EXHIBIT 2.2

                                  AMENDMENT TO
                      PLAN AND AGREEMENT OF SHARE EXCHANGE


     THE PLAN AND AGREEMENT OF SHARE EXCHANGE  ("Agreement")  entered into as of
March 2, 2001,  by and  between  Admiralty  Corporation,  a Georgia  corporation
("Admiralty");  Ruby Mining Company, a Colorado  corporation  ("RMC");  and U.S.
Energy Corp.,  a Wyoming  corporation  ("USE"),  is amended as of April 6, 2001.
"Section"  refers to  sections  in the  Agreement;  capitalized  terms  have the
meanings therein ascribed.

         1.    The Closing Date under  Section 1.02 is changed to not later than
               April 19, 2001.

         2.    The  amount  of fees  payable  to USE for its  Exchange  Services
               Agreement  under Section 2.02 does not change,  but payment terms
               are changed to be $100,000 payable at Closing by wire transfer to
               USE's bank account, and $225,000 by Admiralty's  promissory note,
               8%  annual  interest,   secured  with   Admiralty's   assets  and
               intellectual  property.  The Parties acknowledge that the initial
               $25,000 non-  refundable  deposit in fact has not been paid as of
               the date of the Agreement or this Amendment.

         3.    Section 1.01(e) is changed to provide that at the Effective Time,
               1,684,027  shares  of RMC  Common  Stock  (out  of the  total  of
               3,664,027 shares of RMC Common Stock currently held by USE) shall
               be canceled,  and until the promissory  note is paid in full, USE
               will continue to hold 1,980,000 shares of RMC Common Stock.  When
               the promissory  note is paid in full,  another  600,000 shares of
               RMC Common  Stock shall be  canceled,  so that the full amount of
               2,364,027  shares  currently held by USE will have been canceled,
               as contemplated in the original Agreement.

         4.    During  the  period  from  the  Closing   until  payment  of  the
               promissory  note in full,  RMC shall  not sell more than  500,000
               shares of common stock, and one-half the proceeds of selling that
               stock shall be applied by RMC to pay the promissory note.

         5.    Section  9.07 is  amended to provide  that  delivery  of an audit
               report on  Admiralty's  financial  statements  therein  described
               shall not be a condition of closing. However, a copy of the audit
               report  shall be  delivered  to USE within 45 days of the Closing
               Date.

     Except as amended by the preceding, the Agreement remains in full force and
effect.










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     IN WITNESS  WHEREOF,  each of the Parties has caused this  Amendment  to be
executed on its behalf  attested by  officers  thereunto  as of the day and year
first above written.

                                      RMC:


                                      RUBY MINING COMPANY


                                      By    /s/   Harold F. Heron
                                         ---------------------------------------
                                      Name   Harold F. Herron
                                           -------------------------------------
                                      Title     Vice President
                                            ------------------------------------


                                      ADMIRALTY:


                                      ADMIRALTY CORPORATION


                                      By    /s/   Herbert C. Leeming
                                         ---------------------------------------
                                      Name   Herbert C. Leeming
                                           -------------------------------------
                                      Title     Chairman
                                            ------------------------------------


                                      USE:


                                       U.S. ENERGY CORPORATION


                                       By    /s/   John L. Larsen
                                          --------------------------------------
                                       Name   John L. Larsen
                                            ------------------------------------
                                       Title     CEO
                                             -----------------------------------





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