On-Demand Webinars

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HEC-RAS 2D Modeling
Recorded on May 9, 2017
(120 minutes)
With the release of HEC-RAS 5.0 (and newer versions), the Hydrologic Engineering Center (HEC) has added the ability to perform two-dimensional (2D) hydrodynamic routing to the HEC-RAS computer model. This webinar will provide an overview of the new HEC-RAS 2D tools and solution processes and the basic capabilities of the HEC-RAS 2D model. The 2D flow modeling can be accomplished by adding 2D flow area element.
Underwater Installation of Geomembranes
Recorded on March 14, 2017
(120 minutes)
Rehabilitation of dams with geomembranes has stopped seepage in more than 200 dams worldwide. In the 1990s, the US Army Corps of Engineers recognized that geomembranes could arrest seepage in many structures but many structures in the U.S. could not be dewatered for installation. Subsequently, a 2 phase design and testing program with the US Army Corps of Engineers adapted geomembrane system details for underwater installation.
The Fontenelle Dam Incident 1965
Recorded on February 14, 2017
(120 minutes)
Fontenelle Dam incident was, arguably, the largest dam incident in US history that did not result in failure. A large leak developed in Bureau of Reclamation’s new dam and quickly eroded a very large cavity on the downstream slope. It was only through large-scale and prompt intervention that the dam was saved. In the decades following the incident, few people – even at Reclamation – knew that it had occurred.
Risk Assessment for Levee Projects
Recorded on January 10, 2017
(120 minutes)
The USACE has been conducting economic risk analyses for evaluating benefit cost ratios for levee projects since the 1960s. With a new focus on life safety, these same analytical techniques are now being used to evaluate priorities for infrastructure investments and required design reliability to achieve various goals, including National Economic Development and life safety risk reduction.
Introduction to Dam Decommissioning
Recorded on December 13, 2016
(120 minutes)
As dams deteriorate, or as their purpose and benefits diminish, there may come a time when the appropriate action is to decommission the dam. For some dams, this can be a very simple, rapid and inexpensive undertaking. For other dams, it can be a very complex and costly process, requiring years to accomplish. The purpose of this webinar is to provide an overview of recent trends in dam decommissioning in the United States with an emphasis on the engineering and design aspects of dam decommissioning.
Intro to Tailings Dam and Coal Ash Impoundment Design, Construction and Monitoring: What Can Go Wrong and Right?
Recorded on November 8, 2016
(120 minutes)
This course provides an overview of the unique construction and design components of these facilities. This course will examine a number of recent failures that have plagued the industry but provide valuable lessons for the future.
Hydrologic Hazards – Estimating Probabilities of Extreme Floods
Recorded on October 11, 2016
(120 minutes)
This webinar provides an overview and background on current data and methods used in estimating hydrologic hazard curves for dam and levee safety.
The Practical Use of Geophysics to Assess Dam and Levee Safety
Recorded on August 9, 2016
(120 minutes)
The Practical Use of Geophysics to Assess Dam and Levee Safety
3-D Effects on Estimation of Gradients, Seepage Flows and Evaluation of Internal Erosion Potential Failure Modes
Recorded on July 12, 2016
(120 minutes)
This webinar will present the results of 2D and 3D numerical evaluations of seepage conditions around a developing piping defect. An updated model similar to the first 3D numerical model performed at the University of Florida beginning in about 1980 (Townsend, 1981) will be presented to illustrate the importance of 3D influences on estimated seepage gradients, seepage flows and the evaluation of potential internal erosion potential failure modes.
Cracking and Hydraulic Fracturing in Embankment Dams and Levees
Recorded on June 14, 2016
(120 minutes)
Cracks are likely to develop in most embankment dams and levees, and not just in those that are poorly constructed. This course will present some of the common conditions that can lead to adverse geostatic stress conditions, cracking, and hydraulic fracturing in embankments.
Strength Selection for Static Slope Stability Analysis
Recorded on May 10, 2016
(120 minutes)
This webinar will provide practical guidance on the selection of soil shear strength parameters for static slope stability analysis.
