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 G. Clark Davenport
BACKGROUND
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Professional Degree, Geophysical Engineering,
Colorado School of Mines
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A.S., Criminal Justice, Red Rocks Community College
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Registered Geophysicist in California #44
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Explosives and Demolition, US Army, 40 hours
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Chemical, Biological, Radiological Warfare School, US
Army 40-hours
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Explosives Safety and Use, 40 hours
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Borehole Log Applications and Interpretations, 40
hours
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Project Management Training, 40 hours
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OSHA 1910, 40 hours
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OSHA Supervisor Training, 8 hours
EXPERIENCE
A geophysicist with over 34 years technical expertise in
developing, planning, and managing multidisciplinary studies for exploration, mining,
engineering, groundwater, cultural/natural resource and forensic investigations. Fluent in
Spanish and has worked on projects throughout North and South America, Asia, Australia and
Europe
SELECTED PROJECTS
Coal Exploration
For Carbones Sanchez in the Dominican Republic, designed and
implemented both a seismic reflection survey and a borehole geophysical logging campaign
for a major coal exploration project. The results of the geophysical and logging program
were instrumental in determining the economic validity of the coal deposit. Also provided
added value to the project through the transfer of technology, by training Dominican
nationals in data acquisition, processing and interpretation techniques.
For the Instituto Geología y Minería de España (Spanish
Geological Survey), designed and implemented a seismic reflection survey for coal
exploration on the island Mallorca. The results indicated significant quantities of coal
however, of low grade and little commercial value.
Geothermal Exploration
For the Federal Electricity Commission of Mexico, designed
and directed a large scale, deep seismic refraction exploration program to direct and
supplement exploration drilling activities. Also implemented a transfer of technology
program, training Mexican nationals in data acquisition, processing and interpretation
techniques.
Groundwater Exploration
For the Government of the Province of Salamanca, Spain,
designed and implemented a geophysical exploration program, consisting of seismic and
resistivity surveying, as part of a groundwater exploration investigation in Spain. The
results of the surveying were used to define aquifer and aquitard geometries, depths and
thickness, and to optimize a drilling program.
For the City of Fort Hays, Kansas, designed and implemented
groundwater exploration program consisting of electrical resistivity and seismic
refraction surveys. The combined results where used by the client to design a well field
to enhance the city water supply.
Environmental
For the U.S. Army Corps of Engineers, developed the
exploration strategy and the corresponding work plan for geophysical surveying in a number
of abandoned buildings slated for demolition. The buildings were to be razed in place, and
the resulting rubble compacted for use as a foundation for future building construction.
It was imperative that the subfloor conditions of the abandoned buildings be known to
preclude differential compaction (as may have resulted from voids due to USTs, cable trays
and vaults).
For the U.S. Department of Energy (DOE), managed the first
3-dimension high resolution seismic reflection survey conducted for an environmental
investigation. Responsible for the preparation of all work related documents, oversight of
the field work and data processing, and preparation of the final report. The results of
this work were used to assist in the preparation of a hydrogeological assessment by DOE
personnel.
For the U.S. Department of Energy (DOE), designed and
implemented airborne geophysical surveys that were used as a demonstration to delineate
potential unexploaded ordinances (UXOs) on an abandoned Navy artillery range, and to
characterize the configuration of a known waste repository. The results of this survey
also provided important information on the bedrock topography, aiding in the design of a
proposed monitoring well program. A large ground-based geophysical program of magnetic and
electromagnetic surveying was conducted as follow on verification work.
Geotechnical
For Rosario Dominicana, planned and implemented an in-situ
program of geophysical measurements to provide real-time information on density changes in
tailings that were subjected to explosive loading. The tailings were being dynamically
compacted as part of seismic design criteria for the height increase in the existing
tailings dam. In addition to explosive loading, tailings were also subjected to
in-situ
air vibrations, and the resulting compaction, as demonstrated by the geophysical
measurements, was 94% as effective as the explosives compaction. The resulting savings to
the client was in the millions of dollars, since the use of explosives was replaced by
on-site air compressors.
For the U.S. Bureau of Reclamation, designed and implemented
numerous seismic refraction and self potential surveys which were used to characterize
earth embankments. The results of the seismic surveys were used to delineate anomalous, if
any, areas within an embankment and design drilling programs. The results of the self
potential surveys were used to delineate and monitor seepage systems within, around and
beneath embankments.
Through an appointment by the Mexican government, assisted
the Federal Electricity Commission on investigation strategies for hydroelectric dam
siting investigations, coal exploration programs and nuclear power plant siting
requirements. This work entailed designing and managing various field programs while
training Mexican nationals.
For the Iranian Atomic Energy Organization, designed and
implemented a seismic reflection survey as part of the site characterization package for a
nuclear power plant. The results of the seismic survey were used to map potential faults
and determine bedrock topography. A follow up investigation consisting of a crosshole
survey, was also performed as part of the feasibility study to determine compressional and
shear wave velocities, and corresponding in-situ dynamic properties, of the subsurface
materials to a depth of approximately 500 ft.
