The document listed below in this Section and filed as Exhibit 99.1 to this Form 6-K is hereby filed with the Securities and Exchange Commission for the purpose of being and hereby is incorporated by reference into Registration Statement on Form F-9 (Reg. No. 333-121265) under the Securities Act of 1933, as amended.

The Management’s Discussion and Analysis (MD&A) dated February 22, 2007 should be read in conjunction with the audited Consolidated Financial Statements of TransCanada PipeLines Limited (TCPL or the Company) and the notes thereto for the year ended December 31, 2006.

tce-TransCanada-Keystone-FERC-6.106.0-Rate-Schedule.pdf

Four families of house wrens chose specially made nesting cavities in the company’s pipeline markers as safe, cozy places to rear their young this summer. And, thanks to a little foresight and some delicate work, the evolution of two of those families was captured on camera.

This document is a comprehensive report on a company's activities throughout the preceding year.

tce-FERC-2.73.0-Marketlink-Rates-Schedule.pdf

tce-TransCanada-Keystone-FERC-6.105.0-Rate-Schedule.pdf