Improvement of sanitation systems and treatment of concrete for structures and superstructures.

The work will include: - Replacement of cornices-gutters by closed cantilevered pipe of the intrados (length of 300 ML) - Treatment of the concrete and waterproofing of the BN4 sills on the edge and GS in TPC (700 M2);- Resumption of the vertical waterproofing readings and the asphalt channel (length of 600 ML); - Concrete treatment of the 4 abutments (about 200 M2); - Trench sanitation (70 ML); - Restoration of rainwater collection and drainage systems on and off viaducts (2 decks of 150 ml in length); - Miscellaneous equipment for secure access.