenses increased 5% and other taxes (primarily property taxes) increased 74% in the first quarter of 2003 over the 2002 quarter as a result of the start-up of the eastern zone of Questar Southern Trails Pipeline and the consolidation of the operations of Overthrust Pipeline.  Higher pension and other long-term employee-benefit costs in the 2003 periods were offset by lower legal fees. Questar Pipeline benefited from lower legal expenses due to the settlement of TransColorado Pipeline litigation in October 2002. Depreciation expense was higher in the 2003 periods compared with the 2002 periods as a result of capital investments and initiating service in new pipelines.                                                                                                                                                                                                                                                                                                                                                                                                    
|                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   
|Other income, debt expense and income taxes                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        
|                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   
|Interest and other income was lower in the 2003 periods due to less capitalization of financing costs (AFUDC) following the commencement of service on the eastern segment of Questar Southern Trails Pipeline.  A $3 million charge to reduce an asset to net realizable value is included in the 12 months ended March 31, 2003. Earnings from unconsolidated affiliates included Questar Pipeline's shares, through affiliates, of TransColorado Pipeline and Overthrust Pipeline prior to the first quarter of 2003.  In the fourth quarter of 2002, TransColorado was sold and Overthrust Pipeline became a wholly owned subsidiary. Debt expense was higher in the 2003 periods as a result of less capitalization of AFUDC.  The effective income tax rate was 36.5% and 34.7% in the first quarters of 2003 and 2002, respectively.                                                                                                                                                                                                                                                                                        
|                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   
|Cumulative effect for change in accounting method                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  
|                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   
|On January 1, 2003, the Company adopted a new accounting rule, SFAS 143,  "Accounting for Asset Retirement Obligations and recorded a cumulative effect that reduced net income by $133,000.  Ongoing accretion and depreciation expenses associated with SFAS 143 are insignificant.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              
|                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   
|Liquidity and Capital Resources                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    
|                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   
|Operating activities                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               
|                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   
|Net cash provided from operating activities of $26.2 million in the first quarter of 2003 was $17.2 million more than the amount reported for the same period of 2002 due to higher net income and timing differences, primarily accounts payable and accrued expenses.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            
|                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   
|Investing activities                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               
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|Capital expenditures were $3.5 million in the first quarter of 2003, which was $23.4 million less than was reported in the first quarter of 2002 because of the 2002 completion of pipeline projects. The forecast for 2003 is $47.8 million.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      
|                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   
|Financing activities                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               
|                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   
|Net cash flow provided from operating activities was used to fund first quarter capital expenditures, pay a cash dividend and repay $13.8 million of debt. Forecasted capital expenditures for 2003 are expected to be financed  with the proceeds from net cash provided from operating activities and debt from Questar.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         
|                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   
|Western zone of Questar Southern Trails Pipeline                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   
|                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   
|The western zone that runs from the California-Arizona border to Long Beach, California is idle.  Questar Pipeline is actively seeking customers willing to enter into long-term gas transportation contracts necessary to place the pipeline into service.  The Company is also considering selling this pipeline, and has received non-binding indications of interest from several interested parties.  Questar Pipeline's investment in the western zone is approximately $52 million.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         
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|Forward-Looking Statements                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         
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|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;                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            
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|Changes in rate-regulatory policies;                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               
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|Rate of inflation and interest rates;                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              
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|Assumptions used in business combinations;                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         
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|Weather and other natural phenomena;                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               
|                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   
|The effect of environmental regulation;                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            
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|Changes in customers' credit ratings, including energy merchants;                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  
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|Competition from other forms of energy, other pipelines and storage facilities;                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    
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|The effect of accounting policies issued periodically by accounting standard-setting bodies;                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       
|                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   
|Adverse repercussion from terrorist attacks or acts of war;                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        
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|Adverse changes in the business or financial condition of the Company; and                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         
|                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   
|Lower credit ratings.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              
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|Item 4. Controls and Procedures                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    
|(a) Evaluation of Disclosure Controls and Procedures.  The Company's Chief Executive Officer and Chief Financial Officer have evaluated the effectiveness of the Company's disclosure controls and procedures (as such term is defined in Rules 13a-14(c) and 15d-14(c) under the Securities Exchange Act of 1934, as amended (the "Exchange Act")) as of a date within 90 days prior to the filing date of this quarterly report (the "Evaluation Date").  Based on such evaluation, such officers have concluded that, as of the Evaluation Date, the Company's disclosure controls and procedures are effective in alerting them on a timely basis to material information relating to the Company, including consolidated subsidiaries, required to be included in the Company's reports filed or submitted under the Exchange Act.

