TransCanada Pipelines 40-F/A 2011 FY Annual report (Canada) (amended)

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Exhibit 31.1

Certifications

I, Russell K. Girling, certify that:

1.

I have reviewed this annual report on Form 40-F/A of TransCanada PipeLines Limited;

2.

Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report; and

3.

Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the issuer as of, and for, the periods presented in this report.

Dated February 27, 2012

/s/ RUSSELL K. GIRLING
Russell K. Girling
President and Chief Executive Officer

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Exhibit 31.1

Certifications