Seepage Rehabilitation for Embankment Dams: Download

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This webinar will review the current state of the practice for rehabilitation of embankment dams to address seepage issues. Seepage rehabilitation measures can generally be grouped into two categories: seepage reduction / limitation measures and seepage collection measures. Seepage reduction /limitation measures include such features as foundation grout curtains, low permeability blankets, and seepage barrier walls. These measures are intended to reduce or limit the amount of seepage that occurs through, beneath, and around a dam. Seepage collection measures include such features as blanket drains, toe drains, chimney filters / drains, and relief wells. These measures are intended to collect seepage which occurs in a manner that maintains stability of the dam and prevents internal erosion. All of these measures will be reviewed along with discussion of their appropriate applications. Case studies and examples will be used to highlight the applications of the various methods.

John W. France, P.E., D.GE, D.WRE

President, JWF Consulting, LLC

JWF Consulting, LLC.

Mr. France has more than 45 years of consulting engineering experience. Most of his technical work for the past 37 years has focused on dams and water retention structures. He has been responsible for the analysis, design, and construction of embankment and roller compacted concrete dams and their appurtenant structures. He has served on numerous senior technical review boards and panels for dam safety projects for the U.S. Department of the Interior, Bureau of Reclamation, U.S. Army Corps of Engineers, BC Hydro, and Brookfield Renewable Energy. Mr. France was the team leader for the Independent Forensic Teams tasked with investigating the 2017 Oroville Dam, CA spillway incident and the 2020 failures of Edenville and Sanford Dams, MI.

Jennifer L. Williams, P.E.

Senior Geotechnical Engineer, AECOM

Jennifer Williams is a registered professional engineer with over 20 years of experience specializing in geotechnical design and analyses of earth dams. Ms. Williams is currently one of the managers within the AECOM dams group in the Denver office. She received her BS degree in civil engineering from Colorado School of Mines and MS degree in civil/geotechnical engineering from University of Colorado. Ms. Williams has provided dam safety engineering services including inspection, analysis, design, and risk assessment to several federal and private dam owner and operators. Ms. Williams leads the semi-annual publication on dam safety – Western Dam Engineering Tech Notes. She has conducted training on using risk-based condition assessments for managing dam inventories for the state dam safety branches of Colorado, New Mexico, and Hawaii. Ms. Williams is co-developing and co-facilitating a technical workshop on the Emergency Response to Seepage Incidents at the 2018 ASDSO national conference.

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