User contributions for Grichards
16 December 2022
- 15:5815:58, 16 December 2022 diff hist −11 Owner No edit summary
- 15:5715:57, 16 December 2022 diff hist +1,143 Owner No edit summary
- 15:4515:45, 16 December 2022 diff hist −20 Construction No edit summary
- 15:4315:43, 16 December 2022 diff hist −194 Construction No edit summary
- 15:3115:31, 16 December 2022 diff hist +7 Specifications No edit summary
- 15:3015:30, 16 December 2022 diff hist +2,303 N Specifications Created page with "__NOTOC__ Category:Home ---- {{Picture <!-- Add image file name (ex.image.jpg) --> |image=const1.jpg <!--Add link if applicable --> |link= <!-- Add picture caption --> |caption=Construction of an embankment dam. }} <!-- Delete any sections that are not necessary to your topic. Add pictures/sections as needed --> "Some of the potential problems that could occur during construction can be reduced by clear, concise specifications and clear, concise instructions to cont..."
- 15:3015:30, 16 December 2022 diff hist +20 Engineering No edit summary
15 December 2022
- 22:5122:51, 15 December 2022 diff hist +14 Regulator No edit summary
- 22:4722:47, 15 December 2022 diff hist −8 Regulator No edit summary
- 22:4622:46, 15 December 2022 diff hist −301 Regulator No edit summary
- 22:4122:41, 15 December 2022 diff hist −4 Engineer/Construction Manager No edit summary
- 22:4022:40, 15 December 2022 diff hist −330 Engineer/Construction Manager No edit summary
- 22:3622:36, 15 December 2022 diff hist +450 Contractor No edit summary
- 22:3322:33, 15 December 2022 diff hist +24 Regulator No edit summary
- 22:3222:32, 15 December 2022 diff hist +48 Engineer/Construction Manager No edit summary
- 22:3222:32, 15 December 2022 diff hist +48 Contractor No edit summary
- 22:3122:31, 15 December 2022 diff hist +48 First Filling and Monitoring No edit summary
- 22:3022:30, 15 December 2022 diff hist +48 Permitting No edit summary
- 22:3022:30, 15 December 2022 diff hist +24 New Dams No edit summary
- 22:2922:29, 15 December 2022 diff hist +24 Rehabilitation No edit summary
- 22:2922:29, 15 December 2022 diff hist −4 Legal Responsibilities (Public Safety) No edit summary
- 22:2822:28, 15 December 2022 diff hist +24 Dam Safety Programs No edit summary
- 22:2422:24, 15 December 2022 diff hist +398 Contractor No edit summary
- 22:1822:18, 15 December 2022 diff hist +1,615 N Support of Excavation Created page with "<!-- Delete any sections that are not necessary to your topic. Add pictures/sections as needed --> __NOTOC__ Category:Construction ---- {{Picture <!-- Add image file name (ex.image.jpg) --> |image=SOE.png <!--Add link if applicable --> |link= <!-- Add picture caption --> |caption=Temporary Shoring Wall }} Construction of deep excavations must be made prior to a modification to the existing structure or new structure can be built. When excavations have the potential t..."
- 22:1822:18, 15 December 2022 diff hist 0 N File:SOE.png No edit summary current
- 22:1622:16, 15 December 2022 diff hist +60 Construction No edit summary
- 00:0600:06, 15 December 2022 diff hist +18 Seismic No edit summary
- 00:0200:02, 15 December 2022 diff hist +821 N Reservoir-triggered Seismicity Created page with "__NOTOC__ Category: Seismic ---- If the proposed reservoir is substantial in volume or active faults cross near the reservoir area, then potential for reservoir-triggered seismicity (RTS) should be evaluated. RTS is the idea that the added weight of the reservoir or pore pressure distribution increases the frequency of earthquakes in areas of high seismic activity OR may cause earthquakes in areas thought to be seismically inactive. RTS has been observed in dams over..."
- 00:0100:01, 15 December 2022 diff hist +680 N Seiches Created page with "__NOTOC__ Category: Seismic ---- A seiche is a standing wave that forms in an enclosed body of water that has the potential to generate hazardous fluctuation in the reservoir level. Assessment of seiche hazard considers the oscillatory motions of water generated by strong ground shaking, and the probabilities of the events occurring. <!-- For information on notation for in text citations visit https://www.mediawiki.org/wiki/Help:Cite Or simply enclose the citation..." current
- 00:0100:01, 15 December 2022 diff hist +51 Seismic No edit summary
14 December 2022
- 23:5923:59, 14 December 2022 diff hist −3 Deterministic Seismic Analysis No edit summary current
- 23:5823:58, 14 December 2022 diff hist +1,356 N Deterministic Seismic Analysis Created page with "__NOTOC__ Category: Seismic ---- In the deterministic approach, individual earthquake scenarios (earthquake magnitude and location) are developed for each relevant seismic source and a specified ground motion probability level is selected (by tradition, it is either 0 or 1 standard deviation above the median). Based on the earthquake location, the distance to the site is computed. Given the magnitude, distance, and number of standard deviations for the ground motion,..."
