SECURITIES AND EXCHANGE COMMISSION
                              WASHINGTON, DC 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 16, 2005



                                  ALLETE, INC.
             (Exact name of registrant as specified in its charter)

           MINNESOTA                 1-3548                       41-0418150
        (State or other           (Commission                   (IRS Employer
jurisdiction of incorporation     File Number)               Identification No.)
       or organization)

                             30 WEST SUPERIOR STREET
                          DULUTH, MINNESOTA 55802-2093
          (Address of principal executive offices, including zip code)

                                 (218) 279-5000
              (Registrant's telephone number, including area code)



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:

/ / Written communications pursuant to Rule 425 under the Securities Act (17 CFR
    230.425)
/ / Soliciting material  pursuant to Rule 14a-12 under the  Exchange Act (17 CFR
    240.14a-12)
/ / Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange
    Act (17 CFR 240.14d-2(b))
/ / Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange
    Act (17 CFR 240.13e-4(c))



SECTION 1 - REGISTRANT'S BUSINESS AND OPERATIONS

ITEM 1.01 ENTRY INTO A MATERIAL DEFINITIVE AGREEMENT

On December 16,  2005,  ALLETE,  Inc.  (ALLETE)  entered into an agreement  with
Wisconsin Public Service Corporation and WPS Investments,  LLC that provides for
ALLETE,  through its  Wisconsin  subsidiary  Rainy  River  Energy  Corporation -
Wisconsin,  to invest $60 million in cash in American  Transmission  Company LLC
(ATC) by the end of 2006.  ALLETE's  investment will represent an estimated nine
percent ownership interest in ATC. The investment by ALLETE's  subsidiary in ATC
is subject to review by the Public Service Commission of Wisconsin.

ATC is a  Wisconsin-based  public  utility  that  owns  and  maintains  electric
transmission assets in parts of Wisconsin,  Michigan and Illinois.  ATC provides
transmission  service  under rates  regulated by the Federal  Energy  Regulatory
Commission  (FERC) that are set to further the FERC's policy of establishing the
independent   operation  and  ownership  of,  and  investment  in,  transmission
facilities. The FERC approved the transaction on December 16, 2005.

The agreement dated December 16, 2005,  among ALLETE,  Wisconsin  Public Service
Corporation and WPS Investments, LLC is filed as Exhibit 10 to this Form 8-K and
incorporated by reference herein.


SECTION 9 - FINANCIAL STATEMENTS AND EXHIBITS

ITEM 9.01 FINANCIAL STATEMENTS AND EXHIBITS

(a)  Financial Statements of Business Acquired - Not applicable

(b)  Pro Forma Financial Information - Not applicable

(c)  Exhibits

     Exhibit
     Number
     ------

       10 - Agreement  (without  Exhibit) dated December 16, 2005, among ALLETE,
            Wisconsin Public Service Corporation and WPS Investments, LLC.



                        -------------------------------

READERS  ARE  CAUTIONED  THAT  FORWARD-LOOKING  STATEMENTS  SHOULD  BE  READ  IN
CONJUNCTION WITH ALLETE'S DISCLOSURES UNDER THE HEADING:  "SAFE HARBOR STATEMENT
UNDER THE PRIVATE SECURITIES LITIGATION REFORM ACT OF 1995" LOCATED ON PAGE 2 OF
THIS FORM 8-K.

                    ALLETE Form 8-K dated December 21, 2005                    1



                              SAFE HARBOR STATEMENT
           UNDER THE PRIVATE SECURITIES LITIGATION REFORM ACT OF 1995

In  connection  with  the  safe  harbor  provisions  of the  Private  Securities
Litigation  Reform Act of 1995,  ALLETE is hereby filing  cautionary  statements
identifying important factors that could cause ALLETE's actual results to differ
materially from those projected in  forward-looking  statements (as such term is
defined in the Private  Securities  Litigation Reform Act of 1995) made by or on
behalf of ALLETE in this  Current  Report  on Form  8-K,  in  presentations,  in
response to questions or otherwise.  Any  statements  that  express,  or involve
discussions  as to  expectations,  beliefs,  plans,  objectives,  assumptions or
future events or performance (often, but not always, through the use of words or
phrases such as "anticipates,"  "believes,"  "estimates,"  "expects," "intends,"
"plans,"  "projects,"  "will likely  result," "will  continue,"  "could," "may,"
"potential,"  "target," "outlook" or similar  expressions) are not statements of
historical facts and may be forward-looking.