For the Government of the Kingdom of Saudi Arabia, designed
and implemented electrical resistivity surveys at twelve sites. The sites were all slated
for future construction of military facilities or hospitals, all with underground
utilities. The in-situ corrosion potential of the near surface materials was determine
based on the results of the surveys and laboratory bench studies to simulate saturated
conditions (due to proposed irrigation systems).
For the Peruvian National Energy Company, designed and
implemented large scale electrical resistivity survey as part of dam siting investigation.
Results of the survey were used to define the surface geometry and thickness of a clay
layer underlying the site at depths between 10 and 30 meters. Trained young Peruvian
professionals in data acquisition and interpretation.
Under the standards of and responsible to the U.S. Atomic
Energy Commission, designed, implemented and defended the results of geophysical surveys
used for site characterization for 27 nuclear power plants world wide. These surveys
primarily consisted of seismic reflection/refraction techniques, the results of which were
used for the Preliminary Safety Analysis Report and the Feasibility Study.
PUBLICATIONS & PRESENTATIONS
Presentation, Remote Sensing for Cultural Resource
Management, 1990 - Present, One week Intensive Course, Invited Instructor, National Park
Service, Technical Service Center, Denver, Colorado
Presentation, The Detection and Location of Human Remains,
1991 - Present, Invited Instructor, FBI Academy, Quantico, Virginia
Presentation, The Applications of Geophysics to
Environmental, Engineering, Groundwater Investigations and Mineral Exploration, 1980 -
1995, Faculty Member, Guanajuato School of Mines, Guanajuato, Mexico
"The Scientist as an Expert Witness" (with Madorian), presented at the Sixth Annual Symposium on the Applications of Geophysics to
Environmental and Engineering Problems, Keystone, Colorado (April 1996)
"Handbook of Geophysical Surveying for Criminal
Investigators", in press as an FBI training manual, 1998.
"A Multidisciplinary Approach
to the Detection of Clandestine Graves" (with France, Griffin, Swanburg,
Lindemann, Trammell, Armburst, Kondratieff, Nelson, Castellano and Hopkins), Journal of
Forensic Sciences, Vol. 37, No. 6, 1992.
"Geophysical Techniques in Archaeology, Pinon Canyon
Maneuver Site" (with DeVore), Colorado workshop co-sponsored by Interagency
Archaeological Services, Rocky Mountain Regional Office, National Park Service, 1991.
"Geoscientists and Law Officers Work Together in
Colorado" (with Griffin, Lindemann and Heimmer). Geotimes, 35 (7), 1990.
"Geophysics for
Archaeological Assessment: Fort William Discovered?" (with Heimmer, Lindemann and
Gilmore). Proceedings, SAGEEP, 1989.
"Vibration Measurement and
Control at the Pueblo Viejo Mine" (with Pena). Proceedings, SAGEEP, 1989.
"Geotechnical Applications 3, Crime Scene Investigation
Techniques, Geophysics", (with Griffin,Borowski and Lindemann). The Leading Edge of
Exploration, Vol.7 No.8, 1988.
"Forensic Geophysics, Proceedings, Le Cochon Connection,
Search Methods and Techniques for Locating Clandestine Graves", Rocky Mountain
Division of the International Identification Association, Spring conference, Englewood,
CO., 1986.
"The Use of Seismic
Refraction and Self Potential Surveys To Evaluate Existing Embankments". (with
Hadley and Randall). Proceedings, AEG Geophysical Symposium, 1985.
Cerro Prieto Geothermal Field -
CFE's Geophysical Studies (with Fonseca, de la Pena and Cruz), Poster Paper, 51st
Annual Convention, Society of Exploration Geophysicists.
"Horizontal Logging as a Monitoring Tool" (with
Hadley). Proceedings, Fourth Symposium on Uranium Mill Tailings Management, 1981.
"Geotechnical Investigations
for Corrosive Soils" (with Rinne and Zamora). UNAM Proceedings 1981.
"Planning Considerations in the Use of Geophysical
Surveys for Coal Exploration - A Case History" (with Tatman and Hadley). Proceedings,
Latin American Coal Symposium, 1981.
"Factors Affecting Blasting Operations" (with
Peters and Endacott). Pit and Quarry, Nov.-Dec., 1979.
"Geophysical Techniques for the Determination of Elastic
Properties" (with Zamoa and Negrillo). Techniterra Feb.- Mar., 1-23, 1978.
G. Clark Davenport
Countries Worked In
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Australia
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Dominican Republic
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England
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Europe
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France
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Iran
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Italy
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Korea
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Mexico
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Panama
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Peru
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Saudi Arabia
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Spain
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South Africa
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USA
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Viet Nam
Languages
Experience
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Environmental
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10 years
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Ground Water Exploration
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4 years
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Geotechnical
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15 years
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Coal/Geothermal
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5 years
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Geophysical Methods Used
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