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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).

21:35, 13 December 2022 Grichards talk contribs created page Labyrinth Spillways (Created page with "__NOTOC__ Category:Spillway Control Structures ---- “The flow capacity of a weir is largely governed by the weir length and crest shape. A labyrinth weir is a linear weir folded in plan-view; these structures offer several advantages when compared to linear weir structures. Labyrinth weirs provide an increase in crest length for a given channel width, thereby increasing flow capacity for a given upstream head. As a result of the increased flow capacity, these weirs...")
21:28, 13 December 2022 Grichards talk contribs created page Earth-Cut/Vegetated Spillways (Created page with "__NOTOC__ Category:Spillway Control Structures ---- “Vegetated auxiliary spillways typically have trapezoidal cross-sections and a grass cover to protect them from damaging erosion. They adapt well to sites capable of sustaining vigorous grass growth by normal maintenance without irrigation." <ref name="TR60">Technical Release 210-60: Earth Dams and Reservoirs, NRCS, 2019</ref> "Designs may use earth auxiliar...")
21:19, 13 December 2022 Grichards talk contribs created page Ogee-Crested Weirs (Created page with "__NOTOC__ Category:Spillway Control Structures ---- “An additional type of weir is the ogee. The downstream section of an ogee crest is parabolic shaped to mimic the underneath side of the nappe jet passing over a sharp-crested weir. Ogee weirs are commonly found in large hydraulic structures where passing the design flow at minimum head is important. For more information on ogee crests, see U.S. Department of Interior Bureau of Reclamation, [[Design of Small Dams]...")
21:16, 13 December 2022 Grichards talk contribs created page Sharp-Crested Weirs (Created page with "__NOTOC__ Category:Spillway Control Structures ---- “A weir is a notch of regular form through which water flows. The structure containing the notch is also called a weir. The edge over which the water flows is the crest. The two basic types of weirs are sharp-crested weirs and broad-crested weirs. The sharp-crested weir is used to measure the channel or stream flow. In a sharp-crested weir, the flow springs clear of the crest."<ref name="NRCS650">National Engine...")
21:07, 13 December 2022 Grichards talk contribs created page Broad-Crested Weirs (Created page with "__NOTOC__ Category:Spillway Control Structures ---- “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 fl...")
03:24, 13 December 2022 Grichards talk contribs created page Precipitation Spatial Distribution (Created page with " __NOTOC__ Category:Rainfall Runoff Modeling ----  For large watersheds, it is appropriate to consider spatial variations in precipitation depths of the design storm. "Various methods of areally distributing PMP have been developed over the years. Caution should be used in the application of these methods, and their...")
03:17, 13 December 2022 Grichards talk contribs created page Precipitation Temporal Distribution (Created page with " __NOTOC__ Category:Rainfall Runoff Modeling ----  When using precipitation depth estimates for hydrologic modeling, it is necessary to define the "temporal distribution of the rainfall, which is how the precipitation is distributed over time throughout a storm of a particular duration. For example, a 24-hour rainfa...")
03:09, 13 December 2022 Grichards talk contribs created page Precipitation Depth (Created page with " __NOTOC__ Category:Rainfall Runoff Modeling ----  "In watershed studies, it is often necessary to know the average depth of rainfall over an area.”<ref name="NEH210-640">National Engineering Handbook: Chapter 4 - Storm Rainfall Depth and Distribution | National Engineering Handbook: Chapter 4 - Storm Rainfall D...")
02:57, 13 December 2022 Grichards talk contribs deleted page Precipitation Estimates (content was: " __NOTOC__ Category:Rainfall Runoff Modeling ----  “In areas of relatively uniform terrain and little spatial variability or precipitation, classical textbook procedures, such as Thiessen polygons or the isohyetal method, can be used and are generally adequate. These procedures are simple methods of developing spatia...")
00:13, 13 December 2022 Grichards talk contribs created page Water Availability (Created page with "__NOTOC__ Category:Low Flow Conditions ---- “The determination of storage-yield relationships for a reservoir project is one of the basic hydrologic analyses for reservoirs. The basic objective can be to determine the reservoir yield given a storage allocation, or find the storage required to obtain a desired yield. The determination follows a traditional engineering approach:<ref name="EM 1110-2-1420" /> #"Determine the study objectives. This includes the proj...")
00:13, 13 December 2022 Grichards talk contribs created page Flow Regulation (Created page with "__NOTOC__ Category:Low Flow Conditions ---- “Reservoirs may improve water quality by merely <noautolinks>permitting</noautolinks> the management of flow. This management may include maintenance of minimum flows, blending selective releases from one or more reservoirs to maintain a given stream quality, and the exclusion of a flow from a system by diversion.<ref name="EM 1110-2-1420">Hydrologic Engineering Requirements for Reservoirs (EM 1110-2-1420) | EM 1110...")
