UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                  SCHEDULE 13G

                    Under the Securities Exchange Act of 1934
                                (Amendment [X]) *

                                    KFx Inc.
                                (Name of Issuer)

                          Common Stock, $.001 par value
                         (Title of Class of Securities)

                                   48245L 10 7
                                 (CUSIP Number)

                                December 31, 2002
             (Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule
is filed:

[   ]  Rule 13d-1(b)

[ X ]  Rule 13d-1(c)

[   ]  Rule 13d-1(d)


*The  remainder of this cover page shall be filled out for a reporting  person's
initial filing on this form with respect to the subject class of securities, and
for any  subsequent  amendment  containing  information  which  would  alter the
disclosures provided in a prior cover page.

The information required in the remainder of this cover page shall not be deemed
to be "filed" for the purpose of Section 18 of the  Securities  Exchange  Act of
1934 ("Act") or otherwise  subject to the liabilities of that section of the Act
but  shall be  subject  to all other  provisions  of the Act  (however,  see the
Notes).




      1. Names of Reporting Persons.
         I.R.S. Identification Nos. of above persons (entities only).

                   Landrica Development Company
                   Tax ID: 46-0379669

     2.  Check the Appropriate Box if a Member of a Group (See Instructions)

          (a)

          (b)

     3.  SEC Use Only

     4.  Citizenship or Place of Organization

                   South Dakota

                   Number of           5    Sole Voting Power        2,000,000
                    Shares
                 Beneficially          6    Shared Voting Power            -0-
                   Owned by
                     Each
                   Reporting           7    Sole Dispositive Power   2,000,000
                    Person
                     With              8    Shared Dispositive Power       -0-


     9.  Aggregate Amount Beneficially Owned by Each Reporting Person

                 2,000,000

    10.  Check if the Aggregate Amount in Row (9) Excludes Certain Shares

                 N/A

    11.  Percent of Class Represented by Amount in Row (9)

                 5.21%

    12.  Type of Reporting Person

                 CO



      1. Names of Reporting Persons.
         I.R.S. Identification Nos. of above persons (entities only).

                   Wyodak Resources Development Corporation
                   Tax ID: 46-0249273

     2.  Check the Appropriate Box if a Member of a Group (See Instructions)

          (a)

          (b)

     3.  SEC Use Only

     4.  Citizenship or Place of Organization

                 South Dakota

                   Number of            5    Sole Voting Power        2,000,000
                    Shares
                 Beneficially           6    Shared Voting Power            -0-
                   Owned by
                     Each
                   Reporting            7    Sole Dispositive Power   2,000,000
                    Person
                     With               8    Shared Dispositive Power       -0-

     9.  Aggregate Amount Beneficially Owned by Each Reporting Person

                 2,000,000

    10.   Check if the Aggregate Amount in Row (9) Excludes Certain Shares

                 N/A

    11.   Percent of Class Represented by Amount in Row (9)

                 5.21%

    12.   Type of Reporting Person

                 CO




     1.  Names of Reporting Persons.
         I.R.S. Identification Nos. of above persons (entities only).

               Black Hills Energy, Inc.
               Tax ID: 46-0459888

     2.  Check the Appropriate Box if a Member of a Group (See Instructions)

          (a)

          (b)

     3.  SEC Use Only

     4.  Citizenship or Place of Organization

                 South Dakota

                   Number of            5    Sole Voting Power        2,000,000
                    Shares
                 Beneficially           6    Shared Voting Power            -0-
                   Owned by
                     Each
                   Reporting            7    Sole Dispositive Power   2,000,000
                    Person
                     With               8    Shared Dispositive Power       -0-


     9.  Aggregate Amount Beneficially Owned by Each Reporting Person

                 2,000,000

    10.  Check if the Aggregate Amount in Row (9) Excludes Certain Shares

                 N/A

    11.  Percent of Class Represented by Amount in Row (9)

                 5.21%

    12.  Type of Reporting Person

                 CO



     1.  Names of Reporting Persons.
         I.R.S. Identification Nos. of above persons (entities only).

            Black Hills Corporation
            Tax ID: 46-0458824

     2.  Check the Appropriate Box if a Member of a Group (See Instructions)

          (a)

          (b)

     3.  SEC Use Only

     4.  Citizenship or Place of Organization

                South Dakota

                   Number of            5    Sole Voting Power        2,000,000
                    Shares
                 Beneficially           6    Shared Voting Power            -0-
                   Owned by
                     Each
                   Reporting            7    Sole Dispositive Power   2,000,000
                    Person
                     With               8    Shared Dispositive Power       -0-

     9.  Aggregate Amount Beneficially Owned by Each Reporting Person

                 2,000,000

    10.  Check if the Aggregate Amount in Row (9) Excludes Certain Shares

                 N/A

    11.  Percent of Class Represented by Amount in Row (9)

                 5.21%

    12.  Type of Reporting Person

                 CO




Item 1.      (a)  Name of Issuer:   KFx Inc.

             (b)  Address of Issuer's Principal Executive Offices:

                  3300 East 1st Avenue, Suite 290
                  Denver, Colorado  80206

Item 2.      (a)  Name of Person Filing:

                    Landrica Development Company ("Landrica"),  Wyodak Resources
                    Development  Corp.  ("Wyodak"),  Black  Hills  Energy,  Inc.
                    ("Black Hills Energy") and Black Hills  Corporation  ("Black
                    Hills").

