With over two decades spent tunneling in the challenging geotechnical conditions of the Pacific Northwest, the J.W. Fowler team has developed a unique capability to self-perform a wide variety of tunneling, trenchless, and shaft-sinking methods including slurry microtunneling with deep water retrieval, earth pressure balance tunneling, SEM tunneling, hard rock tunneling, open face conventional tunneling with rib and lagging or liner plate, slip lining, cast-in-place concrete liner, frozen ground excavations, segmentally lined caissons, pipe ramming, and auger boring.
