Deep Foundations Ductile Iron Piles Geotechnical Conditions Subsurface conditions at the site were typical for urban construction with up to 9 feet of loose to medium dense “urban” sand fill underlain by soft peat and organic clay/ silt to 28 feet. The fill and organics were underlain by very soft to medium stiff clay extending to a depth of 175 feet where bedrock was encountered. Project Challenges Install a foundation system capable of tra

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