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<TITLE>Form 8-K</TITLE>
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<DIV style="width: 100%; border-bottom: 1pt solid black; font-size: 1pt">&nbsp;</DIV>


<P align="center" style="font-size: 14pt"><B>UNITED STATES<BR>
SECURITIES AND EXCHANGE COMMISSION<BR>
<FONT style="font-size: 12pt">Washington, D.C. 20549
</FONT></B>

<P align="center" style="font-size: 18pt"><B>FORM 8-K</B>

<P align="center" style="font-size: 12pt"><B>CURRENT REPORT<BR>
Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934</B>

<P align="center" style="font-size: 10pt"><B>Date of Report (Date of earliest event reported): March 23, 2009</B>





<P align="center">

<P align="center" style="font-size: 24pt"><B>UNISOURCE ENERGY CORPORATION</B><BR>
<FONT style="font-size: 10pt">(Exact name of registrant as specified in its charter)
</FONT>

<TABLE border="0" width="100%" cellspacing="0" cellpadding="0" style="font-size: 10pt; text-align: center">
<TR>
    <TD width="32%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="33%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="32%">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD style="border-bottom: 1px solid #000000"><B>(An Arizona Corporation)</B></TD>
    <TD>&nbsp;</TD>
    <TD style="border-bottom: 1px solid #000000"><B>1-13739</B></TD>
    <TD>&nbsp;</TD>
    <TD style="border-bottom: 1px solid #000000"><B>86-0786732</B></TD>
</TR>
<TR valign="top">
    <TD>(State or other Jurisdiction of Incorporation)</TD>
    <TD>&nbsp;</TD>
    <TD>(Commission File Number)</TD>
    <TD>&nbsp;</TD>
    <TD>(IRS Employer Identification No.)</TD>
</TR>
</TABLE>

<TABLE border="0" width="100%" cellspacing="0" cellpadding="0" style="font-size: 10pt; text-align: center">
<TR>
    <TD width="49%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="49%">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD style="border-bottom: 1px solid #000000"><B>One South Church Avenue, Suite 100<BR>Tucson, AZ</B></TD>
    <TD>&nbsp;</TD>
    <TD style="border-bottom: 1px solid #000000"><B>85701</B></TD>
</TR>
<TR valign="top">
    <TD>(Address of Principal Executive Offices)</TD>
    <TD>&nbsp;</TD>
    <TD>(Zip Code)</TD>
</TR>
</TABLE>

<P align="center" style="font-size: 10pt">Registrant&#146;s telephone number, including area code: <B>(520) 571-4000</B>


<TABLE border="0" width="30%" cellspacing="0" cellpadding="0" style="font-size: 10pt; text-align: center">
<TR>
    <TD width="100%">&nbsp;</TD>
</TR>
<TR>
    <TD nowrap style="border-bottom: 1px solid #000000"><B>&nbsp;</B></TD>
</TR>
<TR>
    <TD nowrap>(Former name or former address if changed since last report.)</TD>
</TR>
</TABLE>







<P align="center">

<P align="center" style="font-size: 24pt"><B>TUCSON ELECTRIC POWER COMPANY</B><BR>
<FONT style="font-size: 10pt">(Exact name of registrant as specified in its charter)
</FONT>

<TABLE border="0" width="100%" cellspacing="0" cellpadding="0" style="font-size: 10pt; text-align: center">
<TR>
    <TD width="32%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="33%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="32%">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD style="border-bottom: 1px solid #000000"><B>(An Arizona Corporation)</B></TD>
    <TD>&nbsp;</TD>
    <TD style="border-bottom: 1px solid #000000"><B>1-5924  </B></TD>
    <TD>&nbsp;</TD>
    <TD style="border-bottom: 1px solid #000000"><B>86-0062700</B></TD>
</TR>
<TR valign="top">
    <TD>(State or other Jurisdiction of Incorporation)</TD>
    <TD>&nbsp;</TD>
    <TD>(Commission File Number)</TD>
    <TD>&nbsp;</TD>
    <TD>(IRS Employer Identification No.)</TD>
</TR>
</TABLE>