(b)  Changes in Internal Controls.  Since the Evaluation Date, there have not been any significant changes in the Company's internal controls or in other factors that could significantly affect such controls.                                                                          



|Part II 
OTHER INFORMATION
|--------------------------



|Item 5.  Other Information.
          D. N. Rose, age 58, resigned as a director of Questar Pipeline Company ("Questar Pipeline" or the "Company") effective May 1, 2003, concurrently with his retirement as an employee and resignation as the Company's President and Chief Executive Officer.  Mr. Rose had served as a director of Questar Pipeline since May of 1996 and as its President and Chief Executive Officer since March of 1997.
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|As previously announced, Alan K. Allred, age 52, was appointed to succeed Mr. Rose as the Company's President and Chief Executive Officer.  During his 25 years of service with Questar Pipeline and its affiliates, Mr. Allred has served in a number of key leadership roles including Manager of Regulatory Affairs (October 1997 to November 2000), Vice President, Business Development (November 2000 to March 2002), Senior Vice President (March 2002 to November 2002,) and Executive Vice President and Chief Operating Officer (November 2002 to May 2003).  He will also be elected to serve as a director of the Company at its annual meeting scheduled for May 20, 2003.
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|Item 6.  Exhibits and Reports on Form 8-K.
          a.  The following exhibits are filed as part of this report.
|-----------------------------------------------------------------------------------------------------------------



|Exhibit No. | Exhibit                                      
|----------- | ---------------------------------------------
|            |                                              
|99.1.       | Certification of A. K. Allred and S. E. Parks



|b.  Questar Pipeline did not file any Current Reports on Form 8-K during the quarter.
|-------------------------------------------------------------------------------------





|SIGNATURES
|----------



|Pursuant to the requirements 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.
|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



|             |  | QUESTAR PIPELINE COMPANY
   (Registrant)                           
|------------ |  | -------------------------------------------------------------------
|             |  |                                                                    
|May 14, 2003 |  | /s/A. K. Allred                                                    
|             |  |                                                                    
|             |  | A. K. Allred
President and Chief Executive Officer                 
|             |  |                                                                    
|             |  |                                                                    
|May 14, 2003 |  | /s/S. E. Parks                                                     
|             |  |                                                                    
|             |  | S. E. Parks
Vice President, Treasurer, and 
Chief Financial Officer
|             |  |                                                                    







|CERTIFICATION
|-------------



|I, A. K. Allred, certify that:
|------------------------------



|1. | I have reviewed this quarterly report on Form 10-Q of Questar Pipeline Company;
|-- | -------------------------------------------------------------------------------



|2. | Based on my knowledge, this quarterly report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this quarterly report;
|-- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



|3. | Based on my knowledge, the financial statements, and other financial information included in this quarterly report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this quarterly report;
|-- | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



|4. | The registrant's other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-14 and 15d-14) for the registrant and we have:
|-- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



|a) | designed such disclosure controls and procedures to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this quarterly report is being prepared;
|-- | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



|b) | evaluated the effectiveness of the registrant's disclosure controls and procedures as of a date within 90 days prior to the filing date of this quarterly report (the "Evaluation Date"); and
|-- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



|c) | presented in this quarterly report our conclusions about the effectiveness of the disclosure controls and procedures based on our evaluation as of the Evaluation Date;
|-- | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------



|5. | The registrant's other certifying officer and I have disclosed, based on our most recent evaluation, to the registrant's auditors and the audit committee of registrant's board of directors (or persons performing the equivalent function):
|-- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



|a) | all significant deficiencies in the design or operation of internal controls that could adversely affect the registrant's ability to record, process, summarize and report financial data and have identified for the registrant's auditors any material weaknesses in internal controls; and
|-- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



