-----BEGIN PRIVACY-ENHANCED MESSAGE-----
Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
Originator-Key-Asymmetric:
 MFgwCgYEVQgBAQICAf8DSgAwRwJAW2sNKK9AVtBzYZmr6aGjlWyK3XmZv3dTINen
 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 FNaodCTOVgpKdWNjiUjbsrStenqv1ZwkdTPA+LzMmh9J32NgidSTfxyborEzNUs6
 c1+JCVorT/zlE15a6SDsBA==

<SEC-DOCUMENT>0001130319-06-000897.txt : 20061101
<SEC-HEADER>0001130319-06-000897.hdr.sgml : 20061101
<ACCEPTANCE-DATETIME>20061101172632
ACCESSION NUMBER:		0001130319-06-000897
CONFORMED SUBMISSION TYPE:	6-K
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20061101
FILED AS OF DATE:		20061101
DATE AS OF CHANGE:		20061101

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			CAMECO CORP
		CENTRAL INDEX KEY:			0001009001
		STANDARD INDUSTRIAL CLASSIFICATION:	MISCELLANEOUS METAL ORES [1090]
		IRS NUMBER:				980113090
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		6-K
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-14228
		FILM NUMBER:		061179950

	BUSINESS ADDRESS:	
		STREET 1:		2121 11TH ST W
		CITY:			SASKATOON
		STATE:			A9
		ZIP:			S7M 1J3
		BUSINESS PHONE:		3069566200

	MAIL ADDRESS:	
		STREET 1:		2121 11TH ST W.
		CITY:			SASKATOON
		STATE:			A9
		ZIP:			S7M 1J3
</SEC-HEADER>
<DOCUMENT>
<TYPE>6-K
<SEQUENCE>1
<FILENAME>o33579e6vk.htm
<DESCRIPTION>FORM 6-K
<TEXT>
<HTML>
<HEAD>
<TITLE>e6vk</TITLE>
</HEAD>
<BODY bgcolor="#FFFFFF">
<!-- PAGEBREAK -->
<H5 align="left" style="page-break-before:always">&nbsp;</H5><P>
<DIV style="font-family: 'Times New Roman',Times,serif">


<DIV style="width: 100%; border-bottom: 2pt solid black; font-size: 1pt">&nbsp;</DIV>
<DIV style="width: 100%; border-bottom: 1pt solid black; font-size: 1pt">&nbsp;</DIV>




<DIV align="center" style="font-size: 14pt; margin-top: 12pt"><B>UNITED STATES<BR>
SECURITIES AND EXCHANGE COMMISSION</B>
</DIV>

<DIV align="center" style="font-size: 12pt"><B>Washington, DC 20549</B>
</DIV>

<DIV align="center" style="font-size: 18pt; margin-top: 12pt"><B>FORM 6-K</B>
</DIV>


<DIV align="center" style="font-size: 12pt; margin-top: 12pt"><B>Report of Foreign Private Issuer<BR>
Pursuant to Rule&nbsp;13a-16 or 15d-16 Under<BR>
the Securities Exchange Act of 1934</B>
</DIV>

<DIV align="center" style="font-size: 12pt; margin-top: 12pt">For the month of November, 2006</DIV>

<DIV align="center" style="font-size: 24pt; margin-top: 12pt"><B>Cameco Corporation</B>
</DIV>

<DIV align="center" style="font-size: 10pt">(Commission file No.&nbsp;1-14228)</DIV>



<DIV align="center" style="font-size: 12pt; margin-top: 12pt"><B>2121 &#150; 11th Street West<BR>
Saskatoon, Saskatchewan, Canada S7M 1J3</B>
</DIV>

<DIV align="center" style="font-size: 10pt">(Address of Principal Executive Offices)</DIV>



<DIV align="left" style="font-size: 10pt; margin-top: 12pt">Indicate by check mark whether the registrant files or will file annual reports under cover
Form&nbsp;20-F or Form&nbsp;40-F.
</DIV>

