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  • 2001 Dam Safety Conference Proceedings

    Contains 1 Component(s)

    The following is a compendium of technical papers which were presented at the 2001 ASDSO Annual Conference held at the Snowbird Resort in Snowbird, Utah on September 9-12, 2001.

    The following is a compendium of technical papers which were presented at the 2001 ASDSO Annual Conference held at the Snowbird Resort in Snowbird, Utah on September 9-12, 2001. All presentations except the general session presentations on Monday and those papers not received by the print date are published here. Reports on other activities, such as the welcome remarks, administrative meetings and awards presentations were published in the ASDSO ENews and distributed to all members.  Papers were chosen from over 120 submittals by the conference program committee, chaired by Matt Lindon, (Utah Dam Safety). The ASDSO Board of Directors gave final approval to all conference speakers. ASDSO wishes to thank all those who submitted abstracts. A special thanks goes to all speakers, moderators, and session coordinators for their contributions to the conference.

    Special thanks to Matt Lindon for overseeing the technical agenda and to committee members Richard DeBold, Steve Fry, Meg Galloway, Doug Johnson, Michele Lemieux, Blake Tullis, Yvonne Gibbons, Steve Jorgensen, Larry Ferns, and Fred Sage. Congratulations on a job well done to Matt Lindon of the Utah Dam Safety Division for his contribution as host; to Steve Fry of Avista Corp. for organizing the moderators; and, to Susan Sorrell, ASDSO conference director, for her year-round work on this event.

  • Internal Erosion – Applying Erosion Mechanics From ICOLD Bulletin 164 In Internal Erosion Failure Mode Analyses- DOWNLOAD

    Contains 1 Component(s)

    This is a DOWNLOAD version of the January 8, 2019 live webinar. This webinar discusses the two volumes of ICOLD Bulletin 164 (ICOLD 2017, ICOLD, 2016) and reflects the results of a group of international experts to collect information from experience, case histories and research to provide guidance on internal erosion for engineers in dams and levees.

    Internal erosion causes about half of all failures of water-retaining earth embankment dams. Similar statistics apply to levees. Internal erosion occurs when the hydraulic loads imposed by water seeping through the pores or flowing through cracks and openings in the soils in embankments and their foundations generate erosive forces sufficient to overcome the resistance to erosion of those soils. The knowledge of internal erosion processes has advanced significantly over the past two decades. The two volumes of ICOLD Bulletin 164 (ICOLD 2017, ICOLD, 2016) reflects the results of a group of international experts to collect information from experience, case histories and research to provide guidance on internal erosion for engineers in dams and levees. The accumulation of knowledge led to the definition and understanding of the mechanics of the four modes of internal erosion. This understanding of internal erosion mechanics makes it possible for engineers to estimate the hydraulic load that will likely cause internal erosion to failure. The mechanics of the modes of internal erosion (mechanisms) can be combined with the internal erosion pathways through embankments and their foundations to developed detailed descriptions of potential failure modes (PFMs). If desired these detailed PFM descriptions can be used in quantitative risk analyses. This webinar will include discussion of all of the concepts described above, with reference to how the Bulletin provides a reference to the application of these concepts in dam safety evaluations and risk analyses.

    Five Learning Objectives of This Course:

    • Exposure to the international knowledge concerning internal erosion reflected in ICOLD Bulletin 164
    • Understanding of the four mechanisms of internal erosion (IE)
    • Understanding of how IE mechanisms combine with pathways to create potential failure modes
    • Improved ability to estimate IE erosion risks, both quantitatively and qualitatively
    • Improved ability to identify vulnerabilities to internal erosion for existing dams and levees

    Rodney Bridle

    Principal, Dam Safety Ltd.

