Filed by Black Hills Corporation
                                       Pursuant to Rule 425 under the
                                       Securities Act of 1933
                                       and deemed filed pursuant to Rule 14a-12
                                       of the Securities Exchange Act of 1934


                                       Subject Company:  Black Hills Corporation

                                       Commission File No.:  333-101576


The following press release was made by Black Hills Corporation:


FOR IMMEDIATE RELEASE

Contact: Mark T. Thies                              Peter H. Blum
         Sr. Vice President and CFO                 Executive Vice President
         Black Hills Corporation                    Mallon Resources Corporation
         (605) 721-2331                             (303) 293-2333


                  BLACK HILLS CORPORATION AND MALLON RESOURCES
                          ANNOUNCE S-4 FILING TO MERGE

RAPID CITY,  SD--December 2, 2002--Black Hills Corporation  (NYSE: BKH) and
Mallon  Resources  Corporation  (OTCBB:  MLRC)  announced  today that a Form S-4
Registration  Statement was filed with the Securities and Exchange Commission on
November 29, 2002, in accordance with their plan to merge.

     Through  the  merger,   Black  Hills  Acquisition   Corp.,  a  wholly-owned
subsidiary  of Black Hills  Corporation,  will merge with and into Mallon.  Upon
consummation  of  the  merger,  Mallon  will  be  the  surviving  company  and a
wholly-owned  subsidiary  of Black Hills  Corporation.  A Merger  Agreement  was
approved by both companies' Boards of Directors, under which Mallon shareholders
will  receive  0.044 of a share  of  Black  Hills  for  each  share  of  Mallon.
Completion of the merger,  which is subject to customary  conditions,  including
approval by the  shareholders  of Mallon,  is  expected in the first  quarter of
2003.  The total cost of the  transaction  is estimated  at $52  million,  which
includes  the  $30.5  million  acquisition  in  October  2002 by Black  Hills of
Mallon's debt to Aquila Energy Capital Corporation, along with the settlement of
certain outstanding natural gas price hedges.

     Black Hills  Corporation  (www.blackhillscorp.com)  is a diverse energy and
communications company. Oil and gas operations,  conducted in nine states with a
concentration of resources in the Rocky Mountain  region,  are part of the Black
Hills


                                       1


Energy,  the integrated energy business unit which generates  electricity,
produces  natural gas, oil and coal and markets energy.  Other business units of
Black Hills  Corporation  include Black Hills Power, an electric utility serving
western South Dakota,  northeastern Wyoming and southeastern  Montana; and Black
Hills FiberCom, a broadband  communications  company offering bundled telephone,
high speed  Internet and cable  entertainment  services  exclusively  in western
South Dakota. Mallon Resources Corporation is a Denver,  Colorado, based oil and
gas exploration and production company operating primarily in the San Juan Basin
of New Mexico.



INVESTOR NOTICES

     Investors  and  security  holders  are  advised  to read  the  joint  proxy
statement/prospectus  in the  Registration  Statement on Form S-4 filed with the
SEC in connection with the proposed merger.

     Investors  and  security  holders may obtain a free copy of the joint proxy
statement/prospectus  and other  documents  filed by Black Hills and Mallon with
the   SEC  at  the   SEC's   web   site  at   www.sec.gov.   The   joint   proxy
statement/prospectus and such other documents (relating to Black Hills) may also
be obtained for free from Black Hills by directing  such request to: Black Hills
Corporation,  P.O. Box 1400, 625 Ninth Street,  Rapid City,  South Dakota 57709,
Attention: Steven J. Helmers, General Counsel; telephone:  605-721-2300;  email:
shelmers@bh-corp.com.  The  joint  proxy  statement/prospectus  and  such  other
documents  (relating  to Mallon)  may also be  obtained  for free from Mallon by
directing such request to: Mallon Resources Corporation,  999 18th Street, Suite
1700,  Denver,  Colorado 80202,  Attn: Peter H. Blum,  Executive Vice President;
telephone: 303-293-2333.

