EXHIBIT 2.1 

                                      
                          SUPPLEMENT TO AGREEMENT 

     THIS SUPPLEMENT TO AGREEMENT is made and entered into this 5th day of 
August, 1996 by and among Monument Resources, Inc. ("Monument"), a Colorado 
corporation, Crescent Oil & Gas Corporation ("Crescent"), a Delaware 
corporation, and Powerhouse Resources, Inc. ("Powerhouse"), a Colorado 
corporation.

     WHEREAS, an Agreement and Plan of Reorganization dated February 23, 
1996, and its Addendum dated March 22, 1996, has heretofore been executed by 
the parties; and 

     WHEREAS, the parties wish to make certain fundamental changes in the 
terms and conditions set forth therein;

     NOW THEREFORE, for and in consideration of the mutual covenants and 
agreements herein set forth and the mutual benefits of the parties to be 
derived herefrom, it is hereby agreed as follows:

     1.  Article 3 entitled "Plan of Reorganization" is hereby deleted, with 
the sole exception of the right of first refusal and absolute right to 
purchase referred to therein, in Section 4 of the March 22, 1996, addendum 
and in lieu thereof the parties agree that Monument will acquire by purchase 
the three following assets of Crescent known as: (a) the Galvin Ranch 
property, Webb County, Texas; (b) the Kansas (Levenworth) gas system 
pipeline, shells, buildings and equipment; and (c) the East Voss Oil property 
in Knox County, Texas. Monument will not acquire the Suimork Oil Depot in 
China.

     2.  Monument will pay to Powerhouse in consideration for such properties 
set forth immediately above the amount of 3,000,000 shares of its common 
stock, which will be issued upon execution of the documents necessary to 
assign the properties set forth above free and clear of liens and 
encumbrances except those of record, and the return of the 1,000 shares of 
Monument's convertible preferred stock.

     3.  In addition, the 1,000,000 shares of Monument now held in escrow 
payable under certain circumstances to Powerhouse will be canceled and 
returned to Monument in consideration for the following: (a) $25,000 cash to 
be paid to Powerhouse upon execution hereof; (b) $100,000 shall be paid by 
Monument to Powerhouse and escrowed and will be disbursed to Powerhouse when 
Powerhouse produces a general release and waiver from Alan Arnold with 
respect to his employment agreement, office rental expenses and other items 
of a similar nature. The general waiver will also include the requirement 
that all books, records and property files of Crescent be returned to the 
Denver office as part of the overall settlement and general release and 
waiver; (c) an additional $100,000 shall be paid by Monument to Powerhouse 
and escrowed and disbursed against the expenses set forth on Exhibit 1 of the 
Escrow Agreement. These expenses are accounts payable of Crescent which been 
mutually agreed to be paid out of the $100,000 payment set forth in this 
subparagraph; and (d) any funds in excess of the amounts required to be paid 
for payment or settlement of those matters set forth in this paragraph shall 
be the sole property of Powerhouse and disbursed to it upon settlement or 
payment of the required amounts in each sub-paragraph, but in no event later 
than October 1, 1996.

     4.  Powerhouse shall have a one-time right to demand registration of the 
Monument shares described in paragraph 2 subject to the following 
conditions:

     i)  such demand shall be effective only at such times as Monument's 
financial statements are sufficiently current for inclusion in registration 
statements which may be filed on Forms S-1, S-3 or SB-2, it being the intent 




of the parties that any incremental accounting costs incurred either be minimal 
or paid by Powerhouse;

     ii)  such demand shall not be made nor be effective if at such time 
Monument has underway any material bonafide capital raising, merger or 
similar transaction which would be adversely affected by such demand;

     iii)  costs including legal fees, printing and miscellaneous expenses 
(estimated not to exceed $50,000) shall be shared equally regardless of the 
actual amount, as between Powerhouse and Monument; and

     iv)  such demand registration right shall expire on April 1, 1999.

     5.  Monument agrees that it will use its best efforts and expertise to 
assist Powerhouse in the management of its remaining oil and gas properties 
which will continue to be owned by Crescent.

     6.  The Board of Directors of Powerhouse will agree that it will 
instruct its proper officers to vote any and all shares of Monument held by 
it at the direction of the management of Monument for a period of two years 
from the date hereof, at any properly convened meeting for the purpose of 
electing a slate of directors nominated by Monument management.

     7.  Powerhouse acknowledges and Monument agrees that Powerhouse shall 
have the right to appoint one member to Monument's Board of Directors until 
such time as Powerhouse owns fewer than 500,000 Monument shares.

     8.  The effective date of the transaction is deemed to be April 1, 1996.

     9.  To the extent any provisions of the Agreement and Plan of 
Reorganization or its Addendum dated March 22, 1996, are inconsistent with 
the terms of this Supplement, the provisions of this Supplement will apply.

     All other provisions of the foregoing Agreement and Plan of 
Reorganization shall continue to be effective except to the extent modified 
herein which shall control in such instance.

     IN WITNESS WHEREOF, the parties hereto have caused this Supplement to 
Agreement to be executed by their respective officers, hereunto duly 
authorized.

                                       ("Monument")                           
                                       MONUMENT RESOURCES, INC.               

                                       By  /s/  Anton G. Foust                
                                         ------------------------------------ 
                                         Anton G. Foust, President 


                                       ("Crescent")
                                       CRESCENT OIL & GAS CORPORATION         

                                       By  /s/  Dennis C. Dowd                
                                         ------------------------------------ 
                                         Dennis C. Dowd, Vice President and 
                                          Director 


                                       ("Powerhouse")
                                       POWERHOUSE RESOURCES, INC.

                                       By  /s/ Dennis C. Dowd                
                                         ------------------------------------ 
                                         Dennis C. Dowd, President 


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