Skip to content
DHS preserve building foundations

Government facilities

Haley & Aldrich geotechnical experts help preserve historic buildings and save costs

$1 million+

saved through our innovative foundation approach

160+ years

age of some buildings at site


  • The U.S. General Services Administration (GSA) needed foundation recommendations as part of a multiyear project to transform St. Elizabeths Hospital, a National Historic Landmark that dates to the Civil War.
  • Adding high-tech features to old buildings while maintaining structural integrity presented a major challenge. Also, the hospital sits on a marine clay deposit — notorious for causing landslides.
  • A Haley & Aldrich team advised on a sequence for building construction that would protect historical structures and limit work redundancies. We also suggested an innovative design approach for new structures that would share a slope with a historic powerhouse: to build into the 60-foot upslope underlain by marine clay. This approach was most likely to prevent landslides and would save millions.
  • Because of our innovative approach, the GSA included Haley & Aldrich as the official geotechnical engineers for future phases of the hospital project.

For more information, contact:

headshot of male, David Schoenwolf
David Schoenwolf

Principal Consultant, Geotechnical Engineering