<SEC-DOCUMENT>0001279569-21-001837.txt : 20211229
<SEC-HEADER>0001279569-21-001837.hdr.sgml : 20211229
<ACCEPTANCE-DATETIME>20211229074452
ACCESSION NUMBER:		0001279569-21-001837
CONFORMED SUBMISSION TYPE:	6-K
PUBLIC DOCUMENT COUNT:		2
CONFORMED PERIOD OF REPORT:	20211229
FILED AS OF DATE:		20211229
DATE AS OF CHANGE:		20211229

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			TRANSALTA CORP
		CENTRAL INDEX KEY:			0001144800
		STANDARD INDUSTRIAL CLASSIFICATION:	ELECTRIC SERVICES [4911]
		IRS NUMBER:				000000000
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		6-K
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-15214
		FILM NUMBER:		211526139

	BUSINESS ADDRESS:	
		STREET 1:		110 12TH AVE SW BOX 1900 STATION M
		STREET 2:		CALGARY ALBERTA T2P 2MI
		CITY:			CALGARY
		STATE:			A0
		ZIP:			T2P2M1
		BUSINESS PHONE:		403-267-4724

	MAIL ADDRESS:	
		STREET 1:		110-12TH AVENUE SW
		CITY:			CALGARY ALBERTA CANADA
		STATE:			A0
		ZIP:			T2P2M1
</SEC-HEADER>
<DOCUMENT>
<TYPE>6-K
<SEQUENCE>1
<FILENAME>transalta6k.htm
<DESCRIPTION>FORM 6-K
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<P STYLE="font: bold 12pt Times New Roman, Times, Serif; margin: 10pt 0 0; text-align: center">UNITED STATES</P>

<P STYLE="font: bold 16pt Times New Roman, Times, Serif; margin: 0 0 6pt; text-align: center"><FONT STYLE="font-size: 14pt">SECURITIES
AND EXCHANGE COMMISSION<BR>
</FONT><FONT STYLE="font-size: 12pt">WASHINGTON, D.C. 20549 </FONT></P>

<P STYLE="font: bold 18pt Times New Roman, Times, Serif; margin: 10pt 0 6pt; text-align: center">FORM 6-K</P>

<P STYLE="font: bold 12pt Times New Roman, Times, Serif; margin: 6pt 0 0; text-align: center">REPORT OF FOREIGN PRIVATE ISSUER<BR>
PURSUANT TO RULE&nbsp;13a-16 OR 15d-16<BR>
UNDER THE SECURITIES EXCHANGE ACT OF 1934</P>

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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 12pt 0; text-align: center"><B>For the month of December, 2021<BR>
Commission File Number 001-15214</B></P>

<P STYLE="font: bold 16pt Times New Roman, Times, Serif; margin: 10pt 0 6pt; text-align: center"><FONT STYLE="font-size: 20pt">TRANSALTA
CORPORATION<BR>
</FONT><FONT STYLE="font-size: 10pt; font-weight: normal">(Translation of registrant's name into English)</FONT></P>

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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 12pt 0; text-align: center"><B>110-12th Avenue S.W., Box 1900, Station &ldquo;M&rdquo;,
Calgary, Alberta, Canada, T2P 2M1</B><BR>
(Address of principal executive offices)</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 6pt 0 0; text-align: justify">Indicate by check mark whether the registrant
files or will file annual reports under cover of Form 20-F or Form 40-F:</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 6pt 0 0; text-align: center"><FONT STYLE="font-weight: normal">Form&nbsp;20-F&nbsp;<FONT STYLE="font-family: Wingdings">&#168;</FONT>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
Form&nbsp;40-F&nbsp;<FONT STYLE="font-family: Wingdings">&#254;</FONT></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 6pt 0 0; text-align: justify">Indicate by check mark if the registrant is
submitting the Form 6-K in paper as permitted by Regulation&nbsp;S-T Rule&nbsp;101(b)(1). _____</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 6pt 0 0; text-align: justify">Indicate by check mark if the registrant is
submitting the Form 6-K in paper as permitted by Regulation&nbsp;S-T Rule&nbsp;101(b)(7). _____</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 6pt 0 0; text-align: justify">&nbsp;</P>

