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Combined display of all available logs of ASDSO Dam Safety Toolbox. You can narrow down the view by selecting a log type, the username (case-sensitive), or the affected page (also case-sensitive).

21:40, 9 December 2022 Grichards talk contribs deleted page Mitigation (content was: "__NOTOC__ Category:Emergency Management ----  [Paragraph here] ==Examples== {{Website Icon}} ==Best Practices Resources== {{Document Icon}} ==Trainings== {{Video Icon}} <!-- For information on notation for in text citations visit https://www.mediawiki.org/wiki/Help:Cite Or simply enclose the citation as shown <ref> citation </ref> in the location of the in text mention. Cita...")
20:50, 9 December 2022 Grichards talk contribs created page Continuity Plans (Created page with "__NOTOC__ Category:Site Security Program Management ----  "Continuity planning helps facilitate the performance of an organization's essential functions during any situation that may disrupt normal operations. A continuity plan can encompass a wide range of topics such as functional roles and responsibilities, lines of authorities, alternate personnel and operations loca...")
20:47, 9 December 2022 Grichards talk contribs created page Rapid Response Recovery Plans (Created page with "__NOTOC__ Category:Site Security Program Management ----  "Certain dam projects, especially some large federal dams, provide a wide range of economic, environmental, and social benefits to a broad community. These benefits can include irrigation, electric power generation, “black start” capabilities, water storage, recreation, navigation, flood mitigation, and contro...")
20:38, 9 December 2022 Grichards talk contribs created page Crisis Communications Plans (Created page with "__NOTOC__ Category:Site Security Program Management ----  "The initial phase of a crisis can be characterized by confusion, uncertainty, and intense media interest. Information is usually incomplete, and the facts often scattered. The organization’s communicators and decision makers will be required to collect information about what happened, separate fact from rumors,...")
20:35, 9 December 2022 Grichards talk contribs created page Hazard-Specific Response Plans (Created page with "__NOTOC__ Category:Site Security Program Management ----  "The concept of incident response—preparing for and responding to negative events affecting an organization—has long been the standard for the Dams Sector. Examples of standard practices to ensure continuity of operations during adverse events include emergency action plans, preventative maintenance programs,...")
20:27, 9 December 2022 Grichards talk contribs deleted page Emergency Action Plans (EAP's) (content was: "__NOTOC__ ----  One of the most important aspects of Emergency Management in the context of dam safety is an Emergency Action Plan (EAP). “The purpose of an EAP is to protect lives and reduce property damage”.<ref name="FEMA P-64">Federal Guidelines for Dam Safety:...", and the only contributor was "Rmanwaring" (talk))
20:12, 9 December 2022 Grichards talk contribs created page Cyber Security (Created page with "__NOTOC__ Category:Risk Assessment Site Security ----  "Key cyber risks include cyberattacks that target inadequate security controls, outdated patches, and unknown vulnerabilities; social engineering attempts designed to gain operator credentials; and intrusions from insider threats. All such attempts could allow attackers to access critical control systems and disrupt...")
20:10, 9 December 2022 Grichards talk contribs created page Physical Security (Created page with "__NOTOC__ Category:Risk Assessment Site Security ----  "Though the catastrophic failure of a dam would be difficult to achieve through a conventional terrorist attack, recent international events suggest terrorists still consider dams attractive targets because of the potential for significant economic, environmental, and public safety consequences. U.S.-based extremists...")
07:24, 9 December 2022 Grichards talk contribs created page Prepare for Emergency Response (Created page with "__NOTOC__ Category:Risk Mitigation Public Safety ---- "Escape devices include such items as life preservers, safety ropes, escape nets, escape ladders and suspended cables. These items provide a means of escape for persons who are otherwise unable to get out of hazardous waters." <ref name="FERC92">Guidelines for Public Safety at Hydropower Projects, FERC, 1992</ref> <!-- For information on notation for in text...")
