EXHIBIT 24 POWERS OF ATTORNEY Each person whose signature appears below hereby authorizes Richard W. Parod and Bruce C. Karsk, and each of them severally, as attorney-in-fact, to sign on his behalf, individually and in each capacity stated below, (a) the Registration Statement on Form S-8 for the Lindsay Manufacturing Co. 2001 Long-Term Incentive Plan and any pre or post-effective amendments thereto, and (b) the Registration Statement on Form S-3 relating to the registration of up to 350,000 shares of common stock, par value $1.00 per share, of Lindsay Manufacturing Co. for sale by Richard W. Parod and any pre or post-effective amendments thereto, and to file the same, with all exhibits thereto, and all documents in connection therewith, with the Securities and Exchange Commission. SIGNATURE TITLE DATE --------- ----- ---- /s/ Richard W. Parod Director, President and Chief May 3, 2002 - --------------------------- Executive Officer Richard W. Parod /s/ Bruce C. Karsk Executive Vice President, Chief May 3, 2002 - --------------------------- Financial Officer, Treasurer and Bruce C. Karsk Secretary /s/ Howard G. Buffett Chairman May 3, 2002 - --------------------------- Howard G. Buffett /s/ Michael Christodolou Director May 3, 2002 - --------------------------- Michael Christodolou /s/ Larry H. Cunningham Director May 3, 2002 - --------------------------- Larry H. Cunningham /s/ William F. Welsh Director May 3, 2002 - --------------------------- William F. Welsh /s/ J. David McIntosh Director May 3, 2002 - --------------------------- J. David McIntosh