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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
Originator-Key-Asymmetric:
 MFgwCgYEVQgBAQICAf8DSgAwRwJAW2sNKK9AVtBzYZmr6aGjlWyK3XmZv3dTINen
 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 MLVOQdChktEZnV8OiQXObVaRQSkK+oivVfJjGFtvuKjc/NlvFwVGtlg+4XJrqOr4
 iE2X08xRLvUYLkE/+BfrkA==

<SEC-DOCUMENT>9999999995-07-003694.txt : 20070917
<SEC-HEADER>9999999995-07-003694.hdr.sgml : 20070917
<ACCEPTANCE-DATETIME>20070917001524
ACCESSION NUMBER:		9999999995-07-003694
CONFORMED SUBMISSION TYPE:	EFFECT
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20070914
DATE AS OF CHANGE:		20070917
EFFECTIVENESS DATE:		20070914

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			TRANSCANADA PIPELINES LTD
		CENTRAL INDEX KEY:			0000099070
		STANDARD INDUSTRIAL CLASSIFICATION:	NATURAL GAS TRANSMISSION [4922]
		IRS NUMBER:				522179728
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		EFFECT
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	333-145980
		FILM NUMBER:		071118931

	BUSINESS ADDRESS:	
		STREET 1:		450 -1ST STREET SW
		STREET 2:		P O BOX 1000 STATION M
		CITY:			CALGARY ALBERTA
		STATE:			A0
		ZIP:			T2P 5H1
		BUSINESS PHONE:		4039207669

	MAIL ADDRESS:	
		STREET 1:		450 I STREET SW
		CITY:			CALGARY ALBERTA
		STATE:			A0
		ZIP:			T2P 5H1
</SEC-HEADER>
<DOCUMENT>
<TYPE>EFFECT
<SEQUENCE>1
<FILENAME>primary_doc.xml
<TEXT>
<XML>
<?xml version="1.0"?>
<edgarSubmission>

    <schemaVersion>X0101</schemaVersion>

    <submissionType>EFFECT</submissionType>

    <act>33</act>

    <testOrLive>LIVE</testOrLive>

    <effectiveData>
        <finalEffectivenessDispDate>2007-09-14</finalEffectivenessDispDate>
        <finalEffectivenessDispTime>16:00:00</finalEffectivenessDispTime>
        <form>F-9</form>
        <filer>
            <cik>0000099070</cik>
            <entityName>TRANSCANADA PIPELINES LTD</entityName>
            <fileNumber>333-145980</fileNumber>
        </filer>
    </effectiveData>
</edgarSubmission>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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