ASDSO Dam Safety Toolbox

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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).

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  • 23:34, 7 September 2022 Rmanwaring talk contribs created page Operations and Maintenance (Created page with "__NOTOC__ ---- <!-- Delete any sections that are not necessary to your topic. Add pictures/sections as needed --> While a thorough and detailed design and construction process decreases the chance that major problems arise in the life span of a dam; without proper operation and maintenance of the dam, the safety of the dam is put in jeopardy. Additionally, site conditions including changing upstream and downstream hydrology, deterioration of the embankment or concrete, d...")
  • 23:33, 7 September 2022 Rmanwaring talk contribs created page Federal Guidance and Resources (Created page with "__NOTOC__ ---- <!-- Delete any sections that are not necessary to your topic. Add pictures/sections as needed --> [Paragraph here] Bureau of Indian Affairs</br> Bureau of Reclamation</br> Department of Homeland Security</br> Federal Emergency Management Agency (National Dam Safety Program)</br> Federal Energy Regulatory Commission</br> National Park Service</br> Natural Resource Conservation Service</br> Tennessee Valley Authority</br> ...")
  • 23:29, 7 September 2022 Rmanwaring talk contribs created page State Regulation and Resources (Created page with "__NOTOC__ ---- <!-- Delete any sections that are not necessary to your topic. Add pictures/sections as needed --> Alabama</br> Alaska</br> Arizona</br> Arkansas</br> California</br> Colorado</br> Connecticut</br> Delaware</br> Florida</br> Georgia</br> Hawaii</br> Idaho</br> Illinois</br> Indiana</br> Iowa</br> Kansas</br> Kentucky</br> Louisiana</br> Maine</br> Maryland</br> [[Massachusetts]...")
  • 23:23, 7 September 2022 Rmanwaring talk contribs created page State & Federal Regulation (Created page with "__NOTOC__ ---- <!-- Delete any sections that are not necessary to your topic. Add pictures/sections as needed --> As a result of several notable dam failures throughout the United States, the passage of the National Dam Inspection Act (PL 92-367) in 1972 started a major push to increase public safety by implementing a national dam inspection program for dams not owned by the federal government. “The activities performed under the program consisted of an inventory of da...")
  • 23:20, 7 September 2022 Rmanwaring talk contribs created page Other Appurtenant Structures (Created page with "__NOTOC__ ---- <!-- Delete any sections that are not necessary to your topic. Add pictures/sections as needed --> [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. Citations will automatically po...")
  • 23:19, 7 September 2022 Rmanwaring talk contribs created page Decommissioning of a Reservoir (Created page with "__NOTOC__ ---- <!-- Delete any sections that are not necessary to your topic. Add pictures/sections as needed --> Once the costs associated with continued maintenance begin to outweigh the benefits of a dam, serious consideration of decommissioning the dam is warranted. Dam decommissioning eliminates the potential for abandonment of the dam and an elevated risk of failure as a result. ==Examples== {{Website Icon}} ==Best Practices Resources== {{Document Icon}} ==Traini...")
  • 23:19, 7 September 2022 Rmanwaring talk contribs created page O&M of a Reservoir (Created page with "__NOTOC__ ---- <!-- Delete any sections that are not necessary to your topic. Add pictures/sections as needed --> Deposition of sediments in the reservoir is problematic as it reduces the reservoir’s potential storage capacity. These accumulated sediments can be removed in a variety of ways including sluicing through the bottom outlet of the dam (if one exists) and dredging. “Existing reservoirs are routinely surveyed to determine sediment deposition and resulting...")
  • 23:17, 7 September 2022 Rmanwaring talk contribs created page Design and Construction of a Reservoir (Created page with "__NOTOC__ ---- <!-- Delete any sections that are not necessary to your topic. Add pictures/sections as needed --> “Reservoir operating goals vary with the storage in the reservoir. The highest zone in the reservoir is that space reserved at any particular time for the control of floods. This zone includes the operational flood control space and the surcharge space required for the passage of spillway flows. Whenever water is in this zone it must be released in accordan...")
  • 23:16, 7 September 2022 Rmanwaring talk contribs created page Reservoirs (Created page with "__NOTOC__ ---- <!-- Delete any sections that are not necessary to your topic. Add pictures/sections as needed --> Reservoirs are artificial bodies of water impounded behind a dam for one or more intended purposes including water storage, flood protection, hydropower generation, or recreation. ==Components of a Reservoir== [Paragraph here] ==Life Cycle of a Reservoir== [Paragraph here] #Design and Construction of a Reservoir #O&M of a Reservoir #Decommission...")