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<P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin: 12pt 0; text-align: left">Signatures</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 12pt 0 0; text-indent: 0.5in">Pursuant to the requirements of the Securities
Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.</P>

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

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 24pt 0pt 0pt 3.5in"><B>TRANSALTA CORPORATION</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 24pt 0 0 3in"><B>&nbsp;</B></P>

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  <TR STYLE="vertical-align: top">
    <TD STYLE="width: 13%">By:</TD>
    <TD STYLE="width: 87%; border-bottom: Black 1pt solid">/s/ Todd Stack</TD></TR>
  <TR STYLE="vertical-align: top">
    <TD>&nbsp;</TD>
    <TD>Name: Todd Stack</TD></TR>
  <TR STYLE="vertical-align: top">
    <TD>&nbsp;</TD>
    <TD>Title: Chief Financial Officer</TD></TR>
  </TABLE><BR STYLE="clear: both">
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 12pt 0">Date: December 29, 2021</P>

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

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


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<P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin: 12pt 0; text-align: center">EXHIBIT INDEX</P>

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    <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; border-bottom: Black 1pt solid"><B>Exhibit Number</B></P></TD>
    <TD STYLE="width: 2%; padding-right: 5.4pt; padding-left: 5.4pt; font: 10pt Times New Roman, Times, Serif">&nbsp;</TD>
    <TD STYLE="white-space: nowrap; width: 81%; padding-right: 5.4pt; padding-left: 5.4pt">
    <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; border-bottom: Black 1pt solid"><B>Description of Document</B></P></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; padding-right: 5.4pt; padding-left: 5.4pt">&nbsp;</TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; padding-right: 5.4pt; padding-left: 5.4pt">&nbsp;</TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; padding-right: 5.4pt; padding-left: 5.4pt">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; padding-right: 5.4pt; padding-left: 5.4pt"><A HREF="ex991.htm">99.1</A></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; padding-right: 5.4pt; padding-left: 5.4pt">&nbsp;</TD>
    <TD STYLE="font: 10pt/12pt Times New Roman, Times, Serif; padding-right: 5.4pt; padding-left: 5.4pt"><A HREF="ex991.htm">&ldquo;TransAlta Achieves Full Phase-Out of Coal in Canada&rdquo;</A></TD></TR>
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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

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<DOCUMENT>
<TYPE>EX-99.1
<SEQUENCE>2
<FILENAME>ex991.htm
<DESCRIPTION>NEWS RELEASE DATED DECEMBER 29, 2021
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<P STYLE="margin: 0; text-align: right"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt"><B>Exhibit 99.1</B></FONT></P>

<P STYLE="margin: 0; text-align: right"><FONT STYLE="font: 8pt Arial, Helvetica, Sans-Serif"><B>&nbsp;</B></FONT></P>

<P STYLE="margin: 0; text-align: right"><FONT STYLE="font: 8pt Arial, Helvetica, Sans-Serif"><B>&nbsp;</B></FONT></P>

<P STYLE="margin: 0; text-align: right"><FONT STYLE="font: 8pt Arial, Helvetica, Sans-Serif"><B>&nbsp;</B></FONT></P>

<P STYLE="font: bold 24pt Arial, Helvetica, Sans-Serif; margin-right: 0; margin-left: 0">TransAlta Achieves Full Phase-Out of Coal in
Canada</P>

<P STYLE="font: 15pt Arial, Helvetica, Sans-Serif; margin-right: 0; margin-left: 0">CALGARY, AB, Dec. 29, 2021 /CNW/ -&nbsp;TransAlta
Corporation (TSX: TA) (NYSE: TAC) (&quot;TransAlta&quot; or the &quot;Company&quot;) announced today that it has completed the last of
three planned coal-to-gas conversions (&quot;CTG&quot;) at its Alberta Thermal power generation facilities near Wabamun, Alberta.</P>

