ASDSO Dam Safety Toolbox

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7 September 2022

  • 23:0123:01, 7 September 2022 diff hist +595 N Design and Construction of Principal SpillwaysCreated 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..."
  • 23:0023:00, 7 September 2022 diff hist +5 SeismicNo edit summary
  • 22:5722:57, 7 September 2022 diff hist +1,582 N Principal SpillwaysCreated 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..."
  • 22:4522:45, 7 September 2022 diff hist +22,059 N Uncontrolled SpillwaysCreated 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..."
  • 22:2122:21, 7 September 2022 diff hist +39 Design and Construction of Gravity DamsNo edit summary
  • 22:1722:17, 7 September 2022 diff hist +329 Outlet WorksNo edit summary
  • 22:1522:15, 7 September 2022 diff hist +63 Gates/BulkheadsNo edit summary
  • 22:1422:14, 7 September 2022 diff hist +140 Design and Construction of Gates/BulkheadsNo edit summary
  • 22:1222:12, 7 September 2022 diff hist +53 O&M of Gates/BulkheadsNo edit summary
  • 18:3018:30, 7 September 2022 diff hist +159 Energy DissipationNo edit summary
  • 17:3617:36, 7 September 2022 diff hist +9 Controlled SpillwaysNo edit summary
  • 17:3217:32, 7 September 2022 diff hist +161 Controlled SpillwaysNo edit summary
  • 17:3017:30, 7 September 2022 diff hist +10,190 N Controlled SpillwaysCreated 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..."
  • 17:2017:20, 7 September 2022 diff hist −3,982 SpillwaysNo edit summary
  • 17:1917:19, 7 September 2022 diff hist +5,891 N Energy DissipationCreated 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..."
  • 15:5815:58, 7 September 2022 diff hist +6,727 N SpillwaysCreated 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..."
  • 15:4215:42, 7 September 2022 diff hist +1,193 N O&M of Gates/BulkheadsCreated 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..."
  • 15:4015:40, 7 September 2022 diff hist +3,425 N Design and Construction of Gates/BulkheadsCreated 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..."
  • 15:3515:35, 7 September 2022 diff hist +6,370 N Gates/BulkheadsCreated 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..."

6 September 2022

  • 23:1123:11, 6 September 2022 diff hist +2,802 N Decommissioning of Outlet WorksCreated 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..."
  • 21:4921:49, 6 September 2022 diff hist +4 O&M of Outlet WorksNo edit summary
  • 21:4821:48, 6 September 2022 diff hist +5,063 N O&M of Outlet WorksCreated 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..."
  • 21:3921:39, 6 September 2022 diff hist +8,972 N Design and Construction of Outlet WorksCreated 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..."
  • 21:2621:26, 6 September 2022 diff hist −206 Outlet WorksNo edit summary
  • 21:2521:25, 6 September 2022 diff hist +6,068 N Outlet WorksCreated 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..."
  • 21:1421:14, 6 September 2022 diff hist +1,234 N Water ConveyanceCreated 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..."
  • 20:4820:48, 6 September 2022 diff hist −4 Anatomy of DamsNo edit summary
  • 20:4720:47, 6 September 2022 diff hist +30 Low Head DamsNo edit summary
  • 20:4520:45, 6 September 2022 diff hist +619 Tailings DamsNo edit summary
  • 20:4320:43, 6 September 2022 diff hist +25 Rubber DamsNo edit summary
  • 20:4220:42, 6 September 2022 diff hist 0 Timber DamsNo edit summary
  • 20:4120:41, 6 September 2022 diff hist +1,062 Composite DamsNo edit summary
  • 20:4020:40, 6 September 2022 diff hist +1,236 N Design and Construction of Arch DamsCreated 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,..."
  • 20:3620:36, 6 September 2022 diff hist −10 Design and Construction of Gravity DamsNo edit summary
  • 20:3420:34, 6 September 2022 diff hist +3,119 N Design and Construction of Gravity DamsCreated 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..."
  • 20:2720:27, 6 September 2022 diff hist +3,872 N DecommissioningCreated 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..."
  • 20:2120:21, 6 September 2022 diff hist +579 N Hydrologic Surveillance & MonitoringCreated 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..."
  • 20:2120:21, 6 September 2022 diff hist +579 N SettlementCreated 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..."
  • 20:1420:14, 6 September 2022 diff hist +3,362 N Seepage Surveillance & MonitoringCreated 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..."
  • 20:1020:10, 6 September 2022 diff hist +72 Foundation EvaluationNo edit summary
  • 20:0920:09, 6 September 2022 diff hist +1 Seepage Analysis & Filter/Drain DesignNo edit summary
  • 20:0820:08, 6 September 2022 diff hist −3 Design and Construction of Embankment DamsNo edit summary
  • 20:0520:05, 6 September 2022 diff hist +2,754 N Inspections of Embankment DamsCreated 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..."
  • 19:5819:58, 6 September 2022 diff hist +2,184 Slope StabilityNo edit summary
  • 19:5419:54, 6 September 2022 diff hist +85 Controlling Animal ActivityNo edit summary
  • 19:5319:53, 6 September 2022 diff hist +84 Vegetation ManagementNo edit summary
  • 19:5119:51, 6 September 2022 diff hist +170 Inflow Design FloodNo edit summary
  • 19:4119:41, 6 September 2022 diff hist +25 Borrow InvestigationNo edit summary
  • 19:3619:36, 6 September 2022 diff hist +489 Slope StabilityRemoved redirect to Slope Stability (EM 1110-2-1902) Tag: Removed redirect
  • 19:3519:35, 6 September 2022 diff hist +102 Geotechnical ExplorationNo edit summary
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