SEC Form 4

FORM 4		UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940	OMB APPROVAL OMB Number: 3235-0287 Estimated average burden hours per response: 0.5
	Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

1. Name and Address of Reporting Person* GIRLING RUSSELL K. (Last) (First) (Middle) 450 1ST STREET SW (Street) CALGARY A0 T2P 5H1 (City) (State) (Zip)	2. Issuer Name and Ticker or Trading Symbol TC PIPELINES LP [ TCLP ]	5. Relationship of Reporting Person(s) to Issuer (Check all applicable) X Director 10% Owner X Officer (give title below) Other (specify below) Chief Executive Officer
	3. Date of Earliest Transaction (Month/Day/Year) 08/14/2007
	4. If Amendment, Date of Original Filed (Month/Day/Year)	6. Individual or Joint/Group Filing (Check Applicable Line) X Form filed by One Reporting Person Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Units Representing Limited Partnership Interests	08/14/2007		P		3,000	A	$34.4	3,000	D
Common Units Representing Limited Partnership Interests	08/14/2007		P		3,000	A	$34.4999	6,000	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

Remarks:

Exhibit 24 - Power of Attorney.

	/s/ Avery C. Smith, attorney for Russell K. Girling	08/16/2007
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

Exhibit 24

POWER OF ATTORNEY

KNOW ALL MEN BY THESE PRESENTS that I, Russell K. Girling of
Calgary, Alberta, Canada, do hereby constitute and appoint Donald J. DeGrandis,
and failing him, any of Michael R. Mercier, Avery C. Smith, Annie C. Belecki
or Bruce D. Nysetvold, each of Calgary, my true and lawful attorney for me,
and in place and stead and for my sole use and benefit to prepare, execute,
deliver or file in my name, and as my act and deed (i) all insider reports
required to be filed by me relating to my holdings of securities, as
applicable, of TransCanada Corporation, TransCanada PipeLines
Limited, NOVA Gas Transmission Ltd. or TC PipeLines, LP
with the Ontario Securities Commission, Autorite des marches
financiers, the Alberta Securities Commission, the Manitoba Securities
Commission, the British Columbia Securities Commission and all
other securities regulatory bodies in Canada, if any, where insider reports
are or shall be required to be filed by me, and (ii) all insider reports
required to be filed by me with any regulatory authority of a jurisdiction
in which securities of TransCanada Corporation, TransCanada PipeLines
Limited, Nova Gas Transmission Ltd. or TC PipeLines, LP are publicly
traded on an organized market.

I, Russell K. Girling, hereby agree and covenant for myself,
my heirs, executors and administrators, to ratify and confirm
whatsoever my attorney shall lawfully do or cause to be done in the
premises by virtue of these presents.

I further undertake and agree to provide prompt notice to my attorneys
within the prescribed time limits of applicable securities laws or any
changes in my holdings of the aforementioned securities.

This Power of Attorney shall be and remain in full force and effect until
due notice in writing of its revocation shall have been given to
the Ontario Securities Commission, Autorite des marches financiers,
the Alberta Securities Commission, the Manitoba Securities Commission,
the British Columbia Securities Commission and all other securities
regulatory bodies, if any, where the aforementioned insider reports are
required to be filed by me.


IN WITNESS WHEREOF, I have set my hand and
seal, this 16th day of August, 2007.

/s/Russell K. Girling
Signed "Russell K. Girling"
Name: Russell K. Girling


SIGNED, SEALED AND DELIVERED
In the presence of:

/s/Judith Robson
Signed "Judith Robson"
(witness)