<P STYLE="font: 15pt Arial, Helvetica, Sans-Serif; margin-right: 0; margin-left: 0">&quot;The full conversion of Keephills Unit 3 (&quot;KH3&quot;)
from thermal coal to natural gas is a significant milestone for TransAlta in its transition off coal. We are pleased to have completed
this important step, nine years ahead of the government target,&quot; said John Kousinioris, President and CEO of TransAlta. &quot;Our
coal transition is among the most meaningful carbon emissions reduction achievements in Canadian history.&quot;</P>

<P STYLE="font: 15pt Arial, Helvetica, Sans-Serif; margin-right: 0; margin-left: 0">&quot;Converting to natural gas from coal maintains
the current generation capacity of KH3 and reduces our CO2 emissions by almost 50 per cent from approximately 0.86 tonnes CO<SUB>2</SUB>e
per MWh to approximately 0.43 tonnes CO<SUB>2</SUB>e per MWh,&quot; Mr. Kousinioris added. &quot;This not only highlights TransAlta's
continued commitment to meet Alberta's need for safe, reliable and low-cost electricity but also delivers a step-change reduction in the
emissions from our converted units.&quot;</P>

<P STYLE="font: 15pt Arial, Helvetica, Sans-Serif; margin-right: 0; margin-left: 0">The $29 million investment in the KH3 conversion plus
another $48 million for gas infrastructure and maintenance projects brought a significant boost to the local economy, and at its peak
provided nearly 600 construction jobs. Since 2019, TransAlta has invested $295 million in its CTG program that also included conversion
of Sundance Unit 6 (Q1-2021), conversion of Keephills Unit 2 (Q3-2021), conversion of Sheerness Units 1 and 2, plus construction of new
high-volume gas delivery infrastructure.&nbsp;</P>

<P STYLE="font: 15pt Arial, Helvetica, Sans-Serif; margin-right: 0; margin-left: 0">Overall, the converted units generate nearly 50 per
cent fewer CO<SUB>2 </SUB>emissions fueled by natural gas compared to coal. This project is a significant achievement for TransAlta towards
its target to reduce 60 per cent, or 19.7 million tonnes, of annual greenhouse gas emissions by 2030 over 2015 levels and achieve carbon
neutrality by 2050. By meeting its 2030 target, TransAlta's performance will exceed Canada's national Paris Agreement target of 40-45
per cent reduction by 2030. The completed conversions will also contribute to the goals of the Powering Past Coal Alliance, which TransAlta
joined at the 26th UN<B>&nbsp;</B>Climate Change&nbsp;Conference of the Parties (COP26).</P>

<P STYLE="font: 15pt Arial, Helvetica, Sans-Serif; margin-right: 0; margin-left: 0">With successful completion of the KH3 conversion and
the planned closure of the Highvale coal mine effective December 31, 2021, TransAlta's thermal facilities in Alberta will have been fully
transitioned to 100 per cent natural gas operation.&nbsp;In aggregate, TransAlta has retired 3,794 MW of coal-fired generation capacity
since 2018 while converting 1,659 MW to cleaner burning natural gas.</P>

<P STYLE="font: 15pt Arial, Helvetica, Sans-Serif; margin-right: 0; margin-left: 0">This achievement, coupled with TransAlta's growing
and diversified generating portfolio, including hydro, wind, solar and battery assets, helps position TransAlta to be a highly competitive
provider of reliable, low and zero-emitting electricity for customers in Canada, the United States, and Australia.</P>

