<SEC-DOCUMENT>0001104659-21-031587.txt : 20210303
<SEC-HEADER>0001104659-21-031587.hdr.sgml : 20210303
<ACCEPTANCE-DATETIME>20210303171711
ACCESSION NUMBER:		0001104659-21-031587
CONFORMED SUBMISSION TYPE:	SC 13D/A
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20210303
DATE AS OF CHANGE:		20210303
GROUP MEMBERS:		TC PIPELINES GP, INC.
GROUP MEMBERS:		TRANSCAN NORTHERN LTD.
GROUP MEMBERS:		TRANSCANADA PIPELINE USA LTD.
GROUP MEMBERS:		TRANSCANADA PIPELINES LTD

SUBJECT COMPANY:	

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			TC PIPELINES LP
		CENTRAL INDEX KEY:			0001075607
		STANDARD INDUSTRIAL CLASSIFICATION:	NATURAL GAS TRANSMISSION [4922]
		IRS NUMBER:				522135448
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SC 13D/A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	005-56405
		FILM NUMBER:		21710444

	BUSINESS ADDRESS:	
		STREET 1:		700 LOUISIANA STREET, SUITE 700
		CITY:			HOUSTON
		STATE:			TX
		ZIP:			77002-2700
		BUSINESS PHONE:		(877) 290-2772

	MAIL ADDRESS:	
		STREET 1:		700 LOUISIANA STREET, SUITE 700
		CITY:			HOUSTON
		STATE:			TX
		ZIP:			77002-2700

FILED BY:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			TC ENERGY CORP
		CENTRAL INDEX KEY:			0001232384
		STANDARD INDUSTRIAL CLASSIFICATION:	NATURAL GAS TRANSMISSION [4922]
		IRS NUMBER:				000000000
		STATE OF INCORPORATION:			A0
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SC 13D/A

	BUSINESS ADDRESS:	
		STREET 1:		450 - 1ST STREET S.W.
		CITY:			CALGARY ALBERTA
		STATE:			A0
		ZIP:			T2P 5H1
		BUSINESS PHONE:		4039202000

	MAIL ADDRESS:	
		STREET 1:		450 - 1ST STREET S.W.
		CITY:			CALGARY ALBERTA
		STATE:			A0
		ZIP:			T2P 5H1

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	TRANSCANADA CORP
		DATE OF NAME CHANGE:	20030513
</SEC-HEADER>
<DOCUMENT>
<TYPE>SC 13D/A
<SEQUENCE>1
<FILENAME>tm218555d1_sc13da.htm
<DESCRIPTION>SC 13D/A
<TEXT>
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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"></P>

<!-- Field: Rule-Page --><DIV STYLE="margin-top: 0pt; margin-bottom: 0pt; width: 100%"><DIV STYLE="font-size: 1pt; border-top: Black 2pt solid; border-bottom: Black 1pt solid">&nbsp;</DIV></DIV><!-- Field: /Rule-Page -->

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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>UNITED STATES<BR>
SECURITIES AND EXCHANGE COMMISSION<BR>
Washington, D.C. 20549</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; text-align: center; margin-top: 0pt; margin-bottom: 0pt"></P>

<!-- Field: Rule-Page --><DIV STYLE="margin: 0pt auto; width: 25%"><DIV STYLE="font-size: 1pt; border-top: Black 1pt solid">&nbsp;</DIV></DIV><!-- Field: /Rule-Page -->

<P STYLE="font: 10pt Times New Roman, Times, Serif; text-align: center; margin-top: 0pt; margin-bottom: 0pt">&nbsp;</P>

<P STYLE="font: 14pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>SCHEDULE 13D</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>Under the Securities Exchange Act of
1934<BR>
(Amendment No.&nbsp;8)*</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 13pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center; border-bottom: Black 0.5pt solid">TC PipeLines,
LP</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">(Name of Issuer)</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center; border-bottom: Black 0.5pt solid">Common
Units</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">(Title of Class&nbsp;of Securities)</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center; border-bottom: Black 0.5pt solid">87233Q
10 8</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">(CUSIP Number)</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">Christine R. Johnston<BR>
450 - 1st Street SW</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">Calgary, Alberta, Canada</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">T2P 5H1</P>

<DIV STYLE="text-align: center; padding: 0in 0in 1pt; border-bottom: Black 0.5pt solid">

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt; text-align: center">(403) 920-2000</P>

</DIV>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">(Name, Address and Telephone Number of Person<BR>
Authorized to Receive Notices and Communications)</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center; border-bottom: Black 0.5pt solid">March&nbsp;3,
2021</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">(Date of Event which Requires Filing of
this Statement)</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">If
the filing person has previously filed a statement on Schedule 13G to report the acquisition that is the subject of this Schedule
13D, and is filing this schedule because of Rule&nbsp;13d-1(e), 13d-1(f)&nbsp;or 13d-1(g), check the following box <FONT STYLE="font-family: Wingdings">&#168;</FONT></FONT>.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>Note</B></FONT>:
Schedules filed in paper format shall include a signed original and five copies of the schedule, including all exhibits. See Rule&nbsp;13d-7
for other parties to whom copies are to be sent.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">*The remainder of this cover page&nbsp;shall be filled out for
a reporting person&rsquo;s initial filing on this form with respect to the subject class of securities, and for any subsequent
amendment containing information which would alter disclosures provided in a prior cover page.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">The information required on the remainder of this cover page&nbsp;shall
not be deemed to be &ldquo;filed&rdquo; for the purpose of Section&nbsp;18 of the Securities Exchange Act of 1934 (&ldquo;Act&rdquo;)
or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however,
see the Notes).</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="border-bottom: Black 1pt solid; font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"></P>

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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"></P>

<!-- Field: Page; Sequence: 1 -->
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    <DIV STYLE="break-before: page; margin-top: 6pt; margin-bottom: 12pt"><P STYLE="margin: 0pt">&nbsp;</P></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="text-align: center; font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt"><B>SCHEDULE 13D</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><B>CUSIP No.&nbsp;87233Q 10 8</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
<TR>
    <TD STYLE="padding: 3pt; width: 6%; border: Black 1pt solid; font-size: 10pt; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 14pt"><B>1</B></FONT></TD>
    <TD STYLE="padding: 3pt; vertical-align: top; width: 94%; border-top: Black 1pt solid; border-right: Black 1pt solid; border-bottom: Black 1pt solid">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT STYLE="font-variant: small-caps">Name of Reporting Persons.</FONT></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">TC Energy Corporation</P></TD></TR>
<TR>
    <TD STYLE="padding: 3pt; border-right: Black 1pt solid; border-bottom: Black 1pt solid; border-left: Black 1pt solid; font-size: 10pt; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 14pt"><B>2</B></FONT></TD>
    <TD STYLE="padding: 3pt; vertical-align: top; border-right: Black 1pt solid; border-bottom: Black 1pt solid">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT STYLE="font-variant: small-caps">Check the Appropriate
        Box if a Member of a Group</FONT></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">(a)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</FONT><FONT STYLE="font-family: Wingdings"><FONT STYLE="font-family: Wingdings">&#168;</FONT></FONT></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">(b)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</FONT><FONT STYLE="font-family: Wingdings"><FONT STYLE="font-family: Wingdings">&#168;</FONT></FONT></P></TD></TR>
<TR>
    <TD STYLE="padding: 3pt; border-right: Black 1pt solid; border-bottom: Black 1pt solid; border-left: Black 1pt solid; font-size: 10pt; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 14pt"><B>3</B></FONT></TD>
    <TD STYLE="border-right: Black 1pt solid; padding: 3pt; vertical-align: top; border-bottom: Black 1pt solid">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">SEC <FONT STYLE="font-variant: small-caps">Use Only</FONT></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P></TD></TR>
<TR>
    <TD STYLE="padding: 3pt; border-right: Black 1pt solid; border-bottom: Black 1pt solid; border-left: Black 1pt solid; font-size: 10pt; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 14pt"><B>4</B></FONT></TD>
    <TD STYLE="padding: 3pt; vertical-align: top; border-right: Black 1pt solid; border-bottom: Black 1pt solid">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT STYLE="font-variant: small-caps">Source of Funds (See
        Instructions)</FONT></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">OO</P></TD></TR>
<TR>
    <TD STYLE="padding: 3pt; border-right: Black 1pt solid; border-bottom: Black 1pt solid; border-left: Black 1pt solid; font-size: 10pt; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 14pt"><B>5</B></FONT></TD>
    <TD STYLE="padding: 3pt; vertical-align: top; border-right: Black 1pt solid; border-bottom: Black 1pt solid">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT STYLE="font-variant: small-caps">Check box if disclosure
        of legal proceedings is required pursuant to Items 2(D)&nbsp;or 2(E)</FONT></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>
        <P STYLE="font: 10pt Wingdings; margin: 0pt 0"><FONT STYLE="font-family: Wingdings">&#168;</FONT></P></TD></TR>
<TR>
    <TD STYLE="border-right: Black 1pt solid; padding: 3pt; border-left: Black 1pt solid; font-size: 10pt; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 14pt"><B>6</B></FONT></TD>
    <TD STYLE="border-right: Black 1pt solid; padding: 3pt; vertical-align: top">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT STYLE="font-variant: small-caps">Citizenship or Place
        of Organization</FONT></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Canada</P></TD></TR>
</TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"></P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
<TR>
    <TD ROWSPAN="4" STYLE="padding: 3pt; width: 15%; border: Black 1pt solid; font-size: 10pt; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Number of Shares Beneficially Owned by Each Reporting Person with</FONT></TD>
    <TD STYLE="padding: 3pt; width: 6%; border-top: Black 1pt solid; border-right: Black 1pt solid; border-bottom: Black 1pt solid; font-size: 10pt; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 14pt"><B>7</B></FONT></TD>
    <TD STYLE="padding: 3pt; vertical-align: top; width: 79%; border-top: Black 1pt solid; border-right: Black 1pt solid; border-bottom: Black 1pt solid">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT STYLE="font-variant: small-caps">Sole Voting Power</FONT></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">71,306,397</P></TD></TR>
<TR>
    <TD STYLE="padding: 3pt; border-right: Black 1pt solid; border-bottom: Black 1pt solid; font-size: 10pt; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 14pt"><B>8</B></FONT></TD>
    <TD STYLE="padding: 3pt; vertical-align: top; border-right: Black 1pt solid; border-bottom: Black 1pt solid">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT STYLE="font-variant: small-caps">Shared Voting Power</FONT></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">-0-</P></TD></TR>
<TR>
    <TD STYLE="padding: 3pt; border-right: Black 1pt solid; border-bottom: Black 1pt solid; font-size: 10pt; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 14pt"><B>9</B></FONT></TD>
    <TD STYLE="padding: 3pt; vertical-align: top; border-right: Black 1pt solid; border-bottom: Black 1pt solid">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT STYLE="font-variant: small-caps">Sole Dispositive Power</FONT></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">71,306,397</P></TD></TR>
<TR>
    <TD STYLE="padding: 3pt; border-right: Black 1pt solid; border-bottom: Black 1pt solid; font-size: 10pt; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 14pt"><B>10</B></FONT></TD>
    <TD STYLE="padding: 3pt; vertical-align: top; border-right: Black 1pt solid; border-bottom: Black 1pt solid">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT STYLE="font-variant: small-caps">Shared Dispositive Power</FONT></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">-0-</P></TD></TR>
</TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"></P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
<TR>
    <TD STYLE="border-right: Black 1pt solid; border-bottom: Black 1pt solid; border-left: Black 1pt solid; padding: 3pt; width: 6%; font-size: 10pt; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 14pt"><B>11</B></FONT></TD>
    <TD STYLE="border-right: Black 1pt solid; border-bottom: Black 1pt solid; padding: 3pt; vertical-align: top; width: 94%">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT STYLE="font-variant: small-caps">Aggregate Amount Beneficially
        Owned by Each Reporting Person</FONT></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">71,306,397</P></TD></TR>
<TR>
    <TD STYLE="padding: 3pt; border-right: Black 1pt solid; border-bottom: Black 1pt solid; border-left: Black 1pt solid; font-size: 10pt; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 14pt"><B>12</B></FONT></TD>
    <TD STYLE="padding: 3pt; border-right: Black 1pt solid; border-bottom: Black 1pt solid; vertical-align: top">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT STYLE="font-variant: small-caps">Check if the Aggregate
        Amount in Row (11) Excludes Certain Shares</FONT></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>
        <P STYLE="font: 10pt Wingdings; margin: 0pt 0"><FONT STYLE="font-family: Wingdings">&#168;</FONT></P></TD></TR>
<TR>
    <TD STYLE="padding: 3pt; border-right: Black 1pt solid; border-bottom: Black 1pt solid; border-left: Black 1pt solid; font-size: 10pt; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 14pt"><B>13</B></FONT></TD>
    <TD STYLE="padding: 3pt; border-right: Black 1pt solid; border-bottom: Black 1pt solid; vertical-align: top">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT STYLE="font-variant: small-caps">Percent of Class&nbsp;Represented
        by Amount in Row (11)</FONT></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">100%</P></TD></TR>
<TR>
    <TD STYLE="padding: 3pt; border-right: Black 1pt solid; border-bottom: Black 1pt solid; border-left: Black 1pt solid; font-size: 10pt; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 14pt"><B>14</B></FONT></TD>
    <TD STYLE="padding: 3pt; border-right: Black 1pt solid; border-bottom: Black 1pt solid; vertical-align: top">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT STYLE="font-variant: small-caps">Type of Reporting Person
        (See Instructions)</FONT></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">HC, CO</P></TD></TR>
</TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"></P>