Spillway Conduits - More Than Just a Pipe Through the Dam
Recorded on April 12, 2016
(120 minutes)
This short course will present general design and construction related issues that dam engineers and owners should be aware of when considering a low-level conduit in their earthen embankment structure. Seepage control, structural integrity, and material life expectancy will be discussed.
Foundation Cutoff Walls for Dams and Levees
Recorded on March 8, 2016
(120 minutes)
During the last 10 years, there have been unparalleled levels of activity in dam and levee foundation remediation. This has been triggered mainly by the U.S. Army Corps of Engineers’ evaluation of their dam and levee portfolio following the disastrous flooding of New Orleans and surrounding areas in 2005.
Dam Safety with 3D Weirs
Recorded on February 9, 2016
(120 minutes)
Inadequate spillway capacity, significant hydrologic loadings on embankments and structures, and operation and maintenance are common dam safety issues, instigating the need for risk-reduction measures and/or rehabilitation.
Intro to the Application of 2D Hydraulic Modeling for Dam and Levee Safety
Recorded on January 12, 2016
(120 minutes)
This webinar will provide a background on 2D hydraulic modeling theory, identify steps to set up a 2D model, describe important specifications for 2D models, and summarize features available in 2D models.
Seepage Rehabilitation for Embankment Dams
Recorded on December 8, 2015
(120 minutes)
This webinar will review the current state of the practice for rehabilitation of embankment dams to address seepage issues.
Human Factors in Dam Failure and Safety
Recorded on November 10, 2015
(120 minutes)
This webinar will provide a framework for engineers, contractors, owners, regulators, inspectors, maintenance staff, and others involved with dams to systematically think about the human factors which contribute to dam failure and safety, and will include detailed discussion of several of these factors.
Rainfall and Dam Safety-From PMP to the 100-Year Storm
Recorded on October 13, 2015
(120 minutes)
The intent of this webinar is to provide non-meteorologist, hydrologist, engineers, and others involved in dam safety and design an understanding on the background of storm analysis, how they are used in PMP development, and how those data are used for precipitation frequency analysis.
Dam Construction Quality Control – Dos, Don’ts and Lessons Learned
Recorded on August 11, 2015
(120 minutes)
This webinar will present some proper and improper construction techniques that are often encountered during dam construction that are crucial to a successful project including, engineered fill placement, internal drains systems, reinforced concrete structures, RCC placement, control of water and foundation preparation.
Understanding and Managing Plant & Animal Intrusions in Embankment Dams and Levees
Recorded on July 14, 2015
(120 minutes)
This webinar will cover both plant and animal intrusions in embankment dams. Topics covered include: the identification and diagnosis of problematic situations; typical treatment methods; and strategies for preventing problems in the future.
Waterproofing Systems for Dams
Recorded on June 9, 2015
(120 minutes)
This webinar gives an overview of the 2010 ICOLD Bulletin 135 “ Geomembrane Sealing Systems for Dams” focusing on the evolving technology of exposed geomembrane sealing systems.
Event Tree Principles and Applications for Dam Safety Risk Assessment
Recorded on May 11, 2015
(120 minutes)
This webinar will summarize the principles of event trees and their application in dam safety risk assessment.
Seismic Stability Evaluation of Earth Dams
Recorded on April 7, 2015
(120 minutes)
This webinar will cover the fundamentals of these topics to provide design engineers and dam safety officials with basic knowledge to help in the analysis and review of seismic analyses of earth dams.
Designing Slope Protection for Dams and Levees
Recorded on March 10, 2015
(120 minutes)
This webinar will describe how winds produce waves in reservoirs and other enclosed bodies of water.
Introduction to Hydrologic Modeling Using Geospatial Information
Recorded on February 10, 2015
(120 minutes)
This webinar will provide an introduction to the application of geospatial information to hydrologic analysis.
Introduction to Public Safety Risk Evaluation and Treatment for Dams and Levees
Recorded on January 13, 2015
(120 minutes)
This webinar is designed to provide dam and levee owners, and their specialist consultants, an introduction to a comprehensive program to assess and reduce public safety risk around dams, levees and powerhouses.
