Re: Amendment to Commitment Letter Agreement (“Amendment to the Commitment Letter Agreement”) dated April 6th, 2011 between NOVA Gas Transmission Ltd. (“NGTL”) and Quicksilver Resources Canada Inc. (the “Customer”)

Exhibit 10.2

[TransCanada Logo]

August 28th, 2012

Quicksilver Resources Canada Inc.

One Palliser Square

0000, 000-0xx Xxxxxx XX

Xxxxxxx, XX X0X 0X0

Attention:              Xxxxx Xxxxxx

Marketing Manager

Dear Xx. Xxxxxx:

Re: Amendment to Commitment Letter Agreement (“Amendment to the Commitment Letter Agreement”) dated April 6th, 2011 between NOVA Gas Transmission Ltd. (“NGTL”) and Quicksilver Resources Canada Inc. (the “Customer”)

Further to recent correspondence between the parties, the Customer has requested that NGTL delay the targeted in-service date for the Pipeline Project from May 1, 2014 to August 1, 2015. NGTL has agreed to the delay, subject to certain terms and conditions set out in the PEA Amending Agreement between the parties, dated August 28th, 2012.  Customer and NGTL also wish to revise the Commitment Letter Agreement to reflect the delayed targeted in-service date:

1.   Customer and NGTL agree that the date “May 1, 2014” set out in paragraph 1.b. of the Commitment Letter Agreement is deleted and replaced with “August 1, 2015”.

2.   Unless otherwise defined in this Amendment to the Commitment Letter Agreement, all capitalized terms contained in this Amendment to the Commitment Letter Agreement which are defined in the Commitment Letter Agreement shall have the meaning given to them in the Commitment Letter Agreement.  All references to the Project Expenditure Authorization Agreement or PEA and the Schedules of Services or SOS shall mean those agreements as amended.

3.   The Commitment Letter Agreement shall remain in full force and effect as amended by this Amendment to the Commitment Letter Agreement and is hereby ratified and confirmed as amended.

4.   This Amendment to the Commitment Letter Agreement may be executed in counterpart and a complete set of counterpart pages shall be provided to each party.  A facsimile signature shall be deemed to be an original.

2

Please indicate your agreement to the terms and conditions of this Amendment to the Commitment Letter Agreement below.  If you have any questions or would like to discuss this further, please call Xxx Xxxxx, Customer Account Manager, at (000) 000-0000.

Yours truly,

/s/ Xxx Xxxxx

Xxx Xxxxx

Customer Account Manager

NOVA GAS TRANSMISSION LTD.

By:   /s/ Xxxxxxx X. X. Xxxxx                                                       

Name:  Xxxxxxx X. X. Xxxxx

Title:    Vice President, Commercial - West

Canadian and Eastern U.S. Pipelines

By:   /s/ Xxxx Xxxxxxxxx                                                              

Name: Xxxx Xxxxxxxxx

Title:   President

NOVA Gas Transmission Ltd.

The terms and conditions of this Amendment to the Commitment Letter Agreement are hereby agreed to this 28th day of August, 2012 by:

QUICKSILVER RESOURCES CANADA INC.

Per:  /s/ Xxxxxx X. Xxxxxx                                                        

Name: Xxxxxx X. Xxxxxx

Title: President and CEO

Per:    _______________________________________

Name:

Title: