September/October 2017 Issue of Deep Foundations Magazine

Micropiles supported excavation beneath the historic Andrew Mellon Building in Washington, D.C.

The latest issue of Deep Foundations Magazine is available online from the Deep Foundations Institute (DFI).  The September/October 2017 issue cover story is about the 2017 OPA Winning Project – The Expansion and Preservation of the Andrew Mellon Building in Washington D.C.  This project involved adding a basement beneath the existing foundations of the National Historic Landmark.  Berkel & Company Contractors designed micropiles to serve as the shoring system and the permanent deep foundation elements.

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