Spillways Articles
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Automatic Flow Control Valves Solve Raw Water Management Challenges
For all the historical and natural charm of Greenville, S.C., efforts to serve the city's water customers were hampered by raw water management challenges at a nearby reservoir. A new automatic flow control valve provided Greenville Water, City of Greenville Commission of Public Works, with a customized solution. Greenville is situated about halfway between Charlotte, N.C., and Atlanta, up ...
By Cla-Val
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Dam Structure Safety Installation and Repair Using Advanced Geosynthetic Technology
Dams and Spillways Are a Critical Part of U.S. Infrastructure With estimates of 84,000 structures nationwide, dams and spillways are essential for controlling flooding, water distribution and management, and providing hydroelectric power. Unfortunately, these structures cannot last forever. The average age of dams and spillways in the US is 57 years, seven years over the typical 50-year lifespan ...
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GEOWEB Geocells Combined with a Turf Reinforcement Mat (TRM)
GEOWEB System - Research Synopsis Research Objective Measure performance of the GEOWEB (GW) material combined with a turf reinforcement mat (TRM) (integrated system) with topsoil infill and vegetation under varying shear stresses and flow rates to quantify both hydraulic forces and corresponding soil loss. The test consisted of a series of continuous one-hour flows over the GW-TRM system at ...
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Bathymetry Survey During Construction - Case Study
Objective During the construction of the Péribonka hydropower plant, a bathymetric survey was conducted using the Maski inspection class ROV after the blasting of the spillway to ensure that all the debris were recovered. The ROV was also utilized to map and geo-reference the submerged area for future inspection ...
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El Guapo Dam (Venezuela, 1999) - Case Study
Construction of El Guapo Dam began in 1975 and was completed in 1980. The dam is 197 feet tall and stores 114,000 acre-feet of drinking and irrigation water for the Barlovento Region in the state of Miranda, Venezuela. Because bedrock is deep (approximately 65 feet below the original ground surface), the embankment was built on a sandy gravel soil foundation. An elastoplastic cutoff wall extends ...
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Testalinden Dam (British Columbia, 2010) - Case Study
Dam Construction and History Testalinden Dam was constructed in the 1930s at the headwaters of Testalinden Creek at 1,810 m elevation near the summit of Mount Kobau, approximately 1,500 m above the Okanagan River valley below (see figures). The 2.5 m high dam was constructed from silty-sand and glacial till using horses and a Fresno scraper. There was no engineering design or supervision during ...
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Spencer Dam (Nebraska, 2019) - Case Study
Spencer Dam was a dam constructed for hydropower in 1927 on the Niobrara River in northern Nebraska. The dam consisted of a 3,200-foot-long embankment section and a 500-foot-long powerhouse/spillway section. The dam’s maximum height was 26 feet. The spillway consisted of four 33.5-foot-wide bays controlled by Tainter gates, one 10-foot-wide trash/ice bay with a Tainter gate, and five ...
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Denver, CO - Case Study
Location: Denver, CO Cofferdam Sizes: 8′ high x 100′ long Water Depth: 5.5′ Installation Time: 4.5 hours per dam Project Description: Dam-It Dams cofferdams were used to create a dry work site for the contractor to install a new spillway. Spanning a river above or below water often requires a dry work environment. The length of the span, ...
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Shon Sheffrey Dam Willowstick Survey - Case Study
Atkins used Willowstick to design targeted grouting and successfully stop leakage through earth embankment dam Atkins was commissioned by Welsh Water to reduce leakage at earth dam nicknamed “the sieve”. Client admitted they would need to come up with a new name after Atkins successfully located and stopped all leakage pathways with a Willowstick assisted grouting programme. ...
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Successful installation and operation of Chacabuquito`s Sediment Removal Equipment, Chile - Case Study
This year SediCon provided the first Sediment Removal Equipment operated from a travel crane for Chacabuquito Hydropower plant. Chacabuquito is a Chilean run of river hydropower plant located in Los Andes, V Region, Valparaiso, which uses discharge from Los Quilos Hydropower Plant (Colorado and Aconcagua rivers). Chacabuquito began operations on 2002 and it has an installed capacity of 25.7 MW ...
