APPOINTMENT OF ATTORNEY-IN-FACT

         I hereby authorize the filing with the Securities and Exchange
Commission of any and all reports on Forms 3, 4 and 5 ("Reports"), or any
substitute form hereafter adopted by the Securities and Exchange Commission,
as may from time to time be required under Section 16(a) of the Securities
Exchange Act of 1934, as amended. I hereby appoint Messrs. James Abbott,
Doyle L. Arnold and Thomas E. Laursen, and each of them, as my
attorneys-in-fact with power to any of them to sign any and all Reports and
any and all amendments to Reports or documents required to complete the
filing of Reports or amendmentsthereto with the Securities and Exchange
Commission on my behalf.


                         Dated the 17th of March, 2010.



                                                    /s/Alexander J. Hume
                                                    --------------------


STATE OF UTAH       )
                    )   ss.
COUNTY OF SALT LAKE )


                                 ACKNOWLEDGMENT

     On this 17th of March, 2010, personally appeared before me Alexander
J. Hume, known to me to be the  person  whose  name is subscribed to the
above instrument  and who  acknowledged  that (s)he executed the same for
the purposes therein contained.

         IN WITNESS WHEREOF, I have hereunto set my hand and official seal.

                                                    /s/ Jennifer R. Jolley
                                                    ----------------------
                                                             NOTARY PUBLIC


My Commission Expires:                                    Residing At:
September 2, 2013	                               Salt Lake City, Utah
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