American Commercial Lines Inc. (ACL), one of the largest and most diversified inland marine transportation and service companies in the United States, announced today the appointment of Paul A. Tobin as Senior Vice President and Chief Operating Officer. An industry veteran, Mr. Tobin's most recent role was Senior Vice President Administration for AEP River Operations. He joined AEP in 2001 with the company's purchase of Memco Barge Line, where he served as Vice President Administration and Director Insurance during his four-year tenure.