<PAGE>
                                                                    EXHIBIT 4.02

[Unless this certificate is presented by an authorized representative of The
Depository Trust Company, to the issuer or its agent for registration of
transfer, exchange or payment, and any certificate issued is registered in the
name of Cede & Co. or such other name as is requested by an authorized
representative of The Depository Trust Company (and any payment is made to
Cede & Co. or to such other entity as is requested by an authorized
representative of The Depository Trust Company, ANY TRANSFER, PLEDGE OR OTHER
USE HEREOF FOR VALUE OR OTHERWISE BY OR TO ANY PERSON IS WRONGFUL since the
registered owner hereof, Cede & Co., has an interest herein.]

[THIS SECURITY IS A GLOBAL SECURITY AS REFERRED TO IN THE INDENTURE HEREINAFTER
REFERENCED. UNLESS AND UNTIL IT IS EXCHANGED IN WHOLE OR IN PART FOR THE
INDIVIDUAL SECURITIES REPRESENTED HEREBY, THIS GLOBAL SECURITY MAY NOT BE
TRANSFERRED EXCEPT AS A WHOLE BY THE DEPOSITARY TO A NOMINEE OF THE DEPOSITARY
OR BY A NOMINEE OF THE DEPOSITARY TO THE DEPOSITARY OR ANOTHER NOMINEE OF THE
DEPOSITARY OR BY THE DEPOSITARY OR ANY SUCH NOMINEE TO A SUCCESSOR DEPOSITARY OR
A NOMINEE OF SUCH SUCCESSOR DEPOSITARY.]

                         QUESTAR MARKET RESOURCES, INC.


                                  % Notes Due 2011


No.                                                                   $


    QUESTAR MARKET RESOURCES, INC., a corporation duly organized and existing
under the laws of Utah (herein called the "Company," which term includes any
successor corporation under the Indenture hereinafter referred to), for value
received, hereby promises to pay to or duly provide for             , or
registered assigns, the principal sum of             on       , 2011 and to pay
interest thereon from       , 2001 or from the most recent Interest Payment Date
to which interest has been paid or duly provided for, semi-annually on May 1 and
November 1 in each year, commencing       , 2001, at the rate of   % per annum,
until the principal hereof is paid or made available for payment, and (to the
extent that the payment of such interest shall be legally enforceable) at the
rate of   % per annum on any overdue principal and premium and on any overdue
installment of interest. The interest so payable, and punctually paid or duly
provided for, on any Interest Payment Date will, as provided in the Indenture,
dated as of       , 2001 (herein called the "Indenture"), between the Company
and Bank One, NA, as Trustee (herein called the "Trustee"), be paid to the
Person in whose name this Security (or one or more Predecessor Securities) is
registered at the close of business on the Regular Record Date for such
interest, which shall be the April 15 or October 15 (whether or not a Business
Day), as the case may be, next preceding such Interest Payment Date. Any such
interest not so punctually paid or duly provided for will forthwith cease to be
payable to the Holder on such Regular Record Date and may either be paid to the
Person in whose name this Security (or one or more Predecessor Securities) is
registered at the close of business on a Special Record Date for the payment of
such Defaulted Interest to be fixed by the Trustee, notice whereof shall be
given to Holders of Securities of this series not less than 10 days prior to
such Special Record Date, or be paid at any time in any other lawful manner not
inconsistent with the requirements of any securities exchange on which the
Securities of this series may be listed, and upon such notice as may be required
by such exchange, all as more fully provided in said Indenture.


    Payment of the principal of (and premium, if any) and interest on this
Security will be made at the office or agency of the Company in the city of
Chicago, Illinois or The City of New York maintained
<PAGE>
for such purpose, and at any other office or agency maintained by the Company
for such purpose, in such coin or currency of the United States of America as at
the time of payment is legal tender for payment of public and private debts;
PROVIDED, HOWEVER, that at the option of the Company payment of interest may be
made by check mailed to the address of the Person entitled thereto as such
address shall appear in the Security Register.

    This Security is one of a duly authorized issue of securities of the Company
(herein called the "Securities"), issued and to be issued in one or more series
under the Indenture, to which Indenture and all indentures supplemental thereto
reference is hereby made for a statement of the respective rights, limitations
of rights, duties and immunities thereunder of the Company, the Trustee and the
Holders of the Securities and of the terms upon which the Securities are, and
are to be, authenticated and delivered. This Security is one of the series
designated above, limited in aggregate principal amount to $150,000,000.

    The Securities of this series are subject to redemption upon not less than
30 days' notice by mail, at any time, as a whole or in part, at the election of
the Company, at a Redemption Price equal to the principal amount plus the Make
Whole Amount, together with accrued interest to the Redemption Date, but
interest installments whose Stated Maturity is on or prior to such Redemption
Date will be payable to the Holders of such Securities, or one or more
Predecessor Securities, of record at the close of business on the relevant
Record Dates referred to above, all as provided in the Indenture. As used herein
the following terms will have the definitions given below:

    "Make-Whole Amount" for any Security means an amount equal to the excess, if
any, of (a) the present value of the remaining principal and interest payments
on such Security through the Stated Maturity thereof, computed using a discount
rate equal to the Treasury Rate plus             basis points, over (b) the
outstanding principal amount of such Security.

