EXHIBIT 10.22

FIRST AMENDING AGREEMENT TO
AMENDED AND RESTATED CREDIT AGREEMENT
dated as of April 27, 2012
ALTALINK INVESTMENT MANAGEMENT LTD.,
in its capacity as general partner of
ALTALINK INVESTMENTS, L.P.,
as Borrower,
- and -
ALTALINK INVESTMENT MANAGEMENT LTD.,
as General Partner,
- and -
ROYAL BANK OF CANADA,
as Administrative Agent of the Lenders, and as Lender,
- and -
THE LENDERS PARTY HERETO,
as Lenders

RBC – AltaLink – First Amending Agreement to Amended and Restated Credit
Agreement
LEGAL_1:23047728.5

--------------------------------------------------------------------------------

FIRST AMENDING AGREEMENT TO THE AMENDED AND RESTATED CREDIT AGREEMENT, dated as
of April 27, 2012, among AltaLink Investment Management Ltd., in its capacity as
general partner of AltaLink Investments, L.P., as Borrower, AltaLink Investment
Management Ltd., as General Partner, Royal Bank of Canada, as Agent on behalf of
itself as Lender and the other Lenders party hereto.

RECITALS

WHEREAS AltaLink Investment Management Ltd., in its capacity as general partner
of AltaLink Investments, L.P., as Borrower, Royal Bank of Canada, as Agent on
behalf of itself as Lender and the other Lenders are parties to an Amended and
Restated Credit Agreement made as of December 14, 2011 (the "Original Credit
Agreement");

AND WHEREAS the Borrower, commencing with the 2011 Fiscal Year, adopted IFRS and
as a result, and pursuant to Section 1.5 of the Original Credit Agreement, the
Borrower, the General Partner, the Lenders and the Agent have agreed to amend
certain provisions of the Original Credit Agreement in the manner and on the
terms and conditions provided for herein.

NOW THEREFORE for good and valuable consideration, the receipt and sufficiency
of which is hereby acknowledged, the parties hereto agree as follows:

ARTICLE 1
DEFINITIONS

1.1
Definitions

All capitalized terms not otherwise defined herein shall have the meanings
ascribed thereto in the Original Credit Agreement.

ARTICLE 2
AMENDMENTS

2.1
Amendment to definition of EBITDA. The parties hereto confirm that the
definition of EBITDA in the Original Credit Agreement shall be amended by adding
the following language at the end of such definition: " , provided that any
amounts which were included in Net Income and which represent the Borrower's
share of the net income of AltaLink which was available for distribution to the
Borrower during the applicable period shall not be deducted for the purpose of
this paragraph (b)(ii)."

2.2
Amendment to Section 10.l(a)(vi) The parties hereto confirm that Section
10.l(a)(vi) of the Original Credit Agreement shall be amended by replacing such
sub-paragraph (vi) in its entirety with the following:

"(vi) upon delivery of each of the items set out in Sections 10.l(a)(i) and (ii)
of this Agreement, the Borrower's Certificate of Compliance, which Certificate
of Compliance shall be accompanied by, inter alia, details of the calculation of
EBITDA in accordance with GAAP for the purposes of the Interest Coverage Ratio
in Section 10.24(a), in form and substance satisfactory to the Lenders."

RBC – AltaLink – First Amending Agreement to Amended and Restated Credit
Agreement
LEGAL_1:23047728.5

--------------------------------------------------------------------------------

-2-

2.3
Amendment to Section 10.24. The parties hereto confirm that Section 10.24(a) of
the Original Credit Agreement shall be replaced in its entirety with the
following:

(a)
Interest Coverage Ratio. The Borrower shall maintain, measured each Fiscal
Quarter in each Fiscal Year, commencing with the Fiscal Quarter ending December
31, 2010, a ratio of EBITDA for the four Fiscal Quarters then ended to Interest
Expense for the four Fiscal Quarters then ended, of not less than 2.25: 1. The
parties agree that for the purposes of this Section 10.24(a), and provided that
the reporting requirements in Section 10.l(a)(vi) are complied with in respect
of such calculation, commencing with the first Fiscal Quarter in 2011, EBITDA
shall be calculated on the basis of GAAP (as in effect immediately prior to the
adoption by the Borrower of IFRS), notwithstanding the fact that the Borrower
may have adopted IFRS; and"

2.4
Waiver.

Subject to the conditions set forth herein, pursuant to Section 21.1 of the
Credit Agreement, each of the Agent and the Lenders agree to waive any Default
or Event of Default under Section 10.24(a) of the Original Credit Agreement that
may have occurred, prior to the date of this First Amending Agreement, as a
result of the Borrower's adoption of IFRS or as a result of the calculation of
the Interest Coverage Ratio using the definition of EBITDA (prior to such
definition being amended as set forth herein).

ARTICLE 3
CONDITIONS PRECEDENT

3.1
Conditions Precedent

This First Amending Agreement shall become effective when the Agent shall have
received this First Amending Agreement duly executed and delivered by the Agent,
the Lenders, the Borrower and the General Partner.

ARTICLE 4
REPRESENTATIONS AND WARRANTIES

4.1
Representations and Warranties True and Correct; No Default or Event of Default

The Borrower and General Partner each hereby represents and warrants to the
Agent and the Lenders that after giving effect to this First Amending Agreement,
(i) each of the representations and warranties of the Borrower and the General
Partner, as the case may be, contained in the Original Credit Agreement and each
of the other Loan Documents is true and correct on, and as of the date hereof as
if made on such date (except to the extent that such representation or warranty
expressly relates to an earlier date and except for changes therein expressly
permitted or expressly contemplated by the Original Credit Agreement) and (ii)
no event has occurred and is continuing which constitutes or would constitute a
Default or an Event of Default.

