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<TITLE>Filed by Bowne Pure Compliance</TITLE>
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<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): February 26, 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>Arizona</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>Arizona</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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<P align="left" style="font-size: 10pt">&nbsp;
<BR>
<U><B>Item</B></U> <U><B>2.02 Results of Operations and Financial Condition</B></U>

&nbsp;

<P align="left" style="font-size: 10pt; text-indent: 3%">On February&nbsp;26, 2009, UniSource Energy Corporation (&#147;UniSource Energy&#148;) issued a press release announcing earnings
for the quarter and twelve months ended December&nbsp;31, 2008 for UniSource Energy and Tucson Electric Power Company.&nbsp;&nbsp;A
copy of the press release is attached hereto as Exhibit&nbsp;99.1. UniSource Energy also posted supplemental information
accessible from a link on its website, <U>www.uns.com</U>. A copy of the supplemental information is attached hereto
as Exhibit&nbsp;99.2.


<P align="left" style="font-size: 10pt; text-indent: 3%">The Company&#146;s press releases and other communications may include certain non-Generally Accepted Accounting
Principles (GAAP)&nbsp;financial measures. A &#147;non-GAAP financial measure&#148; is defined as a numerical measure of a company&#146;s
financial performance, financial position or cash flows that excludes (or includes) amounts that are included in (or
excluded from) the most directly comparable measure calculated and presented in accordance with GAAP in the Company&#146;s
financial statements.


<P align="left" style="font-size: 10pt; text-indent: 3%">Non-GAAP financial measures utilized by the Company include presentations of revenues, operating expenses,
operating income and earnings (loss)&nbsp;per share. The Company uses these non-GAAP measures to evaluate the operations of
the Company. Certain non-GAAP financial measures utilized by the Company exclude: the impact of non-recurring items:
the effect of accounting changes or adjustments; expenses that are reimbursed by third parties; and other items. The
Company&#146;s management believes that these non-GAAP financial measures provide useful information to investors by
removing the effect of variances in GAAP reported results of operations that are not indicative of fundamental changes
in the earnings or cash flow capacity of the Company&#146;s operations. Management also believes that the presentation of
the non-GAAP financial measures is largely consistent with its past practice, as well as industry practice in general,
and will enable investors and analysts to compare current non-GAAP measures with non-GAAP measures with respect to
prior periods.


<P align="left" style="font-size: 10pt">

<U><B>Item&nbsp;9.01 Financial Statements and Exhibits</B></U>




<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 Press Release, dated February&nbsp;26, 2009.</TD>
</TR>

</TABLE>


<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;99.2</TD>
    <TD width="3%">&nbsp;</TD>
    <TD> Supplement earnings and outlook information posted on UniSource Energy&#146;s website, dated February
26, 2009.</TD>
</TR>

</TABLE>


<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: February 26, 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: February&nbsp;26, 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 Press Release, dated February&nbsp;26, 2009.</TD>
</TR>

</TABLE>


<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;99.2</TD>
    <TD width="3%">&nbsp;</TD>
    <TD> Supplement earnings and outlook information posted on UniSource Energy&#146;s website, dated February
26, 2009.</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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Filed by Bowne Pure Compliance
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): February 26, 2009
UNISOURCE ENERGY CORPORATION
(Exact name of registrant as specified in its charter)
Arizona
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)
Arizona
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
2.02 Results of Operations and Financial Condition
On February 26, 2009, UniSource Energy Corporation ("UniSource Energy") issued a press release announcing earnings
for the quarter and twelve months ended December 31, 2008 for UniSource Energy and Tucson Electric Power Company.  A
copy of the press release is attached hereto as Exhibit 99.1. UniSource Energy also posted supplemental information
accessible from a link on its website,
www.uns.com
. A copy of the supplemental information is attached hereto
as Exhibit 99.2.
The Company's press releases and other communications may include certain non-Generally Accepted Accounting
Principles (GAAP) financial measures. A "non-GAAP financial measure" is defined as a numerical measure of a company's
financial performance, financial position or cash flows that excludes (or includes) amounts that are included in (or
excluded from) the most directly comparable measure calculated and presented in accordance with GAAP in the Company's
financial statements.
Non-GAAP financial measures utilized by the Company include presentations of revenues, operating expenses,
operating income and earnings (loss) per share. The Company uses these non-GAAP measures to evaluate the operations of
the Company. Certain non-GAAP financial measures utilized by the Company exclude: the impact of non-recurring items:
the effect of accounting changes or adjustments; expenses that are reimbursed by third parties; and other items. The
Company's management believes that these non-GAAP financial measures provide useful information to investors by
removing the effect of variances in GAAP reported results of operations that are not indicative of fundamental changes
in the earnings or cash flow capacity of the Company's operations. Management also believes that the presentation of
the non-GAAP financial measures is largely consistent with its past practice, as well as industry practice in general,
and will enable investors and analysts to compare current non-GAAP measures with non-GAAP measures with respect to
prior periods.
Item 9.01 Financial Statements and Exhibits
Exhibit 99.1
UniSource Energy Corporation Press Release, dated February 26, 2009.
Exhibit 99.2
Supplement earnings and outlook information posted on UniSource Energy's website, dated February
26, 2009.
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: February 26, 2009
(Registrant)
/s/   Kevin P. Larson
Senior Vice President and Principal Financial Officer
Date: February 26, 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 Press Release, dated February 26, 2009.
Exhibit 99.2
Supplement earnings and outlook information posted on UniSource Energy's website, dated February
26, 2009.