    Rodney Bridle is the UK Member of the ICOLD Technical Committee on Embankment Dams. He is the editor and part-author of the two volumes of ICOLD Bulletin 164 on Internal Erosion in Existing Dams, Dikes and Levees, which deal primarily with the mechanics of internal erosion. To spread this important new knowledge he has written papers, participated in workshops and made many presentations around the world. Rod is a widely experienced consulting civil engineer specializing in the performance and safety of embankment dams. His particular present interest is in applying new and old knowledge to understand the behavior of the now large numbers of existing embankment dams and levees to make them safe and economically effective. He has completed many quantitative risk assessments using UK guidance; some were presented at ASCE Geo-risk in Denver in 2017 and at ICOLD in Vienna in 2018. He has supervised substantial and minor safety works at dams vulnerable to internal erosion. He is  a member of BC Hydro’s Expert Engineering Panel with Emeritus Professor Robin Fell (University of New South Wales, Australia) and Dr Kaare Hoeg (Norwegian Geotechnical Institute) reviewing the seepage control functions of existing high dams in Canada. He was a Partner and Director of Watson Hawksley and Montgomery Watson (later MWH, now Stantec) and is a former Chair of the British Dam Society and a life member of USSD.

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

    President, JWF Consulting, LLC

    John W. France, PE, D.GE, D.WRE is a registered professional engineer providing consulting services through JWF Consulting LLC. He received BS and MS degrees in civil engineering from Cornell University. John has more than 40 years of consulting engineering experience, during which time he has worked on hundreds of civil engineering projects. For the past 35 years his professional career has been focused on dam engineering and dam safety services. During his career, John has been involved in various capacities in evaluating and remediating seepage issues for earth dams. He has written numerous papers on the topic, and in 2012 he was an invited speaker at a FEMA workshop on filters and seepage remediation. He was engaged by the Montana Dam Safety office to prepare a technical note on chimney filter design for posting on the State’s website, and he has been an instructor for ASDSO’s seepage analysis course; ASDSO workshops on seepage rehabilitation and internal erosion failure modes; and U.S. Army Corps of Engineers’ courses on seepage rehabilitation and embankment dam design. John has participated as facilitator or subject matter expert on numerous risk analyses of internal erosion issues, most recently serving as facilitator for an internal erosion risk analysis for Mosul Dam in Iraq. In 2017, he was the leader of the Independent Forensic Team charged with identifying the causes of the February 2017 Oroville Dam spillway incident.

    • INTERNAL EROSION AS SEEN BY ICOLD BULLETIN 164
      • Introduction to ICOLD
      • Need for guidance – failures, fatalities, speed of failure
      • Bulletin responds to needs – new knowledge
      • Mechanics of internal erosion – failures when water level high during floods
      • Four internal erosion failure modes, estimating water levels causing internal erosion failure, case histories
      • Contact erosion
      • Concentrated leak erosion
        • Crack locations
        • Filter erosion boundaries approach to filtering capacity of dam fill
        • Vulnerability at spillways and culverts
      • Suffusion
      • Backward erosion (and piping)
      • Summary of four modes of erosion mechanics
      • Addressing internal erosion potential in dams – before critical flood occurs
    • INTERNAL EROSION FAILURE MODE ANALYSES & RISK ASSESSMENT
      • Examples of potential failure routes
      • Events where subjective assessments necessary
      • How using ICOLD Bulletin 164 will improve PFMA
      • Probability estimation for risk analysis
      • Probability estimated from critical flood level from ICOLD 164 internal erosion analyses
      • Some examples of internal erosion risk assessment
    • SUMMARY & RECOMMENDATIONS

     

     

  • Reexamination of the 2004 Failure of Big Bay Dam, Mississippi- ON-DEMAND

    Contains 4 Component(s), 2 credits offered

    This is an ON-DEMAND version of the May 8, 2018 Webinar. This webinar will review the 2004 failure of Big Bay Dam.

    This webinar will review the 2004 failure of Big Bay Dam.  A potential failure modes framework was used to make the forensic root-cause assessment based on data and information provided by the State of Mississippi.  A detailed timeline of the failure obtained through review of court proceedings will be presented including the appearance of a number of distress indicators, the seriousness of which were not recognized and acted upon by the Owner and the owner Engineer.  Of particular interest is the influence of piping and erosion of highly erodible fine sandy silt and silty fine sand through open defects in the outlet works conduit.   The full failure mode likely developed through a series of backward erosion initiation/continuation cycles that began under the upstream slope of the dam and moved toward the downstream end of the conduit over a period of about thirteen years.  The rapidity of the final steps in the failure mode development leading to breach of the dam are quite stunning and serve to reinforce the importance of detecting and mitigating seepage distress in embankments as early as possible in the development process and prior to later stages of continuation/progression when adequate time or intervention methods are not available to stop the failure process.  A generalized risk analysis event tree of the failure mode will be presented and described.