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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"></P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0"></TD><TD STYLE="width: 0.25in">1</TD><TD>As of March&nbsp;3, 2021, there were 71,306,397 common units of TC Pipelines, LP outstanding.</TD></TR></TABLE>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"></P>

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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; text-align: center; margin-top: 0pt; margin-bottom: 0pt"><B>SCHEDULE 13D</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><B>CUSIP No. 87233Q 10 8</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

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<TR>
    <TD STYLE="padding: 3pt; border: Black 1pt solid; width: 6%; font-size: 10pt; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 14pt"><B>1</B></FONT></TD>
    <TD STYLE="padding: 3pt; border-top: Black 1pt solid; border-right: Black 1pt solid; border-bottom: Black 1pt solid; vertical-align: top; width: 94%">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT STYLE="font-variant: small-caps">Name of Reporting Persons.</FONT></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">TransCanada PipeLines Limited</P></TD></TR>
<TR>
    <TD STYLE="padding: 3pt; border-right: Black 1pt solid; border-bottom: Black 1pt solid; border-left: Black 1pt solid; font-size: 10pt; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 14pt"><B>2</B></FONT></TD>
    <TD STYLE="padding: 3pt; border-right: Black 1pt solid; border-bottom: Black 1pt solid; vertical-align: top">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT STYLE="font-variant: small-caps">Check the Appropriate
        Box if a Member of a Group</FONT></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">(a)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</FONT><FONT STYLE="font-family: Wingdings"><FONT STYLE="font-family: Wingdings">&#168;</FONT></FONT></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">(b)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</FONT><FONT STYLE="font-family: Wingdings"><FONT STYLE="font-family: Wingdings">&#168;</FONT></FONT></P></TD></TR>
<TR>
    <TD STYLE="padding: 3pt; border-right: Black 1pt solid; border-bottom: Black 1pt solid; border-left: Black 1pt solid; font-size: 10pt; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 14pt"><B>3</B></FONT></TD>
    <TD STYLE="padding: 3pt; border-right: Black 1pt solid; border-bottom: Black 1pt solid; vertical-align: top">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">SEC <FONT STYLE="font-variant: small-caps">Use Only</FONT></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P></TD></TR>
<TR>
    <TD STYLE="padding: 3pt; border-right: Black 1pt solid; border-bottom: Black 1pt solid; border-left: Black 1pt solid; font-size: 10pt; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 14pt"><B>4</B></FONT></TD>
    <TD STYLE="padding: 3pt; border-right: Black 1pt solid; border-bottom: Black 1pt solid; vertical-align: top">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT STYLE="font-variant: small-caps">Source of Funds (See
        Instructions)</FONT></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">AF</P></TD></TR>
<TR>
    <TD STYLE="padding: 3pt; border-right: Black 1pt solid; border-bottom: Black 1pt solid; border-left: Black 1pt solid; font-size: 10pt; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 14pt"><B>5</B></FONT></TD>
    <TD STYLE="padding: 3pt; border-right: Black 1pt solid; border-bottom: Black 1pt solid; vertical-align: top">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT STYLE="font-variant: small-caps">Check box if disclosure
        of legal proceedings is required pursuant to Items 2(D)&nbsp;or 2(E)</FONT></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>
        <P STYLE="font: 10pt Wingdings; margin: 0pt 0"><FONT STYLE="font-family: Wingdings">&#168;</FONT></P></TD></TR>
<TR>
    <TD STYLE="border-right: Black 1pt solid; padding: 3pt; border-left: Black 1pt solid; font-size: 10pt; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 14pt"><B>6</B></FONT></TD>
    <TD STYLE="border-right: Black 1pt solid; padding: 3pt; vertical-align: top">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT STYLE="font-variant: small-caps">Citizenship or Place
        of Organization</FONT></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Canada</P></TD></TR>
</TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"></P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
<TR>
    <TD ROWSPAN="4" STYLE="border-top: Black 1pt solid; border-right: Black 1pt solid; border-left: Black 1pt solid; padding: 3pt; width: 15%; font-size: 10pt; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Number of Shares Beneficially Owned by Each Reporting Person with</FONT></TD>
    <TD STYLE="padding: 3pt; border-top: Black 1pt solid; border-right: Black 1pt solid; border-bottom: Black 1pt solid; width: 6%; font-size: 10pt; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 14pt"><B>7</B></FONT></TD>
    <TD STYLE="padding: 3pt; border-top: Black 1pt solid; border-right: Black 1pt solid; border-bottom: Black 1pt solid; vertical-align: top; width: 79%">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT STYLE="font-variant: small-caps">Sole Voting Power</FONT></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">71,306,397</P></TD></TR>
<TR>
    <TD STYLE="padding: 3pt; border-right: Black 1pt solid; border-bottom: Black 1pt solid; font-size: 10pt; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 14pt"><B>8</B></FONT></TD>
    <TD STYLE="padding: 3pt; border-right: Black 1pt solid; border-bottom: Black 1pt solid; vertical-align: top">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT STYLE="font-variant: small-caps">Shared Voting Power</FONT></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">-0-</P></TD></TR>
<TR>
    <TD STYLE="padding: 3pt; border-right: Black 1pt solid; border-bottom: Black 1pt solid; font-size: 10pt; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 14pt"><B>9</B></FONT></TD>
    <TD STYLE="padding: 3pt; border-right: Black 1pt solid; border-bottom: Black 1pt solid; vertical-align: top">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT STYLE="font-variant: small-caps">Sole Dispositive Power</FONT></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">71,306,397</P></TD></TR>
<TR>
    <TD STYLE="border-right: Black 1pt solid; padding: 3pt; font-size: 10pt; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 14pt"><B>10</B></FONT></TD>
    <TD STYLE="border-right: Black 1pt solid; padding: 3pt; vertical-align: top">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT STYLE="font-variant: small-caps">Shared Dispositive Power</FONT></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">-0-</P></TD></TR>
</TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"></P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
<TR>
    <TD STYLE="padding: 3pt; width: 6%; border: Black 1pt solid; font-size: 10pt; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 14pt"><B>11</B></FONT></TD>
    <TD STYLE="padding: 3pt; vertical-align: top; width: 94%; border-top: Black 1pt solid; border-right: Black 1pt solid; border-bottom: Black 1pt solid">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT STYLE="font-variant: small-caps">Aggregate Amount Beneficially
        Owned by Each Reporting Person</FONT></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">71,306,397</P></TD></TR>
<TR>
    <TD STYLE="padding: 3pt; border-right: Black 1pt solid; border-bottom: Black 1pt solid; border-left: Black 1pt solid; font-size: 10pt; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 14pt"><B>12</B></FONT></TD>
    <TD STYLE="border-right: Black 1pt solid; padding: 3pt; vertical-align: top; border-bottom: Black 1pt solid">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT STYLE="font-variant: small-caps">Check if the Aggregate
        Amount in Row (11) Excludes Certain Shares</FONT></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>
        <P STYLE="font: 10pt Wingdings; margin: 0pt 0"><FONT STYLE="font-family: Wingdings"><FONT STYLE="font-family: Wingdings">&#168;</FONT></FONT></P></TD></TR>
<TR>
    <TD STYLE="padding: 3pt; border-right: Black 1pt solid; border-bottom: Black 1pt solid; border-left: Black 1pt solid; font-size: 10pt; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 14pt"><B>13</B></FONT></TD>
    <TD STYLE="padding: 3pt; vertical-align: top; border-right: Black 1pt solid; border-bottom: Black 1pt solid">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT STYLE="font-variant: small-caps">Percent of Class&nbsp;Represented
        by Amount in Row (11)</FONT></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">100%</P></TD></TR>
<TR>
    <TD STYLE="padding: 3pt; border-right: Black 1pt solid; border-bottom: Black 1pt solid; border-left: Black 1pt solid; font-size: 10pt; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 14pt"><B>14</B></FONT></TD>
    <TD STYLE="padding: 3pt; vertical-align: top; border-right: Black 1pt solid; border-bottom: Black 1pt solid">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT STYLE="font-variant: small-caps">Type of Reporting Person
        (See Instructions)</FONT></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">CO</P></TD></TR>
</TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"></P>

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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"></P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0"></TD><TD STYLE="width: 0.25in">2</TD><TD>As of March&nbsp;3, 2021, there were 71,306,397 common units of TC Pipelines, LP outstanding.</TD></TR></TABLE>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"></P>