<DIV align="center">
<TABLE style="font-size: 10pt" cellspacing="0" border="0" cellpadding="0" width="80%">
<!-- Begin Table Head -->
<TR valign="bottom">
    <TD width="45%">&nbsp;</TD>
    <TD width="10%">&nbsp;</TD>
    <TD width="45%">&nbsp;</TD>
</TR>
<!-- End Table Head -->
<!-- Begin Table Body -->
<TR valign="bottom">
    <TD align="center" valign="top"><DIV style="margin-left:0px; text-indent:-0px">Form&nbsp;20-F&nbsp;&nbsp;&nbsp;<FONT face="Wingdings">&#111;</FONT>
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">Form&nbsp;40-F&nbsp;&nbsp;&nbsp;<FONT face="Wingdings">&#254;</FONT></TD>
</TR>
<!-- End Table Body -->
</TABLE>
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 12pt">Indicate by check mark whether the registrant by furnishing the information contained in this Form
is also thereby furnishing the information to the Commission pursuant to Rule&nbsp;12g3-2(b) under the
Securities Exchange Act of 1934.
</DIV>

<DIV align="center">
<TABLE style="font-size: 10pt" cellspacing="0" border="0" cellpadding="0" width="80%">
<!-- Begin Table Head -->
<TR valign="bottom">
    <TD width="45%">&nbsp;</TD>
    <TD width="10%">&nbsp;</TD>
    <TD width="45%">&nbsp;</TD>
</TR>
<!-- End Table Head -->
<!-- Begin Table Body -->
<TR valign="bottom">
    <TD align="center" valign="top"><DIV style="margin-left:0px; text-indent:-0px">Yes&nbsp;&nbsp;&nbsp;<FONT face="Wingdings">&#111;</FONT>
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">No&nbsp;&nbsp;&nbsp;<FONT face="Wingdings">&#254;</FONT></TD>
</TR>
<!-- End Table Body -->
</TABLE>
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 12pt">If &#147;Yes&#148; is marked, indicate below the file number assigned to the registrant in connection with
Rule&nbsp;12g3-2(b):
</DIV>


<DIV style="width: 100%; border-bottom: 1pt solid black; margin-top: 10pt; font-size: 1pt">&nbsp;</DIV>
<DIV style="width: 100%; border-bottom: 2pt solid black; font-size: 1pt">&nbsp;</DIV>





<P align="center" style="font-size: 10pt"><!-- Folio -->&nbsp;<!-- /Folio -->
</DIV>

<!-- PAGEBREAK -->
<P><HR noshade><P>
<H5 align="left" style="page-break-before:always">&nbsp;</H5><P>

<DIV style="font-family: 'Times New Roman',Times,serif">








<DIV align="left" style="font-size: 10pt; margin-top: 12pt"><B><U>Exhibit&nbsp;Index</U></B>
</DIV>

<DIV align="center">
<TABLE style="font-size: 10pt" cellspacing="0" border="0" cellpadding="0" width="100%">
<!-- Begin Table Head -->
<TR valign="bottom">
    <TD width="8%">&nbsp;</TD>
    <TD width="3%">&nbsp;</TD>
    <TD width="78%">&nbsp;</TD>
    <TD width="3%">&nbsp;</TD>
    <TD width="8%">&nbsp;</TD>
</TR>
<TR style="font-size: 8pt" valign="bottom">
    <TD nowrap align="left" style="border-bottom: 1px solid #000000">Exhibit No.</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" style="border-bottom: 1px solid #000000">Description</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" style="border-bottom: 1px solid #000000">Page No.</TD>
</TR>
<!-- End Table Head -->

<!-- Begin Table Body -->
<TR valign="bottom">
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD align="center" valign="top"><DIV style="margin-left:0px; text-indent:-0px">1.
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Material Change Report dated
November&nbsp;1, 2006
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">3-4</TD>
</TR>
<!-- End Table Body -->
</TABLE>
</DIV>