<P STYLE="font: 15pt Arial, Helvetica, Sans-Serif; margin-right: 0; margin-left: 0"><B>TransAlta Thermal Facility Status Summary (near
Wabamun Lake, Alberta) </B></P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="width: 100%; font: 7.5pt Arial, Helvetica, Sans-Serif; border-collapse: collapse">
  <TR>
    <TD STYLE="border: Black 1pt solid; padding-left: 6pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt"><B>Unit</B></FONT></TD>
    <TD STYLE="border-top: black 1pt solid; border-right: black 1pt solid; border-bottom: black 1pt solid; padding-right: 6pt; padding-left: 6pt">
    <P STYLE="font: 8pt Arial, Helvetica, Sans-Serif; margin: 0; text-align: center"><B>Unit MCR</B></P>
    <P STYLE="font: 8pt Arial, Helvetica, Sans-Serif; margin: 0; text-align: center"><B>(MW net)</B></P></TD>
    <TD STYLE="border-top: black 1pt solid; border-right: black 1pt solid; border-bottom: black 1pt solid; padding-right: 6pt; padding-left: 6pt; text-align: center"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt"><B>Current Status</B></FONT></TD></TR>
  <TR>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid; padding-right: 6pt; padding-left: 6pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">Sundance Unit 1</FONT></TD>
    <TD STYLE="border-bottom: black 1pt solid; border-right: black 1pt solid; padding-right: 6pt; padding-left: 6pt; text-align: center"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">280</FONT></TD>
    <TD STYLE="border-bottom: black 1pt solid; border-right: black 1pt solid; padding-right: 6pt; padding-left: 6pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">Retired Dec. 31, 2017</FONT></TD></TR>
  <TR>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid; padding-right: 6pt; padding-left: 6pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">Sundance Unit 2</FONT></TD>
    <TD STYLE="border-bottom: black 1pt solid; border-right: black 1pt solid; padding-right: 6pt; padding-left: 6pt; text-align: center"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">280</FONT></TD>
    <TD STYLE="border-bottom: black 1pt solid; border-right: black 1pt solid; padding-right: 6pt; padding-left: 6pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">Retired July 31, 2018</FONT></TD></TR>
  <TR>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid; padding-right: 6pt; padding-left: 6pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">Sundance Unit 3</FONT></TD>
    <TD STYLE="border-bottom: black 1pt solid; border-right: black 1pt solid; padding-right: 6pt; padding-left: 6pt; text-align: center"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">368</FONT></TD>
    <TD STYLE="border-bottom: black 1pt solid; border-right: black 1pt solid; padding-right: 6pt; padding-left: 6pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">Retired July 31, 2020</FONT></TD></TR>
  <TR>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid; padding-right: 6pt; padding-left: 6pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">Sundance Unit 4</FONT></TD>
    <TD STYLE="border-bottom: black 1pt solid; border-right: black 1pt solid; padding-right: 6pt; padding-left: 6pt; text-align: center"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">406</FONT></TD>
    <TD STYLE="border-bottom: black 1pt solid; border-right: black 1pt solid; padding-right: 6pt; padding-left: 6pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">Fueled only on natural gas Jan. 1 to Mar. 31, </FONT><FONT STYLE="font-size: 8pt"><BR>
<FONT STYLE="font-family: Arial, Helvetica, Sans-Serif">2022. Scheduled to retire April 1, 2022.</FONT></FONT></TD></TR>
  <TR>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid; padding-right: 6pt; padding-left: 6pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">Sundance Unit 5</FONT></TD>
    <TD STYLE="border-bottom: black 1pt solid; border-right: black 1pt solid; padding-right: 6pt; padding-left: 6pt; text-align: center"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">406</FONT></TD>
    <TD STYLE="border-bottom: black 1pt solid; border-right: black 1pt solid; padding-right: 6pt; padding-left: 6pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">Retired Nov. 1, 2021</FONT></TD></TR>
  <TR>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid; padding-right: 6pt; padding-left: 6pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">Sundance Unit 6</FONT></TD>
    <TD STYLE="border-bottom: black 1pt solid; border-right: black 1pt solid; padding-right: 6pt; padding-left: 6pt; text-align: center"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">401</FONT></TD>
    <TD STYLE="border-bottom: black 1pt solid; border-right: black 1pt solid; padding-right: 6pt; padding-left: 6pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">Converted to natural gas Feb. 1, 2021</FONT></TD></TR>
  <TR>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid; padding-right: 6pt; padding-left: 6pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">Keephills Unit 1</FONT></TD>
