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Topic: Dam


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 dam. The Columbia Encyclopedia, Sixth Edition. 2001-05
Single-arch dams are curved upstream and are usually constructed in narrow canyons or gorges where the rocky side walls are strong enough to withstand the tremendous lateral thrust of the dam that is caused by the pressure of the water.
Dams may also be constructed with roller-compacted concrete, in which thin layers of concrete are compacted as if they were earth layers; this produces a far stronger dam, without the need for full forms.
The Oroville Dam, located in California, the tallest in the United States, is 770 ft (235 m) high; the Rogun Dam, in Russia, the tallest in the world, is 1,100 ft (335 m) high.
www.bartleby.com /65/da/dam.html   (520 words)

  
 Aswan Dam Encyclopedia Article @ LaunchBase.org (Launch Base)   (Site not responding. Last check: 2007-09-19)
When the dam almost overflowed in 1946 it was decided that rather than raise the dam a third time, a second dam would be built 6 km upriver (about 4 miles).
The Aswan High Dam is 3,600 m in length, 980 m wide at the base, 40 m wide at the crest and 111 m tall.
The dam has been implicated in a rise in cases of schistosomiasis (bilharzia), due to the thick plant life that has grown up in Lake Nasser, which hosts the snails who carry the disease.
www.launchbase.org /encyclopedia/Aswan_Dam   (1315 words)

  
 Dam - MSN Encarta
Dam, structure that blocks the flow of a river, stream, or other waterway.
The oldest known human-made dams were built more than 5,000 years ago in arid parts of the Middle East to divert river water to irrigate crops.
Hydroelectric dams harness the energy of water released from the reservoir to turn hydraulic turbines.
encarta.msn.com /encnet/refpages/RefArticle.aspx?refid=761561327   (750 words)

  
 Three Gorges Dam Encyclopedia Article @ 216.92.85.60 ()   (Site not responding. Last check: 2007-09-19)
Sun Yat-sen first proposed building a dam on the Yangtze River in 1919 for power generation purposes and the National Defense Planning Commission under the Kuomintang made the first survey of the proposed site in 1932, but the idea was shelved due to unfavorable political and economic conditions.
Probe International asserts that the dam does not address the real source of flooding, which is the loss of forest cover in the Yangtze watershed and the loss of 13,000 km² of lakes (which had greatly helped to alleviate floods) due to siltation, reclamation and uncontrolled development.
This was a contributing cause of the Banqiao Dam failure in 1975 that precipitated the failure of 61 other dams and resulted in over 200,000 deaths.
216.92.85.60 /encyclopedia/Three_Gorges_Dam   (3793 words)

  
 Kenneth W. Dam, Former Deputy Treasury Secretary, Joins Brookings
As deputy secretary, Dam played a key role in formulating and executing the Treasury Department's policies and programs, and was particularly involved in the Bush administration's efforts to cut off financial support for terrorists as well as in the administration's international initiatives on financial services and taxation.
Dam has held several other high level government positions, including deputy secretary of state (1982-85), executive director of the White House Council on Economic Policy (1973), and program assistant director for national security and international affairs at the Office of Management and Budget (1971-73).
Dam is well known as an arbitrator in complex litigation, particularly for his role as System Arbitrator from 1996 to 2001 in the collective bargaining agreement between the National Basketball Association and the National Basketball Players Association.
www.brookings.edu /comm/news/20030310kdam.htm   (530 words)

  
 Tom Miller Dam Encyclopedia Article @ FredericksburgArtists.com (Fredericksburg Artists)   (Site not responding. Last check: 2007-09-19)
Tom Miller Dam is a dam located at 30.2932, -97.7855 (WGS 84 datum) on the Colorado River within the corporate limits of Austin, Texas, USA.
It is one of several dams constructed by the City of Austin for the purpose of flood control and for generating hydroelectric power.
The dam is located at the site of the city's two previous dams, each of which were destroyed during major floods.
fredericksburgartists.com /encyclopedia/Tom_Miller_Dam   (291 words)

  
 Watershed Management
In particular, efforts to remove, alter, or manage dams that are near the end of their useful lives and that are as large as Searsville involve strategies and technologies with consequences and effectiveness that are still poorly understood and for which there is relatively little experience.
Whether considering lowering or removing the dam, we want to caution that potential impacts from either option are significant enough that careful study is needed to determine the real extent and nature of the impacts in order to avoid severely undermining the integrity of Preserve habitats and its research and educational mission.
The dam is located within a biological preserve with an extensive background of ecological research, and the protection of the watershed and surrounding communities provides an ideal setting for long-term research on ecosystem effects of dam removal or alternative management strategies.
jrbp.stanford.edu /watershed.php   (1529 words)

