Geotechnical Investigations

1-1. Purpose
This manual establishes criteria and presents guidance for geotechnical investigations during the various
stages of development for civil and military projects. The manual is intended to be a guide for planning
and conducting geotechnical investigations and not a textbook on engineering geology and soils exploration.
Actual investigations, in all instances, must be tailored to the individual projects.

1-2. Applicability
This manual applies to all USACE Commands having either military or civil works responsibilities. The
objective of Corps of Engineers Engineer Manuals (EM)1 is to contain engineer and design technical
guidance that will provide essential technical direction and application within the COE. However, an
EM cannot provide the designer with two of the most vital tools essential to successful completion of a
project: experience and judgement. Engineers and geologists who are just beginning their careers are
strongly encouraged to seek the advice of more experienced members of their organization.