<DIV align="center" style="font-size: 10pt; margin-top: 18pt"><B>SIGNATURE</B>
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt">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.
</DIV>

<TABLE width="100%" border="0" cellspacing="0" cellpadding="0" style="font-size: 10pt">
<TR>
    <TD width="48%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="35%">&nbsp;</TD>
    <TD width="15%">&nbsp;</TD>
</TR>
<TR>
    <TD valign="top" align="left">Date: November 1, 2006&nbsp;</TD>
    <TD colspan="3" align="left">Cameco Corporation<BR>
&nbsp;</TD>
    <TD>&nbsp;</TD>
</TR><TR>
    <TD align="left">&nbsp;</TD>
    <TD valign="top">By:&nbsp;&nbsp;</TD>
    <TD colspan="2" style="border-bottom: 1px solid #000000" align="left"><I>"Gary M.S. Chad"</I>
&nbsp;</TD>
    <TD>&nbsp;</TD>
</TR><TR>
    <TD align="left">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD colspan="2" align="left">Gary M.S. Chad&nbsp;</TD>
    <TD>&nbsp;</TD>
</TR><TR>
    <TD align="left">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD colspan="2" align="left">Senior Vice-President, Governance,
Legal and Regulatory Affairs, and
Corporate Secretary&nbsp;</TD>
    <TD>&nbsp;</TD>
</TR>

</TABLE>

<P align="center" style="font-size: 10pt"><!-- Folio -->2<!-- /Folio -->
</DIV>

<!-- PAGEBREAK -->
<P><HR noshade><P>
<H5 align="left" style="page-break-before:always">&nbsp;</H5><P>

<DIV style="font-family: 'Times New Roman',Times,serif">


<TABLE width="100%" border="0" cellspacing="0" cellpadding="0" style="font-size: 10pt">
<TR>
    <TD width="48%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="35%">&nbsp;</TD>
    <TD width="15%">&nbsp;</TD>
</TR>

</TABLE>

<DIV align="center" style="font-size: 12pt; margin-top: 18pt"><B>FORM 51-102F3<BR>
MATERIAL CHANGE REPORT</B>
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 12pt"><B>Item&nbsp;1 &#151; Name and Address of Company</B>
</DIV>



<DIV align="left" style="font-size: 10pt; margin-top: 6pt">Cameco Corporation (&#147;Cameco&#148;)<BR>
2121 &#150; 11<SUP style="font-size: 85%; vertical-align: text-top">th</SUP> Street West, Saskatoon, Saskatchewan S7M 1J3
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 12pt"><B>Item&nbsp;2 &#151; Date of Material Change</B>
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt">October&nbsp;23, 2006
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt"><B>Item&nbsp;3 &#151; News Release</B>
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt">The English versions and the French translation versions of the two press releases relating to this
material change were distributed and filed by Canadian Corporate News through their Canadian Timely
Disclosure Pack and U.S. Timely Disclosure Pack on October&nbsp;23, 2006.
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 12pt"><B>Item&nbsp;4 &#151; Summary of Material Change</B>
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt">On October&nbsp;23, 2006, Cameco reported a second water inflow at Cigar Lake following a rock fall on
October&nbsp;22, 2006 in a future production area that had been previously dry. Efforts to protect the
main shaft and key underground infrastructure by closing the bulk head doors were unsuccessful. All
underground areas of the Cigar Lake project have filled with water. Everyone was safely evacuated
from the mine, no injuries were sustained and there was no impact on the environment. Cigar Lake
production was expected in 2008 prior to the water inflow incident. Cameco is investigating
options to restore access to the mine.
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 12pt"><B>Item&nbsp;5 &#151; Full Description of Material Change</B>
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt">On October&nbsp;23, 2006, Cameco reported a second water inflow at Cigar Lake following a rock fall on
October&nbsp;22, 2006 in a future production area that had been previously dry. Efforts to protect the
main shaft and key underground infrastructure by closing the bulk head doors were unsuccessful. All
underground areas of the Cigar Lake project have filled with water. Everyone was safely evacuated
from the mine, no injuries were sustained and there was no impact on the environment. Cigar Lake
production was expected in 2008 prior to the water inflow incident.
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">Cameco is investigating options to restore access to the mine. Production start up was previously
planned for early 2008 and the company will assess a new production timetable after remediation
plans are developed. Cameco is operator and majority owner of the Cigar Lake project in northern
Saskatchewan.
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">The incident began at 1:10 p.m. on Sunday, October&nbsp;22, 2006, in the future production area that
previously had been dry. At 8:45 p.m., in accordance with existing contingency plans, the company
decided to close two bulkhead doors to contain the water inflow within the future mining areas. The
doors were closed at 5:00 a.m. on Monday, October&nbsp;23, 2006. While monitoring the area, the company
found that one of the doors did not seal properly which allowed significant water to flow into the
processing area. Efforts to fully the seal the doors were not successful and the inflow exceeded
capacity to pump out the water.
</DIV>