  
 Soda Dam, Santa Fe National Forest - USDA Forest Service
Soda Dam is a unique geologic feature formed due to both the presence of a geo-thermal system and to deep seated faulting in the area.
At Soda Dam, the colorful veil and flowing appearance reflect the cumulative deposits of thousands of years of minerals, dissolved from rocks deep under the earth, and brought to the surface by the hot springs rising along the fault.
The bubbles that can be seen rising in the spring waters of Soda Dam are gases dissolved in the water at depth, which on reaching the surface are released into the atmosphere, similar to bubbles in a carbonated drink are released from a bottle or can when opened.
www.fs.fed.us /r3/sfe/districts/jemez/poi/sodadam.htm   (345 words)

  
 Bailey's Dam
Night and day the work was carried on without cessation, the men working willingly and cheerfully, although many were compelled to stand up to their waists in water during the damp and chilly nights, and under a burning sun by day, and notwithstanding very many had no faith in the success of the great undertaking.
Then, with the built-up water pressure, the dam could be broken through at the proper time and the gunboats could rush over the lower rapids, carried by the force of the released water.
The tree dam excavations revealed that both pine and hardwood logs were used and that the tree bark was left intact.
www.crt.state.la.us /archaeology/BAILEYS/dam.htm   (2208 words)

  
 Davis Aquatic Masters Swimming
DAM boasts a membership of over 600 people from all ages and walks of life.
DAM members range from beginning swimmers to world champions.
DAM provides a program that attracts and retains enthusiastic members and professional coaches, promotes and sponsors quality swim events and proudly provides community service.
www.damfast.org   (388 words)

  
 The Aswan Dam   (Site not responding. Last check: 2007-09-19)
The High dam was actually the second dam at Aswan, the first one having been built in 1889.
Due to the irregular flooding pattern of the Nile river and increased water demands, the dam had to be raised on 2 occasions (1912 and 1933) in order to ensure its continued usefulness and safety.
Dams, like any other technical "advancement", need to be analyzed not only on the basis of their perceived economic benefits and their dollar cost, but also on their environmental, and social impacts as well.
carbon.cudenver.edu /stc-link/aswan1   (426 words)

  
 WWF - Dam problems
As a result, the benefits that dams provide - such as hydropower, irrigation, and flood control services - are often overtaken by negative environmental and social impacts.
Dams disrupt the ecological balance of rivers by depleting them of oxygen and nutrients, and affecting the migration and reproduction of fish and other freshwater species.
WWF's Dams Initative is tackling head-on the problems posed by ill-thought out dam schemes and proposing new ways in which Dams can reduce their environmental impacts...
www.panda.org /about_wwf/what_we_do/freshwater/problems/infrastructure/dams/index.cfm   (573 words)

  
 Pennsylvania State Parks - Whipple Dam - PA DCNR
Whipple Dam State Park is in the northeastern corner of Huntingdon County, 12 miles south of State College.
The purpose of the dam was to supply a source of water for the operation of an “up and down” sawmill.
In 1935, the CCC dismantled the old dam and constructed the existing dam and bridge.
www.dcnr.state.pa.us /stateparks/parks/whippledam.aspx   (1212 words)

  
 Victoria Dam
However, if the river-run exceeds the storage capacity of the Victoria Dam and the 850 cubic feet per second utilized by the turbines while operating at a full load, it is necessary to spill the excess water through the radial spill gates.
Bergland Dam is a low-head structure built of vertical steel I-beams and wood plank flashboards and is 179 feet long and 4 feet high.
Control Dam, similar in design to the Main Dam, is approximately 850 feet long and 40 feet high and is equipped with a steel slide gate five feet square.
www.ontonagonmi.com /victoriadam.html   (771 words)

  
 NM00121 - Heron Dam - New Mexico
Two normal faults are present 500 to 1000 feet upstream of the dam; one strikes E-W, about 2 miles long, with displacement varying from 2 to 50 feet and the other strikes N-S, about 1.1 miles long and has displacement of up to 75 feet.
The contact between the Dakota and Morrison formations was found at elevation 6958 in the right abutment and elevation 6948 in the left abutment.
The Morrison sandstone and shale comprising the dam foundation were described as fine to medium grained, clayey, firm to moderately hard, friable, jointed, brown, green and gray (for the shale).
www.usbr.gov /dataweb/dams/nm00122.htm   (295 words)

  
 DAMsimple | Home
DAM (Digital Asset Management) is what you do with your digital images after you've captured them.
DAM is a term used to describe the practise of handling digital files including digital images.
DAM can ensure other people know all they need to about your images; copyright, usage, how to contact you, who/what/where of the image, and more.
www.damsimple.com   (234 words)