RBC – AltaLink – First Amending Agreement to Amended and Restated Credit
Agreement
LEGAL_1:23047728.5

--------------------------------------------------------------------------------

-3-

ARTICLE 5
MISCELLANEOUS

5.1
No Other Amendments, Waivers or Consents

Except as expressly set forth herein, the Original Credit Agreement shall be
unmodified and shall continue to be in full force and effect in accordance with
its terms. The execution, delivery and effectiveness of each of the waiver and
amendments in this First Amending Agreement shall not be deemed to be a waiver
of compliance in the future or a waiver of any preceding or succeeding breach of
any covenant or provision of the Credit Agreement.

5.2
Time

Time is of the essence in the performance of the parties' respective obligations
in this First Amending Agreement.

5.3
Governing Law

This First Amending Agreement is a contract made under and shall be governed by
and construed in accordance with the laws of the Province of Alberta and the
federal laws of Canada applicable therein.

5.4
Successors and Assigns

This First Amending Agreement shall enure to the benefit of and be binding upon
the parties hereto and their respective successors and any assigns, transferees
and endorsees of the Agent or any Lender. Nothing in this First Amending
Agreement, express or implied, shall give to any Person, other than the parties
hereto and their successors hereunder, any benefit or any legal or equitable
right, remedy or claim under this First Amending Agreement.

5.5
Counterparts

This First Amending Agreement may be executed by the parties hereto in
counterparts and may be executed and delivered by facsimile or other electronic
means and all such counterparts and facsimiles shall together constitute one and
the same agreement.

[remainder of page intentionally left blank – signature pages follow]

RBC – AltaLink – First Amending Agreement to Amended and Restated Credit
Agreement
LEGAL_1:23047728.5

--------------------------------------------------------------------------------

IN WITNESS OF WHICH the parties hereto have duly executed this First Amending
Agreement as of the date set forth on the first page of this Agreement.

ALTALINK INVESTMENT
 
MANAGEMENT LTD.,
 
in its capacity as General Partner of
 
ALTALINK INVESTMENTS, L.P
 
 
 
 
 
By:
 
/s/ Jussi Jaakkola
 
 
 
Name: Jussi Jaakkola
 
 
 
Title: VP Infrastructure Investment
 
By:
 
 
 
 
 
Name:
 
 
 
Title:
 

RBC – AltaLink – First Amending Agreement to Amended and Restated Credit
Agreement

--------------------------------------------------------------------------------

ALTALINK INVESTMENT
 
MANAGEMENT LTD.
 
 
 
By:
 
/s/ Jussi Jaakkola
 
 
 
Name: Jussi Jaakkola
 
 
 
Title: VP Infrastructure Investment
 
By:
 
 
 
 
 
Name:
 
 
 
Title:
 

RBC – AltaLink – First Amending Agreement to Amended and Restated Credit
Agreement
LEGAL_1:23047728.5

--------------------------------------------------------------------------------

ROYAL BANK OF CANADA,
 
as Agent
 
 
 
 
 
By:
 
/s/ Yvonne Brazier
 
 
 
Name: Yvonne Brazier
 
 
 
Title: Manager, Agency
 

RBC – AltaLink – First Amending Agreement to Amended and Restated Credit
Agreement
LEGAL_1:23047728.5

--------------------------------------------------------------------------------

ROYAL BANK OF CANADA,
 
as Lender
 
 
 
 
 
By:
 
/s/ Timothy P. Murray
 
 
 
Name: Timothy P. Murray
 
 
 
Title: Authorized Signatory
 
By:
 
 
 
 
 
Name:
 
 
 
Title:
 

RBC – AltaLink – First Amending Agreement to Amended and Restated Credit
Agreement
LEGAL_1:23047728.5

--------------------------------------------------------------------------------

BANK OF MONTREAL,
 
as Lender
 
 
 
 
 
By:
 
/s/ Carol McDonald
 
 
 
Name: Carol McDonald
 
 
 
Title: Vice President
 
By:
 
 
 
 
 
Name:
 
 
 
Title:
 

RBC – AltaLink – First Amending Agreement to Amended and Restated Credit
Agreement
LEGAL_1:23047728.5

--------------------------------------------------------------------------------

ALBERTA TREASURY BRANCHES,
 
as Lender
 
 
 
 
 
By:
 
/s/ Tim Poole
 
 
 
Name: Tim Poole
 
 
 
Title: Director
 
By:
 
/s/ Elin Ingolfsson
 
 
 
Name: Elin Ingolfsson
 
 
 
Title: Associate Director
 

RBC – AltaLink – First Amending Agreement to Amended and Restated Credit
Agreement
LEGAL_1:23047728.5

--------------------------------------------------------------------------------

BANK OF NOVA SCOTIA,
 
as Lender
 
 
 
 
 
By:
 
/s/ Dee Patterson
 
 
 
Name: Dee Patterson
 
 
 
Title: Managing Director
 
By:
 
/s/ Matthew Hartnoll
 
 
 
Name: Matthew Hartnoll
 
 
 
Title: Associate Director
 

RBC – AltaLink – First Amending Agreement to Amended and Restated Credit
Agreement
LEGAL_1:23047728.5

--------------------------------------------------------------------------------

NATIONAL BANK OF CANADA,
 
as Lender
 
 
 
 
 
By:
 
/s/ Mark Williamson
 
 
 
Name: Mark Williamson
 
 
 
Title: Authorized Signatory
 
By:
 
/s/ John Niedermier
 
 
 
Name: John Niedermier
 
 
 
Title: Authorized Signatory
 

RBC – AltaLink – First Amending Agreement to Amended and Restated Credit
Agreement
LEGAL_1:23047728.5