While not specific to tailings, this webinar includes valuable knowledge for tailings engineers. Geosynthetics have made a major impact regarding erosion control and revegetation of soil slopes. Whether temporary or permanent time frames, these easy-to-use rolled products come in many types and varieties. This webinar properly characterizes the materials and then provides designs for their use on both soil slopes and in channel/ditches. This webinar also presents laboratory bench-scale and full-scale field test methods. It also explains those methods. This webinar discusses a new generic turf reinforcement mat (TRM) specification, along with the required test methods which are necessary for use by designers and specifiers. The webinar concludes with a summary and recommendation section.
Internal erosion occurring at federal (and nonfederal) embankment dams and levees poses a threat of failure and potential risk to public safety. This document presents a summary of current federal practices for monitoring and measuring seepage, identifying potential failure modes related to internal erosion, assessing risk related to internal erosion, and remediating internal erosion. While research continues into these processes, this document attempts to present the best understanding based on current federal agency practice. Hence, very recent or new, unproven technologies are not discussed.
This paper provides practical guidance for vegetative measures for slope stabilization. These measures are not a substitute for structural engineering measures.
Part of an eight volume series, the purpose of this document is to provide practical guidance for gully control including a description of the factors affecting gully formation and a classification of gullies. Control measures include diversions and the specifications for various types of check dams and gully plugs.
The purpose of this document is to provide practical guidance on land preparation for afforestation and cultivation on sloping land affected by water erosion. Part I deals with practices and-techniques for land clearing and preparation for afforestation in watersheds. Special consideration is given to environmental effects and means to minimize erosion. Part II on terraces and ditches describes conservation methods and land treatment for agricultural use of sloping land, ranging from annual to permanent crops. Layout, construction and maintenance of terraces and hillside ditches are described in detail, as well as the protection of terrace risers, outlets and waterways.
Risk-Informed Decision-Making (RIDM) is a method of dam safety evaluation that uses the likelihood of loading, system response given the loading, and consequences of failure to estimate risk. This risk estimate can be used to inform decisions regarding dam safety investments. This approach has many benefits including a greatly improved understanding of the safety of the dam and identifying dam safety vulnerabilities that have not been identified using standards-based evaluation techniques. This website includes dam safety guidelines to evaluate consequences of failure and is intended for use on water dams.
The technology behind industrial applications such as fluids with high percentage solids continues to evolve, as do the corresponding regulations and specifications that ensure the safety of workers and the environment. Valves make up key aspects of this technology and often represent the single point of failure for entire operations. More often than not, the valves being used in high percentage solids applications are known as severe service valves (SSVs) due to their ability to withstand extreme conditions. Most experts agree that SSVs are identified by applications, and that these applications are challenging to the valves ability to provide a minimum acceptable level of performance over a minimum acceptable duration. This paper serves to determine what the minimum requirements are for SSVs in high percentage solids applications specifically concentrating on paste and thickened tailings.
Inadequate spillway capacity is a common problem with many dams. Thousands of dams throughout North America have been determined to have inadequate spillway capacity and would be overtopped during the infow design food. Dam failure from overtopping can lead to a potential for loss of life and signifcant downstream damages. Thus, new design approaches have been developed that may allow for the dam to be safely overtopped. The design and construction of overtopping protection for dams is increasingly being viewed as a viable alternative to larger spillways as developing watersheds or changing hydrology produce higher peak fows.