A geotechnical report summarizes subsurface investigation findings and project-specific recommendations, assumptions, and limitations.
Definition
A geotechnical report communicates the results of subsurface investigation for a stated project purpose. It commonly describes the methods used, observed soil, rock, or groundwater conditions, relevant test results, design considerations, recommendations, and limitations. Its recommendations depend on the available data, stated assumptions, and the project design being considered. Firms may organize reports differently or provide separate letters and memoranda for specific design questions, so owners should compare the agreed scope and intended use. A report does not guarantee uniform ground conditions or replace the project team’s design decisions. It is also not the field investigation itself: that work produces observations and samples that the report interprets. Owners can use the ASCE professional resource when considering how geotechnical findings fit into project engineering. The report’s scope, reliance terms, and any need for updates affect how it can be used as the project develops.
How owners use it
- Confirm the report addresses the project purpose, proposed design, and requested recommendations.
- Check that methods, assumptions, data limitations, and intended reliance are clear to the project team.
- Coordinate report findings with the design team and ask whether changed project conditions call for review.
- Example: If a report covers two building areas and the project adds a third, request a scope review for the new area before relying on the existing recommendations.