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    <DIV STYLE="break-before: page; margin-top: 6pt; margin-bottom: 12pt"><P STYLE="margin: 0pt">&nbsp;</P></DIV>
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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="text-align: center; font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt"><B>SCHEDULE 13D</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><B>CUSIP No.&nbsp;87233Q 10 8</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
<TR>
    <TD STYLE="padding: 3pt; width: 6%; border: Black 1pt solid; font-size: 10pt; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 14pt"><B>1</B></FONT></TD>
    <TD STYLE="padding: 3pt; vertical-align: top; width: 94%; border-top: Black 1pt solid; border-right: Black 1pt solid; border-bottom: Black 1pt solid">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT STYLE="font-variant: small-caps">Name of Reporting Persons.</FONT></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">TransCanada PipeLine USA Ltd.</P></TD></TR>
<TR>
    <TD STYLE="padding: 3pt; border-right: Black 1pt solid; border-bottom: Black 1pt solid; border-left: Black 1pt solid; font-size: 10pt; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 14pt"><B>2</B></FONT></TD>
    <TD STYLE="padding: 3pt; vertical-align: top; border-right: Black 1pt solid; border-bottom: Black 1pt solid">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT STYLE="font-variant: small-caps">Check the Appropriate
        Box if a Member of a Group</FONT></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">(a)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</FONT><FONT STYLE="font-family: Wingdings"><FONT STYLE="font-family: Wingdings">&#168;</FONT></FONT></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">(b)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</FONT><FONT STYLE="font-family: Wingdings"><FONT STYLE="font-family: Wingdings"><FONT STYLE="font-family: Wingdings">&#168;</FONT></FONT></FONT></P></TD></TR>
<TR>
    <TD STYLE="padding: 3pt; border-right: Black 1pt solid; border-bottom: Black 1pt solid; border-left: Black 1pt solid; font-size: 10pt; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 14pt"><B>3</B></FONT></TD>
    <TD STYLE="padding: 3pt; vertical-align: top; border-right: Black 1pt solid; border-bottom: Black 1pt solid">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">SEC <FONT STYLE="font-variant: small-caps">Use Only</FONT></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P></TD></TR>
<TR>
    <TD STYLE="padding: 3pt; border-right: Black 1pt solid; border-bottom: Black 1pt solid; border-left: Black 1pt solid; font-size: 10pt; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 14pt"><B>4</B></FONT></TD>
    <TD STYLE="padding: 3pt; vertical-align: top; border-right: Black 1pt solid; border-bottom: Black 1pt solid">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT STYLE="font-variant: small-caps">Source of Funds (See
        Instructions)</FONT></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">AF</P></TD></TR>
<TR>
    <TD STYLE="padding: 3pt; border-right: Black 1pt solid; border-bottom: Black 1pt solid; border-left: Black 1pt solid; font-size: 10pt; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 14pt"><B>5</B></FONT></TD>
    <TD STYLE="padding: 3pt; vertical-align: top; border-right: Black 1pt solid; border-bottom: Black 1pt solid">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT STYLE="font-variant: small-caps">Check box if disclosure
        of legal proceedings is required pursuant to Items 2(D)&nbsp;or 2(E)</FONT></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>
        <P STYLE="font: 10pt Wingdings; margin: 0pt 0"><FONT STYLE="font-family: Wingdings">&#168;</FONT></P></TD></TR>
<TR>
    <TD STYLE="border-right: Black 1pt solid; padding: 3pt; border-left: Black 1pt solid; font-size: 10pt; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 14pt"><B>6</B></FONT></TD>
    <TD STYLE="border-right: Black 1pt solid; padding: 3pt; vertical-align: top">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT STYLE="font-variant: small-caps">Citizenship or Place
        of Organization</FONT></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Nevada</P></TD></TR>
</TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"></P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
<TR>
    <TD ROWSPAN="4" STYLE="border-top: Black 1pt solid; padding: 3pt; width: 15%; border-right: Black 1pt solid; border-left: Black 1pt solid; font-size: 10pt; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Number of Shares Beneficially Owned by Each Reporting Person with</FONT></TD>
    <TD STYLE="padding: 3pt; width: 6%; border-top: Black 1pt solid; border-right: Black 1pt solid; border-bottom: Black 1pt solid; font-size: 10pt; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 14pt"><B>7</B></FONT></TD>
    <TD STYLE="padding: 3pt; vertical-align: top; width: 79%; border-top: Black 1pt solid; border-right: Black 1pt solid; border-bottom: Black 1pt solid">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT STYLE="font-variant: small-caps">Sole Voting Power</FONT></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">71,306,397</P></TD></TR>
<TR>
    <TD STYLE="padding: 3pt; border-right: Black 1pt solid; border-bottom: Black 1pt solid; font-size: 10pt; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 14pt"><B>8</B></FONT></TD>
    <TD STYLE="border-right: Black 1pt solid; border-bottom: Black 1pt solid; padding: 3pt; vertical-align: top">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT STYLE="font-variant: small-caps">Shared Voting Power</FONT></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">-0-</P></TD></TR>
<TR>
    <TD STYLE="padding: 3pt; border-right: Black 1pt solid; border-bottom: Black 1pt solid; font-size: 10pt; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 14pt"><B>9</B></FONT></TD>
    <TD STYLE="padding: 3pt; vertical-align: top; border-right: Black 1pt solid; border-bottom: Black 1pt solid">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT STYLE="font-variant: small-caps">Sole Dispositive Power</FONT></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">71,306,397</P></TD></TR>
<TR>
    <TD STYLE="border-right: Black 1pt solid; padding: 3pt; font-size: 10pt; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 14pt"><B>10</B></FONT></TD>
    <TD STYLE="border-right: Black 1pt solid; padding: 3pt; vertical-align: top">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT STYLE="font-variant: small-caps">Shared Dispositive Power</FONT></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">-0-</P></TD></TR>
</TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"></P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
<TR>
    <TD STYLE="padding: 3pt; width: 6%; border: Black 1pt solid; font-size: 10pt; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 14pt"><B>11</B></FONT></TD>
    <TD STYLE="border-top: Black 1pt solid; border-right: Black 1pt solid; border-bottom: Black 1pt solid; padding: 3pt; vertical-align: top; width: 94%">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT STYLE="font-variant: small-caps">Aggregate Amount Beneficially
        Owned by Each Reporting Person</FONT></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">71,306,397</P></TD></TR>
<TR>
    <TD STYLE="padding: 3pt; border-right: Black 1pt solid; border-bottom: Black 1pt solid; border-left: Black 1pt solid; font-size: 10pt; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 14pt"><B>12</B></FONT></TD>
    <TD STYLE="padding: 3pt; vertical-align: top; border-right: Black 1pt solid; border-bottom: Black 1pt solid">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT STYLE="font-variant: small-caps">Check if the Aggregate
        Amount in Row (11) Excludes Certain Shares</FONT></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>
        <P STYLE="font: 10pt Wingdings; margin: 0pt 0"><FONT STYLE="font-family: Wingdings">&#168;</FONT></P></TD></TR>
<TR>
    <TD STYLE="padding: 3pt; border-right: Black 1pt solid; border-bottom: Black 1pt solid; border-left: Black 1pt solid; font-size: 10pt; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 14pt"><B>13</B></FONT></TD>
    <TD STYLE="padding: 3pt; vertical-align: top; border-right: Black 1pt solid; border-bottom: Black 1pt solid">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT STYLE="font-variant: small-caps">Percent of Class&nbsp;Represented
        by Amount in Row (11)</FONT></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">100.0%</P></TD></TR>
<TR>
    <TD STYLE="padding: 3pt; border-right: Black 1pt solid; border-bottom: Black 1pt solid; border-left: Black 1pt solid; font-size: 10pt; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 14pt"><B>14</B></FONT></TD>
    <TD STYLE="padding: 3pt; vertical-align: top; border-right: Black 1pt solid; border-bottom: Black 1pt solid">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT STYLE="font-variant: small-caps">Type of Reporting Person
        (See Instructions)</FONT></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">CO</P></TD></TR>
</TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"></P>

<!-- Field: Rule-Page --><DIV STYLE="margin-top: 0pt; margin-bottom: 0pt; width: 25%"><DIV STYLE="font-size: 1pt; border-top: Black 1pt solid">&nbsp;</DIV></DIV><!-- Field: /Rule-Page -->

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"></P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0"></TD><TD STYLE="width: 0.25in">3</TD><TD>As of March&nbsp;3, 2021, there were 71,306,397 common units of TC Pipelines, LP outstanding.</TD></TR></TABLE>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"></P>

<!-- Field: Page; Sequence: 4; Value: 1 -->
    <DIV STYLE="margin-top: 12pt; margin-bottom: 6pt; border-bottom: Black 1pt solid"><P STYLE="font-size: 10pt; text-align: center; margin-top: 0pt; margin-bottom: 0pt"><!-- Field: Sequence; Type: Arabic; Name: PageNo -->3<!-- Field: /Sequence --></P></DIV>
    <DIV STYLE="break-before: page; margin-top: 6pt; margin-bottom: 12pt"><P STYLE="margin: 0pt">&nbsp;</P></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>SCHEDULE 13D</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><B>CUSIP No.&nbsp;87233Q 10 8</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
<TR>
    <TD STYLE="padding: 3pt; width: 6%; border: Black 1pt solid; font-size: 10pt; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 14pt"><B>1</B></FONT></TD>
    <TD STYLE="padding: 3pt; vertical-align: top; width: 94%; border-top: Black 1pt solid; border-right: Black 1pt solid; border-bottom: Black 1pt solid">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT STYLE="font-variant: small-caps">Name of Reporting Persons.</FONT></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">TransCan Northern Ltd.</P></TD></TR>
<TR>
    <TD STYLE="padding: 3pt; border-right: Black 1pt solid; border-bottom: Black 1pt solid; border-left: Black 1pt solid; font-size: 10pt; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 14pt"><B>2</B></FONT></TD>
    <TD STYLE="padding: 3pt; vertical-align: top; border-right: Black 1pt solid; border-bottom: Black 1pt solid">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT STYLE="font-variant: small-caps">Check the Appropriate
        Box if a Member of a Group</FONT></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">(a)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</FONT><FONT STYLE="font-family: Wingdings"><FONT STYLE="font-family: Wingdings">&#168;</FONT></FONT></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">(b)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</FONT><FONT STYLE="font-family: Wingdings"><FONT STYLE="font-family: Wingdings">&#168;</FONT></FONT></P></TD></TR>
<TR>
    <TD STYLE="padding: 3pt; border-right: Black 1pt solid; border-bottom: Black 1pt solid; border-left: Black 1pt solid; font-size: 10pt; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 14pt"><B>3</B></FONT></TD>
    <TD STYLE="padding: 3pt; vertical-align: top; border-right: Black 1pt solid; border-bottom: Black 1pt solid">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">SEC <FONT STYLE="font-variant: small-caps">Use Only</FONT></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P></TD></TR>
<TR>
    <TD STYLE="padding: 3pt; border-right: Black 1pt solid; border-bottom: Black 1pt solid; border-left: Black 1pt solid; font-size: 10pt; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 14pt"><B>4</B></FONT></TD>
    <TD STYLE="padding: 3pt; vertical-align: top; border-right: Black 1pt solid; border-bottom: Black 1pt solid">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT STYLE="font-variant: small-caps">Source of Funds (See
        Instructions)</FONT></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">AF</P></TD></TR>
<TR>
    <TD STYLE="padding: 3pt; border-right: Black 1pt solid; border-bottom: Black 1pt solid; border-left: Black 1pt solid; font-size: 10pt; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 14pt"><B>5</B></FONT></TD>
    <TD STYLE="padding: 3pt; vertical-align: top; border-right: Black 1pt solid; border-bottom: Black 1pt solid">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT STYLE="font-variant: small-caps">Check box if disclosure
        of legal proceedings is required pursuant to Items 2(D)&nbsp;or 2(E)</FONT></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>
        <P STYLE="font: 10pt Wingdings; margin: 0pt 0"><FONT STYLE="font-family: Wingdings">&#168;</FONT></P></TD></TR>
<TR>
    <TD STYLE="border-right: Black 1pt solid; padding: 3pt; border-left: Black 1pt solid; font-size: 10pt; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 14pt"><B>6</B></FONT></TD>
    <TD STYLE="border-right: Black 1pt solid; padding: 3pt; vertical-align: top">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT STYLE="font-variant: small-caps">Citizenship or Place
        of Organization</FONT></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Delaware</P></TD></TR>
</TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"></P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
<TR>
    <TD ROWSPAN="4" STYLE="border-top: Black 1pt solid; padding: 3pt; width: 15%; border-right: Black 1pt solid; border-left: Black 1pt solid; font-size: 10pt; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Number of Shares Beneficially Owned by Each Reporting Person with</FONT></TD>
    <TD STYLE="padding: 3pt; width: 6%; border-top: Black 1pt solid; border-right: Black 1pt solid; border-bottom: Black 1pt solid; font-size: 10pt; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 14pt"><B>7</B></FONT></TD>
    <TD STYLE="padding: 3pt; vertical-align: top; width: 79%; border-top: Black 1pt solid; border-right: Black 1pt solid; border-bottom: Black 1pt solid">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT STYLE="font-variant: small-caps">Sole Voting Power</FONT></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">71,306,397</P></TD></TR>
<TR>
    <TD STYLE="padding: 3pt; border-right: Black 1pt solid; border-bottom: Black 1pt solid; font-size: 10pt; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 14pt"><B>8</B></FONT></TD>
    <TD STYLE="padding: 3pt; vertical-align: top; border-right: Black 1pt solid; border-bottom: Black 1pt solid">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT STYLE="font-variant: small-caps">Shared Voting Power</FONT></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">-0-</P></TD></TR>
<TR>
    <TD STYLE="padding: 3pt; border-right: Black 1pt solid; border-bottom: Black 1pt solid; font-size: 10pt; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 14pt"><B>9</B></FONT></TD>
    <TD STYLE="padding: 3pt; vertical-align: top; border-right: Black 1pt solid; border-bottom: Black 1pt solid">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT STYLE="font-variant: small-caps">Sole Dispositive Power</FONT></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">71,306,397</P></TD></TR>
<TR>
    <TD STYLE="border-right: Black 1pt solid; padding: 3pt; font-size: 10pt; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 14pt"><B>10</B></FONT></TD>
    <TD STYLE="border-right: Black 1pt solid; padding: 3pt; vertical-align: top">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT STYLE="font-variant: small-caps">Shared Dispositive Power</FONT></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">-0-</P></TD></TR>
</TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"></P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
<TR>
    <TD STYLE="border: Black 1pt solid; padding: 3pt; width: 6%; font-size: 10pt; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 14pt"><B>11</B></FONT></TD>
    <TD STYLE="border-top: Black 1pt solid; border-right: Black 1pt solid; border-bottom: Black 1pt solid; padding: 3pt; vertical-align: top; width: 94%">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT STYLE="font-variant: small-caps">Aggregate Amount Beneficially
        Owned by Each Reporting Person</FONT></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">71,306,397</P></TD></TR>
<TR>
    <TD STYLE="border-right: Black 1pt solid; border-bottom: Black 1pt solid; border-left: Black 1pt solid; padding: 3pt; font-size: 10pt; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 14pt"><B>12</B></FONT></TD>
    <TD STYLE="border-right: Black 1pt solid; border-bottom: Black 1pt solid; padding: 3pt; vertical-align: top">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT STYLE="font-variant: small-caps">Check if the Aggregate
        Amount in Row (11) Excludes Certain Shares</FONT></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>
        <P STYLE="font: 10pt Wingdings; margin: 0pt 0"><FONT STYLE="font-family: Wingdings">&#168;</FONT></P></TD></TR>
<TR>
    <TD STYLE="border-right: Black 1pt solid; border-bottom: Black 1pt solid; border-left: Black 1pt solid; padding: 3pt; font-size: 10pt; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 14pt"><B>13</B></FONT></TD>
    <TD STYLE="border-right: Black 1pt solid; border-bottom: Black 1pt solid; padding: 3pt; vertical-align: top">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT STYLE="font-variant: small-caps">Percent of Class&nbsp;Represented
        by Amount in Row (11)</FONT></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">100%</P></TD></TR>
<TR>
    <TD STYLE="border-right: Black 1pt solid; border-bottom: Black 1pt solid; border-left: Black 1pt solid; padding: 3pt; font-size: 10pt; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 14pt"><B>14</B></FONT></TD>
    <TD STYLE="border-right: Black 1pt solid; border-bottom: Black 1pt solid; padding: 3pt; vertical-align: top">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT STYLE="font-variant: small-caps">Type of Reporting Person
        (See Instructions)</FONT></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">CO</P></TD></TR>
</TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"></P>

