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Olympic Games,Paris...


Erwin

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7 hours ago, LSP_Ray said:

 

Probably France is dealing with a similar problem that still plagues Portland, Oregon. While there are all kinds of clean water acts and policies, when you are dealing with drain systems first built over 100 years ago, all kinds of problems have to be overcome. Paris would be dealing with even older systems. One problem Portland has to deal with, and I bet Paris and other cities in France are the same, is the old "combined drainage" systems. That is old drains that handle both storm drain and sewer.  Because there is sewage in them, they go to the sewage treatment plants. So, in any heavy rain or flood conditions the amount of rainwater causes the sewage plants to be overwhelmed, and they have to dump the excess directly in the river. Combined drains have not been allowed for many decades, but there are still some out there and every once in a while, they still discover a system that doesn't even show up in their records. Like the one our excavator hit while digging footings for a project that filled the whole block-sized job with two feet of sewage!

Indeed. Some European cities have still part of the sewing system coming from the end of the 19th century. Add to that the lacunar documentation of such works and you get the result you described. Actually, documenting correctly what was made underground started in the best case mid-20th century. So it is not uncommon to make surprising discoveries! Just to give an example the city I'm living in was created more than a millennium ago. This gave time to do A LOT of things!

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