  • 23:13, 7 September 2022 Rmanwaring talk contribs created page Canals (Created page with "__NOTOC__ ---- <!-- Delete any sections that are not necessary to your topic. Add pictures/sections as needed --> “Canals are constructed channels of widely varying capacities used to convey water for irrigation, power, domestic uses, or drainage. Distributory channels conveying water from the main canal to farm units are called laterals and sublaterals. The design capacity of an irrigation canal or lateral is based on maximum daily consumptive use rate downstream of t...")
  • 23:12, 7 September 2022 Rmanwaring talk contribs created page Flumes (Created page with "__NOTOC__ ---- <!-- Delete any sections that are not necessary to your topic. Add pictures/sections as needed --> “The most common structures used to measure flow in open channels operate by producing critical flow or flow at critical-depth through a control section of known dimensions. Under this flow condition, the discharge through the critical section is a function of the section shape and the upstream potential energy, as indicated by the water level upstream from...")
  • 23:08, 7 September 2022 Rmanwaring talk contribs created page Penstocks (Created page with "__NOTOC__ ---- <!-- Delete any sections that are not necessary to your topic. Add pictures/sections as needed --> Penstocks are used in projects that produce electricity using hydroelectric power plants integrated into the design of the dam. “The penstock conveys water from the intake structure to the powerhouse and can take many configurations, depending upon the project layout. Where the powerhouse is an integral part of the dam, the penstock is simply a passage th...")
  • 23:07, 7 September 2022 Rmanwaring talk contribs created page Emergency Spillways (Created page with "__NOTOC__ ---- <!-- Delete any sections that are not necessary to your topic. Add pictures/sections as needed --> “An emergency spillway is designed to provide additional protection against overtopping of a dam and/or dike and is intended for use under unusual or extreme conditions such as misoperation or malfunction of the service spillway or outlet works during very large, remote floods (such as the PMF), or other emergency conditions. As with auxiliary spillways, s...")
  • 23:06, 7 September 2022 Rmanwaring talk contribs created page Design and Construction of Auxiliary Spillways (Created page with "__NOTOC__ ---- <!-- Delete any sections that are not necessary to your topic. Add pictures/sections as needed --> “The general considerations for selecting the type and size of a new spillway and/or modifying an existing spillway include: project requirements (frequency and duration of operation, along with flood control requirements); dam type (concrete, embankment, composite); site conditions (topography, geology, and climate); hydrologic and seismic loading requirem...")
  • 23:04, 7 September 2022 Rmanwaring talk contribs created page Auxiliary Spillways (Created page with "__NOTOC__ ---- <!-- Delete any sections that are not necessary to your topic. Add pictures/sections as needed --> “An auxiliary spillway is infrequently used and may be a secondary spillway (augmenting a service spillway discharge capacity). During operation there could be some degree of structural damage or erosion to the auxiliary spillway due to releases up to and including the maximum design discharge. Auxiliary spillways may be less robust, erosion-resistant str...")
  • 23:01, 7 September 2022 Rmanwaring talk contribs created page O&M of Principal Spillways (Created page with "__NOTOC__ ---- <!-- Delete any sections that are not necessary to your topic. Add pictures/sections as needed --> [Paragraph here] ==Other Headings== [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 men...")
  • 23:01, 7 September 2022 Rmanwaring talk contribs created page Design and Construction of Principal Spillways (Created page with "__NOTOC__ ---- <!-- Delete any sections that are not necessary to your topic. Add pictures/sections as needed --> [Paragraph here] ==Other Headings== [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 men...")
  • 22:58, 7 September 2022 Rmanwaring talk contribs created page Principal Spillways (Created page with "__NOTOC__ ---- <!-- Delete any sections that are not necessary to your topic. Add pictures/sections as needed --> Also known as “Service Spillways” according to the United States Bureau of Reclamation: “A service spillway provides continuous, or frequent regulated, or staged releases (controlled) or unregulated (uncontrolled) releases from a reservoir without significant damage to the dam, dike, or appurtenant structures due to releases up to and including the maxi...")
  • 22:45, 7 September 2022 Rmanwaring talk contribs created page Uncontrolled Spillways (Created page with "__NOTOC__ ---- <!-- Delete any sections that are not necessary to your topic. Add pictures/sections as needed --> “A controlled crest is one that includes gates which are used to control the flow; the uncontrolled crest is one unencumbered by gates”.<ref name="EM 1110-2-1603"> EM 1110-2-1603 Hydraulic Design of Spillways, USACE, 1992</ref> “Common to all uncontrolled spillways that are not integral with a concret...")
