EXHIBIT 3.29

                           CERTIFICATE OF FORMATION

                                      OF

               Commercial Aggregates Transportation & Sales, LLC

     The undersigned, desiring to form a limited liability company pursuant to
     the Delaware Limited Liability Company Act, does hereby certify as follows:

          1. The name of the limited liability company is:

               Commercial Aggregates Transportation & Sales, LLC

          2. The address of its registered office in the State of Delaware is 9
          East Loockerman Street, in the City of Dover, County of Kent, State of
          Delaware 19901.  The name of its registered agent at such address is
          National Registered Agents, Inc.

     IN WITNESS WHEREOF, the undersigned has executed this Certificate of
     Formation of Commercial Aggregates Transportation & Sales, LLC this 27/th/
     day of September, 1999.


                                    /s/ Melissa Freidenreich
                                    --------------------------------------
                                    Melissa Freidenreich