Trenchless

Microtunneling

Building tunnels in challenging ground conditions

Microtunneling is a versatile way to build tunnels upwards of 10 feet in diameter in all soil conditions in areas with high ground water conditions. We have been using this method since the early 1970s and have mastered its use under high water pressure and in unfavorable ground conditions.

Microtunneling combines a remotely controlled, guided microtunnel boring machine - or MTBM, a sturdy casing pipe, and pipe jacking provides continuous support. This technique is effective for construction under roadways, waterways and other challenging situations. When conditions require it, we are able to adhere to engineered curves as well as typical line-and-grade designs.

Mircrotunneling is a closed-face system, meaning it can be launched from a shaft on land to a predetermined underwater endpoint. After a bulkhead is attached, the machine is disconnected and lifted to the surface. We have completed dozens of these wet retrievals.

Underwater Retrieval

Michels carved a unique niche in the tunneling industry by addressing the need to retrieve MTBMs underwater. This specialized tunnel construction method starts in a shaft onshore and proceeds to an endpoint under a waterway. The newly constructed tunnel is sealed at the that precise location, and the MTBM is detached and lifted onto a barge. Michels has successfully executed more than two dozen underwater retrievals, more than any other contractor in North America.

The vast experience and design-build capabilities make us your partner of choice for underwater projects.



Contact us to learn more.

Projects

Microtunneling

Schweitzer Pump House Wet Well & Intake Piping

Minnesota

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Schweitzer Pump House Wet Well & Intake Piping

Microtunneling

Delco Raw Water Pump Station

Ohio

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Delco Raw Water Pump Station

Microtunneling

Columbia Water Supply

Washington

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Columbia Water Supply

Quality means doing it right
when no one is looking.

Henry Ford

We do that.

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