  • 17:31, 7 September 2022 Rmanwaring talk contribs created page Controlled Spillways (Created page with "__NOTOC__ ---- <!-- Delete any sections that are not necessary to your topic. Add pictures/sections as needed --> “A controlled crest is one that includes gates which are used to control the flow; the uncontrolled crest is one unencumbered by gates” (EM 1110-2-1603 Hydraulic Design of Spillways, USACE, 1992). “Controlled spillways include crest gates that serve as a movable damming surface allowing the spillway crest to be located below the normal operating level...")
  • 17:20, 7 September 2022 Rmanwaring talk contribs created page Energy Dissipation (Created page with "__NOTOC__ ---- <!-- Delete any sections that are not necessary to your topic. Add pictures/sections as needed --> “Terminal structures located immediately downstream of the conveyance feature include stilling basins, energy dissipaters, and flip buckets. These structures are intended to dissipate or manage the kinetic energy of the flow, so it can be returned to the river or stream without significant scour or erosion that could damage or fail the dam and appurtenant s...")
  • 17:15, 7 September 2022 Rmanwaring talk contribs created page Spillway Conveyance (Created page with "__NOTOC__ ---- <!-- Delete any sections that are not necessary to your topic. Add pictures/sections as needed --> “Conveyance features located immediately upstream and downstream of a control structure include approach channels, inlet structures, chutes, conduits, and/or tunnels. These conveyance features pass flow from the reservoir to the control structure, as well as pass flow from the control structure to the terminal structure. The conveyance feature (such as an a...")
  • 17:11, 7 September 2022 Rmanwaring talk contribs created page Control Section (Created page with "__NOTOC__ ---- <!-- Delete any sections that are not necessary to your topic. Add pictures/sections as needed --> “A major component of a spillway is the control device, which regulates the outflows from the reservoir. A control device limits or prevents outflows below fixed reservoir levels and regulates releases when the reservoir rises above that level. A control structure may consist of a sill, weir, orifice, or pipe. The discharge-head relationship may be fixed, a...")
  • 16:08, 7 September 2022 Rmanwaring talk contribs created page Spillway Approach (Created page with "__NOTOC__ ---- <!-- Delete any sections that are not necessary to your topic. Add pictures/sections as needed --> “Spillway approach configurations will influence the abutment contraction coefficient, the nappe profile, and possibly the flow characteristics throughout the spillway chute and stilling basin. There are three general configurations for the spillway approach, each of which requires a different treatment at the abutments in order to provide acceptable spillw...")
  • 15:58, 7 September 2022 Rmanwaring talk contribs created page Spillways (Created page with "__NOTOC__ ---- <!-- Delete any sections that are not necessary to your topic. Add pictures/sections as needed --> “The basic purpose of the spillway is to provide a means of controlling the flow and providing conveyance from reservoir to tailwater for all flood discharges up to the spillway design flood (SDF). The spillway can be used to provide flood=control regulation for floods either in combination with flood-control sluices or outlet works, or in some cases, as th...")
  • 15:42, 7 September 2022 Rmanwaring talk contribs created page O&M of Gates/Bulkheads (Created page with "__NOTOC__ ---- <!-- Delete any sections that are not necessary to your topic. Add pictures/sections as needed --> “Steel-on-steel bearings require lubrication at regular intervals. Lubricants that contain rust-inhibiting compounds are desirable. Lubrication should be considered for some maintenance-free bearings because friction is reduced, the lubrication acts as a seal to prevent dirt from entering the bearing, and corrosion protection is increased. Certain types of...")
  • 15:40, 7 September 2022 Rmanwaring talk contribs created page Design and Construction of Gates/Bulkheads (Created page with "__NOTOC__ ---- <!-- Delete any sections that are not necessary to your topic. Add pictures/sections as needed --> ==Bulkheads== “A bulkhead or stoplog and guides should be provided at the entrance to each water passage for dewatering the service and emergency gates for maintenance except when they are excessively costly or clearly unfeasible and other means can be improvised. When emergency gates are not required, stoplog or bulkhead guides for maintenance should alway...")