23:00, 12 December 2022 Rmanwaring talk contribs created page File:Canning River fork.jpg (https://upload.wikimedia.org/wikipedia/commons/thumb/4/4d/Canning_River_fork.jpg/512px-Canning_River_fork.jpg)
23:00, 12 December 2022 Rmanwaring talk contribs uploaded File:Canning River fork.jpg (https://upload.wikimedia.org/wikipedia/commons/thumb/4/4d/Canning_River_fork.jpg/512px-Canning_River_fork.jpg)
22:55, 12 December 2022 Rmanwaring talk contribs created page Floodplain (Created page with " __NOTOC__  Category: Environmental ---- {{Picture  |image=  |link=  |caption= }}  "Channel capacity also depends on the long-term trends in downstream flo...")
22:14, 12 December 2022 Rmanwaring talk contribs created page Drinking Water Supply (Created page with " __NOTOC__  Category: Environmental ---- {{Picture  |image= Lemon_Reservoir_Colorado.jpg  |link=  |caption= Lemon Reservoir in Colorado. }}  "Regulation of re...")
22:13, 12 December 2022 Rmanwaring talk contribs created page File:Lemon Reservoir Colorado.jpg (https://upload.wikimedia.org/wikipedia/commons/thumb/9/92/Lemon_Reservoir%2C_Colorado.jpg/512px-Lemon_Reservoir%2C_Colorado.jpg)
22:13, 12 December 2022 Rmanwaring talk contribs uploaded File:Lemon Reservoir Colorado.jpg (https://upload.wikimedia.org/wikipedia/commons/thumb/9/92/Lemon_Reservoir%2C_Colorado.jpg/512px-Lemon_Reservoir%2C_Colorado.jpg)
20:36, 12 December 2022 Rmanwaring talk contribs created page Aquatic Life Movement (Created page with " __NOTOC__  Category: Environmental ---- {{Picture  |image= Fish_Ladder_Bonneville_Lock_and_Dam.jpg  |link=  |caption= Fish ladder at Bonneville Lock and Dam. }} <!-- Introductory paragraph or topic page summary...")
20:36, 12 December 2022 Rmanwaring talk contribs created page File:Fish Ladder Bonneville Lock and Dam.jpg (https://upload.wikimedia.org/wikipedia/commons/thumb/1/1a/Fish_Ladder_at_Bonneville_Lock_and_Dam%2C_June_2021.jpg/512px-Fish_Ladder_at_Bonneville_Lock_and_Dam%2C_June_2021.jpg)
20:36, 12 December 2022 Rmanwaring talk contribs uploaded File:Fish Ladder Bonneville Lock and Dam.jpg (https://upload.wikimedia.org/wikipedia/commons/thumb/1/1a/Fish_Ladder_at_Bonneville_Lock_and_Dam%2C_June_2021.jpg/512px-Fish_Ladder_at_Bonneville_Lock_and_Dam%2C_June_2021.jpg)
20:09, 12 December 2022 Rmanwaring talk contribs created page Wetlands and Waterways (Created page with " __NOTOC__  Category: Environmental ---- {{Picture  |image= PortageLake.jpg  |link=  |caption= Portage Lake on the Keweenaw Waterway in Michigan. }}  ==What...")
20:05, 12 December 2022 Rmanwaring talk contribs created page File:PortageLake.jpg (https://upload.wikimedia.org/wikipedia/commons/thumb/4/4b/Portage_Lake_on_the_Keweenaw_Waterway%2C_Michigan.jpg/512px-Portage_Lake_on_the_Keweenaw_Waterway%2C_Michigan.jpg)
20:05, 12 December 2022 Rmanwaring talk contribs uploaded File:PortageLake.jpg (https://upload.wikimedia.org/wikipedia/commons/thumb/4/4b/Portage_Lake_on_the_Keweenaw_Waterway%2C_Michigan.jpg/512px-Portage_Lake_on_the_Keweenaw_Waterway%2C_Michigan.jpg)
22:00, 9 December 2022 Grichards talk contribs deleted page Hazard Potential (content was: "__NOTOC__ Category:Environmental ----  “To assist in the evaluation of hazard potential, areas delineated on inundation maps should be classified in accordance with the degree of occupancy and hazard potential. The potential for loss of life is affected by many factors, including but not limited to the capacity and number of exit roads to higher ground and available transport...")
21:46, 9 December 2022 Grichards talk contribs deleted page Regulatory Compliance (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...")
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...")