POWER OF ATTORNEY


I, James A. Frey II, do hereby constitute and appoint Joseph S. Konowiecki,
Michael E. Jansen, Ellen K. Erickson and Lisa C. Poland, or each one of them
separately, as my true and lawful attorneys and agents, to do any and all lawful
acts and things in my name and on my behalf, and to execute any and all
instruments, forms or filings in my name and on my behalf, which said
attorneys and agents, or each one of them separately, may deem necessary or
advisable in order for me to comply with the disclosure requirements of
Section 16(a) of the Securities Exchange Act of 1934, and any related rules,
regulations, and requirements of the Securities and Exchange Commission; and
do hereby ratify and confirm all that said attorneys and agents, or each one
of them separately, shall do or cause to be done by virtue thereof.



Date: February 15, 2005

James A. Frey II