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Roubaix - The Roubaix Canal

The Roubaix Canal Dredging Scheme between the Belgian-French border and the River Deule has been carried out as part of the European Union funded 'Blue Links' project.

Some 160.000m³ has been dredged on both the Roubaix Canal and the River Marque.  Included in the contract was the construction of a dewatering area,  devided into three separate catchment areas on top of the waste mountains, in the past created by the local gypsum industry at Wattrelos.

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The bottom layer of the bassins consisted of bentonite matting and drainage material.  The effluent was discharged through this drainage system.

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Additionally a 1.200m² consolidation area was created to catch the effluent originating from the dewatering areas.  Analysing and disposal of this water has been conducted in accordance with French environmental legislation.

 
 
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Included as well was the construction of two quay walls to provide for truckloading of the dredged material.

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Dredging was carried out using two small backhoe dredgers and a fleet of small barges.  An average daily output was realised of 450-1.000m³.

 
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Subsequently another 20.000m³ capacity silt area has been created adjacent to the E17 Motorway embankment.  Its 40.000m² surface has been waterproofed entirely with a MRC-membrane as well as an external drainage system to allow analysed water to drain back into the canal.

 
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Finally The locally known PCUK-site was used to dewater approx. 130.000m³ of silt with a reduced water percentage of 30%.

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http://www.bluelinks2008.org
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