QUESTAR CORPORATION
                 SUPPLEMENTAL EXECUTIVE RETIREMENT PLAN
           (As amended and restated effective August 1, 1995)

 1.   PURPOSE

      The Supplemental Executive Retirement Plan is intended to enable 
Questar Corporation and its participating affiliates to attract and 
retain key management personnel by providing them with monthly 
supplemental retirement benefits to compensate them for the limitations 
imposed by federal tax laws on benefits payable from the Questar 
Corporation Retirement Plan.  It is also intended to pay monthly 
supplemental retirement benefits to certain officers based on years of 
service that cannot be taken into account under the Questar Corporation 
Retirement Plan.

 2.   DEFINITIONS

      The following terms, when used herein, shall have the meanings set 
forth below, unless a different meaning is plainly required by the 
context:

      "Board" means the Board of Directors of Questar Corporation or a 
successor company.

      "Code" means the Internal Revenue Code of 1986, as it may be 
amended from time to time.

      "Committee" means the Management Performance Committee of the 
Company's Board.

      "Company" means Questar Corporation or any other organization 
controlling Questar Corporation or any successor organization.

      "Compensation" means an Officer's salary or wages, including 
payments under incentive compensation plans paid by the Employer and 
includable in taxable income during the applicable Plan Year, but 
exclusive of any other forms of additional Compensation such as the 
Employer's cost for any public or private employee benefit plan or any 
income recognized by the Officer as a result of exercising stock 
options.  An Officer's Compensation for any Plan Year shall include any 
Elective Deferrals of the Officer under Questar Corporation's Employee 
Investment Plan or other tax-qualified plan, and any Compensation 
deferred under the Questar Corporation Deferred Compensation Plan and 
the Questar Corporation Deferred Share Plan.  An Officer's Compensation 
also shall include the amount of any reduction in Compensation for a 
Plan Year agreed upon under one or more Compensation reduction 
agreements entered into pursuant to the Questar Corporation Cafeteria 
Plan.

      "EIRP" means the Company's Executive Incentive Retirement Plan, as 
amended or restated from time to time.

      "Officer" means any officer of the Company and/or its affiliates 
who has a vested right to receive benefits under the Company's 
Retirement Plan and who has been nominated to receive supplemental 
retirement benefits under the EIRP.  

      "Participating Corporation" means any company that is affiliated 
with the Company and whose employees are covered by the Company's 
Retirement Plan or that is affiliated with the Company and receives an 
allocation of any employee benefit costs.

      "Plan" means the plan set forth in and created by this document.

      "Retired Officer" refers to an Officer who has satisfied the 
eligibility requirements set forth in Section 4 of this Plan and who is 
eligible to receive or who is receiving Supplemental Retirement Benefits 
pursuant to the terms of this Plan.

      "Retirement Plan" means the Company's Retirement Plan, as amended 
or restated from time to time, or any successor plan.  If not otherwise 
defined, capitalized words or terms used in the Plan shall have the same 
definitions used in the Retirement Plan.

      "Special Situation Officer" means any officer or former officer of 
the Company and/or its affiliates who was expressly promised upon his 
reemployment prior to January 1, 1976, that his years of service prior 
to a break in service would be restored to him for purposes of 
calculating his retirement benefits.

      "Special Supplemental Retirement Benefits" means benefits payable 
to Special Situation Officers under the terms of the Plan calculated as 
set forth in Section 6 or Section 7.

      "Supplemental Retirement Benefits" means retirement benefits 
payable to Retired Officers under the terms of the Plan calculated as 
set forth in Section 5 or Section 7.

 3.   EFFECTIVE DATE

      The Plan is effective January 1, 1987.