    Keith A. Ferguson, P.E.,DWRE

    HDR Engineering, Inc./Dam and Hydraulic Structures Practice Leader

    Keith Ferguson has over 40 years of planning, design, and construction experience for over 160 dams, levee, spillways, outlet works, canals and tunnels projects across the US and internationally.  He holds Bachelor and Master of Science degrees from the University of Colorado in Civil and Geotechnical Engineering and is a registered professional engineer in 18 states.  He is a recognized leader in dam safety, risk analysis, seepage and stability analyses, seismic response evaluations for embankment and concrete dams, in rock mechanics, and in design of embankment, roller compacted concrete, and rockfill dams.  He recently completed a 7 year term as Director including a 2 year term as President of USSD.  He was chair of the ASDSO Dam Safety Journal Editorial Committee from 2008 through 2013. He is currently serving a chair of the USSD Advocacy initiative and the joint USSD Advocacy, Communication, and Public Awareness Committee.  He is Vice-chair of the USSD History Committee. 

    1. Introduction
      1. Summarize overall Incident and Timeline
    2. Key Learning Objectives
      1. Expanded understanding of Potential Failure Modes (PFM’s), and how to identify and assess them
      2. Expanded understanding of key factors that contribute to seepage failure mode development
    3. Some Seepage Basics;
      1. Internal Erosion (IE)Mechanisms
      2. The IE/Piping Failure Mode Continuum: Initiation, Continuation, Progression, and Breach Formation
      3. Factors Influencing IE and Piping Processes
      4. Key Factors in Assessing Dam Safety Risks of IE/Piping
    4. Design and Construction of Big Bay Dam
      1. Examination of cross-section
      2. Lack of critical design features that reduce risk of PFM development
      3. Lack of monitoring
    5. Distress Indicators;
      1. Conduit cracks and leakage
      2. Sinkhole(s)
      3. Sediment filled outlet discharge basin
      4. Changes in seepage outflow from toe drain system
    6. Detailed failure development timeline
    7. PFM description (building from the IE/Piping failure mode continuum)
    8. Lessons learned
    9. Summary and Conclusions

     

  • 1997 Dam Safety Conference Proceedings

    Contains 1 Component(s)

    The following is a compendium of technical papers which were presented at the 1997 ASDSO Annual Conference held at the Pittsburgh Hilton & Towers Hotel in Pittsburgh, Pennsylvania on September 8-10, 1997.

    The following is a compendium of technical papers which were presented at the 1997 ASDSO Annual Conference held at the Pittsburgh Hilton & Towers Hotel in Pittsburgh, Pennsylvania on September 8-10, 1997. All presentations except the general session presentations on Monday and those papers not received by the print date are published here.  Papers were chosen from over 100 submittals by the conference program committee, chaired by Jim Alexander (Missouri state representative). The ASDSO Board of Directors gave final approval of all speakers. ASDSO wishes to thank all those who submitted abstracts. A special thanks to all speakers, moderators, and session coordinators for their contributions to the conference.  

    Special thanks to Jim Alexander for overseeing the technical agenda and his committee: Ken Stern (New Hampshire), Ed Fiegle (Georgia), Don Martino (Pennsylvania), Mel Schaefer Washington), Don Eskridge (Reitz & Jens, Inc.) and Dale Frink (North Dakota); to Don Martino and his staff and the Pennsylvania Department of Environmental Resources for their contributions as hosts; to Terry Hampton and Pat Peyton (Mead& Hunt, Inc.) for organizing the moderators; and, to Susan Sorrell, ASDSO conference director, for her year-round work on this event.

  • 1998 Dam Safety Conference Proceedings

    Contains 1 Component(s)

    The following is a compendium of technical papers which were presented at the 1999 ASDSO Annual Conference held at the Hyatt Regency Hotel in St. Louis, Missouri on October 10 - 13, 1999.

