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Large Diameter Access Shafts

Anderson Drilling has been installing large diameter access shafts for over 15 years. These shafts that range in finished diameter from 96" and greater, up to 175 feet in depth, have proven to be a safe and cost effective solution to a variety of subsurface construction challenges including micro-tunneling operations, pump station construction, manhole installation and even missile silo construction.

Our unique equipment and tooling capabilities combined with our drilling methods have positioned Anderson Drilling as the leader in large diameter auger excavations. We have successfully excavated these large shafts under both dry and wet conditions.







Geysers Recharge Project  






Howe Avenue 54" Water Trasmission Main  






Napa Sewer Force Main  






Northeast Outerloop Access Shaft  






Tacoma 2nd Supply Pipeline  






Tacoma Clearwater Supply Pipeline  






US95 Rancho Sewer - Phase I  
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