<TABLE border="0" width="100%" cellspacing="0" cellpadding="0" style="font-size: 10pt; text-align: center">
<TR>
    <TD width="49%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="49%">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD style="border-bottom: 1px solid #000000"><B>One South Church Avenue, Suite 100<BR>Tucson, AZ</B></TD>
    <TD>&nbsp;</TD>
    <TD style="border-bottom: 1px solid #000000"><B>85701</B></TD>
</TR>
<TR valign="top">
    <TD>(Address of Principal Executive Offices)</TD>
    <TD>&nbsp;</TD>
    <TD>(Zip Code)</TD>
</TR>
</TABLE>

<P align="center" style="font-size: 10pt">Registrant&#146;s telephone number, including area code: <B>(520) 571-4000</B>


<TABLE border="0" width="30%" cellspacing="0" cellpadding="0" style="font-size: 10pt; text-align: center">
<TR>
    <TD width="100%">&nbsp;</TD>
</TR>
<TR>
    <TD nowrap style="border-bottom: 1px solid #000000"><B>&nbsp;</B></TD>
</TR>
<TR>
    <TD nowrap>(Former name or former address if changed since last report.)</TD>
</TR>
</TABLE>





<P align="left" style="font-size: 10pt">Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant
under any of the following provisions:

<P align="left" style="font-size: 10pt">
<FONT face="Wingdings">&#111;</FONT> Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)<BR><BR>
<FONT face="Wingdings">&#111;</FONT> Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)<BR><BR>
<FONT face="Wingdings">&#111;</FONT> Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))<BR><BR>
<FONT face="Wingdings">&#111;</FONT> Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))<BR>


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

<P align="center" style="font-size: 10pt; display: none">1
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<DIV align="justify" style="font-size: 10pt; margin-top: 10pt"><B><U>Item&nbsp;7.01 Regulation&nbsp;FD Disclosure</U></B>
</DIV>


<DIV align="justify" style="font-size: 10pt; margin-top: 10pt">UniSource
Energy Corporation is making presentations to investors and analysts
on March&nbsp;24, 2009. Copies of the presentation will be made available to such investors and analysts as
early as March&nbsp;23, 2009. The presentation will also be available at
<U>http://ir.uns.com/presentations.cfm</U>, beginning on March&nbsp;23, 2009. The presentation is attached
hereto as Exhibit&nbsp;99.1.
</DIV>

<DIV align="justify" style="font-size: 10pt; margin-top: 10pt"><U><B>Item&nbsp;9.01 Financial Statements and Exhibits</B></U>
</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="12%">&nbsp;</TD>
    <TD width="3%">&nbsp;</TD>
    <TD width="85%">&nbsp;</TD>
</TR>

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<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">Exhibit&nbsp;99.1
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">UniSource Energy Corporation
Presentation to Investors and Analysts</TD>
</TR>
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</DIV>


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

<P align="center" style="font-size: 10pt; display: none">2
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<P align="center" style="font-size: 10pt"><B>SIGNATURES</B>





<P align="left" style="font-size: 10pt; text-indent: 3%">Pursuant to the requirements of the Securities Exchange Act of 1934, each registrant has duly caused this report
to be signed on its behalf by the undersigned thereunto duly authorized.


<P align="left" style="font-size: 10pt">&nbsp;
<BR>
&nbsp;

<DIV align="center">
<TABLE style="font-size: 10pt" cellspacing="0" border="0" cellpadding="0" width="100%">
<!-- Begin Table Head -->
<TR valign="bottom">
    <TD width="45%">&nbsp;</TD>
    <TD width="10%">&nbsp;</TD>
    <TD width="45%">&nbsp;</TD>
</TR>
<TR style="font-size: 10pt" valign="bottom">
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" style="border-bottom: 1px solid #000000"><B>UNISOURCE ENERGY CORPORATION</B></TD>
</TR>
<TR style="font-size: 10pt" valign="bottom">
    <TD nowrap align="left">Date: March 23, 2009</TD>
    <TD>&nbsp;</TD>
    <TD align="center">(Registrant)</TD>
</TR>

