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

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

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

<P style="font-size: 10pt" align="center"><B>Date of Report (Date of earliest
event reported): December 9, 2008</B>



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


<TABLE style="font-size: 10pt; text-align: center" cellspacing="0" cellpadding="0" width="100%" border="0">

 <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: #000000 1px solid"><B>(An Arizona Corporation)</B></TD>
  <TD>&nbsp;</TD>
  <TD style="border-bottom: #000000 1px solid"><B>1-13739</B></TD>
  <TD>&nbsp;</TD>
  <TD style="border-bottom: #000000 1px solid"><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>
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  <TD width="49%">&nbsp;</TD>
  <TD width="1%">&nbsp;</TD>
  <TD width="49%">&nbsp;</TD>
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 <TR valign="bottom">
  <TD style="border-bottom: #000000 1px solid"><B>One South Church Avenue, Suite 100<BR>Tucson, AZ</B></TD>
  <TD>&nbsp;</TD>
  <TD style="border-bottom: #000000 1px solid"><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 style="font-size: 10pt" align="center">Registrant&#8217;s telephone number, including area code: <B>(520) 571-4000</B>

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 </TR>
 <TR>
  <TD style="border-bottom: #000000 1px solid" nowrap><B>&nbsp;</B></TD>
 </TR>
 <TR>
  <TD nowrap>(Former name or former address if changed since last report.)</TD>
 </TR>

</TABLE>


<P style="font-size: 24pt" align="center"><B>TUCSON ELECTRIC POWER COMPANY</B><BR> <FONT style="font-size: 10pt">(Exact name of registrant as
specified in its charter) </FONT>
<TABLE style="font-size: 10pt; text-align: center" cellspacing="0" cellpadding="0" width="100%" border="0">

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  <TD width="32%">&nbsp;</TD>
  <TD width="1%">&nbsp;</TD>
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  <TD style="border-bottom: #000000 1px solid"><B>(An Arizona Corporation)</B></TD>
  <TD>&nbsp;</TD>
  <TD style="border-bottom: #000000 1px solid"><B>1-5924</B></TD>
  <TD>&nbsp;</TD>
  <TD style="border-bottom: #000000 1px solid"><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 style="font-size: 10pt; text-align: center" cellspacing="0" cellpadding="0" width="100%" border="0">

 <TR>
  <TD width="49%">&nbsp;</TD>
  <TD width="1%">&nbsp;</TD>
  <TD width="49%">&nbsp;</TD>
 </TR>
 <TR valign="bottom">
  <TD style="border-bottom: #000000 1px solid"><B>One South Church Avenue, Suite 100<BR>Tucson, AZ</B></TD>
  <TD>&nbsp;</TD>
  <TD style="border-bottom: #000000 1px solid"><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 style="font-size: 10pt" align="center">Registrant&#8217;s telephone number, including area code: <B>(520) 571-4000</B>
<TABLE style="font-size: 10pt; text-align: center" cellspacing="0" cellpadding="0" width="30%" border="0">


 <TR>
  <TD width="100%">&nbsp;</TD>
 </TR>
 <TR>
  <TD style="border-bottom: #000000 1px solid" nowrap><B>&nbsp;</B></TD>
 </TR>
 <TR>
  <TD nowrap>(Former name or former address if changed since last report.)</TD>
 </TR>

</TABLE>




<P style="font-size: 10pt" align="left">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 style="font-size: 10pt" align="left"><FONT face="Wingdings">o</FONT> Written
communications pursuant to Rule 425 under the Securities Act (17 CFR
230.425)<BR>
<BR>
<FONT face="Wingdings">o</FONT> Soliciting material pursuant
to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)<BR>
<BR>
<FONT
face="Wingdings">o</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">o</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 style="display: none; font-size: 10pt" align="center">1
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<P style="font-size: 10pt" align="left"><U><B>Item&nbsp;5.02. Departure of
Directors or Certain Officers; Election of Directors; Appointment of Certain
Officers; Compensatory Arrangements of Certain Officers.</B></U>

<P style="font-size: 10pt" align="left">On December&nbsp;9, 2008, Kenneth
Handy, Board Member of UniSource Energy Corporation (UniSource Energy) and
Tucson Electric Power Company (TEP)&nbsp;announced his retirement from the
board of directors, effective December&nbsp;31, 2008.

<P style="font-size: 10pt" align="left">Mr.&nbsp;Handy has been a board member
of UniSource Energy and TEP since 2001.

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

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

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

<P style="font-size: 10pt" align="left">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">Date: December 12, 2008



<P align="left" style="margin-left:46%; font-size: 10pt; margin-top: -11pt"><U><B>UNISOURCE ENERGY CORPORATION</B></U>
<BR>
(Registrant)



<P align="left" style="margin-left:46%; font-size: 10pt"><U><B>/</B>s/ Kevin P. Larson&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;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</U>
<BR>
Senior Vice President and Chief Financial Officer


<P align="left" style="font-size: 10pt">Date: December 12, 2008



<P align="left" style="margin-left:46%; font-size: 10pt; margin-top: -11pt"><U><B>TUCSON ELECTRIC POWER COMPANY</B></U>
<BR>
(Registrant)



<P align="left" style="margin-left:46%; font-size: 10pt"><U><B>/</B>s/ Kevin P. Larson&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;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</U>
<BR>
Senior Vice President and Chief Financial Officer

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

<P style="display: none; font-size: 10pt" align="center">3
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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): December 9, 2008
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 5.02. Departure of
Directors or Certain Officers; Election of Directors; Appointment of Certain
Officers; Compensatory Arrangements of Certain Officers.
On December 9, 2008, Kenneth
Handy, Board Member of UniSource Energy Corporation (UniSource Energy) and
Tucson Electric Power Company (TEP) announced his retirement from the
board of directors, effective December 31, 2008.
Mr. Handy has been a board member
of UniSource Energy and TEP since 2001.
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.
Date: December 12, 2008
UNISOURCE ENERGY CORPORATION
(Registrant)
/
s/ Kevin P. Larson
Senior Vice President and Chief Financial Officer
Date: December 12, 2008
TUCSON ELECTRIC POWER COMPANY
(Registrant)
/
s/ Kevin P. Larson
Senior Vice President and Chief Financial Officer