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Cut and Cover

The new Sutter Health Van Ness Geary Campus includes a pedestrian tunnel underneath Van Ness Avenue in San Francisco. Van Ness Avenue is designated US 101 - the main north south route through San Francisco over the Golden Gate Bridge.…

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Oil Well Abandonment

The Gerald Desmond Bridge in Long Beach, California spans the Wilmington Oil Field – one of the largest oil fields in the continental United States, with more than 6,000 oil wells. In order to construct the new bridge, all active…

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Malcolm’s underpinning systems allow excavation adjacent to and directly below sensitive structures and facilities. Low vibration and sequenced construction techniques are employed to provide vertical load capacity while maintaining ground support. After new support systems are installed, load is transferred…

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