Exhibit 24 POWER OF ATTORNEY KNOW ALL PERSONS BY THESE PRESENTS, that each person whose signature appears below constitutes and appoints K. Bruce Lauritsen and R.J. Klosterman, and each of them, his/her true and lawful attorneys-in-fact and agents, with full power of substitution and resubstitution, for him/her and in his/her name, place and stead, in any and all capacities, to sign any and all amendments (including post-effective amendments) to this Registration Statement and to file the same, with all exhibits thereto, and other documents in connection therewith, with the Securities and Exchange Commission, granting unto said attorneys-in-fact and agents, and each of them, full power and authority to do and perform each and every act and thing requisite and necessary to be done, as fully to all intents and purposes as he/she might or could do in person, hereby ratifying and conforming all that said attorneys-in-fact and agents or any of them, or their or his/her substitute or substitutes, may all fully do or cause to be done by virtue hereof. SIGNATURE TITLE DATE /s/ J.B. CRAHAN Chairman, Board of Directors December 5, 1995 J.B. CRAHAN and Director /s/ R.J. KLOSTERMAN Vice President, Finance December 5, 1995 R.J. KLOSTERMAN (Principal Financial Officer) /s/ FRANK H. BERTSCH Director December 5, 1995 FRANK H. BERTSCH /s/ ART D. RICHARDSON Director December 5, 1995 ART D. RICHARDSON /s/ K. BRUCE LAURITSEN Director December 5, 1995 K. BRUCE LAURITSEN /s/ EDWARD J. MONAGHAN Director December 5, 1995 EDWARD J. MONAGHAN /s/ JAMES G. PETERSON Director December 5, 1995 JAMES G. PETERSON /s/ THOMAS E. HOLLORAN Director December 5, 1995 THOMAS E. HOLLORAN /s/ JAMES R. RICHARDSON Director December 5, 1995 JAMES R. RICHARDSON /s/ L. BRUCE BOYLEN Director December 5, 1995 L. BRUCE BOYLEN /s/ JOHN R. EASTER Director December 5, 1995 JOHN R. EASTER