07:22, 9 December 2022 Grichards talk contribs moved page Eliminate Hazards to Mitigate or Eliminate Hazards without leaving a redirect
07:19, 9 December 2022 Grichards talk contribs deleted page Mitigation Hazards (content was: "__NOTOC__ Category:Risk Mitigation Public Safety ---- "Escape devices include such items as life preservers, safety ropes, escape nets, escape ladders and suspended cables. These items provide a means of escape for persons who are otherwise unable to get out of hazardous waters." <ref name="FERC92">Guidelines for Public Safety at Hydropower Projects|Guidelines for...", and the only contributor was "Grichards" (talk))
07:16, 9 December 2022 Grichards talk contribs created page Eliminate Hazards (Created page with "In many cases, it may be possible to eliminate public safety hazards altogether through changes in operation, structural modifications, or removal of hazardous structures.")
07:14, 9 December 2022 Grichards talk contribs created page Mitigation Hazards (Created page with "__NOTOC__ Category:Risk Mitigation Public Safety ---- "Escape devices include such items as life preservers, safety ropes, escape nets, escape ladders and suspended cables. These items provide a means of escape for persons who are otherwise unable to get out of hazardous waters." <ref name="FERC92">Guidelines for Public Safety at Hydropower Projects, FERC, 1992</ref> "In certain situations, changing project ope...")
07:12, 9 December 2022 Grichards talk contribs created page Control Exposure (Created page with "__NOTOC__ Category:Risk Mitigation Public Safety ---- "Warning devices include such items as danger and warning signs, canoe portage signs, audible warning devices, lights and illumination, beacons and strobe lights, buoys, and verbal warnings. These devices are required where necessary to warn of hazardous spillways, powerhouse intake areas, tailraces, and other hazardous areas and conditions." <ref name="FERC92">Guidelines for Public Safety at Hydropower Projects...")
07:10, 9 December 2022 Grichards talk contribs created page Public Education (Created page with "__NOTOC__ Category:Risk Mitigation Public Safety ---- "Owners are usually well aware of the hazards that can exist near hydropower projects. Therefore, the owner has a unique opportunity to take the initiative to educate and inform the public of the specific hazards near its hydro projects and of the general rules that should be followed to be safety conscious. Where appropriate, information could be disseminated in recreational brochures, company literature, video t...")
03:37, 9 December 2022 Grichards talk contribs created page Communication with Organizations and the Public (Created page with "__NOTOC__ Category:Risk Communication ----  “Communications should also be provided proactively for organizations and the public that will be, could be, or consider themselves impacted by a dam failure or by dam safety actions that will restrict or modify the operations at the dam. These communications should be initiated at the planning or investigation stage to preve...")
03:30, 9 December 2022 Grichards talk contribs created page Communication with Stakeholders (Created page with "__NOTOC__ Category:Risk Communication ----  “Risk communication with stakeholders and owners is important in order to be successful. Risk communication and stakeholder participation should ensure that (1) responsible and affected stakeholders will be partners and be afforded the opportunity to participate in decisions that affect them and (2) communications regarding p...")
03:24, 9 December 2022 Grichards talk contribs created page Internal Communication (Created page with "__NOTOC__ Category:Risk Communication ----  “There are at least four levels at which communication garnered from risk studies and resulting decisions needs to take place within an organization. These include: #"Communication with employees at the dam or project site. #"Communication at the local level of the organization, where the responsibility for managing the opera...")
03:12, 9 December 2022 Grichards talk contribs created page Non-Structural Options (Created page with "__NOTOC__ Category:Risk Management ----  "Examples of non-structural Interim Risk Reduction Measures include: *"Reservoir restrictions or change in reservoir operations. If this measure is considered viable then the owner/licensee should begin immediate action to update their reservoir operations plan to reflect the operational change or reservoir restriction. In the int...")
03:06, 9 December 2022 Grichards talk contribs created page Structural Options (Created page with "__NOTOC__ Category:Risk Management ----  "Examples of structural Interim Risk Reduction Measures (some can be incorporated in long term remedial measures) include: *"Isolate problem area (e.g., cofferdam around problem monolith(s) or other project feature). *"Improve seepage collection system. *"Lower the spillway crest to aid in prevention of failure (A consequence esti...")
