Mole Constructors completed the excavation of 6,077 linear feet of tunnel using a Tunnel Boring Machine (TBM). They jacked 84-inch Reinforced Concrete Pipe (RCP) for a sanitary sewer and slip-lined it with 72-inch Hobas pipe. The tunnel excavation was performed with a 103-inch MST Microtunnel Boring Machine, with runs reaching a maximum length of 850 feet. Twelve shafts, ranging in depth from 40 to 60 feet, were supported with steel sheeting and dewatered. Additionally, eleven manholes were constructed, along with one 30-foot diameter chamber.
Project Details
- Owner: Metropolitan Sewer District of Greater Cincinnati
- Location: Cincinnati, Ohio, United States
- Performed as: Mole Constructors, Inc.
- Project value: $39,065,669.00
- Completion Date: December 2010