  • 15:35, 7 September 2022 Rmanwaring talk contribs created page Gates/Bulkheads (Created page with "__NOTOC__ ---- <!-- Delete any sections that are not necessary to your topic. Add pictures/sections as needed --> To learn more about gates and bulkheads, click the following links: ==Components of Gates/Bulkheads== While there are many different types and sizes of gates and bulkheads, they often share similar components. These can include gate slots, gate recesses, gate seats, passageway liners, and air vents. Additionally, it is often required to design and construct...")
  • 23:11, 6 September 2022 Rmanwaring talk contribs created page Decommissioning of Outlet Works (Created page with "__NOTOC__ ---- <!-- Delete any sections that are not necessary to your topic. Add pictures/sections as needed --> “When the existing conduit deteriorates to a point where it can no longer serve its intended design purpose, a decision must be made to renovate, remove/replace, or to abandon it. In some cases, the designer may find it technically and economically more feasible to abandon the conduit by grouting it closed and leaving it in place. For instance, abandonment...")
  • 21:48, 6 September 2022 Rmanwaring talk contribs created page O&M of Outlet Works (Created page with "__NOTOC__ ---- <!-- Delete any sections that are not necessary to your topic. Add pictures/sections as needed --> The necessity to perform controlled releases of stored water for water supply and regulation, recreation, flood risk management, irrigation, navigation, and environmental purposes via the outlet works makes its operation and maintenance one of the most important topics in dam safety. “Spillways and outlet works are necessary to provide capability to release...")
  • 21:39, 6 September 2022 Rmanwaring talk contribs created page Design and Construction of Outlet Works (Created page with "__NOTOC__ ---- <!-- Delete any sections that are not necessary to your topic. Add pictures/sections as needed --> ==Outlet Works Sizing and Capacity== “The sizing of the outlet works should take into account the possibility of using it to reduce the size or frequency of spillway discharges. The necessity of emergency drawdown capability and low flow discharge capability should be considered during the outlet works planning phase. The selection of type and arrangement o...")
  • 21:25, 6 September 2022 Rmanwaring talk contribs created page Outlet Works (Created page with "__NOTOC__ ---- <!-- Delete any sections that are not necessary to your topic. Add pictures/sections as needed --> “An outlet works is a combination of structures and equipment required for the safe operation and control of water released from a reservoir to serve various purposes (i.e., regulating stream flow and quality; releasing floodwater, providing irrigation, municipal, and/or industrial water)”.<ref name="FEMA Outlet Works">Technical Manual: Outlet Works Ene...")
  • 21:14, 6 September 2022 Rmanwaring talk contribs created page Water Conveyance (Created page with "__NOTOC__ ---- <!-- Delete any sections that are not necessary to your topic. Add pictures/sections as needed --> Water conveyance is an important and essential design component of a dam for a variety of reasons including: the consumption of water resources, the controlled release of attenuated flood surges during large precipitation events, regular environmental releases for maintaining riverine ecosystem health, hydropower generation, or emergency drawdown of the reser...")
  • 20:40, 6 September 2022 Rmanwaring talk contribs created page Design and Construction of Arch Dams (Created page with "__NOTOC__ ---- <!-- Delete any sections that are not necessary to your topic. Add pictures/sections as needed --> “Unlike a concrete gravity dam which carries the entire load by its self weight, an arch dam obtains its stability by both the self weight and, to a great extent, by transmitting the imposed loads by arch action into the valley walls. The geometry of the dam site is, therefore, the most basic consideration in the selection of an arch dam. As a general rule,...")
  • 20:34, 6 September 2022 Rmanwaring talk contribs created page Design and Construction of Gravity Dams (Created page with "__NOTOC__ ---- <!-- Delete any sections that are not necessary to your topic. Add pictures/sections as needed --> “Basically, gravity dams are solid concrete structures that maintain their stability against design loads from the geometric shape and the mass and strength of the concrete. Generally, they are constructed on a straight axis, but may be slightly curved or angled to accommodate the specific site conditions. Gravity dams typically consist of a nonoverflow sec...")
  • 20:27, 6 September 2022 Rmanwaring talk contribs created page Decommissioning (Created page with "__NOTOC__ ---- <!-- Delete any sections that are not necessary to your topic. Add pictures/sections as needed --> Dam owners and project stakeholders continually weigh the maintenance costs associated with safely operating a dam against its useful benefits. Negative effects of aging dams can include the risk of a dam failure, an accumulation of river sediment and loss of useful reservoir storage, the continued prevention of fish passage, the continued alteration of downs...")
  • 20:22, 6 September 2022 Rmanwaring talk contribs created page Hydrologic Surveillance & Monitoring (Created page with "__NOTOC__ ---- <!-- Delete any sections that are not necessary to your topic. Add pictures/sections as needed --> Page Summary ==Other Headings== Info ==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. Citations...")
