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  Encyclopedia of Keywords > Matter > Liquids > Water > Rivers > Dam   Michael Charnine

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  1. The dam is a major tourist attraction.
  2. A dam is a barrier across flowing water that obstructs, directs or slows down the flow, often creating a reservoir, lake or impoundments.
  3. A dam is a barrier built across a stream or river to stop or check the flow of water.
  4. A dam is a barrier built across a water course to hold back or control water flow.
  5. A dam is a barrier built across a stream or river to stop or check the flow of water and can serve many purposes.

Arch Dam

  1. The most desirable place for an arch dam is a narrow canyon with steep side walls composed of sound rock.
  2. In the arch dam stability is obtained by a combination of arch and gravity action.
  3. An arch dam is most appropriate for construction in a high, narrow gorge where the arch of the structural shape provides strength.


  1. Where suitable rock is at hand, a minimum of transportation of materials can be realized with this type of dam.
  2. Soil and soft or highly fractured rock are excavated, sorted by type, and stockpiled for later use in dam construction.

Ice Dams

  1. Remove all kids at one time and the dam's udder is going to be uncomfortably tight by the next day.
  2. The Immediate Location The Customs House is located within the conservation area of Mill Dam in the town of South Shields.
  3. All technical aspects of Austin Dam were poor.
  4. Check dam sites be selected based upon the criteria of need rather than compulsion.
  5. The unusually high heat loss on this roof has caused both an ice dam and icicles.


  1. A dry dam is a dam designed to control flooding.
  2. A weir is a type of small overflow dam that can be used for flow measurement.
  3. To control floods, flooding waters can be slowly released through dam floodgates.


  1. For this type of dam, impervious foundations with high bearing strength are essential.
  2. In the instances where clay is utilized as the impervious material the dam is referred to as a composite dam.
  3. The most economical arrangement is often a composite structure such as a masonry dam flanked by earth embankments.
  4. Grand Coulee Dam, one of the largest concrete structures in the world, is an awesome sight.
  5. Despite this, the dam's structure was largely undamaged --- the top metre or so of masonry was washed away, but the basic structure remained intact.


  1. Rolled-earth dams may also employ a watertight facing or core in the manner of a rock-fill dam.
  2. Two types of single-arch dams are in use, namely the constant-angle and the constant-radius dam.
  3. The multiple-arch dam consists of a number of single-arch dams with concrete buttresses as the supporting abutments.
  4. Parker Dam is a constant-angle arch dam.
  5. An outdated method of zoned earth dam construction utilized a hydraulic fill to produce a watertight core.


  1. An auxiliary dam is constructed in a low spot or saddle through which the reservoir would otherwise escape.
  2. Conversely, a wing dam is a structure that only partly restricts a waterway, creating a faster channel that resists the accumulation of sediment.
  3. They can be placed between lifts as the dam is raised to strength weak materials.
  4. If the entire dam cannot be built in one construction season, the dam is usually designed in phases or stages.
  5. The Kallanai is a massive dam of unhewn stone, over 300 meters long, 4.5 meters high and 20 meters (60 feet) wide,[5] across the main stream of the Cauvery.

Fill Dam

  1. They can be used to line the upstream face of a fill dam or even to line the entire reservoir.
  2. Construction of the fill dam proceeds layer by layer and zone by zone until the height of each zone and, eventually, the crest of the dam are reached.
  3. The most famous earth fill dam recently constructed is the Aswan High Dam that was built across the Nile River in Egypt in 1970-1980.


  1. Dam failures are generally catastrophic if the structure is breached or significantly damaged.
  2. The multiple-arch dam does not require as many buttresses as the hollow gravity type, but requires good rock foundation because the buttress loads are heavy.
  3. The heavy crib structure supported the dam's face and the weight of the water.
  4. The upstream (water) face of the dam is sometimes protected with a concrete slab or an asphalt face.


  1. A third embankment dam type is built with asphalt concrete core.
  2. Arch dams, like the El Atazar Dam in Spain, are thin and require less material than any other type of dam.
  3. A homogeneous rolled-earth dam is entirely constructed of one type of material but may contain a drain layer to collect seep water.
  4. When building an earthen dam, engineers use soils that do not let water seep through.


