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