May 12, 2022

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Lelio Mejia, Glenn Rix, and Christie Hale to Lead Webinar on Earthquake Engineering for Embankment Dams

Lelio Mejia, Ph.D., P.E., G.E. (California), Christie Hale, Ph.D., (California), and Glenn Rix, Ph.D., P.E., (Georgia) will serve as instructors for a webinar titled "Earthquake Engineering for Embankment Dams" on May 23–25, 2022. The course is offered through the Association of State Dam Safety (ASDSO).

Lelio Mejia is a Senior Principal Engineer based in California with more than 35 years of experience in geotechnical and earthquake engineering. For many years, he has focused on the challenges of dam and levee engineering with an emphasis on the seismic design and performance of dam structures and is a leading international authority in this field. Lelio leads Geosyntec's Western United States dams and levees practice and is a registered civil and geotechnical engineer.

Christie Hale is a seismic hazard analyst involved in seismic safety assessment projects. Her technical experience includes deterministic and probabilistic seismic hazard analysis, deaggregation analysis, target spectrum development, and time history selection and modification. Christie also has experience in probabilistic seismic hazard analysis (PSHA) code development, testing, and verification and is a key contributor to the PSHA computer program HAZ45.

Glenn J. Rix is a Senior Principal Geotechnical Engineer based in Georgia with more than 30 years of experience in geotechnical earthquake engineering and engineering seismology, focusing on seismic risk assessment for civil infrastructure. Glenn has performed seismic risk analyses, liquefaction triggering evaluations, site response analyses, and seismic stability and deformation analyses for embankment and concrete dams, coal combustion residual (CCR) storage facilities, municipal and hazardous waste landfills, liquefied natural gas facilities, and highway bridges.

The webinar provides instruction on the general subject of earthquake engineering of embankment dams. It will begin with a historical perspective on dam performance during earthquakes and an overview of basic concepts about earthquakes. The course will then address more specialized subjects including evaluation of seismic hazard and characterization of earthquake motions for dam design, field investigation methods and characterization of materials for seismic analysis, methods for analysis of dynamic response and seismic stability of dams, procedures for instrumentation and post-earthquake inspection, considerations pertinent to risk analysis, and defensive design measures. Pertinent case histories will be presented.

ASDSO is a national nonprofit organization serving state dam safety programs and the broader dam safety community, including federal dam safety professionals, dam owners and operators, engineering consultants, emergency managers, manufacturers, suppliers, academia, contractors, and others interested in improving dam safety.

Course Description

Learning objectives:

  • Understanding of the basic aspects of earthquake engineering of embankment dams
  • Primary lessons from the seismic performance of embankment dams during past earthquakes
  • Familiarity with inputs required to perform a seismic hazard analysis and how the results are used in seismic safety assessments of dams
  • Understanding of the basic elements of dynamic response and seismic stability analysis of embankment dams
  • Introduction to risk analysis concepts for embankments including potential failure mode analysis and likelihood and consequence assessment
  • Familiarity with primary aspects of defensive design measures for seismic loads

More Information

About the event: Earthquake Engineering for Embankment Dams
About ASDSO:
For consultation regarding earthquake engineering, contact Lelio Mejia at This email address is being protected from spambots. You need JavaScript enabled to view it.
Learn more about Lelio: Lelio Mejia | Geosyntec Profile
Learn more about Christie: Christie Hale | Geosyntec Profile
Learn more about Glenn: Glenn Rix | Geosyntec Profile