 4.   PARTICIPATION IN THE PLAN AND ELIGIBILITY FOR BENEFITS

      Participation in the Plan shall be limited to Officers of the 
Company and Participating Corporations.  To become eligible for 
Supplemental Retirement Benefits and Special Supplemental Retirement 
Benefits under the Plan, an Officer must have a vested right to receive 
benefits under the Retirement Plan.  A Retired Officer cannot receive 
benefits under both the Plan and the Company's Equalization Benefit 
Plan.  A Retired Officer cannot receive benefits under the Plan during 
any period that his monthly benefits from the Retirement Plan are 
suspended.  


 5.   SUPPLEMENTAL RETIREMENT BENEFITS

      An Officer who satisfies the eligibility requirements described 
above shall be eligible to receive Supplemental Retirement Benefits 
under the Plan.  The first payment of Supplemental Retirement Benefits 
will be due on the first day of the month following retirement, and 
payments will continue on the first day of each month thereafter so long 
as the Retired Officer is alive or so long as his surviving spouse is 
entitled to receive monthly benefits under the Retirement Plan.  (The 
Retired Officer's surviving spouse must have been married to the Officer 
at date of such Officer's retirement.)

      The monthly Supplemental Retirement Benefit shall equal the 
monthly benefit that would have been payable to or on behalf of a 
Retired Officer under the Retirement Plan if the limitation on annual 
benefits imposed by Section 415 of the Code and if the limitation on 
annual compensation as defined in Section 401(a)(17) of the Code were 
not applicable, and if the Retired Officer had not voluntarily chosen to 
defer any compensation under the terms of the Questar Corporation 
Deferred Share Plan or the Questar Corporation Deferred Compensation 
Plan, less the monthly benefits payable from the Retirement Plan and the 
EIRP.  The monthly Supplemental Retirement Benefit of a Special 
Situation Officer shall be calculated using the years of service 
credited to him for purposes of calculating the Special Supplemental 
Retirement Benefits as provided in Section 6.

      Except as provided in Section 7, the monthly Supplemental 
Retirement Benefit payable to or on behalf of the Retired Officer as 
determined herein shall be paid in the same form as such Retired 
Officer's benefits are payable under the Retirement Plan.  Any monthly 
Supplemental Retirement Benefits payable to the Retired Officer's 
surviving spouse shall be reduced by the monthly benefits payable to 
such surviving spouse under the Retirement Plan and the EIRP.

 6.   SPECIAL SUPPLEMENTAL RETIREMENT BENEFITS.

      A Special Situation Officer shall be eligible to receive Special 
Supplemental Retirement Benefits under the Plan.

      The Special Supplemental Retirement Benefit is designed to provide 
a Special Situation Officer with a supplemental retirement benefit that 
is equal to the difference between the monthly Retirement Plan benefit 
that he would have received if his years of service prior to his break 
in service could be credited to him for purposes of calculating his 
benefit under the Retirement Plan and the monthly Retirement Plan 
benefit that he is entitled to receive because he cannot be given credit 
for such years of service under the Retirement Plan.

      The first payment of Special Supplemental Retirement Benefits will 
be due on the first day of the month following retirement and payments 
will continue on the first day of each month thereafter so long as the 
Special Situation Officer is alive or so long as his surviving spouse is 
entitled to receive monthly benefits under the Retirement Plan.  (The 
surviving spouse must have been married to the Special Situation Officer 
at date of such Officer's retirement.)

      The monthly benefit payable under this Section is not offset by 
any monthly benefit payable under the EIRP.  Except as provided in 
Section 7, the monthly benefit payable to the Special Situation Officer 
upon his retirement shall be paid in the same form as his benefits under 
the Retirement Plan.