  1. A check dam is a small dam designed to reduce flow velocity and control soil erosion.
  2. CONTROL DAM -A dam or structure with gates to control the discharge from the upstream reservoir or lake.


  1. Like all dam engineers, you must weigh the pros and cons before you make your final decisions.
  2. Cofferdams A cofferdam during the construction of locks at the Montgomery Point Lock and Dam.
  3. The draw span is across the upstream end of the Louisville and Portland Canal, which includes the McAlpine Locks and Dam.


  1. Itaipú Dam, the world's largest hydroelectric power plant, is a triumph of giant-scale engineering.
  2. The condition of the dam is monitored throughout its lifetime, as required by federal, state, and local laws and by standards of engineering practice.
  3. The arch dam is one of the most elegant of civil engineering structures.


  1. This compact cleared the way for federal legislation for the construction of Hoover Dam.
  2. No permission is yet granted from the Monuments Council of the region for the construction of the dam.


  1. Primarily due to environmental concerns, design and construction of any dam in the future will be a much-studied and controversial process.
  2. Critics claim that the dams, such as the Glen Canyon Dam, were built without taking into consideration their social, environmental and economic benefits.


  1. The timber dam is rarely used by humans because of its short lifespan and the limitation in height to which it can be built.
  2. Limited technology kept their height down: a fifth-century Sri Lankan dam, 34 m high, was the world's highest for a millennium.

Water Pressure

  1. A spillway is a section of a dam designed to pass water from the upstream side of a dam to the downstream side.
  2. This is the case if the resultant force of water pressure and weight falls within the base of the dam.
  3. How much the water pushes on the dam is called water pressure.
  4. The power and water system begins northwest of the mill at a concrete dam which runs 250 feet across Haw River.
  5. The dam is huge: 710 feet high, 1,560 feet wide and storing 27 million acre-feet of water in Lake Powell, which extends back up the river for 186 miles.


  1. A zoned-earth dam has distinct parts or zones of dissimilar material, typically a locally plentiful shell with a watertight clay core.
  2. Quite naturally, early dam builders began by using plentiful materials like sand, timber and brush, and gravel.
  3. At one location, the sanctuary roofline was bent downward, perhaps damaged due to the weight of repetitive ice dam formation.


  1. Jones Falls Dam, in Canada, is a constant radius dam.
  2. According to the International Commission on Large Dams (ICOLD), a large dam is 15 m or more high (from the foundation).
  3. Large earthmovers haul the specific type of soil needed to raise the zone of the dam they are working on.
  4. Throughout the compaction process, inspectors approve the soil that is hauled on site and hauled to the particular zone of the dam.


  1. The primary function of the dam's structure is to fill the gap in the natural reservoir line left by the stream channel.
  2. A diversionary dam is a structure designed to divert all or a portion of the flow of a river from its natural course.


  1. Rock can be placed at steeper angles than soil, and it weighs more; so a dam built mostly of rock can be smaller in design section.
  2. One of the first dams built was the Dujiangyan dam on a tributary of the Yangtze, in China's province of Sichuan.


  1. A trench that is the full width of the dam (across the channel) is cut into firm rock.
  2. They fill this trench with dam material to form a cutoff trench.


  1. The dam also serves to divert water to the intake works.
  2. The purpose of the dam was to divert the waters of the Cauvery across the fertile Delta region for irrigation via canals.
  3. CONTROL STRUCTURE (LAKE LEVEL) -Dam, dike, pump or any structure built for the purpose of controlling the water level of a lake or pond.


  1. The best place for building a dam is a narrow part of a deep river valley; the valley sides can then act as natural walls.
  2. Some Dutch cities are named after dams; Amsterdam (dam on the Amstel) and Rotterdam (dam on the Rotte).
  3. The central square of Amsterdam, believed to be the original place of the 800 year old dam, still carries the name Dam Square.

United States

  1. Wildhorse Dam near Mountain City, Nevada in the United States is an example of the type.
  2. In the United States, dam-building decisions are becoming increasingly public.
  3. Embankment dams are the most common type of dam in the United States.


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  Originally created: September 16, 2007.
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