Pilot Tube Microtunneling

Pilot Tube Microtunneling

Pilot Tube Microtunneling (PTMT) is a trenchless method to install new service lines and gravity flow sewer tunnels with pinpoint accuracy.  This method requires a multi-step sequence of accurately installing a pilot tube, followed by upsizing stages to the final product pipe diameter.

Step One:

Step Two:

Step Three:


Case Studies

GBM Case Study – Pilot Tube Microtunneling

The City of Minneapolis’s sewer system was originally constructed in the 1890s and in need of capacity upgrades and new extensions as part of the Nicollet Mall re-imaging effort in the heart of downtown. The highly urbanized region had many subsurface utilities and above ground buildings and structures. Read more

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