<!-- Field: Rule-Page --><DIV STYLE="margin-top: 0pt; margin-bottom: 0pt; width: 25%"><DIV STYLE="font-size: 1pt; border-top: Black 1pt solid">&nbsp;</DIV></DIV><!-- Field: /Rule-Page -->

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"></P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0"></TD><TD STYLE="width: 0.25in">4</TD><TD>As of March&nbsp;3, 2021, there were 71,306,397 common units of TC Pipelines, LP outstanding.</TD></TR></TABLE>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"></P>

<!-- Field: Page; Sequence: 5; Value: 1 -->
    <DIV STYLE="margin-top: 12pt; margin-bottom: 6pt; border-bottom: Black 1pt solid"><P STYLE="font-size: 10pt; text-align: center; margin-top: 0pt; margin-bottom: 0pt"><!-- Field: Sequence; Type: Arabic; Name: PageNo -->4<!-- Field: /Sequence --></P></DIV>
    <DIV STYLE="break-before: page; margin-top: 6pt; margin-bottom: 12pt"><P STYLE="margin: 0pt">&nbsp;</P></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="text-align: center; font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt"><B>SCHEDULE 13D</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><B>CUSIP No.&nbsp;87233Q 10 8</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
<TR>
    <TD STYLE="padding: 3pt; width: 6%; border: Black 1pt solid; font-size: 10pt; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 14pt"><B>1</B></FONT></TD>
    <TD STYLE="padding: 3pt; vertical-align: top; width: 94%; border-top: Black 1pt solid; border-right: Black 1pt solid; border-bottom: Black 1pt solid">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT STYLE="font-variant: small-caps">Name of Reporting Persons.</FONT></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">TC PipeLines GP,&nbsp;Inc.</P></TD></TR>
<TR>
    <TD STYLE="padding: 3pt; border-right: Black 1pt solid; border-bottom: Black 1pt solid; border-left: Black 1pt solid; font-size: 10pt; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 14pt"><B>2</B></FONT></TD>
    <TD STYLE="padding: 3pt; vertical-align: top; border-right: Black 1pt solid; border-bottom: Black 1pt solid">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT STYLE="font-variant: small-caps">Check the Appropriate
        Box if a Member of a Group</FONT></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">(a)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</FONT><FONT STYLE="font-family: Wingdings"><FONT STYLE="font-family: Wingdings">&#168;</FONT></FONT></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">(b)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</FONT><FONT STYLE="font-family: Wingdings"><FONT STYLE="font-family: Wingdings">&#168;</FONT></FONT></P></TD></TR>
<TR>
    <TD STYLE="padding: 3pt; border-right: Black 1pt solid; border-bottom: Black 1pt solid; border-left: Black 1pt solid; font-size: 10pt; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 14pt"><B>3</B></FONT></TD>
    <TD STYLE="padding: 3pt; vertical-align: top; border-right: Black 1pt solid; border-bottom: Black 1pt solid">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">SEC <FONT STYLE="font-variant: small-caps">Use Only</FONT></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P></TD></TR>
<TR>
    <TD STYLE="padding: 3pt; border-right: Black 1pt solid; border-bottom: Black 1pt solid; border-left: Black 1pt solid; font-size: 10pt; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 14pt"><B>4</B></FONT></TD>
    <TD STYLE="padding: 3pt; vertical-align: top; border-right: Black 1pt solid; border-bottom: Black 1pt solid">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT STYLE="font-variant: small-caps">Source of Funds (See
        Instructions)</FONT></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">AF</P></TD></TR>
<TR>
    <TD STYLE="padding: 3pt; border-right: Black 1pt solid; border-bottom: Black 1pt solid; border-left: Black 1pt solid; font-size: 10pt; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 14pt"><B>5</B></FONT></TD>
    <TD STYLE="padding: 3pt; vertical-align: top; border-right: Black 1pt solid; border-bottom: Black 1pt solid">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT STYLE="font-variant: small-caps">Check box if disclosure
        of legal proceedings is required pursuant to Items 2(D)&nbsp;or 2(E)</FONT></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>
        <P STYLE="font: 10pt Wingdings; margin: 0pt 0"><FONT STYLE="font-family: Wingdings">&#168;</FONT></P></TD></TR>
<TR>
    <TD STYLE="border-right: Black 1pt solid; padding: 3pt; border-left: Black 1pt solid; font-size: 10pt; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 14pt"><B>6</B></FONT></TD>
    <TD STYLE="border-right: Black 1pt solid; padding: 3pt; vertical-align: top">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT STYLE="font-variant: small-caps">Citizenship or Place
        of Organization</FONT></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Delaware</P></TD></TR>
</TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"></P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
<TR>
    <TD ROWSPAN="4" STYLE="border-top: Black 1pt solid; padding: 3pt; width: 15%; border-right: Black 1pt solid; border-left: Black 1pt solid; font-size: 10pt; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Number of Shares Beneficially Owned by Each Reporting Person with</FONT></TD>
    <TD STYLE="padding: 3pt; width: 6%; border-top: Black 1pt solid; border-right: Black 1pt solid; border-bottom: Black 1pt solid; font-size: 10pt; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 14pt"><B>7</B></FONT></TD>
    <TD STYLE="padding: 3pt; vertical-align: top; width: 79%; border-top: Black 1pt solid; border-right: Black 1pt solid; border-bottom: Black 1pt solid">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT STYLE="font-variant: small-caps">Sole Voting Power</FONT></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">5,797,106</P></TD></TR>
<TR>
    <TD STYLE="padding: 3pt; border-right: Black 1pt solid; border-bottom: Black 1pt solid; font-size: 10pt; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 14pt"><B>8</B></FONT></TD>
    <TD STYLE="padding: 3pt; vertical-align: top; border-right: Black 1pt solid; border-bottom: Black 1pt solid">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT STYLE="font-variant: small-caps">Shared Voting Power</FONT></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">-0-</P></TD></TR>
<TR>
    <TD STYLE="padding: 3pt; border-right: Black 1pt solid; border-bottom: Black 1pt solid; font-size: 10pt; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 14pt"><B>9</B></FONT></TD>
    <TD STYLE="padding: 3pt; vertical-align: top; border-right: Black 1pt solid; border-bottom: Black 1pt solid">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT STYLE="font-variant: small-caps">Sole Dispositive Power</FONT></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">5,797,106</P></TD></TR>
<TR>
    <TD STYLE="border-right: Black 1pt solid; padding: 3pt; font-size: 10pt; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 14pt"><B>10</B></FONT></TD>
    <TD STYLE="border-right: Black 1pt solid; padding: 3pt; vertical-align: top">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT STYLE="font-variant: small-caps">Shared Dispositive Power</FONT></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">-0-</P></TD></TR>
</TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"></P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
<TR>
    <TD STYLE="padding: 3pt; width: 6%; border: Black 1pt solid; font-size: 10pt; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 14pt"><B>11</B></FONT></TD>
    <TD STYLE="padding: 3pt; vertical-align: top; width: 94%; border-top: Black 1pt solid; border-right: Black 1pt solid; border-bottom: Black 1pt solid">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT STYLE="font-variant: small-caps">Aggregate Amount Beneficially
        Owned by Each Reporting Person</FONT></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">5,797,106</P></TD></TR>
<TR>
    <TD STYLE="padding: 3pt; border-right: Black 1pt solid; border-bottom: Black 1pt solid; border-left: Black 1pt solid; font-size: 10pt; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 14pt"><B>12</B></FONT></TD>
    <TD STYLE="padding: 3pt; vertical-align: top; border-right: Black 1pt solid; border-bottom: Black 1pt solid">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT STYLE="font-variant: small-caps">Check if the Aggregate
        Amount in Row (11) Excludes Certain Shares</FONT></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>
        <P STYLE="font: 10pt Wingdings; margin: 0pt 0"><FONT STYLE="font-family: Wingdings">&#168;</FONT></P></TD></TR>
<TR>
    <TD STYLE="padding: 3pt; border-right: Black 1pt solid; border-bottom: Black 1pt solid; border-left: Black 1pt solid; font-size: 10pt; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 14pt"><B>13</B></FONT></TD>
    <TD STYLE="padding: 3pt; vertical-align: top; border-right: Black 1pt solid; border-bottom: Black 1pt solid">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT STYLE="font-variant: small-caps">Percent of Class&nbsp;Represented
        by Amount in Row (11)</FONT></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">8.1%</P></TD></TR>
<TR>
    <TD STYLE="padding: 3pt; border-right: Black 1pt solid; border-bottom: Black 1pt solid; border-left: Black 1pt solid; font-size: 10pt; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 14pt"><B>14</B></FONT></TD>
    <TD STYLE="padding: 3pt; vertical-align: top; border-right: Black 1pt solid; border-bottom: Black 1pt solid">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT STYLE="font-variant: small-caps">Type of Reporting Person
        (See Instructions)</FONT></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">CO</P></TD></TR>
</TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"></P>

<!-- Field: Rule-Page --><DIV STYLE="margin-top: 0pt; margin-bottom: 0pt; width: 25%"><DIV STYLE="font-size: 1pt; border-top: Black 1pt solid">&nbsp;</DIV></DIV><!-- Field: /Rule-Page -->

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"></P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0"></TD><TD STYLE="width: 0.25in">5</TD><TD>As of March&nbsp;3, 2021, there were 71,306,397 common units of TC Pipelines, LP outstanding.</TD></TR></TABLE>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"></P>

