May/June 2022 - 111

Figure 5: Core log sheet highlighting cavities identified in red
uncertainties and
the impacts of
ground conditions
on the project.
Thus, an experienced
geotechnics
p r o f e s s i o n a l
shou l d be i nvolved
to aid in
risk identification,
allocation, manModels
like this in 3D also make
estimates of foundation repairs needed
more accurate during the design
process. This translates to better
outcomes during construction.
Conclusions
It's true, even geoprofessionals don't
have real superhero x-ray vision. But we
do have the tools needed to develop and
implement appropriate level site
investigation plans and communicate
risks to aid in making risk-informed
decisions. The geotechnics professional
is uniquely positioned to help reduce the
agement and communication of the
geotechnics conditions to the project
owner and designers in all phases.
As Professor Heinz Brandl stated in
his 1998 Mitchel Lecture " Experience
tells us that the largest source of claims
and disputes in the civil engineering
field is in the ground. " All the more
reason, then, to focus ample attention
on this big unknown right from the
start of every project and to use risk
informed decision making to optimize
our site investigations to best achieve
project goals.
The opinions presented in this article are the authors' and not necessarily that of the U.S. Army
Corps of Engineers.
Georgette Hlepas, Ph.D., P.E., is lead of the
Geo technical, Geol ogy, and Material s
Community of Practice for the U.S. Army Corps of
Engineers. She specializes in geotechnical
investigation and instrumentation and
performance monitoring.
Vanessa Bateman, P.G., P.E., D.GE, is
currently the chief of Civil Works Engineering,
Engineering & Construction Division at the U.S.
Army Corps of Engineers. She has 25+ years in the
field of geology and geotechnical engineering
working at both the Tennessee Department of
Transportation and at USACE. She has had a
long-term interest in innovation, data
management, rock stability, engineering and
construction problems.
Mary Nodine, P.E., is a project manager with
GEI Consultants in Boston, Massachusetts. She
specializes in ground improvement and deep
foundation design, geotechnical instrumentation,
slope stability and geotechnical exploration
planning. She is also chair of DFI's Subsurface
Characterization for Deep Foundations
Committee.
Special thanks to the whole
Nashville District Team for use of the
Kentucky Lock and Chickamauga Lock
photos and models - especially
William Mackie, Mark Elson and
Dewayne Ponds.
Figure 6. View in 3D along with features identified during construction
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Table of Contents for the Digital Edition of May/June 2022

TOC
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