     Mallon, its directors, executive officers and certain members of management
and employees may be considered  "participants  in the  solicitation" of proxies
from Mallon's shareholders in connection with the merger.  Information regarding
such  persons and a  description  of their  interests  in the merger and related
transactions are contained in the Registration Statement on Form S-4.


CAUTION REGARDING FORWARD-LOOKING STATEMENTS

     Some of the statements in this release include "forward-looking statements"
as defined by the  Securities  and  Exchange  Commission,  or SEC.  Black  Hills
Corporation  makes  these  forward-looking  statements  in  reliance on the safe
harbor protections  provided under the Private Securities  Litigation Reform Act
of 1995. All statements,  other than statements of historical facts, included in
this release that address  activities,  events or developments  that Black Hills
expects,   believes  or  anticipates  will  or  may  occur  in  the  future  are
forward-looking  statements.  These  forward-looking  statements  are  based  on


                                       2


assumptions,  which  Black  Hills  believes  are  reasonable  based  on  current
expectations  and  projections  about future events and industry  conditions and
trends  affecting  Black Hills'  business.  However,  whether actual results and
developments  will  conform to Black  Hills'  expectations  and  predictions  is
subject to a number of risks and  uncertainties  that could cause actual results
to differ  materially  from those contained in the  forward-looking  statements,
including,  among other things:  (1)  unanticipated  developments in the western
power markets, including unanticipated governmental intervention,  deterioration
in the  financial  condition  of  counterparties,  default on  amounts  due from
counterparties, adverse changes in current or future litigation, adverse changes
in the tariffs of the California Independent System Operator,  market disruption
and  adverse  changes in energy and  commodity  supply,  volume and  pricing and
interest rates; (2) prevailing governmental policies and regulatory actions with
respect to allowed rates of return, industry and rate structure, acquisition and
disposal  of  assets  and  facilities,   operation  and  construction  of  plant
facilities,  recovery of  purchased  power and other  capital  investments,  and
present  or  prospective  wholesale  and  retail  competition;  (3) the State of
California's  efforts to reform its  long-term  power  purchase  contracts;  (4)
impact  of  environmental   and  safety  laws;  (5)  weather   conditions;   (6)
competition;  (7) pricing and transportation of commodities;  (8) market demand,
including  structural  market changes;  (9)  unanticipated  changes in operating
expenses or capital expenditures; (10) capital market conditions; (11) legal and
administrative   proceedings   that   influence   Black   Hills'   business  and
profitability; (12) the effects on Black Hills' business of terrorist actions or
responses to such actions;  (13) the effects on Black Hills' business  resulting
from the financial  difficulties of Enron and other energy companies,  including
their effects on liquidity in the trading and power  industry,  and Black Hills'
ability to access the  capital  markets  on the same  favorable  terms as in the
past; (14) the effects on Black Hills' business in connection with a lowering of
Black  Hills'  credit  rating (or  actions  Black  Hills may take in response to
changing credit ratings criteria),  including, increased collateral requirements
to execute Black Hills' business plan, demands for increased collateral by Black
Hills'  current  counter-parties,  refusal by Black Hills'  current or potential
counterparties  or  customers  to enter into  transactions  with Black Hills and
Black  Hills'  inability  to obtain  credit or  capital  in  amounts or on terms
favorable to Black Hills; and (15) other factors  discussed from time to time in
Black Hills' filings with the SEC.

     This information  contains  forward-looking  statements and forecasts,  the
realization of which cannot be assured by Mallon Resources  Corporation.  Actual
results may differ  significantly from those forecast.  Inaccurate  geologic and
engineering interpretations, the volatility of commodity prices, unbudgeted cost
increases,  unforeseen  delays in  operations,  and  operations  that prove less
successful  than  anticipated are risks that can  significantly  affect Mallon's
operations.  These and other risk  factors  that affect  Mallon's  business  are
discussed in Mallon's Annual Report on Form 10-K.


                                 End of Release


                                       3