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    <DIV STYLE="break-before: page; margin-top: 6pt; margin-bottom: 12pt"><P STYLE="margin: 0pt">&nbsp;</P></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>AMENDMENT NO. 8 TO</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>STATEMENT ON SCHEDULE 13D</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.25in">This Amendment No.&nbsp;8 (the &ldquo;Amendment&rdquo;)
to Schedule 13D is being filed by TC Energy Corporation, a Canadian public company (&ldquo;TC Energy&rdquo;), TransCanada PipeLines
Limited, a Canadian corporation (&ldquo;TCPL&rdquo;), TransCanada PipeLine USA Ltd., a Nevada Corporation (&ldquo;TC PipeLine USA&rdquo;),
TransCan Northern Ltd., a Delaware corporation (&ldquo;TransCan Northern&rdquo;) and TC PipeLines GP,&nbsp;Inc., a Delaware corporation
(the &ldquo;GP&rdquo;), to amend the Schedule 13D that was filed on August&nbsp;9, 2002, as amended by Amendment No.&nbsp;1 filed
on August&nbsp;13, 2003, Amendment No.&nbsp;2 filed on August&nbsp;3, 2004, Amendment No.&nbsp;3 filed on April&nbsp;1, 2005, Amendment
No.&nbsp;4 filed on March&nbsp;29, 2007, Amendment No.&nbsp;5 filed on July&nbsp;2, 2009, Amendment No.&nbsp;6 filed on October&nbsp;5,
2020 and Amendment No.&nbsp;7 filed on December&nbsp;16, 2020. <FONT STYLE="background-color: white">Capitalized terms used in
this Amendment No.&nbsp;8 and not defined herein have the respective meanings ascribed to such terms in the Schedule 13D, as previously
amended.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0"></TD><TD STYLE="width: 1in"><B>Item 2.</B></TD><TD><B>Identity and Background.</B></TD></TR></TABLE>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.25in">The name, state or other place of organization
and address of its principal office for the Reporting Persons are set forth on Schedule I attached hereto.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.25in">(a)-(c)&#9;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The
information required to be filed in response to paragraphs (a), (b)&nbsp;and (c)&nbsp;of Item 2 with respect to the persons listed
on Appendices A, B, C, D and E (the &ldquo;Listed Persons&rdquo;) hereto is set forth therein. On March&nbsp;3, 2021, following
the consummation of, and as a result of, the Merger (as defined below), the Listed Persons ceased to beneficially own any Common
Units of the Partnership.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.25in">(d)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;During
the last five years, none of the Reporting Persons nor, to the knowledge of the Reporting Persons, none of the Listed Persons has
been convicted in a criminal proceeding (excluding traffic violations or similar misdemeanors).</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.25in">(e)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;During
the last five years, none of the Reporting Persons nor, to the knowledge of the Reporting Persons, any of the Listed Persons has
been a party to a civil proceeding of a judicial or administrative body of competent jurisdiction as a result of which any of such
persons was or is subject to a judgment, decree or final order enjoining future violations of, or prohibiting or mandating activities
subject to, federal or state securities laws or finding any violation with respect to such laws.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.25in">(f)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The
information required to be filed in response to paragraph (f)&nbsp;of Item 2 with respect to the Listed Persons is set forth therein.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0"></TD><TD STYLE="width: 1in"><B>Item 4.</B></TD><TD><B>Purpose of Transaction</B></TD></TR></TABLE>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.25in">The information previously provided in
response to this Item 4 is hereby amended and supplemented as follows:</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.25in">On March&nbsp;3, 2021, TCP Merger Sub,
LLC, a Delaware limited liability company and an indirect, wholly owned subsidiary of TC Energy (&ldquo;Merger Sub&rdquo;), merged
with and into the Partnership, with the Partnership continuing as the sole surviving entity and an indirect, wholly owned subsidiary
of TC Energy (the &ldquo;Merger&rdquo;) pursuant to that certain Agreement and Plan of Merger, dated as of December&nbsp;14, 2020
(the &ldquo;Merger Agreement&rdquo;), by and among the Partnership, the GP, TC Energy, TransCan Northern, TC PipeLine USA&nbsp;and
Merger Sub.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.25in">As a result of the Merger, (i)&nbsp;each
Common Unit issued and outstanding immediately prior to the effective time of the Merger (excluding certain Excluded Units, as
defined in the Merger Agreement) was cancelled in exchange for the right to receive from TC Energy 0.70 common shares of TC Energy
and the Partnership issued a number of Common Units equal to the number of Common Units cancelled in connection with the Merger
to TransCan Northern and (ii)&nbsp;the equity interests of Merger Sub were converted into one newly issued Common Unit held by
TransCan Northern. As a result of the Merger, the Reporting Persons own all of the outstanding Common Units.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.25in">The Common Units will be removed from listing
on the New York Stock Exchange and the Partnership will file a Form&nbsp;15 to terminate the registration of the Common Units under
Section&nbsp;12(g)&nbsp;and suspend its reporting obligations under Section&nbsp;15(d), in each case, under the Securities Exchange
Act of 1934, as amended (the &ldquo;Exchange Act&rdquo;).</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0in"></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0in"></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0in"></P>


<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0in"></P>

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    <DIV STYLE="break-before: page; margin-top: 6pt; margin-bottom: 12pt"><P STYLE="margin: 0pt">&nbsp;</P></DIV>
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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0in">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0"></TD><TD STYLE="width: 1in"><B>Item 5.</B></TD><TD><B>Interest in Securities of the Issuer.</B></TD></TR></TABLE>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.25in">Item 5 of the Schedule 13D is hereby amended
by adding the following paragraph:</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.25in">As a result of the Merger described in
Item 4 (which Item 4 is incorporated herein by reference), the Reporting Persons own all of the outstanding Common Units. Following
effectiveness of the Form&nbsp;15, Common Units held by TC Energy and its subsidiaries will no longer be subject to reporting under
Section&nbsp;13(d)&nbsp;of the Exchange Act. Consequently, this Amendment No.&nbsp;8 to the Original Schedule 13D constitutes an
exit filing for the Reporting Persons.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0"></TD><TD STYLE="width: 1in"><B>Item 6.</B></TD><TD><B>Contracts, Arrangements, Understandings or Relationships with Respect to Securities of the Issuer</B></TD></TR></TABLE>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.25in">The information provided or incorporated
by reference in Item 4 is hereby incorporated by reference herein.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"></P>


<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"></P>

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    <DIV STYLE="break-before: page; margin-top: 6pt; margin-bottom: 12pt"><P STYLE="margin: 0pt">&nbsp;</P></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>SIGNATURE</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.25in">After reasonable inquiry and to the best
of our knowledge and belief, the undersigned certify that the information set forth in this statement is true, complete and correct.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Date:&#9;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;March&nbsp;3, 2021</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; width: 100%">
<TR STYLE="vertical-align: bottom">
    <TD STYLE="font: bold 10pt Times New Roman, Times, Serif; width: 50%">&nbsp;</TD>
    <TD STYLE="font: bold 10pt Times New Roman, Times, Serif; width: 50%">TC Energy Corporation</TD></TR>
</TABLE>


<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; width: 100%">
<TR STYLE="vertical-align: bottom">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; width: 50%">&nbsp;</TD>
    <TD STYLE="border-bottom: Black 1pt solid; font: 10pt Times New Roman, Times, Serif; width: 50%">/s/ Donald R. Marchand</TD></TR>
</TABLE>


<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"></P>

<TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; width: 100%">
<TR STYLE="vertical-align: bottom">
    <TD STYLE="width: 50%; font: 10pt Times New Roman, Times, Serif; padding-left: 3in"></TD><TD STYLE="width: 5%; font: 10pt Times New Roman, Times, Serif">Name:</TD>
    <TD STYLE="width: 45%; font: 10pt Times New Roman, Times, Serif; text-align: left">&nbsp;&nbsp;&nbsp;Donald R. Marchand</TD></TR>
<TR STYLE="vertical-align: bottom">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; padding-left: 3in">&nbsp;</TD><TD STYLE="vertical-align: top; font: 10pt Times New Roman, Times, Serif; text-align: left">Title:</TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: left">&nbsp;&nbsp;&nbsp;Executive Vice-President, Strategy&nbsp;&amp; Corporate Development and &nbsp;&nbsp;&nbsp;Chief Financial Officer</TD></TR>
</TABLE>


<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; width: 100%"><TR STYLE="vertical-align: bottom"><TD STYLE="font: 10pt Times New Roman, Times, Serif; width: 50%"></TD>
    <TD STYLE="border-bottom: Black 1pt solid; font: 10pt Times New Roman, Times, Serif; width: 50%">/s/ Christine R. Johnston</TD></TR>
</TABLE>


<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"></P>

<TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; width: 100%">
<TR STYLE="vertical-align: bottom">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; width: 50%; padding-left: 3in"></TD><TD STYLE="font: 10pt Times New Roman, Times, Serif; width: 5%">Name:</TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; width: 45%; text-align: left">&nbsp;&nbsp;&nbsp;Christine R.
Johnston</TD></TR>
<TR STYLE="vertical-align: bottom">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; padding-left: 3in">&nbsp;</TD><TD STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top; text-align: left">Title:</TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: left">&nbsp;&nbsp;&nbsp;Vice-President,
Law and Corporate Secretary</TD></TR></TABLE>


<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 3in"></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; width: 100%"><TR STYLE="vertical-align: bottom"><TD STYLE="font: bold 10pt Times New Roman, Times, Serif; width: 50%"></TD>
    <TD STYLE="font: bold 10pt Times New Roman, Times, Serif; width: 50%"><B>TransCanada PipeLines Limited</B></TD></TR>
</TABLE>


<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; width: 100%">
<TR STYLE="vertical-align: bottom">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; width: 50%">&nbsp;</TD>
    <TD STYLE="border-bottom: Black 1pt solid; font: 10pt Times New Roman, Times, Serif; width: 50%">/s/ Donald R. Marchand</TD></TR>
</TABLE>


<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"></P>

<TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; width: 100%">
<TR STYLE="vertical-align: bottom">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; width: 50%; padding-left: 3in"></TD><TD STYLE="font: 10pt Times New Roman, Times, Serif; width: 5%">Name:</TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; width: 45%; text-align: left">&nbsp;&nbsp;&nbsp;Donald R. Marchand</TD></TR>
<TR STYLE="vertical-align: bottom">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; padding-left: 3in">&nbsp;</TD><TD STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top; text-align: left">Title:</TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: left">&nbsp;&nbsp;&nbsp;Executive Vice-President, Strategy&nbsp;&amp; Corporate Development and &nbsp;&nbsp;&nbsp;Chief Financial Officer</TD></TR></TABLE>


<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 3in"></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; width: 100%"><TR STYLE="vertical-align: bottom"><TD STYLE="font: 10pt Times New Roman, Times, Serif; width: 50%"></TD>
    <TD STYLE="border-bottom: Black 1pt solid; font: 10pt Times New Roman, Times, Serif; width: 50%">/s/ Christine R. Johnston</TD></TR>
</TABLE>


<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"></P>

<TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; width: 100%">
<TR STYLE="vertical-align: bottom">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; width: 50%; padding-left: 3in"></TD><TD STYLE="font: 10pt Times New Roman, Times, Serif; width: 5%">Name:</TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; width: 45%; text-align: left">&nbsp;&nbsp;&nbsp;Christine R.
Johnston</TD></TR>
<TR STYLE="vertical-align: bottom">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; padding-left: 3in">&nbsp;</TD><TD STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top; text-align: left">Title:</TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: left">&nbsp;&nbsp;&nbsp;Vice-President,
Law and Corporate Secretary</TD></TR></TABLE>


<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 3in"></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"></P>

<TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; width: 100%">
<TR STYLE="vertical-align: bottom">
    <TD STYLE="font: bold 10pt Times New Roman, Times, Serif; width: 50%">&nbsp;</TD>
    <TD STYLE="font: bold 10pt Times New Roman, Times, Serif; width: 50%"><B>TransCanada PipeLine USA Ltd.</B></TD></TR>
</TABLE>