Forward-looking   statements   involve   estimates,   assumptions,   risks   and
uncertainties  and are  qualified  in their  entirety by  reference  to, and are
accompanied by, the following  important factors, in addition to any assumptions
and  other  factors   referred  to   specifically   in   connection   with  such
forward-looking   statements,   which  are   difficult   to   predict,   contain
uncertainties,  are beyond  ALLETE's  control  and may cause  actual  results or
outcomes  to  differ   materially  from  those   contained  in   forward-looking
statements:

     -  ALLETE's ability to successfully implement its strategic objectives;
     -  prevailing governmental policies and regulatory actions, including those
        of the United States Congress,  state  legislatures,  the Federal Energy
        Regulatory  Commission,  the Minnesota Public Utilities Commission,  the
        Florida Public  Service  Commission,  the Public  Service  Commission of
        Wisconsin,   and  various   local  and  county   regulators,   and  city
        administrators,  about allowed rates of return, financings, industry and
        rate structure,  acquisition and disposal of assets and facilities, real
        estate  development,  operation and  construction  of plant  facilities,
        recovery  of  purchased  power  and  capital  investments,   present  or
        prospective wholesale and retail competition  (including but not limited
        to  transmission  costs),  and  zoning and  permitting  of land held for
        resale;
     -  effects of restructuring initiatives in the electric industry;
     -  economic and geographic factors, including political and economic risks;
     -  changes  in and  compliance  with  environmental  and  safety  laws  and
        policies;
     -  weather conditions;
     -  natural disasters;
     -  war and acts of terrorism;
     -  wholesale power market conditions;
     -  population growth rates and demographic patterns;
     -  the  effects  of  competition,  including  competition  for  retail  and
        wholesale customers;
     -  pricing and transportation of commodities;
     -  changes in tax rates or policies or in rates of inflation;
     -  unanticipated project delays or changes in project costs;
     -  unanticipated changes in operating expenses and capital expenditures;
     -  global and domestic economic conditions;
     -  our ability to access capital markets;
     -  changes in interest rates and the performance of the financial markets;
     -  competition for economic expansion or development opportunities;
     -  ALLETE's ability to manage expansion and integrate acquisitions; and
     -  the outcome of legal and  administrative  proceedings  (whether civil or
        criminal) and settlements that affect the business and  profitability of
        ALLETE.

Additional  disclosures  regarding factors that could cause ALLETE's results and
performance to differ from results or performance anticipated by this report are
discussed  under the heading  "Factors that May Affect Future Results" in Item 7
of ALLETE's 2004 Form 10-K and Item 2 of its Form 10-Q for the quarterly  period
ended September 30, 2005. Any  forward-looking  statement  speaks only as of the
date on which such  statement is made,  and ALLETE  undertakes  no obligation to
update any  forward-looking  statement to reflect events or circumstances  after
the date on  which  that  statement  is made or to  reflect  the  occurrence  of
unanticipated  events.  New  factors  emerge  from  time to  time  and it is not
possible for management to predict all of these  factors,  nor can it assess the
impact of each of these  factors  on the  businesses  of ALLETE or the extent to
which any factor, or combination of factors,  may cause actual results to differ
materially from those contained in any  forward-looking  statement.  Readers are
urged to carefully review and consider the various disclosures made by ALLETE in
its 2004 Form 10-K and in ALLETE's  other reports filed with the  Securities and
Exchange  Commission  that attempt to advise  interested  parties of the factors
that may affect ALLETE's business.

2                   ALLETE Form 8-K dated December 21, 2005



                                   SIGNATURES

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.



                                                   ALLETE, Inc.



December 21, 2005                               James K. Vizanko
                               -------------------------------------------------
                                                James K. Vizanko
                               Senior Vice President and Chief Financial Officer



                    ALLETE Form 8-K dated December 21, 2005                    3



                                  EXHIBIT INDEX

EXHIBIT
NUMBER
--------------------------------------------------------------------------------

  10 - Agreement  (without  Exhibit)  dated  December 16, 2005,  among ALLETE,
       Wisconsin  Public  Service  Corporation  and WPS Investments, LLC.



                    ALLETE Form 8-K dated December 21, 2005