    "Treasury Rate" means, at any date of determination, the yield to maturity
as of such date (as compiled by and published in the most recent Federal Reserve
Statistical Release H.15 (519), which has become publicly available at least two
business days prior to the date of the redemption notice for which such
computation is being made, or if such Statistical Release is no longer
published, as reported in any publicly available source of similar market data)
of United States Treasury securities with a constant maturity most nearly equal
to the Make-Whole Average Life; PROVIDED, HOWEVER, that if the Make-Whole
Average Life is not equal to the constant maturity of the United States Treasury
security for which a weekly average yield is given, the Treasury Rate shall be
obtained by linear interpolation (calculated to the nearest one-twelfth of a
year) from the weekly average yields of United States Treasury securities for
which such yields are given, except that if the Make-Whole Average Life is less
than one year, the weekly average yield on actually traded United States
Treasury securities adjusted to a constant maturity of one year shall be used.

    "Make Whole Average Life" means, with respect to any date of redemption for
any Security, the number of years (calculated to the nearest one-twelfth) from
such redemption date to the Stated Maturity of such Security.

    In the event of redemption of this Security in part only, a new Security or
Securities of this series and of like tenor for the unredeemed portion hereof
will be issued in the name of the Holder hereof upon the cancellation hereof.

    If an Event of Default with respect to Securities of this series shall occur
and be continuing, the principal of the Securities of this series may be
declared due and payable in the manner and with the effect provided in the
Indenture.

    The Indenture permits, with certain exceptions as therein provided, the
amendment thereof and the modification of the rights and obligations of the
Company and the rights of the Holders of the Securities of each series to be
affected under the Indenture at any time by the Company and the

                                       2
<PAGE>
Trustee with the consent of the Holders of 66 2/3% in principal amount of the
Securities at the time Outstanding of each series to be affected. The Indenture
also contains provisions permitting the Holders of specified percentages in
aggregate principal amount of the Securities of each series at the time
Outstanding, on behalf of the Holders of all Securities of such series, to waive
compliance by the Company with certain provisions of the Indenture and certain
past defaults under the Indenture and their consequences. Any such consent or
waiver by the Holder of this Security shall be conclusive and binding upon such
Holder and upon all future Holders of this Security and of any Security issued
upon the registration of transfer hereof or in exchange here for or in lieu
hereof, whether or not notation of such consent or waiver is made upon this
Security.

    No reference herein to the Indenture and no provision of this Security or of
the Indenture shall alter or impair the obligation of the Company, which is
absolute and unconditional, to pay the principal of (and premium, if any) and
interest on this Security at the times, place and rate, and in the coin or
currency, herein prescribed.

    As provided in the Indenture and subject to certain limitations therein set
forth, the transfer of this Security is registerable in the Security Register,
upon surrender of this Security for registration of transfer at the office or
agency of the Company in any place where the principal of (and premium, if any)
and interest on this Security are payable, duly endorsed by, or accompanied by a
written instrument of transfer in form satisfactory to the Company and the
Security Registrar duly executed by, the Holder hereof or his attorney duly
authorized in writing, and thereupon one or more new Securities of this series
and of like tenor, of authorized denominations and for the same aggregate
principal amount, will be issued to the designated transferee or transferees.

    The Securities of this series are issuable only in registered form without
coupons in denominations of $1,000 and any integral multiple thereof. As
provided in the Indenture and subject to certain limitations therein set forth,
Securities of this series are exchangeable for a like aggregate principal amount
of Securities of this series and of like tenor of a different authorized
denomination, as requested by the Holder surrendering the same.

    No service charge shall be made for any such registration of transfer or
exchange, but the Company may require payment of a sum sufficient to cover any
tax or other governmental charge payable in connection therewith.

    Prior to due presentment of this Security for registration of transfer, the
Company, the Trustee and any agent of the Company or the Trustee may treat the
Person in whose name this Security is registered as the owner hereof for all
purposes, whether or not this Security be overdue, and neither the Company, the
Trustee nor any such agent shall be affected by notice to the contrary.

    All terms used in this Security which are defined in the Indenture shall
have the meanings assigned to them in the Indenture.

    Unless the certificate of authentication hereon has been executed by the
Trustee by manual signature, this Security shall not be entitled to any benefit
under the Indenture or be valid or obligatory for any purpose.

                                       3
<PAGE>
    IN WITNESS WHEREOF, the Company has caused this instrument to be duly
executed under its corporate seal.

Dated:

<TABLE>
<S>                                                    <C>  <C>
                                                       QUESTAR MARKET RESOURCES, INC.

                                                       By
                                                            -----------------------------------------

Attest:
--------------------------------------
</TABLE>

                    TRUSTEE'S CERTIFICATE OF AUTHENTICATION

    This is one of the Securities of the series designated therein referred to
in the within-mentioned Indenture.


<TABLE>
<S>                                                    <C>  <C>
                                                       BANK ONE, NA
                                                       as Trustee

                                                       By
                                                            -----------------------------------------
                                                                       Authorized Signature
</TABLE>


                                       4