    The following is a compendium of technical papers which were presented at the 1998 ASDSO Annual Conference held at the Riviera Hotel in Las Vegas, Nevada on October 11-14, 1998. All presentations except the general session presentations on Monday and those papers not received by the print date are published here.  Papers were chosen from over 100 submittals by the conference program committee, chaired by Dale Frink (North Dakota state representative). The ASDSO Board of Directors gave final approval of all speakers. ASDSO wishes to thank all those who submitted abstracts. A special thanks to all speakers, moderators, and session coordinators for their contributions to the conference.

    Special thanks to Dale Frink for overseeing the technical agenda and his committee: Ken Stern (New Hampshire), Ed Fiegle (Georgia), Jim Alexander (Missouri), Jason King (Nevada), Karl Myers (Piedmont Geotechnical Consultants) and Eric Ditchey (Schnabel Engineering); to Jason King and his staff and the Nevada Division of Water Resources for their contributions as hosts; to Terry Hampton and Cherrie Warren (Mead & Hunt, Inc.) for organizing the moderators; and, to Susan Sorrell, ASDSO conference director, for her year-round work on this event.

  • 1999 Dam Safety Conference Proceedings

    Contains 1 Component(s)

    The following is a compendium of technical papers which were presented at the 1999 ASDSO Annual Conference held at the Hyatt Regency Hotel in St. Louis, Missouri on October 10 - 13, 1999.

    The following is a compendium of technical papers which were presented at the 1999 ASDSO Annual Conference held at the Hyatt Regency Hotel in St. Louis, Missouri on October 10 - 13, 1999. All presentations except the general session presentations on Monday and those papers not received by the print date are published here. Reports on other activities, such as the welcome remarks, administrative meetings and awards presentations were published and distributed to all members.  Papers were chosen from over 100 submittals by the conference program committee, chaired by Laurence Siroky, (MT state representative). The ASDSO Board of Directors gave final approval to all conference speakers. ASDSO wishes to thank all those who submitted abstracts.  A special thanks goes to all speakers, moderators, and session coordinators for their contributions to the conference.

    Special thanks to Laurence Siroky for overseeing the technical agenda and to committee members Richard DeBold, Matt Lindon, John Moyle, Mark Ogden, Leon Smothers, Steve Fry, Terry Hampton, Dan Mahoney, and Darrel Temple. Congratulations on a job well done to Jim Alexander and his staff at the Missouri Dam Safety Program and Bob Dalton and the staff at the Illinois Division of Water Resources for their contributions as hosts; to Steve Fry of Avista Corp. for organizing the moderators; and, to Susan Sorrell, ASDSO conference director, for her year round work on this event.  

  • 2000 Dam Safety Conference Proceedings

    Contains 1 Component(s)

    The following is a compendium of technical papers which were presented at the 2000 ASDSO Annual Conference held at the Westin Hotel in Providence, RI on September 28-30, 2000.

    The following is a compendium of technical papers which were presented at the 2000 ASDSO Annual Conference held at the Westin Hotel in Providence, Rhode Island on September 28 – 30, 2000. All presentations except the general session presentations and those papers not received by the print date are published in this book. Reports on other activities, such as the welcome remarks, administrative meetings and awards presentations were published in the ASDSO ENews and distributed to all members.  Papers were chosen from over 120 submittals by the conference program committee, chaired by Richard DeBold, (NH state representative). The ASDSO Board of Directors gave final approval to all conference speakers. ASDSO wishes to thank all those who submitted abstracts. A special thanks goes to all speakers, moderators, and session coordinators for their contributions to the conference.  

    Special thanks to Richard DeBold for overseeing the technical agenda and to committee members Cecil Bearden, Steve Fry, Meg Galloway, Terry Hampton, George Mills, Alan Pearson, Leon Smothers, Darrell Temple, and Chris Veesaert. Congratulations on a job well done to Paul Gugliemino of the Rhode Island Department of Environmental Management for his contribution as host; to Steve Fry of Avista Corp. for organizing the moderators; and, to Susan Sorrell, ASDSO conference director, for her year-round work on this event.

  • 2002 Dam Safety Conference Proceedings

    Contains 1 Component(s)

    The following is a compendium of technical papers which were presented at the 2002 ASDSO Annual Conference held at the Saddlebrook Resort in Tampa, Florida on September 8-11, 2002.

