Exhibit 24.1


                                POWER OF ATTORNEY


         KNOW ALL PERSONS BY THESE PRESENTS, that each person whose signature
appears below hereby severally constitutes and appoints Kirk A. Benson and
Harlan M. Hatfield and each of them individually, with full power of
substitution and resubstitution, his or her true and lawful attorney-in-fact and
agent, with full powers to each of them to sign for us, in our names and in the
capacities indicated below, the Registration Statement on Form S-3 filed with
the Securities and Exchange Commission, and any and all amendments to said
Registration Statement (including post-effective amendments), and any
registration statement filed pursuant to Rule 462(b) under the Securities Act of
1933, as amended, in connection with the registration under the Securities Act
of 1933, as amended, of securities of the Registrant, and to file or cause to be
filed the same, with all exhibits thereto and other documents in connection
therewith, with the Securities and Exchange Commission, granting unto said
attorneys, and each of them, full power and authority to do and perform each and
every act and thing requisite and necessary to be done in connection therewith,
as fully to all intents and purposed as each of them might or could do in
person, and hereby ratifying and confirming all that said attorneys, and each of
them, or their substitutes, shall do or cause to be done by virtue of this Power
of Attorney. This Power of Attorney may be executed in counterparts and all
capacities to sign any and all amendments.


         Dated: July 17, 2003                   /s/ William S. Dickinson
                                                -------------------------------
                                                 William S. Dickinson


         Dated: July 17, 2003                    /s/ Malyn K. Malquist
                                                -------------------------------
                                                 Malyn K. Malquist


         Dated: July 17, 2003                    /s/ R Steve Creamer
                                                -------------------------------
                                                 R Steve Creamer