The Metropolitan Sewer District of Greater Cincin-nati needed to repair a rusty, weak and deformed section of 78-inch corrugated metal combined sanitary-storm sewer pipe running under a pharmaceutical company drug research and manufacturing site.The size of the pipe and its location under an active industrial plant presented unique challenges for MSD senior engineers as they reviewed rehabilitation options.The addition of a second story to the drug company building required a structural solution. Manhole access was next to an active multiple-entry loading dock on one side and next to railroad tracks on the other. In addition, the pipe was laid on