02:56, 9 December 2022 Grichards talk contribs created page Benefits (Created page with "__NOTOC__ Category:Risk Assessment ----  "Dams present both a benefit and a risk to the public. When dam safety risks are presented, the public may focus on the negative aspects of the dam and not realize the offsetting benefits that the dam provides. When describing dam safety issues at a given dam, the presenter should focus on the benefits as well as the risks posed b...")
00:39, 8 December 2022 Grichards talk contribs created page Breach Estimation (Created page with "__NOTOC__ Category:Risk Analysis ---- In performing a risk analysis, the magnitude of the breach opening must be estimated. See also: Breach Parameters.  {{Citations}}  {{revhistinf}}")
00:37, 8 December 2022 Grichards talk contribs created page Structural Response (Created page with "__NOTOC__ Category:Risk Analysis ---- The likelihood of an adverse structural response should be estimated and considered as part of a risk analysis. Structural responses could include dam failure, damaging spillway discharge, spillway failure, etc. <!-- In the location of an in text citation, simply enclose the citation as follows: <ref> citation </ref>. Citations will automatically populate. Learn more at https://www.mediawiki.org/wiki/Help:C...")
00:32, 8 December 2022 Grichards talk contribs created page Loading Conditions (Created page with "__NOTOC__ Category:Risk Analysis ---- The frequency of loading conditions that could initiate potential failure and then cause adverse consequences should be estimated and considered as part of a risk analysis. Loading conditions could include reservoir loads levels, floods, earthquakes, ice loading, etc. <!-- In the location of an in text citation, simply enclose the citation as follows: <ref> citation </ref>. Citations will automatically populate. Learn more a...")
23:26, 7 December 2022 Grichards talk contribs created page Technical Inspection (Created page with "__NOTOC__ Category:Surveillance and Monitoring ---- :“A visual inspection is hands-on and requires careful and close examination. The inspector should look closely at the members of connections and not just view them from a distance. Inspectors should use various measuring scales, and other hand tool to identify, measure, and locate areas of concerns. Boroscopes, flashlights, and mirrors bay be necessary to inspect areas of limited visibility. Weld gauges should be...")
03:07, 6 December 2022 Grichards talk contribs created page Inclinometer (Created page with "__NOTOC__ Category:Movement Surveillance and Monitoring ---- “The terms ‘inclinometers’ and ‘deflectometers’ are used interchangeably regarding Bureau concrete dams… Inclinometers are used to measure lateral movements in abutments and foundations of concrete dams. Inclinometer installations may consist of the ‘normal’ type, where a casing is installed and a movable inclinometer probe is used to take readings; or a ‘fixed-type’, where the inclinom...")
02:54, 6 December 2022 Grichards talk contribs moved page Rotation to Rotation or Horizontal Movement without leaving a redirect
00:45, 6 December 2022 Grichards talk contribs created page Settlement Sensors (Created page with "__NOTOC__ Category:Movement Surveillance and Monitoring ---- Pneumatic and vibrating-wire settlement sensors monitor the difference in elevation between the sensor unit and its reservoir. <ref name="Glossary"> Federal Guidelines for Dam Safety: Glossary of Terms (FEMA P-148) (FEMA, 2004)</ref>  {{revhistinf}}")
00:37, 6 December 2022 Grichards talk contribs created page Extensometers (Created page with "__NOTOC__ Category:Movement Surveillance and Monitoring ---- Borehole extensometers (single-point or multi-point) are instruments designed to measure axial displacement of a fixed point or points along its length. Extensometers can be a rod-type, or a wire-type and are usually grouted into an uncased borehole. They can be installed horizontally, vertically, or at any angle.<ref name="Glossary">Federal Guidelines for Dam Safety: Glossary of Terms (FEMA P-148)| Fede...")
00:22, 6 December 2022 Grichards talk contribs deleted page Visual Observation (Seepage) (content was: "__NOTOC__ Category:Seepage Surveillance and Monitoring ---- :“A visual inspection is hands-on and requires careful and close examination. The inspector should look closely at the members of connections and not just view them from a distance. Inspectors should use various measuring scales, and other hand tool to identify, measure, and locate areas of concerns. Boro...", and the only contributor was "Grichards" (talk))
00:04, 6 December 2022 Grichards talk contribs created page Concrete Structure Drains (Created page with "Category:Seepage Surveillance and Monitoring ---- "A system of foundation drains is installed during the construction of a gravity dam. The drainage system usually consists of pipes in the floors of the foundation gallery and foundation tunnels. Periodic measurements of flow from the individual drains should be made and recorded. When flows from drains are minimal, measurements may be made using any suitable container of known volume and noting the number of containe...")
