Simply throwing a new dam onto a river with a diversion would impair some down stream users prior right to use that water.
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Instead of building a great wall across the Xingu to create a massive reservoir, Belo Monte is designed as a run-of-river dam, a technique that harnesses the natural flow of the river to drive the turbines.
Erecting a hydroelectric dam, which tends to put the river goddess into a vile mood, requires more elaborate trickery.
"We all admire the beaver for the way it can turn a linear river into a lake with a dam, but the termites turning the desert into a pattern of oases that allow permanent life even in drought periods for hundreds of years - that's much more fascinating, " he told BBC News.
Residents downstream from a dam on the Tangipahoa River have been ordered to evacuate Thursday afternoon.
FORBES: Thousands Evacuate As Isaac-Swollen Dam Faces Imminent Collapse
As many as 1, 500 residents of the northern Illinois city of Marseilles were evacuated after seven barges broke free from a towing vessel and struck a dam on the Illinois River.
The World Bank claims to have learned the lessons of equally worthy-sounding schemes that went badly awry, including a dam on the Mun river in neighbouring Thailand, which left many fishermen destitute as their catch disappeared.
Google will pay the Oklahoma utility, Grand River Dam Authority, a premium for the electricity generated by the Canadian Hills Wind Project when it comes online this year.
FORBES: Google Signs Utility Deal To Power Data Center With Wind Energy
On his release he began to campaign for a big dam on the Iato river, which roared down in the winter rains and dried up in the nine arid months.
Chandler said the U.S. Army Corps of Engineers had adjusted a nearby dam to drop the river's water level by 2 feet and was regulating the current to make it easier on the divers, whom Chandler directs.
CNN: Driver makes dramatic underwater escape after bridge collapses
Voters in Tokushima, on the island of Shikoku, are fighting construction-ministry bureaucrats over a new dam for the nearby Yoshino river.
India's dam will divert some of the river down a 22km (14-mile) mountain tunnel to turbines.
The brutal truth is, Washington's finest natural asset, thousands of cherry trees, currently blossoming in shades of white and pink, are being destroyed by two rogue rodents seemingly intent on building a dam across this city's Potomac River.
The construction of the Gezhouba dam in 1981 on the Yangtze river also created a barrier to the migrating fish which further affected fish stocks.
Tamil Nadu is involved in a spat with Kerala over the Mullaperiyar dam on the Periyar river and says some scenes in the film depict related "issues".
Tamil Nadu was involved in a spat with Kerala over the Mullaperiyar dam on the Periyar river and said some scenes in the film, Dam999, depicted related "issues".
BBC: India's Tamil Nadu suspends Kamal Haasan's Vishwaroopam
The Samarra bridge has a dam that generates power and regulates water levels on the Tigris River.
It was a massive undertaking, requiring a 7-story dam below the water level of the adjacent Hudson River.
Under the Ghandi style leadership of an extraordinary woman the people who live on the banks of the Narmada river in India have managed to halt the construction of a dam that threatens to destroy their way of life.
MW. The Bonneville hydroelectric dam on the Columbia River, near the site of the Oregon windmills, produces a fifth of that all by itself.
This plummeted over 80% when the dam began operation, and a decade later, through extensive government investment to restock the river, the species number is still less than half the original amount.
In eDNA testing of samples taken in 2011, a year earlier, researchers recorded a positive eDNA test of silver carp above the Coon Rapids dam on the Mississippi River, raising alarm that the fish were heading upstream faster than anticipated.
"One of our mottos is get the dam thing right, " said Steve Heintzelman, a local realtor who co-founded Grand River Future Vision, a group of fishing enthusiasts who initially opposed the plan.
When barges disappeared from the river in the mid-1800s and sawmills later closed, Edwards Dam no longer served a purpose.
The Proms programme also includes a concert featuring scores from celebrated British films including The Dam Busters, Shakespeare In Love, Bridge Over The River Kwai and Harry Potter and the Philosopher's Stone.
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