SECURITIES AND EXCHANGE COMMISSION
                      WASHINGTON, D.C.  20549

                           SCHEDULE 14D-1
                          AMENDMENT NO. 11
   TENDER OFFER STATEMENT PURSUANT TO SECTION 14(D)(1) OF THE SECURITIES
                         EXCHANGE ACT OF 1934

                     SANTA FE PACIFIC CORPORATION
                       (NAME OF SUBJECT COMPANY)

                      UNION PACIFIC CORPORATION
                      UP ACQUISITION CORPORATION
                            (BIDDERS)

              COMMON STOCK, PAR VALUE $1.00 PER SHARE

                   (TITLE OF CLASS OF SECURITIES)

                            802183 1 03
                (CUSIP NUMBER OF CLASS OF SECURITIES)

                        RICHARD J. RESSLER
                    ASSISTANT GENERAL COUNSEL
                    UNION PACIFIC CORPORATION
                     EIGHTH AND EATON AVENUES
                   BETHLEHEM, PENNSYLVANIA  18018
                            (610) 861-3200
   (NAME, ADDRESS AND TELEPHONE NUMBER OF PERSON AUTHORIZED TO
     RECEIVE NOTICES AND COMMUNICATIONS ON BEHALF OF BIDDERS)

                          with a copy to:

                       PAUL T. SCHNELL, ESQ.
                SKADDEN, ARPS, SLATE, MEAGHER & FLOM
                          919 THIRD AVENUE
                      NEW YORK, NEW YORK  10022
                      TELEPHONE:  (212) 735-3000
                                                                         
          Union Pacific Corporation, a Utah corporation ("Parent"),
     and UP Acquisition Corporation, a wholly owned subsidiary of
     Parent (the "Purchaser"), hereby amend and supplement their
     Statement on Schedule 14D-1 ("Schedule 14D-1"), filed with the
     Securities and Exchange Commission (the "Commission") on November
     9, 1994, as amended by Amendment No. 1, dated November 10, 1994,
     Amendment No. 2, dated November 14, 1994,  Amendment No. 3, dated
     November 18, 1994, Amendment No. 4, dated November 22, 1994,
     Amendment No. 5, dated November 23, 1994,  Amendment No. 6, dated
     November 29, 1994, Amendment No. 7, dated December 2, 1994,
     Amendment No. 8, dated December 8, 1994, Amendment No. 9, dated
     December 15, 1994, and Amendment No. 10, dated December 16, 1994,
     with respect to the Purchaser's offer to purchase 115,903,127
     shares of Common Stock, par value $1.00 per share (the "Shares"),
     of Santa Fe Pacific Corporation, a Delaware corporation (the
     "Company").

          Unless otherwise indicated herein, each capitalized term
     used but not defined herein shall have the meaning assigned to
     such term in Schedule 14D-1 or in the Offer to Purchase referred
     to therein.

     ITEM 3.  PAST CONTACTS, TRANSACTIONS OR NEGOTIATIONS WITH 
              THE SUBJECT COMPANY.

          The information set forth in Item 3(b) of Schedule 14D-1 is
     hereby amended and supplemented by the following information:

          On December 18, 1994, Drew Lewis, Chairman and Chief
     Executive Officer of Parent, sent a letter, dated December 18,
     1994, to the Company; a copy of the letter is attached hereto as
     Exhibit (g)(10) and incorporated herein by reference.

     ITEM 11.  MATERIAL TO BE FILED AS EXHIBITS.

          (g)(10)   Letter, dated December 18, 1994, by Union Pacific
                    Corporation to Santa Fe Pacific Corporation.



                                 SIGNATURE

          After due inquiry and to the best of my knowledge and
     belief, I certify that the information set forth in this
     statement is true, complete and correct.

     Dated:  December 19, 1994

                                     UNION PACIFIC CORPORATION

                                     By: /s/ Gary M. Stuart           
                                        __________________________
                                        Title: Vice President and
                                                 Treasurer
          


                                 SIGNATURE

          After due inquiry and to the best of my knowledge and
     belief, I certify that the information set forth in this
     statement is true, complete and correct.

     Dated:  December 19, 1994

                                     UP ACQUISITION CORPORATION

                                     By: /s/ Gary M. Stuart           
                                        ____________________________
                                        Title: Vice President and
                                                 Treasurer
          


                               EXHIBIT INDEX

     Exhibit No.         Description

          (g)(10)   Letter, dated December 18, 1994, by Union Pacific
                    Corporation to Santa Fe Pacific Corporation.





                                                    EXHIBIT (G)(10)

          [Union Pacific Letterhead]

                                        December 18, 1994

          Mr. Robert D. Krebs
          Chairman, President and CEO
          Santa Fe Pacific Corporation
          1700 East Golf Road
          Schaumburg, IL  60173

          Dear Rob:

                    I understand that you sent a letter to my
          office Saturday.

                    We continue to be troubled by Santa Fe's
          refusal to address in any way our concerns about your
          process for considering acquisition proposals.

                    As we have repeatedly stated, and said to your
          advisors yesterday, we want to be in a position to make
          an improved proposal.  We see no reason why you cannot
          address our concerns, and hope you will give
          consideration to the specific suggestions made by our
          advisors.

                                        Sincerely,

                                        /s/ Drew Lewis