    <TD STYLE="border-bottom: black 1pt solid; border-right: black 1pt solid; padding-right: 6pt; padding-left: 6pt; text-align: center"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">395</FONT></TD>
    <TD STYLE="border-bottom: black 1pt solid; border-right: black 1pt solid; padding-right: 6pt; padding-left: 6pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">Scheduled to retire Dec. 31, 2021</FONT></TD></TR>
  <TR>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid; padding-right: 6pt; padding-left: 6pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">Keephills Unit 2</FONT></TD>
    <TD STYLE="border-bottom: black 1pt solid; border-right: black 1pt solid; padding-right: 6pt; padding-left: 6pt; text-align: center"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">395</FONT></TD>
    <TD STYLE="border-bottom: black 1pt solid; border-right: black 1pt solid; padding-right: 6pt; padding-left: 6pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">Converted to natural gas July 19, 2021</FONT></TD></TR>
  <TR>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid; padding-right: 6pt; padding-left: 6pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">Keephills Unit 3</FONT></TD>
    <TD STYLE="border-bottom: black 1pt solid; border-right: black 1pt solid; padding-right: 6pt; padding-left: 6pt; text-align: center"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">463</FONT></TD>
    <TD STYLE="border-bottom: black 1pt solid; border-right: black 1pt solid; padding-right: 6pt; padding-left: 6pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">Converted to natural gas Dec. 29, 2021</FONT></TD></TR>
  <TR>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid; padding-right: 6pt; padding-left: 6pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">Sheerness Unit 1</FONT></TD>
    <TD STYLE="border-bottom: black 1pt solid; border-right: black 1pt solid; padding-right: 6pt; padding-left: 6pt; text-align: center"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">200</FONT></TD>
    <TD STYLE="border-bottom: black 1pt solid; border-right: black 1pt solid; padding-right: 6pt; padding-left: 6pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">Converted to natural gas March 31, 2021</FONT></TD></TR>
  <TR>
    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid; padding-right: 6pt; padding-left: 6pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">Sheerness Unit 2</FONT></TD>
    <TD STYLE="border-bottom: black 1pt solid; border-right: black 1pt solid; padding-right: 6pt; padding-left: 6pt; text-align: center"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">200</FONT></TD>
    <TD STYLE="border-bottom: black 1pt solid; border-right: black 1pt solid; padding-right: 6pt; padding-left: 6pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">Converted to natural gas April 4, 2020</FONT></TD></TR>
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    <TD STYLE="border-right: black 1pt solid; border-bottom: black 1pt solid; border-left: black 1pt solid; padding-right: 6pt; padding-left: 6pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">Highvale Mine</FONT></TD>
    <TD COLSPAN="2" STYLE="padding-left: 6pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt">Ending mining operations Dec. 31, 2021. Will begin full mine </FONT><FONT STYLE="font-size: 8pt"><BR>
<FONT STYLE="font-family: Arial, Helvetica, Sans-Serif">reclamation effective Jan. 1, 2022.</FONT></FONT></TD></TR>
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    <TD STYLE="padding-right: 6pt; padding-left: 6pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt"><B><I>About TransAlta:</I></B></FONT></TD></TR>
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    <TD STYLE="padding-right: 6pt; padding-left: 6pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt"><I>TransAlta owns, operates and develops a diverse fleet of electrical power generation assets in Canada, the United States and Australia with a focus on long-term shareholder value. TransAlta provides municipalities, medium and large industries, businesses and utility customers with clean, affordable, energy efficient and reliable power. Today, TransAlta is one of Canada's largest producers of wind power and Alberta's largest producer of hydro-electric power. For over 100 years, TransAlta has been a responsible operator and a proud community-member where its employees work and live. TransAlta aligns its corporate goals with the UN Sustainable Development Goals. </I></FONT></TD></TR>
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    <TD STYLE="padding-right: 6pt; padding-left: 6pt">&nbsp;</TD></TR>
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    <TD STYLE="padding-right: 6pt; padding-left: 6pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt"><I>For more information about TransAlta, visit its website at transalta.com.</I></FONT></TD></TR>
