AGREEMENT

    This Agreement is entered into this __ day of March, 1998, between 
PENNACO ENERGY. INC., whose address is 3651 Lydell Road, Suite A, Las Vegas, 
Nevada 89103 (hereinafter referred to as "Pennaco"), and HIGH PLAINS 
ASSOCIATES, INC., whose address is 1557 Ogden Street, Suite 300, Denver, 
Colorado 80218 (hereinafter referred to as "High Plains").

                                  RECITALS

1.  Pennaco and High Plains entered into a Mineral Lease Purchase Agreement 
    dated February 23, 1998 (hereinafter referred to as "Mineral Lease Purchase 
    Agreement").

2.  Louis A. Oswald, III, and Crystal H. Oswald (collectively, the "Oswalds") 
    and High Plains entered into an Agreement with Randall Taylor, d/b/a Taylor 
    Oil Properties dated January 23, 1998 (hereinafter referred to a the 
    "Taylor Agreement."). The Taylor Agreement is attached as Exhibit "A" to 
    Attachment I hereto.

3.  Under the provisions of the Taylor Agreement, High Plains has an option 
    to acquire oil and gas leases in the North Powder Prospect, Sheridan 
    County, Wyoming, and Powder River County, Montana, pursuant to the terms 
    and provisions of the Taylor Agreement.

4.  Pursuant to the terms of the Mineral Lease Purchase Agreement, Pennaco 
    desires to take an assignment of High Plains' option rights under the 
    Taylor Agreement, exercise the option, close the transaction, and receive 
    an assignment of the oil and gas leases which are subject to Taylor 
    Agreement.

    Now, therefore, for an in consideration of this agreement, and the covenants
and provisions herein contained, Pennaco and High Plains agree as follows:

    1. ASSIGNMENT OF OPTION. Oswalds and High Plains shall execute and 
deliver to Pennaco the Assignment of Option and Exercise of Option attached 
hereto as Attachment I. Pennaco shall execute that portion of this document 
which exercises the option to purchase the leases subject to the Taylor 
Agreement.

    2. EXERCISE OF OPTION. On or before the option deadline 10:00 a.m. on 
March 7, 1998, High Plains shall provide Taylor with a copy of the fully 
executed copy of Attachment I. Pennaco agrees and understands that upon 
delivering such document to Taylor, that Pennaco shall be contractually 
obligated to close the purchase transaction contemplated by the Taylor 
Agreement on the closing date of May 20, 1998, but subject to the terms and 
provisions of the Taylor Agreement.

    3. ASSUMPTION OF LIABILITY; INDEMNITY. Pennaco herewith assumes any and 
all of the liabilities of High Plains and/or the Oswalds, and their 
respective successors and assigns, under the Taylor Agreement. Pennaco 
herewith agrees to indemnify and hold High Plains and the Oswalds harmless 
from any costs, claims or liabilities arising under or related to the Taylor 
Agreement,



including any and all claims arising out of any alleged, asserted, or proven 
breaches thereof by Pennaco, specifically including by way of example any 
claims or damages relating to failure to close or failure to pay the full 
consideration required for the assets. The foregoing assumption and indemnity 
shall extend to court costs and reasonable attorneys' fees, and shall be 
liberally construed so that the entirety of any legal risk associated with or 
arising out of the buyers nonperformance under the Taylor Agreement is borne 
solely by Pennaco.

    4. ASSIGNMENTS. As contemplated by Attachment I, High Plains shall 
continue to assist in closing the transaction with Taylor on behalf of 
Pennaco, by providing land and/or title review due diligence services to 
Pennaco at its normal billing rate. To the extent that Taylor allows, High 
Plains shall assist in the preparation of assignment documents for closing 
with Taylor. Assignments shall be made into the name of High Plains. Closing 
funds shall be provided by Pennaco and paid directly to Taylor. The closing 
settlement statement shall be approved by Pennaco. Upon taking possession of 
the assignments at closing with Taylor and payment to High Plains of it out 
of-pocket expenses and third party or contract fees and expenses at its 
standard rates, High Plains shall assign, using appropriate state or federal 
assignment forms, all of its right, title, and interest in and to the leases 
acquired from Taylor pursuant to the Taylor Agreement, reserving in said 
assignment, unto High Plains an overriding royalty interest as set forth in 
Paragraph V.I. of the Mineral Lease Purchase Agreement.

    5. EFFECT OF THIS AGREEMENT. The foregoing represents the entire 
agreement of the parties as to Pennaco's participation in the acquisition of 
the leases subject to the Taylor Agreement through High Plains. Except as 
specifically modified herein, the Mineral Lease and Purchase Agreement shall 
apply to the Taylor leases and the Taylor Agreement; provided, however the 
provisions of Paragraphs VII.3 and VII.5 to the Mineral Lease Purchase 
Agreement shall not apply to the transaction contemplated hereby.  The sole 
consideration to be paid to High Plains for the assignment of its rights 
under the Taylor Agreement shall be overriding royalty interest which is 
reserved to High Plains under paragraph 4, above, and the retention of High 
Plains to provide land, title and due diligence services in connection with 
this transaction.

DATED the date first above written.


                                    HIGH PLAINS ASSOCIATES, INC.
                                   
                                    By: /s/ Louis A. Oswald, III
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                                    LOUIS A. OSWALD, III, as President
                                   
                                    PENNACO ENERGY, INC.
                                   
                                    By: /s/ [ILLEGIBLE]
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                                    Its: Sr. Vice President
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