A steel cased pipe is lowered into a shaft for installation

Lockbourne Intermodal Subtrunk Microtunneling

Michels Trenchless, Inc. used microtunneling to install 10,218 feet of 82-inch fiberglass-reinforced pipe in nine drives as a sanitary sewer tunnel. The tunnel alignment crossed a wide mixture of geologies, including cobbles and large boulders.

Michels constructed eight liner plate and ring beam temporary shafts for the tunneling operations, 11 manholes, two cast-in-place structures, and 21 manholes for open cut. Extensive dewatering plans with multiple wells were required at each shaft.