  
 Introduction to the Digital Art Museum, the world's leading online resource for the history and practice of digital ...
Discussion with Wolfgang Lieser on [DAM], its aims of gaining a broader understanding and acceptance of digital media, and the new d.velop digital art award [ddaa].
[DAM] is an on-line museum with a comprehensive exhibition of Digital Art supported by a wide range of background information including biographies, articles, a bibliography and interviews.
[DAM] is intended for the enjoyment of all visitors, curators and collectors, scholars of art, and for an emerging generation of digital artists wishing to understand a 50-year heritage of innovation and experimentation.
www.dam.org /intro.htm   (353 words)

  
 History of the Columbia Basin Project
Grand Coulee Dam and the Columbia Basin Project are managed by the U.S. Bureau of Reclamation, an agency of the Department of the Interior.
A final report favoring the construction of the dam was produced by the Corp of Engineers in late 1931 and presented to the 73d Congress of the United States as House Document #103.
By 1941 the main dam was essentially finished with construction of the powerhouses and pumping plant underway.
users.owt.com /chubbard/gcdam/html/history.html   (898 words)

  
 Conowingo Dam Site Guide
Conowingo Dam is located in northeastern Maryland on the Susquehanna River just northwest of where the river empties into the northern part of the Chesapeake Bay.
Birds feeding at the base of the dam during generation are in the air most of the time and are close enough to be viewed with binoculars.
There is a retaining wall in the center of the dam and an adult has been seen sitting on the wall almost every day in winter for at least a decade.
www.harfordbirdclub.org /conowingo.html   (3568 words)

  
 Giant Chinese Dam May Cause Earth to Move, Alaska Science Forum
Born in the mountains of the Tibetan Plateau, the Yangtzi River flows almost 4,000 miles to the ocean, making it the third longest river in the world after the Nile and the Amazon (the Yukon is half the length of the Yangtzi).
The water rising behind the dam will power 26 huge turbines to provide electricity, and will allow people to control a river that has killed 300,000 people by flooding during the 20th century.
He added that the chances of the dam being destroyed by an earthquake are small, but because the consequences are so severe any seismic activity induced by the reservoir has to be taken seriously.
www.gi.alaska.edu /ScienceForum/ASF14/1465.html   (663 words)

  
 Investigation of the Hadlock Pond Dam Failure
As a result of the dam failure and the water flowing through the area where the dam was breached, Clough Harbour engineers were not able to see evidence of the exact path of the failure.
When construction is completed, the dam owner must notify DEC and include a certification from the dam owner's engineer that he or she supervised the construction and that it was done according to the approved design.
For selected dams, a satisfactory inspection by DEC and a DEC letter of approval to fill are required before the owner is allowed to refill the waterbody behind the dam.
www.dec.state.ny.us /website/dow/hadlock.html   (1205 words)

  
 Dalles Dam Oil Spill   (Site not responding. Last check: 2007-09-19)
Transformer unit T2B had secondary containment, but the inadequate sealing of the expansion joint in the containment allowed oil to drain to the roof behind the transformer, thence to the roof drain which was piped to the lower part of the dam in the tail race.
It was via this path that the 1,900 gallons of oil which ultimately reached a point about 40 miles downriver of The Dalles Dam reached the water from unit T2B.
By the time the actual volume of the spill was established, most of the oil had already moved downstream and was no longer recoverable.
www.ecy.wa.gov /programs/spills/incidents/dallesdam04/dallesdam04base.htm   (1674 words)

  
 Harm Jetten's draughts program
The most significant difference with DAM 2.1 is the facility to play draughts with another player over the Internet, using the DamExchange protocol written by Frank Mesander.
In case you don't have a sound card, it's likely you can still enjoy the DAM sound effects with the Windows PC speaker driver, and the mono version of the DAM.wav files.
An endgame database allows DAM to quickly look up whether a position with a few pieces on the board is either won, drawn, or lost.
www.xs4all.nl /~hjetten/dameng.html   (1153 words)

  
 CNN In-Depth Specials - Visions of China - Asian Superpower: China's Three Gorges Dam
And the dam's hydropower turbines are expected to create as much electricity as 18 nuclear power plants.
Many high-ranking Chinese officials expect the dam to become a potent symbol of their nation's vitality in the new century and the new millennium.
There are also claims that the dam will actually contribute to the silt accumulation in the Yangzi, rather than allow larger ships to travel the river.
www.cnn.com /SPECIALS/1999/china.50/asian.superpower/three.gorges   (1638 words)

  
 Digital Asset Management
Digital assets are a higher class of content, distinguished by the quality of information (“metadata”) describing the asset, which is critical to maximising the re-use and financial value of intellectual property.
DAM was initially used by the media and entertainment industry for the management of video and print assets, but in the past five years has been widely adopted by advertising and corporate marketing departments, who use DAM to manage brand materials and collateral, and government sectors.
The scope of many DAM projects, and of the DAM Symposium, has extended beyond the basic storage, search and retrieval capabilities of DAM to consider the integration of DAM and metadata into ingest-create-manage-distribute workflows and digital media strategies.
www.damusers.com   (264 words)

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