Dennis Boehm’s Wallace Hayward Baker Award: soil mixing lessons for ground engineers
Reviewed by Joe Ashwell

First reported on Geoengineer.org – News
30 Second Briefing
Dennis Boehm has received the Wallace Hayward Baker Award from the Deep Foundations Institute for more than three decades of work on deep foundations, starting with Hayward Baker (now Keller) in 1990. He is recognised as an expert in both wet and dry soil mixing, applying these methods on complex ground improvement and deep foundation projects across North America. For practitioners, his work reinforces the role of soil mixing in controlling settlement and improving bearing capacity where conventional piling or mass excavation is impractical.
Technical Brief
- Long-term specialisation in both wet and dry mixing supports optimisation of binder type, dosage and mixing energy.
- Lessons from such award-winning work often feed into contractor design manuals and standard operating procedures.
Our Take
Keller’s recent work on ground improvement for Encinal High School Stadium and the Hamilton bus facility in our coverage underscores that the expertise recognised by the Wallace Hayward Baker Award is still being actively applied on complex, performance-driven public infrastructure projects.
Within the 22 Geotechnical stories in our database, Keller appears repeatedly on projects involving redesign after unexpected ground conditions, suggesting the firm’s legacy from the Hayward Baker era is closely tied to adaptive, design–build geotechnical solutions rather than purely conventional execution.
A career at Hayward Baker/Keller starting in 1990 spans the period when ground improvement moved from niche to mainstream in North American infrastructure, which likely informs Keller’s current ability to satisfy stringent agency criteria such as those from the California Geological Survey on recent stadium work.
Prepared by collating external sources, AI-assisted tools, and Geomechanics.io’s proprietary mining database, then reviewed for technical accuracy & edited by our geotechnical team.
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