                    Landrica is a wholly-owned subsidiary of Wyodak, Wyodak is a
                    wholly-owned  subsidiary  of Black Hills  Energy,  and Black
                    Hills Energy is a wholly-owned subsidiary of Black Hills.

                    Wyodak,  Black Hills Energy and Black Hills may be deemed to
                    beneficially own the shares of KFx Inc. held by Landrica.

                    Wyodak,  Black  Hills  Energy and Black Hills do not own any
                    shares of KFx Inc. outside of Landrica.

             (b)  Address of Principal Business Office:

                    The  business  address of each of  Landrica,  Wyodak,  Black
                    Hills  Energy and Black  Hills is P.O.  Box 1400,  625 Ninth
                    Street, Rapid City, South Dakota 57709.

             (c)  Citizenship:

                    Landrica,   Black   Hills   Energy   and  Black   Hills  are
                    corporations  organized  under South Dakota law. Wyodak is a
                    corporation organized under Delaware law.

             (d)  Title of Class of Securities:   Common Stock, par value $.001

             (e)  CUSIP Number:   48245L 10 7

Item 3.      If this statement is filed pursuant to Section 240.13d-1(b) or
             240.13d-2(b) or (c), check  whether the person filing is a:

             Not applicable



Item 4.      Ownership.

             Provide the following information regarding the aggregate number
             and percentage of the class of securities of the issuer
             identified in Item 1.

               (a)  Amount beneficially owned:         2,000,000*

               (b)  Percent of class:                  5.21%

               (c)  Number of shares as to which the person has:

                  (i)   Sole power to vote or to direct the vote:

                                    2,000,000*

                  (ii)  Shared power to vote or to direct the vote:

                                            -0-

                  (iii) Sole power to dispose or to direct the disposition of:

                                    2,000,000*

                  (iv)  Shared power to dispose or to direct the disposition of:

                                            -0-

*        Includes 1,300,000 shares issuable upon exercise of stock warrants
         currently exercisable at an exercise price of $3.65 per
         share, subject to certain adjustments.

Item 5.      Ownership of Five Percent or Less of a Class

             Not applicable

Item 6.      Ownership of More than Five Percent on Behalf of Another Person.

             Not applicable

 Item 7.     Identification and Classification of the Subsidiary Which Acquired
             the Security Being Reported on By the Parent Holding
             Company or Control Person.

             See Item 2(a) above.




Item 8.      Identification and Classification of Members of the Group

             Not applicable

Item 9.      Notice of Dissolution of Group

             Not applicable

Item 10.     Certification

             By signing below each of the undersigned  certifies that, to the
             best of its knowledge and belief, the securities referred to above
             were not acquired and are not held for the purpose of or with the
             effect of changing or  influencing  the control of the issuer of
             the  securities  and were not acquired and are not held in
             connection  with or as a  participant  in any transaction having
             that purpose or effect.



Exhibit A    Joint Filing Agreement




                                   SIGNATURES

After  reasonable  inquiry and to the best of its knowledge and belief,  each of
the undersigned  certifies that the information set forth in this statement with
respect to it is true, complete and correct.

Dated:  February 10, 2003

                                              LANDRICA DEVELOPMENT
                                              COMPANY

                                              By: /s/ Mark T. Thies
                                              Senior Vice President and CFO


                                              WYODAK RESOURCES
                                              DEVELOPMENT CORP.

                                              By: /s/ Mark T. Thies
                                              Senior Vice President and CFO


                                              BLACK HILLS ENERGY, INC.

                                              By: /s/ Mark T. Thies
                                              Senior Vice President and CFO


                                              BLACK HILLS CORPORATION

                                              By: /s/ Mark T. Thies
                                              Senior Vice President and CFO



                                                                EXHIBIT A

                             JOINT FILING AGREEMENT

     This Joint Filing Agreement (this  "Agreement") dated as of the 10th day of
February, 2003, is by and between the undersigned parties.

     In accordance with Rule 13d-1(k) under the Securities Exchange Act of 1934,
as amended,  the undersigned agree to the joint filing on behalf of each of them
of a statement on Schedule 13G  (including  amendments  thereto) with respect to
the common stock of KFx Inc.,  a Delaware  corporation,  and further  agree that
this  Agreement  be  included  as an  exhibit to such  joint  filing  (including
amendments thereto).

     IN WITNESS WHEREOF,  the undersigned have executed this Agreement as of the
date first above written.


                                              LANDRICA DEVELOPMENT COMPANY

                                              By: /s/ Mark T. Thies
                                              Senior Vice President and CFO


                                              WYODAK RESOURCES DEVELOPMENT CORP.

                                              By: /s/ Mark T. Thies
                                              Senior Vice President and CFO


                                              BLACK HILLS ENERGY, INC.

                                              By: /s/ Mark T. Thies
                                              Senior Vice President and CFO


                                              BLACK HILLS CORPORATION

                                              By: /s/ Mark T. Thies
                                              Senior Vice President and CFO