When the Port of Los Angeles required added berthing space, they undertook the creation of a new facility called Pier 400.

The Challenge
The location, having been created entirely from dredged material, had a liquefaction risk.

The Solution
Traylor Pacific, the General Contractor for the Port subcontracted with Condon-Johnson & Associates (CJA) to install over 3,500 stone columns to depths of 42’ for phase II of the project. Total value of this contract was over $ 5.75 million.

CJA, in joint venture with Soletanche, installed dry bottom feed stone columns utilizing over 120,000 tons of course aggregate The dry bottom feed method was utilized to allay concerns about disrupting the nesting habitat of the Lesser Tern, a bird which frequents the area.

The Result
The project was performed on a double shift basis and was completed in five months, under budget and ahead of schedule..

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Stone Columns