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    <TD STYLE="padding-right: 6pt; padding-left: 6pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt"><B><I>Cautionary Statement Regarding Forward-looking Information:</I></B></FONT></TD></TR>
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    <TD STYLE="padding-right: 6pt; padding-left: 6pt"><FONT STYLE="font-family: Arial, Helvetica, Sans-Serif; font-size: 8pt"><I>This news release contains &quot;forward-looking information&quot; within the meaning of applicable Canadian securities laws, and &quot;forward-looking statements&quot; within the meaning of applicable United States securities laws, including the United States Private Securities Litigation Reform Act of 1995 (collectively referred to herein as &quot;forward-looking statements&quot;). In some cases, forward-looking statements can be identified by terminology such as &quot;continue&quot;, &quot;will&quot;, &quot;develop&quot;, &quot;goal&quot;, &quot;target&quot; and similar expressions suggesting future events or future performance. More particularly, and without limitation, this news release contains forward-looking statements and information relating to: the Company's target of reducing 60 per cent, or 19.7 million tonnes, of annual greenhouse gas emission by 2030 over 2015 levels and achieving carbon neutrality by 2050, the Company's expected performance exceeding Canada's national Paris Agreement target, the planned closure of the Highvale coal mine effective December 31, 2021 and the resulting full transition of the Company's thermal facilities in Alberta to 100 per cent natural gas operation, and the expected timing of the retirement of Keephills Unit 1 and the full retirement of Sundance Unit 4. The forward-looking statements contained in this news release are based on current expectations, estimates, projections and assumptions, having regard to the Company's experience and its perception of historical trends, and includes, but is not limited to, expectations, estimates, projections and assumptions relating to the extent of regulations pertaining to COVID-19 not becoming significantly more onerous and current conditions and expected future developments. These statements are subject to a number of risks and uncertainties that may cause actual performance, events or results to differ materially from those contemplated by the forward-looking statements. Some of the factors that could cause such differences include: the effects of weather catastrophes and public health crises, including COVID-19; labour availability; disruptions to the Company's supply chains; failure to obtain necessary regulatory approvals in a timely fashion, or at all; and other risks and uncertainties discussed in the Company's materials filed with the securities regulatory authorities from time to time and as also set forth in the Company's Management's Discussion and Analysis and Annual Information Form for the year ended December 31, 2020, filed under the Company's profile with the Canadian securities regulators on www.sedar.com and the U.S. Securities and Exchange Commission on www.sec.gov. Readers are cautioned not to place undue reliance on these forward-looking statements, which reflect TransAlta's expectations only as of the date of this news release. TransAlta disclaims any intention or obligation to update or revise these forward-looking statements, whether as a result of new information, future events or otherwise, except as required by law.</I></FONT></TD></TR>
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<P STYLE="font: 15pt Arial, Helvetica, Sans-Serif; margin-right: 0; margin-left: 0">View original content:https://www.prnewswire.com/news-releases/transalta-achieves-full-phase-out-of-coal-in-canada-301451302.html</P>

<P STYLE="font: 15pt Arial, Helvetica, Sans-Serif; margin-right: 0; margin-left: 0">SOURCE TransAlta Corporation</P>

<P STYLE="font: 15pt Arial, Helvetica, Sans-Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 15pt Arial, Helvetica, Sans-Serif; margin-right: 0; margin-left: 0">View original content: http://www.newswire.ca/en/releases/archive/December2021/29/c6374.html</P>

<P STYLE="font: 15pt Arial, Helvetica, Sans-Serif; margin-right: 0; margin-left: 0">%CIK: 0001144800</P>

<P STYLE="font: 15pt Arial, Helvetica, Sans-Serif; margin: 0"><B>For further information: </B>Investor Inquiries: Phone: 1-800-387-3598
in Canada and U.S., Email: investor_relations@transalta.com; Media Inquiries: Phone: Toll-free media number: 1-855-255-9184, Email: ta_media_relations@transalta.com</P>

<P STYLE="font: 15pt Arial, Helvetica, Sans-Serif; margin-right: 0; margin-left: 0">CO: TransAlta Corporation</P>

<P STYLE="font: 15pt Arial, Helvetica, Sans-Serif; margin-right: 0; margin-left: 0">CNW 07:00e 29-DEC-21</P>
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