Eiffel did it too, over the Loire in France.



On Jun 29, 2011, at 1:38 PM, Alice Weiss wrote:

This is wonderful stuff.  Thanks. Alice
 
From: neighbors-bounces+amjweiss=alum.barnard.edu@buenavistasocialclub.org [mailto:neighbors-bounces+amjweiss=alum.barnard.edu@buenavistasocialclub.org] On Behalf Of Ruth Ryals
Sent: Wednesday, June 29, 2011 12:58 PM
To: Neighbors@buenavistasocialclub.org
Subject: [Neighbors] FW: River over a river
 
Wow! 
 
From: Gail Ellison 
Sent: Wednesday, June 29, 2011 12:54 PM
To: Ruth Ryals
Subject: Re: River over a river
 
Thought you and Jim might enjoy this, if you haven't seen photos. . . 
 
<image001.jpg>
 
Even after you see it, it is still hard to believe!
Water Bridge in Germany. What a feat!
Six years, 500 million Euros, 918 meters long . . . now this is engineering!

This is a channel-bridge over the River Elbe and joins the former East and West Germany ,
As part of the unification project. It is located in the city of Magdeburg , near Berlin .
The photo was taken on the day of inauguration . . .

To those who appreciate engineering projects, here's a puzzle for your armchair engineers
. . . and physicists.

Question:

Did that bridge have to be designed to withstand the additional weight of ship and barge traffic,
Or just the weight of the water?
 
 

Answer:

It only needs to be designed to withstand the weight of the water!

Why?
 
A ship always displaces an amount of water that weighs the same as the ship, regardless of how heavily a ship may be loaded.
 
 
> > > > More . . . .
 
 

Saturday, April 23, 2011

The Incredible Magdeburg Water Bridge in Germany

The Magdeburg Water Bridge is a navigable aqueduct in Germany that connects the Elbe-Havel Canal to the Mittelland Canal, and allows ships to cross over the Elbe River. At 918 meters, it is the longest navigable aqueduct in the world.
The Elbe-Havel and Mittelland canals had previously met near Magdeburg but on opposite sides of the Elbe. Ships moving between the two had to make a 12-kilometer detour, descending from the Mittelland Canal through the Rothensee boat lift into the Elbe, then sailing downstream on the river, before entering the Elbe-Havel Canal through Niegripp lock. Low water levels in the Elbe often prevented fully laden canal barges from making this crossing, requiring time-consuming off-loading of cargo.
<image002.jpg>
Construction of the water link was started as early as in the 1930s but due to the World War 2 and subsequent division of Germany the work remained suspended till 1997. The aqueduct was finally completed and opened to the public in 2003.
<image003.jpg>
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<image006.jpg>
<image007.jpg>
 
 
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