<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; width: 100%">
<TR STYLE="vertical-align: bottom">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; width: 50%">&nbsp;</TD>
    <TD STYLE="border-bottom: Black 1pt solid; font: 10pt Times New Roman, Times, Serif; width: 50%">/s/ Nathaniel A. Brown</TD></TR>
</TABLE>


<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"></P>

<TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; width: 100%">
<TR STYLE="vertical-align: bottom">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; width: 50%; padding-left: 3in"></TD><TD STYLE="font: 10pt Times New Roman, Times, Serif; width: 5%">Name:</TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; width: 45%; text-align: left">&nbsp;&nbsp;&nbsp;Nathaniel A.
Brown</TD></TR>
<TR STYLE="vertical-align: bottom">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; padding-left: 3in">&nbsp;</TD><TD STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top; text-align: left">Title:</TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: left">&nbsp;&nbsp;&nbsp;Controller</TD></TR>
</TABLE>


<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; width: 100%">
<TR STYLE="vertical-align: bottom">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; width: 50%">&nbsp;</TD>
    <TD STYLE="border-bottom: Black 1pt solid; font: 10pt Times New Roman, Times, Serif; width: 50%">/s/ Jon A. Dobson</TD></TR>
</TABLE>


<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"></P>

<TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; width: 100%">
<TR STYLE="vertical-align: bottom">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; width: 50%; padding-left: 3in"></TD><TD STYLE="font: 10pt Times New Roman, Times, Serif; width: 5%">Name:</TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; width: 45%; text-align: left">&nbsp;&nbsp;&nbsp;Jon A. Dobson</TD></TR>
<TR STYLE="vertical-align: bottom">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; padding-left: 3in">&nbsp;</TD><TD STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top; text-align: left">Title:</TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: left">&nbsp;&nbsp;&nbsp;Corporate Secretary</TD></TR>
</TABLE>


<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"></P>

<TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; width: 100%">
<TR STYLE="vertical-align: bottom">
    <TD STYLE="font: bold 10pt Times New Roman, Times, Serif; width: 50%">&nbsp;</TD>
    <TD STYLE="font: bold 10pt Times New Roman, Times, Serif; width: 50%">TransCan Northern Ltd.</TD></TR>
</TABLE>


<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; width: 100%">
<TR STYLE="vertical-align: bottom">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; width: 50%">&nbsp;</TD>
    <TD STYLE="border-bottom: Black 1pt solid; font: 10pt Times New Roman, Times, Serif; width: 50%">/s/ Nathaniel A. Brown</TD></TR>
</TABLE>


<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"></P>

<TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; width: 100%">
<TR STYLE="vertical-align: bottom">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; width: 50%; padding-left: 3in"></TD><TD STYLE="font: 10pt Times New Roman, Times, Serif; width: 5%">Name:</TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; width: 45%; text-align: left">&nbsp;&nbsp;&nbsp;Nathaniel A.
Brown</TD></TR>
<TR STYLE="vertical-align: bottom">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; padding-left: 3in">&nbsp;</TD><TD STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top; text-align: left">Title:</TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: left">&nbsp;&nbsp;&nbsp;Controller</TD></TR>
</TABLE>


<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; width: 100%">
<TR STYLE="vertical-align: bottom">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; width: 50%">&nbsp;</TD>
    <TD STYLE="border-bottom: Black 1pt solid; font: 10pt Times New Roman, Times, Serif; width: 50%">/s/ Jon A. Dobson</TD></TR>
</TABLE>


<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"></P>

<TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; width: 100%">
<TR STYLE="vertical-align: bottom">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; width: 50%; padding-left: 3in"></TD><TD STYLE="font: 10pt Times New Roman, Times, Serif; width: 5%">Name:</TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; width: 45%; text-align: left">&nbsp;&nbsp;&nbsp;Jon A. Dobson</TD></TR>
<TR STYLE="vertical-align: bottom">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; padding-left: 3in">&nbsp;</TD><TD STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top; text-align: left">Title:</TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: left">&nbsp;&nbsp;&nbsp;Corporate Secretary</TD></TR>
</TABLE>


<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>


<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 3in"></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"></P>

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    <DIV STYLE="break-before: page; margin-top: 6pt; margin-bottom: 12pt"><P STYLE="margin: 0pt">&nbsp;</P></DIV>
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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"></P>

<TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; width: 100%">
<TR STYLE="vertical-align: bottom">
    <TD STYLE="font: bold 10pt Times New Roman, Times, Serif; width: 50%">&nbsp;</TD>
    <TD STYLE="font: bold 10pt Times New Roman, Times, Serif; width: 50%"><B>TC PipeLines GP,&nbsp;Inc.</B></TD></TR>
</TABLE>


<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; width: 100%">
<TR STYLE="vertical-align: bottom">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; width: 50%">&nbsp;</TD>
    <TD STYLE="border-bottom: Black 1pt solid; font: 10pt Times New Roman, Times, Serif; width: 50%">/s/ Nathaniel A. Brown</TD></TR>
</TABLE>


<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"></P>

<TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; width: 100%">
<TR STYLE="vertical-align: bottom">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; width: 50%; padding-left: 3in"></TD><TD STYLE="font: 10pt Times New Roman, Times, Serif; width: 5%">Name:</TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; width: 45%; text-align: left">&nbsp;&nbsp;&nbsp;Nathaniel A.
Brown</TD></TR>
<TR STYLE="vertical-align: bottom">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; padding-left: 3in">&nbsp;</TD><TD STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top; text-align: left">Title:</TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: left">&nbsp;&nbsp;&nbsp;President</TD></TR>
</TABLE>


<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; width: 100%">
<TR STYLE="vertical-align: bottom">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; width: 50%">&nbsp;</TD>
    <TD STYLE="border-bottom: Black 1pt solid; font: 10pt Times New Roman, Times, Serif; width: 50%">/s/ Jon A. Dobson</TD></TR>
</TABLE>


<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"></P>

<TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; width: 100%">
<TR STYLE="vertical-align: bottom">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; width: 50%; padding-left: 3in"></TD><TD STYLE="font: 10pt Times New Roman, Times, Serif; width: 5%">Name:</TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; width: 45%; text-align: left">&nbsp;&nbsp;&nbsp;Jon A. Dobson</TD></TR>
<TR STYLE="vertical-align: bottom">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; padding-left: 3in">&nbsp;</TD><TD STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top; text-align: left">Title:</TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: left">&nbsp;&nbsp;&nbsp;Secretary</TD></TR>
</TABLE>


<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"></P>

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    <DIV STYLE="break-before: page; margin-top: 6pt; margin-bottom: 12pt"><P STYLE="margin: 0pt">&nbsp;</P></DIV>
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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>SCHEDULE I</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="width: 100%; font: 10pt Times New Roman, Times, Serif; border-collapse: collapse">
<TR STYLE="vertical-align: top">
    <TD STYLE="vertical-align: bottom; width: 23%; text-align: left">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center; border-bottom: Black 0.5pt solid"><B>Name</B></P></TD>
    <TD STYLE="width: 1%">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom; width: 23%; text-align: left">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center; border-bottom: Black 0.5pt solid"><B>State
        of Incorporation<BR>
 or Formation</B></P></TD>
    <TD STYLE="width: 1%">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom; width: 23%; text-align: left">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center; border-bottom: Black 0.5pt solid"><B>Principal
        Business</B></P></TD>
    <TD STYLE="width: 1%">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom; width: 28%; text-align: left">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center; border-bottom: Black 0.5pt solid"><B>Business
        Address</B></P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="font-size: 10pt"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">TC Energy Corporation</FONT></TD>
    <TD>&nbsp;</TD>
    <TD STYLE="font-size: 10pt"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Canada</FONT></TD>
    <TD>&nbsp;</TD>
    <TD STYLE="font-size: 10pt"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Pipelines and Energy</FONT></TD>
    <TD>&nbsp;</TD>
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">TC Energy Tower</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">450 - 1st Street SW</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Calgary, Alberta, Canada</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">T2P 5H1</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Phone:&#9;(403) 920-2000</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="font-size: 10pt"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">TransCanada PipeLines Limited</FONT></TD>
    <TD>&nbsp;</TD>
    <TD STYLE="font-size: 10pt"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Canada</FONT></TD>
    <TD>&nbsp;</TD>
    <TD STYLE="font-size: 10pt"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Pipelines and Energy</FONT></TD>
    <TD>&nbsp;</TD>
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">TC Energy Tower</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">450 - 1st Street SW</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Calgary, Alberta, Canada</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">T2P 5H1</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Phone:&#9;(403) 920-2000</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="font-size: 10pt"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">TransCanada PipeLine USA Ltd.</FONT></TD>
    <TD>&nbsp;</TD>
    <TD STYLE="font-size: 10pt"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Nevada</FONT></TD>
    <TD>&nbsp;</TD>
    <TD STYLE="font-size: 10pt"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Pipelines and Energy</FONT></TD>
    <TD>&nbsp;</TD>
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">700 Louisiana Street, Suite&nbsp;1300</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Houston, Texas</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">77002-2761</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Phone:&#9;(877) 290-2772</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="font-size: 10pt"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">TransCan Northern Ltd.</FONT></TD>
    <TD>&nbsp;</TD>
    <TD STYLE="font-size: 10pt"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Delaware</FONT></TD>
    <TD>&nbsp;</TD>
    <TD STYLE="font-size: 10pt"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Pipelines and Energy</FONT></TD>
    <TD>&nbsp;</TD>
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">700 Louisiana Street, Suite&nbsp;1300</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Houston, Texas</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">77002-2761</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Phone:&#9;(877) 290-2772</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="font-size: 10pt"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">TC PipeLines GP,&nbsp;Inc.</FONT></TD>
    <TD>&nbsp;</TD>
    <TD STYLE="font-size: 10pt"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Delaware</FONT></TD>
    <TD>&nbsp;</TD>
    <TD STYLE="font-size: 10pt"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Pipelines and Energy</FONT></TD>
    <TD>&nbsp;</TD>
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">700 Louisiana Street, Suite&nbsp;1300</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Houston, Texas</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">77002-2761</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Phone:&#9;(877) 290-2772</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P></TD></TR>
</TABLE>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">Schedule I</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"></P>