7.    LUMP SUM ELECTION.

      An Officer has a one-time election to receive the present value of 
his Supplemental Retirement Benefit and Special Supplemental Retirement 
Benefit (if applicable) in a lump sum.  The Officer shall make this 
election at least one year prior to retirement.  The present value shall 
be calculated using a standard mortality table referred to as the "83 
Group Annuity Mortality Table" and 80 percent of the six-month average 
rate for 30-year Treasury bond (with the six-month period ending as of 
the date of the Officer's retirement).  When making this election, the 
Officer shall also indicate when the lump-sum payment shall be made and 
if it is to be made in more than one installment.  The full amount of 
any lump-sum payment, together with credited interest, must be paid 
within five years of the Officer's retirement.  Any deferred payouts of 
lump-sum payments shall be credited with interest calculated at a 
monthly rate using the appropriate 30-year Treasury bond quoted in the 
Wall Street Journal on the first business day of each month.  (The 
appropriate 30-year Treasury bond shall be the bond that has one closest 
to maturity date (by month) preceding the date on which the interest is 
to be credited.)  Any lump-sum payments that are not deferred shall be 
paid on the first business day of the month following the Officer's 
retirement date or as soon thereafter as is administratively 
practicable.  The Officer's spouse must consent to the Officer's 
election to receive a lump-sum payment.  Such consent must be in writing 
and must acknowledge the effect of such election. 

      If the Officer fails to make an election at least one year prior 
to retirement, the Officer shall receive monthly benefits.

 8.   FUNDING

      The Supplemental Retirement Benefits and Special Supplemental 
Retirement Benefits payable under the Plan shall be paid by the Company 
and Participating Corporations out of general assets.  In its 
discretion, the Board may establish a trust fund or make other 
arrangements to assure payment of the Supplemental Retirement Benefits 
and Special Supplemental Retirement Benefits. 

 9.   ALLOCATION OF COSTS

      The cost of Supplemental Retirement Benefits and Special 
Supplemental Retirement Benefits paid to or on behalf of Retired 
Officers shall be allocated to and be the responsibility of the Company 
and Participating Corporations.

10.   ADMINISTRATION

      The Committee shall administer the Plan and may appoint an officer 
of the Company to assist the Committee with this responsibility.  The 
Committee shall have the sole responsibility to interpret the Plan and 
to adopt such rules and regulations for carrying out the Plan as it may 
deem necessary.  Decisions of the Committee shall be final and binding.

11.   AMENDMENT OR TERMINATION

      The Board may at any time amend, modify, or terminate this Plan; 
provided, however, that any Retired Officers or their surviving spouses 
receiving Supplemental Retirement Benefits and Special Supplemental 
Retirement Benefits under the Plan at the date of amendment or 
termination shall continue receiving such benefits as if such amendment 
or termination had not occurred.

12.   SUCCESSOR TO THE COMPANY

      The Company shall require any successor or assign, whether direct 
or indirect, by purchase, merger, consolidation or otherwise, to all or 
substantially all of the business and/or assets of the Company, to 
assume and agree to pay any Supplemental Retirement Benefits and Special 
Supplemental Retirement Benefits in the same manner and to the same 
extent that the Company would be required to perform if no such 
succession or assignment had taken place.

13.   CHANGE IN CONTROL AND LEGAL FEES

      The Company shall pay all legal fees and expenses that a Retired 
Officer or an Officer may incur as a result of the Company's contesting 
the validity or enforceability of such person's right to receive 
benefits under the terms of this Plan following a "Change in Control" of 
the Company.  For purposes of this Plan, a Change in Control of the 
Company shall be deemed to have occurred if any "acquiring person" is or 
becomes the beneficial owner (as defined in Rule 13d-3 under the 
Securities Exchange Act of 1934), directly or indirectly, of 20 percent 
or more of the Company's outstanding shares of common stock; provided, 
however, that the term "acquiring person" shall not include the Company, 
any subsidiary of the Company, any employee benefit plan established by 
the Company, or trustee for such plan.  A "Change in Control" shall also 
include any act or event that, with the passage of time, would result in 
a Distribution Date, within the meaning of the Rights Agreement dated as 
of March 14, 1986, and as amended on May 16, 1989, between the Company 
and First Chicago Trust Company of New York.