|b) | any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal controls;
|-- | --------------------------------------------------------------------------------------------------------------------------------------------------





|6. | The registrant's other certifying officer and I have indicated in this quarterly report whether or not there were significant changes in internal controls or in other factors that could significantly affect internal controls subsequent to the date of our most recent evaluation, including any corrective actions with regard to significant deficiencies and material weaknesses.
|-- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



|             |  |                     
|------------ |  | --------------------
|May 14, 2003 |  | By:  /s/A. K. Allred
|             |  |                     
|Date         |  |                     
|             |  |                     









|CERTIFICATION
|-------------



|I, S. E. Parks, certify that:
|-----------------------------



|1. | I have reviewed this quarterly report on Form 10-Q of Questar Pipeline Company;
|-- | -------------------------------------------------------------------------------



|2. | Based on my knowledge, this quarterly report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this quarterly report;
|-- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



|3. | Based on my knowledge, the financial statements, and other financial information included in this quarterly report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this quarterly report;
|-- | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



|4. | The registrant's other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-14 and 15d-14) for the registrant and we have:
|-- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



|a) | designed such disclosure controls and procedures to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this quarterly report is being prepared;
|-- | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



|b) | evaluated the effectiveness of the registrant's disclosure controls and procedures as of a date within 90 days prior to the filing date of this quarterly report (the "Evaluation Date"); and
|-- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



|c) | presented in this quarterly report our conclusions about the effectiveness of the disclosure controls and procedures based on our evaluation as of the Evaluation Date;
|-- | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------



|5. | The registrant's other certifying officer and I have disclosed, based on our most recent evaluation, to the registrant's auditors and the audit committee of registrant's board of directors (or persons performing the equivalent function):
|-- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



|a) | all significant deficiencies in the design or operation of internal controls that could adversely affect the registrant's ability to record, process, summarize and report financial data and have identified for the registrant's auditors any material weaknesses in internal controls; and
|-- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



|b) | any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal controls;
|-- | --------------------------------------------------------------------------------------------------------------------------------------------------





|6. | The registrant's other certifying officer and I have indicated in this quarterly report whether or not there were significant changes in internal controls or in other factors that could significantly affect internal controls subsequent to the date of our most recent evaluation, including any corrective actions with regard to significant deficiencies and material weaknesses.
|-- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



|             |  |                    
|------------ |  | -------------------
|May 14, 2003 |  | By:  /s/S. E. Parks
|             |  |                    
|Date         |  |                    
|             |  |                    









|List of Exhibits:
|-----------------





|Exhibit No. | Exhibit                                      
|----------- | ---------------------------------------------
|            |                                              
|99.1.       | Certification of A. K. Allred and S. E. Parks







|Exhibit 99.1                                                                                                          
|----------------------------------------------------------------------------------------------------------------------
|CERTIFICATION PURSUANT TO
18 U.S.C. SECTION 1350,
AS ADOPTED PURSUANT TO
SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002



|In connection with the Quarterly Report of Questar Pipeline Company (the "Company") on Form 10-Q for the period ending March 31, 2003, as filed with the Securities and Exchange Commission on the date hereof (the "Report"), A. K. Allred, President and Chief Executive Officer of the Company, and S. E. Parks, Vice President, Treasurer and Chief Financial Officer of the Company, each hereby certifies, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that, to the best of his knowledge:
|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|(1)  The Report fully complies with the requirements of Section 13(a) or Section 15(d) of the Securities Exchange Act of 1934; and
                    (2)  The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.                                                                                                                                                                                                                                              
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|May 14, 2003                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  
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|May 14, 2003                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  
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|                                                                                                                                                                                                                                                                                                  
|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|A signed original of this written statement required by Section 906 has been provided to the Company and will be retained by the Company and furnished to the Securities and Exchange Commission or its staff upon request.                                                                       
|This certification accompanies the Report pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 and shall not, except to the extent required by the Sarbanes-Oxley Act of 2002, be deemed filed by the Company for purposes of  Section 18 of the Securities Exchange Act of 1934, as amended.
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