    The following is a compendium of technical papers which were presented at the 2002 ASDSO Annual Conference held at the Saddlebrook Resort in Tampa, Florida on September 8-11, 2002.  All presentations except the general session presentations on Monday and those papers not received by the print date are published here. Reports on other activities, such as the welcome remarks, administrative meetings and awards presentations were published in the ASDSO ENews and distributed to all members.

    Papers were chosen from over 120 submittals by the conference program committee, chaired by Ken Smith of the Indiana Department of Natural Resources. The ASDSO Board of Directors gave final approval to all conference speakers. ASDSO wishes to thank all those who submitted abstracts. A special thanks goes to all speakers, moderators, and session coordinators for their contributions to the conference.
    Special thanks to Ken Smith for overseeing the technical agenda and to committee members 

    Matt Lindon, Siavash Beik, Terry Hampton, Bruce Tschantz, Michelle Lemieux, Mike Meadows, Brad Iarossi, Mark Locke and John Ritchey. Congratulations on a job well done to Steve Partney of the Florida Bureau of Mine Reclamation for his contributions as host; to Steve Snider of Jenny Engineering Corp. for organizing the moderators, and to Susan Sorrell, ASDSO conference director, for her year-round work on this event.

  • 2003 Dam Safety Conference Proceedings

    Contains 1 Component(s)

    The following is a compendium of technical papers which were presented at the 2003 ASDSO Annual Conference held at the Hyatt Regency in Minneapolis, Minnesota on September 7-10, 2003.

    The following is a compendium of technical papers which were presented at the 2003 ASDSO Annual Conference held at the Hyatt Regency in Minneapolis, Minnesota on September 7-10, 2003. All presentations received by the print date are published here. Reports on other activities, such as the welcome remarks, administrative meetings and awards presentations were published in the ASDSO E-News and distributed to all members.

    Papers were chosen from over 100 submittals by the conference program committee, chaired by Ken Smith of the Indiana Department of Natural Resources. The ASDSO Board of Directors gave final approval to all conference speakers. ASDSO wishes to thank all those who submitted abstracts.

    A special thanks goes to all speakers, moderators, and session coordinators for their contributions to the conference. Special thanks to Ken Smith for overseeing the technical agenda and to committee members Dan Marks, Bruce Tschantz, Mark Locke, John Ritchey, Keith Banachowski, Dennis Zebell, Steve Snider, Jason Boyle, and Robert Martinez.  Congratulations on a job well done to Dana Gauthier of the Minnesota Department of Natural Resources for his contributions as conference host; to Steve Snider of Jenny Engineering Corp. for organizing the moderators, and to Susan Sorrell, ASDSO conference director, for her yearround work on this event.

  • 2004 Dam Safety Conference Proceedings

    Contains 1 Component(s)

    The following is a compendium of technical papers which were presented at the 2004 ASDSO Annual Conference held September 26-30 at the Pointe South Mountain Resort in Phoenix, Arizona.

    The following is a compendium of technical papers which were presented at the 2004 ASDSO Annual Conference held September 26-30 at the Pointe South Mountain Resort in Phoenix, Arizona. All presentations received by the print date are published here. Reports on other activities, such as the welcome remarks, administrative meetings and awards presentations were published in the ASDSO ENews and distributed to all members.

    Papers were chosen from over 140 abstract submittals by the conference program committee, chaired by John Ritchey of the New Jersey Department of Environmental Protection, Dam Safety Section. The ASDSO Board of Directors gave final approval to all conference speakers. ASDSO wishes to thank those who submitted abstracts, speakers, poster presenters and moderators for their contributions to the conference.

    A special thanks to Mark Ogden for overseeing the technical agenda and to Working Group members John France, David Gutierrez, Linda Hyatt, Bill Jenkins, Guy Paul, John Ritchey, Steve Snider, and Bruce Tschantz. Congratulations on a job well done to Bill Jenkins and the staff of the Arizona Department of Water Resources for their contributions as conference hosts; to Steve Snider and Terry Hampton for coordinating the moderators program, and to Susan Sorrell, ASDSO Conference director for her year round work on this event.