95-02: Partial Collapse and Rebuild of the Conesville Unit 4 Mechanical Draft

On January 31, 1993, the north side of the No. 4A mechanical draft-cooling tower serving Columbus Southern Power's Conesville Unit 4 collapsed; forcing the 800 MW coal-fired generating unit out of service. The cause of catastrophic structural failure, tower reconstruction program, and considerations for preventing similar failures in the future will be reviewed.