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    <DIV STYLE="break-before: page; margin-top: 6pt; margin-bottom: 12pt"><P STYLE="margin: 0pt">&nbsp;</P></DIV>
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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B><U>APPENDIX A&nbsp;&amp; B</U></B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Executive Officers and Directors of TC Energy Corporation (&ldquo;TC
Energy&rdquo;) and TransCanada PipeLines Limited:</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><B>DIRECTORS:</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="width: 100%; font: 10pt Times New Roman, Times, Serif; border-collapse: collapse">
<TR STYLE="vertical-align: top">
    <TD STYLE="width: 32%">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center; border-bottom: Black 0.5pt solid"><B>Name
        and Citizenship</B></P></TD>
    <TD STYLE="width: 1%">&nbsp;</TD>
    <TD STYLE="width: 34%">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center; border-bottom: Black 0.5pt solid"><B>Principal
        Occupation</B></P></TD>
    <TD STYLE="width: 1%">&nbsp;</TD>
    <TD STYLE="width: 32%">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center; border-bottom: Black 0.5pt solid"><B>Business
        Address</B></P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">St</FONT>&eacute;phan
        Cr&eacute;tier</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Canada</P></TD>
    <TD>&nbsp;</TD>
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Chairman, President and Chief Executive Officer, GardaWorld
        Security Corporation</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P></TD>
    <TD>&nbsp;</TD>
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">450 &ndash; 1st Street SW</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Calgary, Alberta, Canada T2P 5H1</P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Michael R. Culbert</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Canada</P></TD>
    <TD>&nbsp;</TD>
    <TD STYLE="font-size: 10pt"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Corporate Director</FONT></TD>
    <TD>&nbsp;</TD>
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">450 &ndash; 1st Street SW</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Calgary, Alberta, Canada T2P 5H1</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Fran</FONT>&ccedil;ois
        L. Poirier</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Canada</P></TD>
    <TD>&nbsp;</TD>
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">President, Chief Executive Officer and Director TC Energy and
        TransCanada PipeLines Limited</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P></TD>
    <TD>&nbsp;</TD>
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">450 &ndash; 1st Street SW</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Calgary, Alberta, Canada T2P 5H1</P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Susan C. Jones</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Canada and the United Kingdom</P></TD>
    <TD>&nbsp;</TD>
    <TD STYLE="font-size: 10pt"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Corporate Director</FONT></TD>
    <TD>&nbsp;</TD>
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">450 &ndash; 1st Street SW</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Calgary, Alberta, Canada T2P 5H1</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Randy Limbacher</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">United States</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P></TD>
    <TD>&nbsp;</TD>
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Chief Executive Officer, Meridian Energy, LLC</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P></TD>
    <TD>&nbsp;</TD>
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">450 &ndash; 1st Street SW</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Calgary, Alberta, Canada T2P 5H1</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">John E. Lowe</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">United States</P></TD>
    <TD>&nbsp;</TD>
    <TD STYLE="font-size: 10pt"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Senior Executive Advisor, Tudor, Pickering, Holt&nbsp;&amp; Co., LLC</FONT></TD>
    <TD>&nbsp;</TD>
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">450 &ndash; 1st Street SW</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Calgary, Alberta, Canada T2P 5H1</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">David MacNaughton</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Canada</P></TD>
    <TD>&nbsp;</TD>
    <TD STYLE="font-size: 10pt"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">President, Palantir Canada</FONT></TD>
    <TD>&nbsp;</TD>
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">450 &ndash; 1st Street SW</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Calgary, Alberta, Canada T2P 5H1</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Una Power</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Canada</P></TD>
    <TD>&nbsp;</TD>
    <TD STYLE="font-size: 10pt"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Corporate Director</FONT></TD>
    <TD>&nbsp;</TD>
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">450 &ndash; 1st Street SW</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Calgary, Alberta, Canada T2P 5H1</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Mary Pat Salomone</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">United States</P></TD>
    <TD>&nbsp;</TD>
    <TD STYLE="font-size: 10pt"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Corporate Director</FONT></TD>
    <TD>&nbsp;</TD>
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">450 &ndash; 1st Street SW</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Calgary, Alberta, Canada T2P 5H1</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Indira V. Samarasekera</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Canada</P></TD>
    <TD>&nbsp;</TD>
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Senior Advisor, Bennett Jones LLP</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P></TD>
    <TD>&nbsp;</TD>
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">450 &ndash; 1st Street SW</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Calgary, Alberta, Canada T2P 5H1</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">D. Michael G. Stewart</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Canada</P></TD>
    <TD>&nbsp;</TD>
    <TD STYLE="font-size: 10pt"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Corporate Director</FONT></TD>
    <TD>&nbsp;</TD>
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">450 &ndash; 1st Street SW</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Calgary, Alberta, Canada T2P 5H1</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Siim A. Vanaselja</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Canada</P></TD>
    <TD>&nbsp;</TD>
    <TD STYLE="font-size: 10pt"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Corporate director</FONT></TD>
    <TD>&nbsp;</TD>
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">450 &ndash; 1st Street SW</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Calgary, Alberta, Canada T2P 5H1</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Thierry Vandal</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Canada</P></TD>
    <TD>&nbsp;</TD>
    <TD STYLE="font-size: 10pt"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">President, Axium Infrastructure US,&nbsp;Inc.</FONT></TD>
    <TD>&nbsp;</TD>
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">450 &ndash; 1st Street SW</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Calgary, Alberta, Canada T2P 5H1</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Steven W. Williams</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Canada</P></TD>
    <TD>&nbsp;</TD>
    <TD STYLE="font-size: 10pt"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Corporate Director</FONT></TD>
    <TD>&nbsp;</TD>
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">450 &ndash; 1st Street SW</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Calgary, Alberta, Canada T2P 5H1</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"></P></TD></TR>
</TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="text-align: center; font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt">Appendix A&nbsp;&amp;
B - 1</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"></P>

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    <DIV STYLE="break-before: page; margin-top: 6pt; margin-bottom: 12pt"><P STYLE="margin: 0pt">&nbsp;</P></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><B>EXECUTIVE OFFICERS:</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="width: 100%; font: 10pt Times New Roman, Times, Serif; border-collapse: collapse">
<TR STYLE="vertical-align: top">
    <TD STYLE="width: 32%">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center; border-bottom: Black 0.5pt solid"><B>Name
        and Citizenship</B></P></TD>
    <TD STYLE="width: 1%">&nbsp;</TD>
    <TD STYLE="width: 34%">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center; border-bottom: Black 0.5pt solid"><B>Principal
        Occupation</B></P></TD>
    <TD STYLE="width: 1%">&nbsp;</TD>
    <TD STYLE="width: 32%">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center; border-bottom: Black 0.5pt solid"><B>Business
        Address</B></P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Fran</FONT>&ccedil;ois
        L. Poirier</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Canada</P></TD>
    <TD>&nbsp;</TD>
    <TD STYLE="font-size: 10pt"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">President and Chief Executive Officer</FONT></TD>
    <TD>&nbsp;</TD>
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">450 &ndash; 1st Street SW</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Calgary, Alberta, Canada T2P 5H1</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Donald R. Marchand</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Canada</P></TD>
    <TD>&nbsp;</TD>
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Executive Vice-President, Strategy&nbsp;&amp; Corporate Development
        and Chief Financial Officer</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P></TD>
    <TD>&nbsp;</TD>
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">450 &ndash; 1st Street SW</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Calgary, Alberta, Canada T2P 5H1</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Stanley G. Chapman III</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">United States</P></TD>
    <TD>&nbsp;</TD>
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Executive Vice-President and President, U.S. and Mexico Natural
        Gas Pipelines</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P></TD>
    <TD>&nbsp;</TD>
    <TD STYLE="font-size: 10pt"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">700 Louisiana Street, Suite&nbsp;1300 Houston, TX&nbsp;&nbsp;77002-2761</FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Dawn E. de Lima</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Canada</P></TD>
    <TD>&nbsp;</TD>
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Executive Vice-President, Corporate Services</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P></TD>
    <TD>&nbsp;</TD>
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">450 &ndash; 1st Street SW</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Calgary, Alberta, Canada T2P 5H1</P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Corey Hessen</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">United States</P></TD>
    <TD>&nbsp;</TD>
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Senior Vice-President and President, Power and Storage</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P></TD>
    <TD>&nbsp;</TD>
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">450 &ndash; 1st Street SW</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Calgary, Alberta, Canada T2P 5H1</P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Wendy L. Hanrahan</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Canada</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P></TD>
    <TD>&nbsp;</TD>
    <TD STYLE="font-size: 10pt"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Executive Vice-President and Senior Advisor</FONT></TD>
    <TD>&nbsp;</TD>
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">450 &ndash; 1st Street SW</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Calgary, Alberta, Canada T2P 5H1</P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Joel E. Hunter</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Canada</P></TD>
    <TD>&nbsp;</TD>
    <TD STYLE="font-size: 10pt"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Senior Vice-President, Capital Markets</FONT></TD>
    <TD>&nbsp;</TD>
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">450 &ndash; 1st Street SW</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Calgary, Alberta, Canada T2P 5H1</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Leslie C. Kass</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">United States</P></TD>
    <TD>&nbsp;</TD>
    <TD STYLE="font-size: 10pt"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Executive Vice-President, Technical Centre </FONT></TD>
    <TD>&nbsp;</TD>
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">450 &ndash; 1st Street SW</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Calgary, Alberta, Canada T2P 5H1</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Patrick M. Keys</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Canada</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P></TD>
    <TD>&nbsp;</TD>
    <TD STYLE="font-size: 10pt"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Executive Vice-President, Stakeholder Relations and General Counsel</FONT></TD>
    <TD>&nbsp;</TD>
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">450 &ndash; 1st Street SW</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Calgary, Alberta, Canada T2P 5H1</P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Tracy A. Robinson</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Canada</P></TD>
    <TD>&nbsp;</TD>
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Executive Vice-President and President, Canadian Natural Gas
        Pipelines and President Coastal GasLink</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P></TD>
    <TD>&nbsp;</TD>
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">450 &ndash; 1st Street SW</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Calgary, Alberta, Canada T2P 5H1</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Bevin Wirzba</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Canada and the United Kingdom</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"></P></TD>
    <TD>&nbsp;</TD>
    <TD STYLE="font-size: 10pt"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Executive Vice-President and President, Liquids Pipelines</FONT></TD>
    <TD>&nbsp;</TD>
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">450 &ndash; 1st Street SW</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Calgary, Alberta, Canada T2P 5H1</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P></TD></TR>
</TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="text-align: center; font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt">Appendix A&nbsp;&amp;
B - 2</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

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    <DIV STYLE="break-before: page; margin-top: 6pt; margin-bottom: 12pt"><P STYLE="margin: 0pt">&nbsp;</P></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B><U>APPENDIX C</U></B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Executive Officers and Directors of TransCanada PipeLine USA
Ltd. (&ldquo;TransCanada PipeLine USA&rdquo;):</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="width: 100%; font: 10pt Times New Roman, Times, Serif; border-collapse: collapse">
<TR STYLE="vertical-align: top">
    <TD STYLE="width: 32%">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center; border-bottom: black 0.5pt solid"><B>Name
        and Citizenship</B></P></TD>
    <TD STYLE="width: 1%">&nbsp;</TD>
    <TD STYLE="width: 34%">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center; border-bottom: black 0.5pt solid"><B>Principal
        Occupation</B></P></TD>
    <TD STYLE="width: 1%">&nbsp;</TD>
    <TD STYLE="width: 32%">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center; border-bottom: black 0.5pt solid"><B>Business
        Address</B></P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Stanley G. Chapman III</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">United States</P></TD>
    <TD>&nbsp;</TD>
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Director and President of TransCanada PipeLine USA; Executive
        Vice-President and President, U.S. and Mexico Natural Gas Pipelines, TC Energy</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P></TD>
    <TD>&nbsp;</TD>
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">700 Louisiana Street, Suite&nbsp;1300</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Houston, Texas 77002-2761</P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Nathaniel A. Brown</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">United States</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P></TD>
    <TD>&nbsp;</TD>
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Director and Controller of TransCanada PipeLine USA; Vice-President,
        U.S. Natural Gas Pipelines Financial Services, TransCanada USA Services Inc.</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P></TD>
    <TD>&nbsp;</TD>
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">700 Louisiana Street, Suite&nbsp;1300</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Houston, Texas 77002-2761</P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Tina Faraca</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">United States</P></TD>
    <TD>&nbsp;</TD>
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Director and Vice-President of TransCanada PipeLine USA; Senior
        Vice-President, U.S. Commercial, TransCanada USA Services Inc.</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P></TD>
    <TD>&nbsp;</TD>
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">700 Louisiana Street, Suite&nbsp;1300</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Houston, Texas 77002-2761</P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Jon A. Dobson</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">United States</P></TD>
    <TD>&nbsp;</TD>
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Corporate Secretary of TransCanada PipeLine USA; Director, U.S.
        Governance and Securities Law, TransCanada USA Services Inc.</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P></TD>
    <TD>&nbsp;</TD>
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">700 Louisiana Street, Suite&nbsp;1300</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Houston, Texas 77002-2761</P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Burton D. Cole</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">United States</P></TD>
    <TD>&nbsp;</TD>
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Vice-President of TransCanada PipeLine USA; Director, U.S. Pipeline
        Accounting, TransCanada USA Services Inc.</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P></TD>
    <TD>&nbsp;</TD>
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">700 Louisiana Street, Suite&nbsp;1300</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Houston, Texas 77002-2761</P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">James R. Eckert</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">United States</P></TD>
    <TD>&nbsp;</TD>
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Vice-President of TransCanada PipeLine USA; Vice-President,
        U.S. Marketing and Optimization, TransCanada USA Services Inc.</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P></TD>
    <TD>&nbsp;</TD>
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">700 Louisiana Street, Suite&nbsp;1300</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Houston, Texas 77002-2761</P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Nancy A. Johnson</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Canada</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P></TD>
    <TD>&nbsp;</TD>
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Vice-President and Treasurer of TransCanada PipeLine USA; Vice
        President, Treasury and International Finance, TransCanada PipeLines Limited</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P></TD>
    <TD>&nbsp;</TD>
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">450 - 1st Street SW</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Calgary, Alberta, Canada T2P 5H1</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">William C. Morris</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Canada</P></TD>
    <TD>&nbsp;</TD>
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Vice-President, Finance of TransCanada PipeLine USA; Director,
        Corporate Finance and Assistant Treasurer, TransCanada PipeLines Limited</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P></TD>
    <TD>&nbsp;</TD>
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">450 - 1st Street SW</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Calgary, Alberta, Canada T2P 5H1</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Alisa Williams</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">United States</P></TD>
    <TD>&nbsp;</TD>
    <TD STYLE="font-size: 10pt"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Vice-President, U.S. Taxation of TransCanada PipeLine USA; Director, U.S. Taxation, TransCanada USA Services Inc.</FONT></TD>
    <TD>&nbsp;</TD>
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">700 Louisiana Street, Suite&nbsp;1300</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Houston, Texas 77002-2761</P></TD></TR>
</TABLE>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="text-align: center; font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt">Appendix C - 1</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"></P>