  • 20:21, 6 September 2022 Rmanwaring talk contribs created page Settlement (Created page with "__NOTOC__ ---- <!-- Delete any sections that are not necessary to your topic. Add pictures/sections as needed --> Page Summary ==Other Headings== Info ==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. Citations...")
  • 20:14, 6 September 2022 Rmanwaring talk contribs created page Seepage Surveillance & Monitoring (Created page with "__NOTOC__ ---- <!-- Delete any sections that are not necessary to your topic. Add pictures/sections as needed --> Nearly every dam experiences seepage to varying degrees. Depending on the type of dam and its unique site conditions, seepage may go through, underneath, or around the dam. When left unchecked, excessive seepage can lead to problems such as internal erosion and eventual failure of either the dam itself or other vital components of the dam. According to the As...")
  • 20:05, 6 September 2022 Rmanwaring talk contribs created page Inspections (Created page with "__NOTOC__ ---- <!-- Delete any sections that are not necessary to your topic. Add pictures/sections as needed --> As with any other structure, dams require regular inspections to identify and prevent any damage or deterioration of its many components. The regularity with which a dam may require inspection depends on the jurisdiction of any regulatory agencies as well as the hazard potential classification of the dam. Inspections can range from those required by dam saf...")
  • 19:09, 6 September 2022 Rmanwaring talk contribs moved page Dams National Engineering Handbook: Chapter 45 - Filter Diaphragms to Dams National Engineering Handbook: Chapter 45- Filter Diaphragms over redirect
  • 19:09, 6 September 2022 Rmanwaring talk contribs deleted redirect Dams National Engineering Handbook: Chapter 45- Filter Diaphragms by overwriting (Deleted to make way for move from "Dams National Engineering Handbook: Chapter 45 - Filter Diaphragms")
  • 19:08, 6 September 2022 Rmanwaring talk contribs moved page Dams National Engineering Handbook: Chapter 45- Filter Diaphragms to Dams National Engineering Handbook: Chapter 45 - Filter Diaphragms
  • 15:26, 2 September 2022 Rmanwaring talk contribs created page Foundation Evaluation (Created page with "__NOTOC__ ---- <!-- Delete any sections that are not necessary to your topic. Add pictures/sections as needed --> According to the Association of State Dam Safety Officials (ASDSO), the five most likely causes of dam failures are: overtopping, foundation defects, cracking, inadequate maintenance and upkeep, and piping. In order to prevent a dam failure, a properly designed foundation is essential. “The earth embankment and its foundation must be stable and withstand...")
  • 23:28, 1 September 2022 Rmanwaring talk contribs created page Geotechnical Exploration (Created page with "__NOTOC__ ---- <!-- Delete any sections that are not necessary to your topic. Add pictures/sections as needed --> Before any construction or design work can be completed at a potential dam site, conducting geotechnical subsurface and onsite material exploration is essential. These explorations consist of both invasive and non-invasive sampling methods. Invasive geotechnical sampling methods may include drilling boreholes and taking core samples from the overburden and be...")
  • 20:20, 6 June 2022 Rmanwaring talk contribs created page Earthen/Rockfill Dams (Created page with "__NOTOC__ Earthen/Rockfill Dams, also referred to as Embankment Dams, are constructed using layers of compacted soil. These types of dams are often constructed using layers of soil with varying levels of hydraulic conductivities in order to prevent excessive seepage through the embankment. These types of dams are subject to cracking from seismic or consolidation and subsequent internal erosion due to seepage, which is prevented by using engineered filters and monitored...")
  • 19:40, 6 June 2022 Rmanwaring talk contribs created page Types of Dams (Created page with "__NOTOC__ Dams serve a variety purposes including water storage, flood protection, power generation, tailings storage, or recreation. The design of a dam is heavily influenced by its intended purpose; however, the purpose of a dam can change over the course of its design life due to changes in the surrounding community or in site conditions. No matter the purpose of a dam, safety to the public is the number one priority over any potential benefits. ---- File:2014_NY...")
  • 19:34, 6 June 2022 Rmanwaring talk contribs uploaded a new version of File:2014 NY-AshokanDam.jpg
  • 19:30, 6 June 2022 Rmanwaring talk contribs created page File:2014 NY-AshokanDam.jpg
  • 19:30, 6 June 2022 Rmanwaring talk contribs uploaded File:2014 NY-AshokanDam.jpg
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