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. In 2011 the Canadian Dam Association, an association similar in nature to the ASDSO, published “Guidelines for Public Safety Around Dams”. Dam owners across Canada are embracing these Guidelines and are assessing and reduc...

Some amount of seepage passes through and under all embankment dams. The collection, monitoring, and analysis of seepage is crucial in the successful execution of any dam safety program and is helpful in deciding if it is expected ambient seepage or indicative of a more serious condition. Seepage collection methods typically include toe drains, blanket drains, and relief wells. Monitoring schemes can be grouped into several categories includi...

Failure mode evaluation or what now is more commonly referred to as potential failure mode analysis (PFMA) for dam safety has become routine practice for many in the profession. The process became more formally organized by the US Bureau of Reclamation in the early to mid 1990’s and gained wider industry exposure in the early 2000’s through the publication of FERC’s Engineering Guidelines, Chapter 14 – Dam Safety Perfo...

Tolerable risk guidelines are used to guide the process of evaluating whether or not dam safety risks are low enough. They provide a means of relating dam safety risks to other risks to which people are exposed as a result of technological hazards. While these guidelines should not be used as the only basis for dam safety decisions, they can play a useful role in making the case for a decision. This webinar will provide both examples of pract...

Although major dams are not designed or intended to fail, the unexpected occurs with tragic consequences. In the unlikely event of such a tragedy, the legal system provides remedies to compensate the victims and their families for their losses. While each state is a separate jurisdiction free to adopt its own legal rules, regulations and theories of relief, they will generally utilize the common-law theories of negligence and strict liability...

Evaluation of potential seepage failure modes in embankment dams and in particular around outlet works penetrations is a very important aspect of dam safety evaluations. Assessing potential seepage failure modes typically requires designing and evaluating investigation and instrumentation programs, and a variety of engineering analyses. Experience has shown that adverse seepage and piping conditions can develop and remain difficult to detect u...

This webinar is a follow-up to the first in this series, Risk Assessment Basics for an Individual Dam. It is recommended that the two webinars be viewed in order if possible, and both are available in the On-Demand section of the website. Risk Management for a Portfolio of Dams explains how risk assessment is being used by some owners and regulators to improve the management of dam safety for a portfolio of dams in the context of the owner...

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 mod...

This course provides an in-depth look at testing the controls using NIST SP 800-53A Rev. 4 and ensuring the use of the Risk Management Framework (RMF) for Federal Security Systems. The focus of the course is an in-depth explanation of each NIST SP 800-53 Revision 4 controls to include what method should be used to test and validate each security control in accordance with NIST SP 800-53A, Rev. 4 and NIST SP 800-115, what evidence should be gat...

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