Lake Champlain Bridge Essex, New York & Addison, Vermont Installation of 32 shafts through water, soil and rock. Shafts were 72” diameter with lengths ranging from 30’ to 100’ with 66” diameter sockets with lengths ranging from 10’ to 25’. The drilled shafts were permanently cased through the water and soils and seated into the bedrock. The rock sockets were excavated using either a 66” down hole hammer drill or the Wirth PBA 933. Al

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