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1990 Folsom - Tenderloin Neighborhood Development Corp.


Key Features 


  • Eight-story 100% affordable-housing complex in San Francisco's Mission District, co-developed and owned by Tenderloin Neighborhood Development Corp. and Mission Economic Development Agency 

  • 143 residential units, along with arts-oriented PDR, childcare, urban farming, outdoor recreational spaces, as well as residential services 


Geotechnical Challenges



Innovative Solutions


  • Variable near-surface soil conditions

  • Shallow groundwater

  • Design-build ground improvement elements (Drilled Displacement Columns)

  • Collaboration with Design Team and specialty ground improvement contractor to select an appropriate ground improvement solution accommodating shallow foundations

  • Robust and efficient production and post-production testing and assessment of ground improvements to confirm design performance was achieved 

  • Proficient coordination with general contractor and foundation contractor and ground improvement specialty contractor to provide client with expedient and prompt Quality Assurance during construction

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