EXHIBIT 3.1C

                            CERTIFICATE OF AMENDMENT

                                     TO THE

                            CERTIFICATE OF FORMATION

                                       OF

                          PENINSULA GAMING COMPANY, LLC



         This  Certificate  of Amendment is being duly executed and filed by the
undersigned,  as the  authorized  person for Peninsula  Gaming  Company,  LLC, a
Delaware  limited  liability  company  (the  "Company"),  in order to amend  the
Certificate  of  Formation  of the Company,  dated  February  27,  2004,  all as
provided by Section 18-202 of the Delaware Limited Liability Company Act:

          1.   The name of the Company is Peninsula Gaming Company, LLC.

          2.   The Certificate of Formation of the Company is hereby amended as
               following:

               The name of the limited liability company formed hereby is
          "Diamond Jo, LLC."


         IN WITNESS  WHEREOF,  the undersigned has executed this  certificate on
behalf of the Company as of March 10, 2004.


                                            /s/ Sharon Purcell
                                            ------------------------
                                            Sharon Purcell
                                            Authorized Person