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• Fish ladders enable salmon - and other fish that live in the sea, but spawn in rivers - to get past the dams. ...
• Modern dams also make use of fish bypass structures. Migrating fish are routed around the dams's turbines to minimize danger. ...
• About Hydropower | Multi -Purpose Dams Of The NW | Federal Hydro Projects | Hydro Cycle | Power Generation | Flood Control | River Navigation | Recreation | Storage | Fish Passage | Irrigation .

• The World Bank is the greatest single source of funds for large dam construction, having provided more than US$50 billion (1992 dollars) for construction of more than 500 large dams in 92 countries. The World Bank has been "directly or indirectly associated" with around 10% of large dams in developing countries (excluding China, where the Bank had funded only eight dams up to 1994). The importance of the World Bank in major dam schemes is illustrated by the fact that it has directly funded four out of the five highest dams in developing countries outside China, three out of the five largest reservoirs in these countries, and three of the five largest hydroplants. ...
• The Bank's own 1994 "Resettlement and Development" review admits that the vast majority of women, men and children evicted by Bank-funded projects never regained their former incomes nor received any direct benefits from the dams for which they were forced to sacrifice their homes and lands. ...
• According to the Manibeli Declaration these large dams have had "extensive negative environmental impacts, destroying forests, wetlands, fisheries, habitat for threatened and endangered species, and increasing the spread of waterborne diseases. " In addition the World Bank has "tolerated and thus contributed to gross violations of human rights by governments in the process of implementing Bank-funded large dams, including arbitrary arrests, beatings, rapes, and shootings of peaceful demonstrators. ...
• The World Bank is currently funding the Lesotho Highlands Water Project (LHWP) Africa's largest infrastructure project, involving five dams (one of which is built and another underway), miles of tunnels through the Lesotho mountains, and a small hydropower component. ...

• COLUMBIA RIVER BASIN - DAMS AND SALMON.
• There are over 250 reservoirs and around 150 hydroelectric projects in the basin, including 18 mainstem dams on the Columbia and its main tributary, the Snake River.
• Overharvesting in the late 1800s into the early 1900s, effects on habitat from farming, cattle grazing, mining, logging, road construction, and industrial pollution, and the complex of tributary and mainstem dams all have had an impact. ... Dams clearly have had a significant impact, particularly those that eliminated access to fresh water habitat (preventing adult fish from returning to spawn), and those through which fish passage is provided but at reduced levels from natural conditions.
• The dams impede juvenile and adult migrations to and from the ocean by their physical presence and by creating reservoirs. The reservoirs behind the dams slow water velocities, alter river temperatures, and increase predation potential. ... The Corps operates a series of eight dams on the lower Columbia and Snake rivers that affect the habitat and migration of anadromous salmon and steelhead species. ... These dams are equipped with adult and juvenile fish passage facilities.
• Adult Fishways at the Dams.
• Adult fish ladders at all eight lower Columbia and Snake dams were integrated into the design of the dams beginning with Bonneville in 1938. These ladders consist of a series of steps and pools which provide a gradual upward climb over the dams for returning adults. ...
• Juvenile Fish Passage at the Dams.
• Currently, juvenile fish can migrate past the dams by several routes: through the turbine; through the juvenile fish bypass system; or over the dam spillway. Some fish are transported past the dams by barge and truck under the juvenile fish transportation program. ...
• The juvenile fish bypass systems in place at seven of the eight lower Columbia and Snake River dams (another is planned for The Dalles) guide fish away from turbines by means of submerged screens positioned in front of the turbines. ... The fish are then either routed back out to the river below the dam, which is called "bypassing" or, at the four dams with fish transport facilities, fish can be routed to a holding area for loading on specially equipped barges or trucks for transport downriver. ...

• on Large Dams Incorporated.
• The Australian National Committee on Large Dams Incorporated (ANCOLD Inc) is an incorporated voluntary association of organisations and individual professionals with an interest in dams in Australia.   ANCOLD was formed in 1937 as the Australian national committee of the International Commission on Large Dams (ICOLD), a non-government organisation established in 1928, and is one of 81 member countries.
• ANCOLD's goal is to encourage improvement in the planning, design, construction and operation of large dams in Australia, and to ensure that dam owners have access to world best practice through the skills of Australian professionals.
• Publication of Guidelines setting national standards in many aspects of dams and their environs; .
• Holding an Annual Conference on dams with associated study tours of dam projects; .
• Publication of a periodical bulletin with technical papers and discussion related to dams; .
• Publication of national registers of large dams, tailings dams and dam incidents; .
•   The Executive is served by a Secretariat, which in the past has been drawn from a major state agency involved with dams. ...
• | Conferences | Dam Information | Dams Register | Executive | Membership |.

