EXHIBIT 16 April 30, 2002 Office of the Chief Accountant SECPS Letter File Securities and Exchange Commission Mail Stop 11-3 450 Fifth Street, N.W. Washington, D.C. 20549 Dear Sir/Madam: We have read the statements made in the second and third paragraphs of Item 4, to be included in the Form 8-K jointly filed by Cinergy Corp., The Cincinnati Gas & Electric Company, PSI Energy, Inc., and The Union Light, Hear and Power Company, dated April 30, 2002, to be filed with the Securities and Exchange Commission and are in agreement with the statements contained therein. Very truly yours, /s/ ARTHUR ANDERSEN LLP ARTHUR ANDERSEN LLP mkc cc: Mr. R. Foster Duncan, Executive Vice President and Chief Financial Officer