Exhibit 10.5

FIRST AMENDMENT TO

QUESTAR CORPORATION

LONG-TERM STOCK INCENTIVE PLAN

THIS FIRST AMENDMENT TO QUESTAR CORPORATION LONG-TERM STOCK INCENTIVE PLAN (this
“First Amendment”), made as of June 12, 2010, is made and adopted by Questar
Corporation, a Utah corporation (the “Company”).  Capitalized terms used but not
otherwise defined herein shall have the respective meanings ascribed to them in
the Plan (as defined below).

WHEREAS, the Company maintains the Questar Corporation Long-Term Stock Incentive
Plan, as amended and restated effective May 18, 2010 (the “Plan”);

WHEREAS, pursuant to Section 13(h) of the Plan, the Plan may be amended from
time to time by the Company’s Board of Directors; and

WHEREAS, the Company desires to amend the Plan as set forth herein.

NOW, THEREFORE BE IT RESOLVED, that the Plan be amended as follows:

1.

The following definitions are hereby added in alphabetical order to Section 2 of
the Plan:

“‘Conversion Award’ shall have the meaning specified in Section 15 hereof.”

“‘QEP’ shall mean QEP Resources, Inc., a Delaware corporation.”

“‘Service’ shall include any Participant’s service as an employee, nonemployee
director, or consultant of an Employer and, with respect to the Conversion
Awards, ‘Service’ shall also include any Participant’s service as an employee,
nonemployee director, or consultant of QEP or any business entity to the extent
that QEP would be deemed an ‘eligible issuer of service recipient stock’ to the
service providers of such entity, as determined pursuant to Treasury Regulation
Section 1.409A-1(b)(5)(iii)(E).”

2.

The definition of “Termination of Service” in Section 2 of the Plan is hereby
amended and restated as follows:

“‘Termination of Service’ shall mean the date on which a Participant’s Service
shall cease for any reason.”

3.

The first sentence of the second paragraph of Section 5 is hereby amended and
restated as follows:

“For purposes of determining the number of shares of Common Stock that remain
available for issuance under this Plan, the number of shares corresponding to
Awards (including Conversion Awards) under the Plan that are forfeited or
cancelled or otherwise expire for any reason without having been exercised or
settled or that is settled through issuance of consideration other than shares
(including, without limitation, cash) shall be added back to the Plan and will
again be available for the grant of Awards.”

4.

The following sentence is hereby added to the end of Section 14 of the Plan:

“For the avoidance of doubt, the consummation of the spin-off of QEP by the
Company pursuant to the transactions contemplated by the Separation Agreement
(as defined in Section 15) shall not be deemed to be a Change of Control of the
Company under this Section 14.”

5.

The following new Section 15 is hereby immediately following Section 14 of the
Plan:

“Section 15.

Conversion Awards

(a)

As a result of the spin-off transaction contemplated by that certain Separation
and Distribution Agreement, by and between the Company and QEP, dated as of June
14, 2010 (the ‘Separation Agreement’), (i) certain Awards may be adjusted under
the Plan in connection with the equitable adjustment set forth therein, and (ii)
shares of Restricted Stock may be granted under the Plan as a result of the
conversion of certain outstanding cash awards under the Questar Corporation
Long-Term Cash Incentive Plan (the ‘Questar LTCIP’) (collectively, the
‘Conversion Awards’). Notwithstanding any other provision of the Plan to the
contrary and subject to the terms of that certain Employee Matters Agreement, by
and between the Company and QEP, dated as of June 14, 2010, (i) the number of
shares to be subject to each Conversion Award shall be determined by the
Committee, and (ii) the other terms and conditions of each Conversion Award,
including option exercise price, shall be determined by the Committee, provided
that such determinations are made prior to the ‘Distribution’ (as defined in the
Separation Agreement).  

(b)

With respect to any Conversion Award (other than a Conversion Award consisting
of Restricted Stock issued in exchange for a cash award under the Questar LTCIP)
held by an employee, consultant, or non-employee director in the employ or
service of QEP (a ‘QEP Holder’), the Committee shall, upon written notification
from QEP, provide that any such Conversion Award shall vest upon the terms and
conditions set forth in such notification, to the extent permitted by the Plan.
 

(c)

If a Change in Control of QEP (as defined below) occurs and a QEP Holder incurs
a Qualifying Termination of Employment (as defined below) from QEP within 2
years following the date of such Change in Control of QEP, all Conversion Awards
(other than a Conversion Award consisting of Restricted Stock issued in exchange
for a cash award under the Questar LTCIP) held by a QEP Holder shall vest
immediately.  For the purposes of this Section 15(c):

2

(i)

A ‘Change in Control of QEP’ shall be deemed to have occurred upon a ‘Change in
Control of the Company’ as such term is defined in the QEP Resources, Inc. 2010
Long-Term Stock Incentive Plan, as may be amended from time to time.

(ii)

A ‘Qualifying Termination’ shall be deemed to have occurred if a QEP Holder’s
employment with QEP is terminated by QEP without ‘Cause’ or by the QEP Holder
for ‘Good Reason’ (as such terms are defined in the QEP Resources, Inc.
Executive Severance Compensation Plan, as may be amended from time to time,
whether or not such QEP Holder is a participant in such plan.

(d)

QEP shall be an intended third party beneficiary of, and shall have standing to
enforce the terms of, this Section 15 as if it were a party hereto.”

6.

This First Amendment shall be and is hereby incorporated in and forms a part of
the Plan.

7.

All other terms and provisions of the Plan shall remain unchanged except as
specifically modified herein.

[Signature Page Follows]

3

I hereby certify that the foregoing First Amendment to the Questar Corporation
Long-Term Stock Incentive Plan was duly adopted by the Board of Directors of
Questar Corporation as of June 12, 2010.

Executed on this _____ day of _________, 2010.

By: __________________________________

Keith O. Rattie

Chairman, President and Chief Executive Officer