<P align="center" style="font-size: 10pt"><!-- Folio -->3<!-- /Folio -->
</DIV>

<!-- PAGEBREAK -->
<P><HR noshade><P>
<H5 align="left" style="page-break-before:always">&nbsp;</H5><P>

<DIV style="font-family: 'Times New Roman',Times,serif">

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">Cameco is committed to develop plans to remediate the project and preserve this valuable asset.
Cameco will develop new timelines for construction, cost estimates and production forecasts. The
capital cost is expected to be significantly higher.
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">Cameco has supply interruption in its contracts providing the right to reduce, defer, or cancel
volumes on a pro-rata basis if the company experiences a shortfall in planned production. This
language protects about three-quarters of current contracted volumes. This percent will rise as old
contracts expire. All contracts also contain standard force majeure protection. The baseload
contracts put in place to support the development of Cigar Lake also contain supply interruption
language, which allows Cameco to reduce, defer or terminate Cigar Lake product deliveries in the
event of any delay or shortfall in Cigar Lake production. Given the foregoing contractual
protections, Cameco is adequately positioned to meet its contractual obligations.
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">On October&nbsp;31, 2006, Cameco issued its report for the quarter ending September&nbsp;30, 2006. This
report has been filed with securities regulators. This report contains additional information
regarding this material change, including an analysis of the implications to reserve classification
at Cigar Lake. Therefore, the reader of this material change report should also review the
disclosure relating to the incident contained in Cameco&#146;s October&nbsp;31, 2006 report.
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">The Cigar Lake project is located 660 kilometres north of Saskatoon with a workforce of 650 during
the construction phase. The Cigar Lake mine is owned by Cameco Corporation (50%), AREVA Resources
Canada Inc. (37%), Idemitsu Uranium Exploration Canada Ltd.(8%) and Tepco Resources Inc. (5%).
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 12pt"><B>Item&nbsp;6 &#151; Reliance on subsection 7.1(2) or (3)&nbsp;of National Instrument 51-102.</B>
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt">Not applicable.
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 12pt"><B>Item&nbsp;7 &#151; Omitted Information</B>
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt">Not applicable.
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 12pt"><B>Item&nbsp;8 &#151; Executive Officer</B>
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt">Gary M.S. Chad<BR>
Senior Vice-President, Governance, Legal and Regulatory Affairs, and
Corporate Secretary<BR>
Cameco Corporation<BR>
(306)&nbsp;956-6303
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 12pt"><B>Item&nbsp;9 &#151; Date of Report</B>
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt"><B>November&nbsp;1, 2006.</B>
</DIV>


<P align="center" style="font-size: 10pt"><!-- Folio -->4<!-- /Folio -->
</DIV>


</BODY>
</HTML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
-----END PRIVACY-ENHANCED MESSAGE-----
