EXHIBIT 99.7 March 28, 2002 Robert K. Herdman Chief Accountant Securities and Exchange Commission 450 Fifth Street, N. W. Washington, D.C. 20549 Dear Mr. Herdman: As it relates to the audit of the financial statements of the Ohio operations as of and for the year ended December 31, 2001 included in this Form 10-K, Arthur Andersen LLP (Arthur Andersen) has represented to us that this audit was subject to Arthur Andersen's quality control system for the U.S. accounting and auditing practice to provide reasonable assurance that the engagement was conducted in compliance with professional standards, that there was appropriate continuity of Arthur Andersen personnel working on the audit, availability of national office consultation. Availability of personnel at foreign affiliates of Arthur Andersen is not relevant to this audit. Sincerely, /S/ Niel C. Ellerbrook - ----------------------- Niel C. Ellerbrook Chairman and Chief Executive Officer Vectren Energy Delivery of Ohio, Inc. and Indiana Gas Company, Inc.