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    <DIV STYLE="break-before: page; margin-top: 6pt; margin-bottom: 12pt"><P STYLE="margin: 0pt">&nbsp;</P></DIV>
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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="width: 100%; font: 10pt Times New Roman, Times, Serif; border-collapse: collapse">
<TR STYLE="vertical-align: top">
    <TD STYLE="width: 32%">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center; border-bottom: black 0.5pt solid"><B>Name
        and Citizenship</B></P></TD>
    <TD STYLE="width: 1%">&nbsp;</TD>
    <TD STYLE="width: 34%">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center; border-bottom: black 0.5pt solid"><B>Principal
        Occupation</B></P></TD>
    <TD STYLE="width: 1%">&nbsp;</TD>
    <TD STYLE="width: 32%">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center; border-bottom: black 0.5pt solid"><B>Business
        Address</B></P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Joshua Gibbon</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">United States</P></TD>
    <TD>&nbsp;</TD>
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Vice-President of TransCanada PipeLine USA; Vice-President,
        U.S. Rates, Regulatory and Strategy, TransCanada USA Services Inc.</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P></TD>
    <TD>&nbsp;</TD>
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">700 Louisiana Street, Suite&nbsp;1300</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Houston, TX 77002-2761</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Christopher E. Humes</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">United States</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P></TD>
    <TD>&nbsp;</TD>
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Vice-President of TransCanada PipeLine USA; Senior Vice-President,
        U.S. Gas Operations and Projects, TransCanada USA Services Inc.</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P></TD>
    <TD>&nbsp;</TD>
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">700 Louisiana Street, Suite&nbsp;1300</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Houston, TX 77002-2761</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Russell A. Mahan</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">United States</P></TD>
    <TD>&nbsp;</TD>
    <TD STYLE="font-size: 10pt"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Vice-President, U.S. Business Development of TransCanada PipeLine USA; Vice-President, U.S. Business Development, TransCanada USA Services Inc. </FONT></TD>
    <TD>&nbsp;</TD>
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">700 Louisiana Street, Suite&nbsp;1300</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Houston, TX 77002-2761</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P></TD></TR>
</TABLE>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">Appendix C - 2</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"></P>

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    <DIV STYLE="break-before: page; margin-top: 6pt; margin-bottom: 12pt"><P STYLE="margin: 0pt">&nbsp;</P></DIV>
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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B><U>APPENDIX D</U></B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Executive Officers and Directors of TransCan Northern Ltd. (&ldquo;TransCan
Northern&rdquo;):</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="width: 100%; font: 10pt Times New Roman, Times, Serif; border-collapse: collapse">
<TR STYLE="vertical-align: top">
    <TD STYLE="width: 32%">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center; border-bottom: Black 0.5pt solid"><B>Name
        and Citizenship</B></P></TD>
    <TD STYLE="width: 1%">&nbsp;</TD>
    <TD STYLE="width: 34%">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center; border-bottom: Black 0.5pt solid"><B>Principal
        Occupation</B></P></TD>
    <TD STYLE="width: 1%">&nbsp;</TD>
    <TD STYLE="width: 32%">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center; border-bottom: Black 0.5pt solid"><B>Business
        Address</B></P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Stanley G. Chapman III</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">United States</P></TD>
    <TD>&nbsp;</TD>
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Director and President of TransCan Northern; Executive Vice-President
        and President, U.S. and Mexico Natural Gas Pipelines, TC Energy</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P></TD>
    <TD>&nbsp;</TD>
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">700 Louisiana Street, Suite&nbsp;1300</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Houston, Texas 77002-2761</P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Nathaniel A. Brown</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">United States</P></TD>
    <TD>&nbsp;</TD>
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Director and Controller of TransCan Northern; Vice-President,
        U.S. Natural Gas Pipelines Financial Services of TransCanada USA Services Inc.</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P></TD>
    <TD>&nbsp;</TD>
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">700 Louisiana Street, Suite&nbsp;1300</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Houston, Texas 77002-2761</P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Jon A. Dobson</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">United States</P></TD>
    <TD>&nbsp;</TD>
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Director and Corporate Secretary of TransCan Northern; Director,
        U.S. Governance and Securities Law of TransCanada USA Services Inc.</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P></TD>
    <TD>&nbsp;</TD>
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">700 Louisiana Street, Suite&nbsp;1300</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Houston, Texas 77002-2761</P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Burton D. Cole</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">United States</P></TD>
    <TD>&nbsp;</TD>
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Vice-President of TransCan Northern; Director, U.S. Pipeline
        Accounting of TransCanada USA Services Inc.</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P></TD>
    <TD>&nbsp;</TD>
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">700 Louisiana Street, Suite&nbsp;1300</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Houston, Texas 77002-2761</P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">James R. Eckert</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">United States</P></TD>
    <TD>&nbsp;</TD>
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Vice-President of TransCan Northern; Vice-President, U.S. Marketing
        and Optimization of TransCanada USA Services Inc.</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P></TD>
    <TD>&nbsp;</TD>
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">700 Louisiana Street, Suite&nbsp;1300</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Houston, Texas 77002-2761</P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Tina Faraca</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">United States</P></TD>
    <TD>&nbsp;</TD>
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Vice-President of TransCan Northern; Senior Vice-President,
        U.S. Commercial</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P></TD>
    <TD>&nbsp;</TD>
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">700 Louisiana Street, Suite&nbsp;1300</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Houston, Texas 77002-2761</P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Nancy A. Johnson</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Canada</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P></TD>
    <TD>&nbsp;</TD>
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Vice-President and Treasurer of TransCan Northern; Vice President,
        Treasury and International Finance of TransCanada PipeLines Limited</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P></TD>
    <TD>&nbsp;</TD>
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">450 - 1st Street SW</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Calgary, Alberta, Canada T2P 5H1</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">William C. Morris</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Canada</P></TD>
    <TD>&nbsp;</TD>
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Vice-President, Finance of TransCan Northern; Director, Corporate
        Finance and Assistant Treasurer of TransCanada PipeLines Limited</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P></TD>
    <TD>&nbsp;</TD>
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">450 - 1st Street SW</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Calgary, Alberta, Canada T2P 5H1</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Alisa Williams</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">United States</P></TD>
    <TD>&nbsp;</TD>
    <TD STYLE="font-size: 10pt"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Vice-President, U.S. Taxation of TransCan Northern; Director, U.S. Taxation of TransCanada USA Services Inc.</FONT></TD>
    <TD>&nbsp;</TD>
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">700 Louisiana Street, Suite&nbsp;1300</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Houston, Texas 77002-2761</P></TD></TR>
</TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">Appendix D - 1</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"></P>

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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B><U>APPENDIX E</U></B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Executive Officers and Directors of TC PipeLines GP,&nbsp;Inc.
(&ldquo;GP&rdquo;)</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="width: 100%; font: 10pt Times New Roman, Times, Serif; border-collapse: collapse">
<TR STYLE="vertical-align: top">
    <TD STYLE="width: 32%">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center; border-bottom: Black 0.5pt solid"><B>Name
        and Citizenship</B></P></TD>
    <TD STYLE="width: 1%">&nbsp;</TD>
    <TD STYLE="width: 34%">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center; border-bottom: Black 0.5pt solid"><B>Principal
        Occupation</B></P></TD>
    <TD STYLE="width: 1%">&nbsp;</TD>
    <TD STYLE="width: 32%">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center; border-bottom: Black 0.5pt solid"><B>Business
        Address</B></P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Stanley G. Chapman III</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">United States</P></TD>
    <TD>&nbsp;</TD>
    <TD STYLE="font-size: 10pt"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Chair and Director of GP; Executive Vice-President and President, U.S. and Mexico Natural Gas Pipelines, TC Energy </FONT></TD>
    <TD>&nbsp;</TD>
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">700 Louisiana Street, Suite&nbsp;1300</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Houston, TX 77002-2761</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Nathaniel A. Brown</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">United States</P></TD>
    <TD>&nbsp;</TD>
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">President, Principal Executive Officer and Director of GP; Vice-President,
        U.S. Natural Gas Pipelines Financial Services of TransCanada USA Services Inc.</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P></TD>
    <TD>&nbsp;</TD>
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">700 Louisiana Street, Suite&nbsp;1300</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Houston, Texas 77002-2761</P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Gloria L. Hartl</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Canada</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P></TD>
    <TD>&nbsp;</TD>
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Director of GP; Vice-President, Risk Management, TC Energy</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P></TD>
    <TD>&nbsp;</TD>
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">450 - 1st Street SW</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Calgary, Alberta, Canada T2P 5H1</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Nadine E. Berge</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Canada</P></TD>
    <TD>&nbsp;</TD>
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Director of GP; Director, Corporate Compliance and Legal Operations,
        TransCanada PipeLines Limited</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P></TD>
    <TD>&nbsp;</TD>
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">450 - 1st Street SW</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Calgary, Alberta, Canada T2P 5H1</P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Janine M. Watson</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Canada</P></TD>
    <TD>&nbsp;</TD>
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Vice-President and General Manager of GP; Director, U.S. Natural
        Gas Joint Ventures, TransCanada PipeLines Limited</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P></TD>
    <TD>&nbsp;</TD>
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">450 - 1st Street SW</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Calgary, Alberta, Canada T2P 5H1</P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Alisa Williams</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">United States</P></TD>
    <TD>&nbsp;</TD>
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Vice-President, Taxation of GP; Director, U.S. Taxation, TransCanada
        USA Services Inc.</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P></TD>
    <TD>&nbsp;</TD>
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">700 Louisiana Street, Suite&nbsp;1300</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Houston, Texas 77002-2761</P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Jon A. Dobson</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">United States</P></TD>
    <TD>&nbsp;</TD>
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Secretary of GP; Director, U.S. Governance and Securities Law,
        TransCanada USA Services Inc.</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P></TD>
    <TD>&nbsp;</TD>
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">700 Louisiana Street, Suite&nbsp;1300</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Houston, Texas 77002-2761</P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Burton D. Cole</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">United States</P></TD>
    <TD>&nbsp;</TD>
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Controller of GP; Director, U.S. Pipeline Accounting, TransCanada
        USA Services Inc.</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P></TD>
    <TD>&nbsp;</TD>
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">700 Louisiana Street, Suite&nbsp;1300</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Houston, Texas 77002-2761</P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">William C. Morris</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Canada</P></TD>
    <TD>&nbsp;</TD>
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Vice-President, Principal Financial Officer and Treasurer of
        GP; Director, Corporate Finance and Assistant Treasurer, TransCanada PipeLines Limited</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P></TD>
    <TD>&nbsp;</TD>
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">450 - 1st Street SW</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Calgary, Alberta, Canada T2P 5H1</P></TD></TR>
</TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">Appendix E - 1</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"></P>

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