During periods of heavy rainfall, part of Marigot is flooded. The main reason is too much urbanization, especially in the Concordia sector. Waters can no longer flow normally in the Concordia and Spring gullies.
When Semsamar had presented the construction of subdivision above the media library (on the way to the hospital), the prefecture had stopped the project because it did not comply with the water law, precisely because no measures to protect the populations downstream was taken to limit flooding. It was the same in Quartier d'Orléans where Semsamar was forced to build a retention basin to limit flooding.
Today, the Collectivity wishes to carry out a structure similar to Concordia to reduce flooding in the Spring-Concordia sector. It would be a basin capable of retaining up to 6 cubic meters of water over two meters deep and thus reducing the flow of the gully. It would be installed in the major bed of the Spring ravine, on the ground behind the media library and sports facilities. It would have a thirty-meter long parapet (merlon) as well as a thirty-meter long weir also made of concrete riprap.
This basin would reduce, in the event of a flood, the maximum flow rate of water coming from the Spring watershed. The flood peak of the Spring ravine being delayed, that of the Concordia ravine - which it encounters a little lower - will also be delayed.
The Collectivity estimates the cost of the works at
450 euros. She is looking for a prime contractor to carry out the work.
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