23:54, 5 December 2022 Grichards talk contribs created page Visual Observation (Seepage) (Created page with "__NOTOC__ Category:Seepage Surveillance and Monitoring ---- :“A visual inspection is hands-on and requires careful and close examination. The inspector should look closely at the members of connections and not just view them from a distance. Inspectors should use various measuring scales, and other hand tool to identify, measure, and locate areas of concerns. Boroscopes, flashlights, and mirrors bay be necessary to inspect areas of limited visibility. Weld gauges...")
23:53, 5 December 2022 Grichards talk contribs created page Turbidity (Migration of Fines) (Created page with "__NOTOC__ Category:Seepage Surveillance and Monitoring ---- :“Weirs are preferred to flumes for measuring flow in small open channels at embankments because a weir traps sediment and debris possibly produced by internal erosion, increasing the likelihood the sediment is noticed”.<ref name="EM 1110-2-1908"> EM 1110-2-1908 Instrumentation of Embankment Dams and Levees, USACE, 2020</ref> <!-- Revi...")
23:52, 5 December 2022 Grichards talk contribs created page Embankment Drains (Created page with "__NOTOC__ Category:Seepage Surveillance and Monitoring ---- “A simple method of measuring the flow from a toe drain outfall is to catch the flow from the pipe in a container of known volume and to time how long it takes to fill the container. The flow rate is usually recorded in gallons per minute. Compare the amount of flow with the amount of flow anticipated for the current reservoir level based on previous readings. A drain that has no flow...")
23:48, 5 December 2022 Grichards talk contribs moved page Relief wells to Relief Wells without leaving a redirect
23:47, 5 December 2022 Grichards talk contribs deleted page Relief Wells (content was: "__NOTOC__ Category:Seepage Surveillance and Monitoring ---- :“Relief wells are typically vertical drains placed to relieve uplift pressure at the downstream toe of an embankment. Piezometers are typically located equidistant between two wells. Under maximum hydraulic load, the piezometric level at the downstream toe of an embankment should be lower than th...", and the only contributor was "Grichards" (talk))
23:42, 5 December 2022 Grichards talk contribs created page Relief Wells (Created page with "__NOTOC__ Category:Seepage Surveillance and Monitoring ---- :“Relief wells are typically vertical drains placed to relieve uplift pressure at the downstream toe of an embankment. Piezometers are typically located equidistant between two wells. Under maximum hydraulic load, the piezometric level at the downstream toe of an embankment should be lower than the ground surface”.<ref name="EM 1110-2-1908">Instrumentation of Embankment Dams and Levees (EM 1110-2-1908...")
23:40, 5 December 2022 Grichards talk contribs created page Piezometers (Created page with "__NOTOC__ Category:Seepage Surveillance and Monitoring :“Applications for piezometers fall into two general categories – to monitor the pattern of water flow and to provide an index of soil strength. (a) Examples in the first category include determining groundwater conditions before construction, monitoring seepage pressure distribution, and determining the effectiveness of drains, relief wells, and seepage barriers. (b) In the second category, mea...")
23:37, 5 December 2022 Grichards talk contribs created page Weirs (Created page with "__NOTOC__ Category:Seepage Surveillance and Monitoring :“Weirs are preferred to flumes for measuring flow in small open channels at embankments because a weir traps sediment and debris possibly produced by internal erosion, increasing the likelihood the sediment is noticed. However, the open channel conveying the seepage must have enough vertical drop for a weir. If the channel grade does not allow the weir to function as an unsubmerged weir, a flume may be necess...")
21:18, 5 December 2022 Grichards talk contribs created page Initial Reservoir Filling and Surveillance Record (Created page with "__NOTOC__ Category:Record Keeping ---- "An initial reservoir filling and surveillance plan should be prepared by the design staff. Initial filling should be well documented, including a record of reservoir elevations and controlled water releases during the filling. The record should include complete written justification and design approval of any deviations from the planned filling. The surveillance record should include all information obtained from inspection...")