• SAVE our DAMS.
•   Les has contributed a lot of time and energy helping Save Our Dams and his efforts are most appreciated by everyone. ...
• SAVE our DAMS .
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• sing " Save Our Dams " .
•   Reclamation that illustrates the multipurpose aspects of dams.
• SAVE our DAMS.
• "We don't need to be breaching any dams that are producing electricity. ...
• We can have both, salmon and dams ! .
•      This years salmon return are the highest they have been since dams were constructed on the Snake and Columbia rivers. ...
•  This is the result of ocean and weather conditions and the successful use of fish friendly technology used at the dams.
•   Hydropower, and dams make this all happen. ...
• to take out the dams and. ...
•   (Please refer to Flow Augmentation area of this web page )   and  (The Fish Friendly Dams area of this web page)    Yes they want everyone's water, however it is not for fish, it is about control and power. ...
•      There is a movement in the Pacific Northwest to destroy large dams on the Snake and Columbia Rivers for salmon restoration. ...   Our dams are the lifeblood of our local economy. ...   We believe dams and salmon can co-exist together. ...

• United States Society on Dams.
• The Benefits of Dams to Society.
• that dams contribute significantly to reducing air pollution? As we are all well aware, one of the major benefits of dams is the production of hydroelectric energy. ...
• This article is based on information from the slide presentation on the benefits of dams to society, developed by the USCOLD Committee on Public Awareness (COPA).

• Rehabilitating Our Nation's Aging Flood Control Dams.
• Local watershed project sponsors, assisted by the USDA Natural Resources Conservation Service (NRCS), have constructed over 10,450 upstream flood control dams in 47 states under the PL-534, PL-566, Pilot, and RC&D water resource programs. ... Some dams pose a threat to the public health and safety of community residents while others have potential for creating adverse environmental impacts in downstream floodplains that have been protected by the dams for the past 50 years. ...
• Population has grown, development has occurred upstream and downstream from the dams, landuse changes have taken place, sediment pools are filling, structural components have deteriorated, and many do not meet state dam safety regulations that have been revised with more stringent requirements since the dams were built.
• A major challenge exists as more than 2,000 dams need rehabilitation at an estimated cost of more than $540 million. Public safety, environmental concerns, funding, and liability are just some of the issues that must be addressed before these dams reach the end of their design life. ...
• Since 1948, more than 3,400 flood control dams have been constructed in the 320 sub-watershed projects covering more than 35 million acres in 12 states.
• More than 6,300 flood control dams have been constructed in the 1,613 PL-566 projects authorized to date that involve over 109 million acres in every state in the nation.
• More than 400 flood control dams were constructed in the 62 pilot projects in 33 states covering almost 3 million acres. The RC&D Program has also provided technical and financial assistance to local sponsors in RC&D areas for the planning, design, and construction of more than 200 flood control dams since the 1960’s.
• The 1995 national dams inventory is the source of this data. Some states have not updated this inventory; due to the small number of dams installed in recent years, the inventory is the best data available.
• Since 1948, these four watershed programs have resulted in the construction of over 10,450 flood control dams and more than 5,000 grade stabilization structures. ...
• Since 1948, these four watershed programs have resulted in the construction of over 10,450 flood control dams and more than 5,000 grade stabilization structures.
• These flood control dams typically consist of an earthen embankment; heights generally range from 20 to 80 feet. The dams have small drainage areas 1 to 10 square miles located on intermittent drainageways in the upper reaches of watershed tributaries. ...

• COLUMBIA RIVER BASIN - DAMS AND SALMON.
• Three of the four Snake River dams, and McNary Dam on the Columbia River, have fish transport facilities. At these four dams, juvenile fish that go through the bypass systems can be routed either directly back into the river below the dam, or to holding and loading facilities for loading into barges or trucks for transport. ...

• Why do some dams last while others fail? How much water can a dam hold, anyhow? Check out these dams to find out:.
• Learn more about the shapes used in dams and other structures in this interactive workshop.
• Meet Andrew Straz, an engineer who knocks down dangerous dams!.
• Dams, dams, and more dams! Check out this list of resources on the Web.
• BUILDING BIG: Dams.
• Bridges | Domes | Skyscrapers | Dams | Tunnels .

