October 13, 2022

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Lelio Mejia Led and Coauthored New USSD Guidance on Seismic Deformations of Embankment Dams

Lelio Mejia, Ph.D., P.E., G.E. (California) coauthored the new guidance document, "Analysis of Seismic Deformations of Embankment Dams," published by the United States Society on Dams (USSD) in August 2022.

This first-of-its-kind report was written to help guide consultants, regulatory agencies, and dam owners as they choose and use numerical models to reliably estimate future deformations of embankment dams due to earthquakes.

Lelio chairs USSD's Committee on Earthquakes and the Subcommittee on Seismic Deformation Analysis of Embankment Dams. His coauthors, also fellow committee members, are Sam Abbaszadeh, Richard Armstrong, Michael Beaty, and Jack Montgomery.

A Senior Principal Engineer based in California, Lelio has more than 40 years of experience in geotechnical and earthquake engineering. He focuses on the challenges of dam and levee engineering with emphasis on design, safety, and risk assessment. An international authority in his field, Lelio developed earthquake loading criteria referenced by the International Commission on Large Dams (ICOLD) for the seismic evaluation and design of dams worldwide, and he continues to advance the state of practice. In addition to leading Geosyntec's Western United States dams and levees practice, Lelio regularly teaches and publishes and is a member of the Civil Engineering section of the National Academy of Engineering.

USSD empowers professionals to advance the sustainable benefits of dams and levees and works toward a world where all dams and levees are safe and valued by the communities they serve. As the United States member of the ICOLD, USSD provides a forum for the exchange of knowledge and experiences and is charged with leading the profession of dam and levee engineering. USSD is led by a Board of Directors representing all sectors of the industry, including consultants, contractors, owners, and academics.

More Information

Read the report: https://www.ussdams.org/wp-content/uploads/2022/10/USSD-Emb-Dam-Seismic-Deformation-Guidelines-rev080822.pdf
Learn more about USSD: https://www.ussdams.org/
For consultation regarding dam and levee engineering and seismic design, contact Lelio at This email address is being protected from spambots. You need JavaScript enabled to view it..
Learn more about Lelio: https://www.geosyntec.com/people/lelio-mejia