21:18, 5 December 2022 Grichards talk contribs created page Construction Record (Created page with "__NOTOC__ Category:Record Keeping ---- "All phases of the construction should be documented, including reporting of routine and special activities. Changes in construction plans and departures from expected site conditions should be documented, with any consequent design changes. The record should include information on materials and construction processes, field exploration and test results, geologic mapping of foundations and excavations, inspection records, as...")
21:17, 5 December 2022 Grichards talk contribs created page Design Record (Created page with "__NOTOC__ Category:Record Keeping ---- "Written documentation should be maintained in standardized format on all design-related information for the project. Planning design documentation should cover the project objectives and the studies made to locate, size, classify as to potential hazard, and select the type of dam and auxiliary facilities. Site investigation documentation should cover geologic mapping and studies made of the geologic and geotechnical explora...")
20:55, 5 December 2022 Grichards talk contribs deleted page O&M Activities (content was: "__NOTOC__ Category:Operation and Maintenance ----  Click to learn more <noautolinks>about</noautolinks> different operations and maintenance activities: * Record Keeping * Operating Procedures * Vegetation Management * Controlling Animal Activity * Repairing Concrete * Site Access * Inspections * Surveillance & M...")
20:45, 5 December 2022 Grichards talk contribs deleted page Owner Responsibilties (content was: "#REDIRECT Owner Responsibilities", and the only contributor was "Rmanwaring" (talk))
22:54, 2 December 2022 Grichards talk contribs created page Siphon Spillways (Created page with "__NOTOC__ Category:Controlled Spillways ---- “These types of control structures are suited for service, auxiliary and emergency spillways, and/or outlet works. Siphon spillways have been used to help pass excess inflows (i.e., augment other hydraulic structure discharge capacity). These spillways can be designed to be self-priming or manually primed. The siphon has relatively small discharge capacity (pressurized operations), limited ability to drain the reserv...")
22:30, 2 December 2022 Grichards talk contribs created page Fusegate Spillways (Created page with "__NOTOC__ Category:Controlled Spillways ---- “These types of control structures are associated with staged releases and suited for auxiliary and emergency spillways. Fusegate spillways are a proprietary system (Patented product of Hydroplus), and its inclusion in this design standard should not be viewed as an endorsement by Reclamation. This spillway type provides a means of passing more frequent smaller flood events by overtopping the fusegates (via labyrinth or...")
22:25, 2 December 2022 Grichards talk contribs created page Fuseplug Spillways (Created page with "__NOTOC__ Category:Controlled Spillways ---- “These types of control structures are associated with staged releases and suited for auxiliary and emergency spillways. A fuseplug control structure may include one or multiple bays containing the fuseplug embankments. The zoned embankments will be placed to a specified height and include a pilot channel through each embankment crest set to a specified elevation associated with a given flood eve...")
20:56, 2 December 2022 Grichards talk contribs created page Riprap (Created page with "__NOTOC__  Category:Overtopping Protection ----  "A riprap layer on the downstream slope of an embankment dam can generally provide some protection against the initiation of embankment erosion during overtopping flow. Riprap is generally composed of high quality quarried rock (often granite, volcanics, or limestone), or occasionally concrete rubble and is dump...")
20:54, 2 December 2022 Grichards talk contribs created page Synthetic Turf Revetments (Created page with "__NOTOC__  Category:Overtopping Protection ----  "An innovative erosion protection technology was developed in 2010 for embankment dams and levees that uses artificial or synthetic turf instead of natural grass or hard armor (i.e., RCC, ACBs, and rock riprap) to eliminate the long-term maintenance requirements and potential weaknesses of traditional vegetative...")
20:49, 2 December 2022 Grichards talk contribs created page Turf Reinforcement Mats (Created page with "__NOTOC__  Category:Overtopping Protection ----  "To improve upon the erosion protection provided by plain grass, turf reinforcement methods were developed to help protect the surface soil particles, grass seeds, and seedlings (especially during the period before full turf establishment) and improve the lateral continuity between grass plants. The development...")