- 23:5723:57, 14 December 2022 diff hist +940 N Probabilistic Seismic Analysis Created page with " __NOTOC__ Category: Seismic ---- In the probabilistic approach, all possible and relevant deterministic earthquake scenarios (all possible magnitude and location combinations) are considered as well as all possible ground motion probability levels (a range of the number of standard deviations above or below the median). For each earthquake scenario, the distance to the site is computed and then the ground motions are computed for each number of standard deviations a..." current
- 23:5523:55, 14 December 2022 diff hist +1,379 N Velocity Structure Created page with "__NOTOC__ Category: Geologic and Tectonic Setting ---- The velocity structure is a generalized model of the earth’s crust using layers having different assumed seismic velocities. It is important in a SHA to have a well-defined velocity structure. Several parameters (''V<sub>S30</sub>'', ''Z1.0'', ''Z2.5'') are used in most attenuation relationships. The most important parameter is ''V<sub>S30</sub>'', which is defined as the shear wave velocity in the top 30 m..."
- 23:5423:54, 14 December 2022 diff hist +2,034 N Local Tectonic Setting Created page with "__NOTOC__ Category: Geologic and Tectonic Setting ---- Clearly identifying and determining the activity level of faults within and adjacent to a project region is critical for development of the input parameters required to perform an SHA. An experienced seismologist should assess and summarize available literature to identify known seismic conditions in a region. The record of historical earthquakes should be evaluated to develop and verify recurrence parameters for..." current
- 23:5323:53, 14 December 2022 diff hist +930 N Local Geologic Setting Created page with "__NOTOC__ Category: Geologic and Tectonic Setting ---- An understanding of the rock units, stratigraphy, and geologic structure of a region, consistent with the global tectonic setting, needs to be developed to characterize the nature of the existing faults and potential seismic sources of a region. An experienced geologist should assess and summarize the known geologic and faulting conditions found in an available geologic literature, maps, and imagery. When geologi..." current
- 23:5323:53, 14 December 2022 diff hist +1,927 N Global Geologic Setting and Plate Tectonics Created page with "__NOTOC__ Category: Geologic and Tectonic Setting ---- A seismic hazard assessment should include an evaluation of the global geologic setting. Understanding the behavior and properties of the Earth's surface and underlying layers sets the stage for interpreting the local geologic setting. Global tectonics is the theory that the earth’s relatively low density crust (lithosphere) is composed of seven or eight major and several smaller rigid fragments. These te..." current
- 23:5223:52, 14 December 2022 diff hist −4,628 Geologic and Tectonic Setting No edit summary current
- 23:4823:48, 14 December 2022 diff hist −17 Seismic No edit summary
- 23:4623:46, 14 December 2022 diff hist +597 N Ground Motion Characterization Created page with "__NOTOC__ Category:Seismic ---- Normally ground motion prediction equations (GMPE) are selected from a published set of relationships. The relationships are selected based on one of the three main types of tectonic regimes: #Active Crustal #Subduction #Stable Continental <!-- 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 m..." current
- 23:4423:44, 14 December 2022 diff hist +40 Background Seismicity No edit summary
- 23:4323:43, 14 December 2022 diff hist +686 N Background Seismicity Created page with " __NOTOC__ Category:Seismic ---- Background zones and gridded seismicity are also types of areal sources. Background zones are used to model events that occur off of the known faults. Gridded seismicity uses a method of estimating activity rates and b-values by smoothing seismicity over a large region and assigning values to very small zones (or grids). <!-- For information on notation for in text citations visit https://www.mediawiki.org/wiki/Help:Cite Or simply..."
- 23:4223:42, 14 December 2022 diff hist −4 Linear vs. Non-linear No edit summary
- 23:4123:41, 14 December 2022 diff hist −4 Outlet Works No edit summary
- 23:4123:41, 14 December 2022 diff hist −4 Stilling Well Examples No edit summary current
- 23:4023:40, 14 December 2022 diff hist +1,470 Fault Sources No edit summary
- 23:3423:34, 14 December 2022 diff hist −53 Fault Sources No edit summary
- 23:3323:33, 14 December 2022 diff hist −110 Fault Sources No edit summary
- 23:3123:31, 14 December 2022 diff hist −2,547 Areal Sources No edit summary
- 23:2523:25, 14 December 2022 diff hist +318 Geologic and Tectonic Setting No edit summary