Earthquake Hazards, Ground Motions and Dynamic Response
Recorded on December 9, 2014
(120 minutes)
Earthquakes represent a hazard to dams in many parts of the United States and therefore are of interest to design engineers and dam safety officials.
Rehabilitation of Concrete Dams
Recorded on November 12, 2014
(120 minutes)
This webinar is the third and final course in the series on Concrete Gravity Dams.
Foundation Preparation and Treatment for Dam Construction
Recorded on October 14, 2014
(120 minutes)
This webinar will address a wide range of foundation preparation and treatment methods applicable to construction of new dams, rehabilitation of existing dams, and enlargement of existing dams
Seepage Monitoring and Analysis of Embankment Dams
Recorded on August 12, 2014
(120 minutes)
This course will provide a background on collection methods including layout, access, and sediment collection techniques for toe drains and maintenance concerns associated with relief wells.
Stepped Chute Spillway Design for Embankment Dams
Recorded on July 8, 2014
(120 minutes)
Changing demographics in the vicinity of dams have led to hazard creep in a number of dams worldwide. Many of these dams now have insufficient spillway capacity as a result of these changes in hazard classification from low to significant or high hazard.
Application of PFMA in Dam Safety
Recorded on June 10, 2014
(120 minutes)
This session will focus on what to do with the results of a PFMA. So you’ve done one. So what?
Developing Operations and Maintenance Manuals for Dams
Recorded on May 13, 2014
(120 minutes)
This webinar will provide participants with information on the importance of preparing operations and maintenance (O&M) manuals for dams. It will include an overview of some of the key federal agency and state requirements and formats for dam O&M manuals.
Potential Failure Mode Analysis as a Dam Safety Tool Part I: Introduction to PFMA
Recorded on April 8, 2014
(120 minutes)
This is an introductory “how to” session for folks who are not familiar with PFMAs or who have never done a PFMA.
Quality Assurance and Field Inspection for Dam Construction Projects
Recorded on March 11, 2014
(120 minutes)
This webinar presents an introduction to the construction inspection/quality assurance process employed for new dam and dam rehabilitation projects to ensure that they are constructed as designed and to verify that the contractor complies with the terms and conditions of the contract.
How to Communicate Effectively in Any Situation
Recorded on February 11, 2014
(120 minutes)
ASDSO members are called upon to communicate in many different situations: in presentations to colleagues, in testimony before regulatory bodies and legislative committees, and interviews with reporters
Introduction to Armoring Embankment Dams and Earth-Cut Spillways with ACBs
Recorded on January 14, 2014
(120 minutes)
The purpose of this webinar is to provide practitioners with an introduction to the application of ACBs for use in armoring embankment dams and spillways.
Internal Drainage Systems for Embankment Dams
Recorded on December 10, 2013
(120 minutes)
This webinar covers the use of sand and gravel filter/drainage systems in embankment dams to protect against excessive seepage pressures, internal erosion in cracks or other anomalies, and piping.
Identifying Hazards and Improving Public Safety at Low Head Dams
Recorded on November 12, 2013
(120 minutes)
This webinar will provide participants with an understanding of the hidden dangers at low head dams and effective strategies for improving public safety.
Stability Evaluations of Concrete Dams
Recorded on October 8, 2013
(120 minutes)
The purpose of this webinar is to familiarize practitioners with the current state-of-the-practice in evaluating the stability of concrete dams.
Hydraulic Design of Labyrinth Weirs
Recorded on August 20, 2013
(120 minutes)
Labyrinth weirs are widely used in spillway rehabilitation to upgrade existing dams to meet updated spillway design flood criteria. In addition to increasing discharge capacity, these weirs are also well suited to regulating upstream pool elevations for flood control or at intake structures.
Terminal Structures and Energy Dissipation at Outlet Works and Spillways
Recorded on July 9, 2013
(120 minutes)
Effective energy dissipation of flows from outlet works and spillways is an extremely important component in dam safety.
Using Instrumentation for Dam Safety Monitoring
Recorded on June 11, 2013
(120 minutes)
Monitoring programs provide the information necessary to understanding the on-going performance of the dam, as well as the ability to detect a change in this performance, which can be critical in identifying the need to take actions to avoid the consequences of a dam failure.