EX-16.1 3 h97336exv16w1.txt LETTER OF ARTHUR ANDERSEN LLP EXHIBIT 16.1 [ANDERSON LOGO] May 23, 2002 Office of the Chief Accountant Securities and Exchange Commission 450 Fifth Street, N.W. Washington, DC 20549 Re: Powell Industries, Inc. Ladies and Gentlemen: We have read Item 4 in the Form 8-K dated May 29, 2002 of Powell Industries, Inc., to be filed with the Securities and Exchange Commission and are in agreement with the statements contained therein as they relate to Arthur Andersen LLP. Very truly yours, /s/ Arthur Andersen LLP Copy to: Don R. Madison Vice President Chief Financial Officer Powell Industries, Inc. P.O. Box 12818 Houston, Texas 77217