• About the NPDP NPDP FAQs Reporting Dam Incidents About Dams What's New What's Ahead .
• Recently Ron Corso sent the NPDP a CD containing photographs he has taken over the years of mill dams. ...
• NPDP Dams Directory.
• This is the NPDP dams database. For a more detailed description of the Dams Directory, click here.
• Dams & Earthquakes.
• Real-time mapping of dams located near recent earthquakes. ...
• Dams Dictionary.
• Earthquake & Dams Application.
• This tool maps dams located near recent earthquakes reported by the U. ...

• Remove or Decommission the Four Lower Snake River Dams .
• Some natural river migration advocates suggest that salmon would benefit by removing, or breaching a passage way through, or constructing bypasses (and decommissioning the dams) to allow the river to flow past the four dams on the Lower Snake River. ...
• The reason that these dams are a problem to salmon is related to climatic conditions. ... Compared to the dams on the Columbia where water is abundant, less water passes by the Lower Snake dams, and less water is spilled over the spillways. ...
• Then they are transferred to barges or trucks and transported around the dams where they are released below Bonneville Dam. ...
• Those that advocate removing or breaching or making a year-round passage way around the dams maintain that the four Lower Snake River dams produce much less power than the other dams and that only a few farmers that rely upon the reservoirs behind the dams for irrigation water for their crops would be affected. ...
• The Council has not taken a position on breaching the lower four Snake River dams. ... In our 1994 fish and wildlife program (the latest revision, although we are about to start another) we called for a phased-in strategy of drawdowns of the four dams. ...
• If native runs cannot be maintained in sufficient numbers to ensure their survival as a strain, and breaching the dams may be reasonably expected to do this, then the dams should be breached. ...
• This would probably be accomplished by constructing bypasses to allow the river to flow past the dams, rather than breaching or removing the dams. ...
• The DSIs do not support removing or breaching Columbia and Snake River dams. Scientific evidence demonstrates that healthy salmon populations can co-exist with dams, and there is no scientific basis for dam removal. ...
• " This plan calls for the removal of part of the earthen embankments of the four Lower Snake River dams in Washington and mothballing their facilities until such a time as the technology exists to operate them without killing our fish. ...
• However, the government's current plan is to spend $435 million each year to maintain the current fish killing operation of the dams. ... Are the dams worth the loss of our fish and the health of our aquatic ecosystem? What are the costs and benefits society gets from the Lower Snake Rivers Dams? .
• We believe that building the four dams on the Lower Snake River was a mistake. ... It is time to take our losses and take these dams out of service. ...

• An Economic Analysis of Four Federal Dams on The Lower Snake River .
• This paper assesses the cost of operating four federal hydro-electric dams on the Lower Snake River. Because these dams are the key cause of the loss of Snake River salmon and steelhead fisheries, and because of the costly Bonneville Power Administration (BPA) effort to restore these fish, the dams are not an efficient source of electric power benefits. ...
• Removing the four lower Snake River dams would very likely restore Snake River salmon and steelhead and would obviate the need for annual salmon recovery outlays of $334,600,000 by BPA. If the dams were removed (and the combined cost of removal and the cost of replacement power were paid) the net loss of economic benefit would be reduced to ($86,390,921) per year. ...
• Four dams on the Lower Snake River in the state of Washington are the key cause of the decline and near extinction of Snake river salmon, now on the Endangered Species List. The Lower Snake river dams are Lower Granite, Ice Harbor, Little Goose and Lower Monumental. While these dams provide some public and private benefits, proposals to remove or modify them in order to restore Snake River salmon and steelhead fisheries are under discussion by the people of the Northwest. ...
• Unlike capital and operations & maintenance costs (O & M), there is great variability in the range and amounts of external costs ascribed to dams, and in the amounts of payments or mitigation for external costs charged to dam operators. ...
• This is the standard comparative method used by economists to assess power dams; it may provide a positive or a negative result. This method is a good way for society and public agencies to look at dams. ...
• In this section the capital, operations & maintenance and external costs of the four Lower Snake River dams are developed. The cost of physically breaching the dams is proposed. ...
• Total plant investment in the four Lower Snake River dams is $1,111,409,000. ... None is being paid by navigation or irrigation beneficiaries of the dams, except in a very limited way to the extent that they use electric power. The dams provide no flood control benefit. ... Since the dams have been in service since the 1970s it would be reasonable to assume they are partly paid off. ...

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