By SediCon AS
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Establishment and application of three-dimensional realistic river terrain in the numerical modeling of flow over spillways
We present an integrated three-dimensional (3D) spillway model where the realistic and complicated river terrain is implemented by the platform CATIA (Computer Aided Three Dimensional Interactive Application). This integrated 3D spillway model allows for complicated topographic and geomorphic conditions and describes the spatial distribution of the spillway dam (upstream reservoir, downstream ...
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Rock Island adult fishway extension - Case Study
Rock Island Dam is located on the Columbia River, approximately 15 miles south of Wenatchee, WA. The development of a crack in a spillway of Wanapum Dam, downstream of Rock Island Dam necessitated a 25 foot drawdown of the tailrace. This created a significant obstacle for the fish migrating upstream; they would not have access to the original fish ladder. With the arrival of the migrating ...
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Enviroflex®: One Product – Many Applications
Enviroflex® is a fiber reinforced articulated concrete block for erosion control and scour protection. Following Soil Retention’s philosophy of performance of product and overall system instead of pure ease of manufacturing, Enviroflex® is cast as a tapered and vertically interlocking block (hard to make but very effective). Some flood control designers and major dam hydraulic ...
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Case study - Reservoir Aabach Germany - Continuous monitoring of contact pressure
With a total volume of approximately 20 million cubic meters of water and a length of 450 meters, the reservoir supplies drinking water for 200.000 people in the area and fulfils also an important function in the flood protection there. With the new monitoring solution it was possible to reduce the workload and cost for collecting, reading out and transmitting of data significantly. An ...
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Modeling scour depth downstream of grade-control structures using data driven and empirical approaches
Local scour occurs in the immediate vicinity of structures as a result of impinging on a bed with a high velocity flow. Prediction of scour depth has an important role in control structure management and water resource engineering issues, so a study of new heuristic expressions governing it is necessary. The present study aims to investigate different methods' capabilities to estimate scour ...
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Amistad Dam: Identifying Critical Leaks in the Amistad Dam - Case Study
Why was the Amistad dam emptying—and what could be done to solve the problem? In 1996, the Comision Federal de Electricidad (CFE), the national electric company of Mexico responsible for the Mexican half of the Amistad Dam, contacted AGI. The CFE heard about the capabilities of our instruments to look into the ground, and they were anxious to see if our tools could help them ...
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How better weather forecasting can help stretch water supplies
Reservoir managers look to storm predictions to make smarter choices about dam operations Last year, New York City faced an unusual situation. An epic winter in the city’s Delaware River watershed brought heavy snow and very little rain. Stubborn cold meant there was no snowmelt to refill water-supply reservoirs, even as the city’s 9.5 million residents were draining them dry. A ...
By Ensia
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Case study - One-pass-trencher used to repair Tyler Dam
Greg DeWind takes pride in his one-pass trenching machine. With a smile on his face, he watches Wednesday as it is used to dig a trench at the Lake Tyler Dam. The 225,000-pound, 3,000-horsepower machine mixes soil, cement and bentonite clay as it cuts a trench that is 2 1/2-foot wide and about 70 feet deep, according to Steve Richards, with ETTL Engineers and Consultants. It burns about 100 ...
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Experimental study on improvement effect of guide wall to water flow in bend of spillway chute
In order to improve water flow in a bend of a spillway chute using a guide wall, modeling experiments with or without a guide wall under conditions of three different bend axial radii, three chute bottom slopes and three flow rates were carried out in this study. Two indexes were calculated, which are the improved water surface uniformity and the reduced rate of water surface difference in ...
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Meshless particle modelling of free surface flow over spillways
A meshless Lagrangian (particle) method based on the weakly compressible moving particle semi-implicit formulation (WC-MPS) is developed and analysed for simulation of flow over spillways. To improve the accuracy of the model for pressure and velocity calculation, some modifications are proposed and evaluated for the inflow and wall boundary conditions implementation methods. The final model ...
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