Malcolm Drilling's clamshell bucket taking a scoop out while excavating the access pit
Project Related

Update on Access Pit for Repairing Bertha TBM

There hasn’t been much to report recently for the Alaskan Way Viaduct Tunnel Project in Seattle. As you probably know, Bertha has not advanced since about December of 2013 after drilling through an abandoned steel […]


Malcolm drilling crews setting up to drill secant pile shafts for TBM launch pit
Project Related

Digging deep to drill Highway 99 tunnel

Construction has started on the tunnel boring machine launch pit for the WSDOT SR 99 Tunnel Project (Viaduct Replacement). The 420 foot long pit is being constructed using secant pile retaining walls, with 2 rows […]