<!-- End Table Head -->
<!-- Begin Table Body -->
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top"></TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">
&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">/s/&nbsp;&nbsp;&nbsp;Kevin P. Larson</TD>
</TR>
<TR style="font-size: 1px">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top" style="border-top: 1px solid #000000">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">
&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">Senior Vice President and Principal Financial Officer</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top"></TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">Date: March&nbsp;23, 2009
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top"><B>TUCSON ELECTRIC POWER COMPANY</B></TD>
</TR>
<TR style="font-size: 1px">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">
&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top" style="border-top: 1px solid #000000">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">
&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">(Registrant)</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top"></TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">
&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">/s/&nbsp;&nbsp;&nbsp;Kevin P. Larson</TD>
</TR>
<TR style="font-size: 1px">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">
&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top" style="border-top: 1px solid #000000">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">
&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">Senior Vice President and Principal Financial Officer</TD>
</TR>
<!-- End Table Body -->
</TABLE>
</DIV>


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

<P align="center" style="font-size: 10pt; display: none">3




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<P align="center" style="font-size: 10pt"><B>EXHIBIT INDEX</B>





<P>
<TABLE width="100%" border="0" cellpadding="0" cellspacing="0" style="font-size: 10pt">

<TR valign="top" style="font-size: 10pt; color: #000000; background: transparent">
    <TD width="3%" style="background: transparent">&nbsp;</TD>
    <TD width="3%" nowrap align="left">Exhibit&nbsp;99.1</TD>
    <TD width="3%">&nbsp;</TD>
    <TD> UniSource Energy Corporation Presentation to Investors and Analysts</TD>
</TR>

</TABLE>







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

<P align="center" style="font-size: 10pt; display: none">4




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Form 8-K
UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
FORM 8-K
CURRENT REPORT
Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934
Date of Report (Date of earliest event reported): March 23, 2009
UNISOURCE ENERGY CORPORATION
(Exact name of registrant as specified in its charter)
(An Arizona Corporation)
1-13739
86-0786732
(State or other Jurisdiction of Incorporation)
(Commission File Number)
(IRS Employer Identification No.)
One South Church Avenue, Suite 100
Tucson, AZ
85701
(Address of Principal Executive Offices)
(Zip Code)
Registrant's telephone number, including area code:
(520) 571-4000
(Former name or former address if changed since last report.)
TUCSON ELECTRIC POWER COMPANY
(Exact name of registrant as specified in its charter)
(An Arizona Corporation)
1-5924
86-0062700
(State or other Jurisdiction of Incorporation)
(Commission File Number)
(IRS Employer Identification No.)
One South Church Avenue, Suite 100
Tucson, AZ
85701
(Address of Principal Executive Offices)
(Zip Code)
Registrant's telephone number, including area code:
(520) 571-4000
(Former name or former address if changed since last report.)
Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant
under any of the following provisions:
o
Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)
o
Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)
o
Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))
o
Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))
Item 7.01 Regulation FD Disclosure
UniSource
Energy Corporation is making presentations to investors and analysts
on March 24, 2009. Copies of the presentation will be made available to such investors and analysts as
early as March 23, 2009. The presentation will also be available at
http://ir.uns.com/presentations.cfm
, beginning on March 23, 2009. The presentation is attached
hereto as Exhibit 99.1.
Item 9.01 Financial Statements and Exhibits
Exhibit 99.1
UniSource Energy Corporation
Presentation to Investors and Analysts
SIGNATURES
Pursuant to the requirements of the Securities Exchange Act of 1934, each registrant has duly caused this report
to be signed on its behalf by the undersigned thereunto duly authorized.
UNISOURCE ENERGY CORPORATION
Date: March 23, 2009
(Registrant)
/s/   Kevin P. Larson
Senior Vice President and Principal Financial Officer
Date: March 23, 2009
TUCSON ELECTRIC POWER COMPANY
(Registrant)
/s/   Kevin P. Larson
Senior Vice President and Principal Financial Officer
EXHIBIT INDEX
Exhibit 99.1
UniSource Energy Corporation Presentation to Investors and Analysts