project management and additional missions for hydraulic structure rehabilitation works: Opening of the rainwater frame and the auge before discharge into the sea at Six Fours les Plages. Tranche contract with one firm tranche and 4 optional tranches. Sample mission (diag avp pro act visa exe partiel det aor) at a provisional fixed price. Additional assignments at final fixed prices. The share of the provisional financial envelope allocated to the works amounts to: 1,300,000 euros (excluding VAT).

Two frames are thrown into the sea:

- the Storm drainage system on Avenue de la Mer, with a 2*1 m frame,

- the Augeas watercourse (160 ha of watershed) by a 3*1.5 m frame.

The outlets are largely permanently submerged.

It was decided to move towards a solution of open air casting of the frames, from downstream of the roundabout to upstream of the sea, in order to facilitate the cleaning conditions and avoid the obstruction of the frames by sand/posidonia deposits.

The project would consist of opening the 2 frames on a U-shaped section 4 m wide from the gabion (sea) to the roundabout

Firm Slice 4 Optional Slices. In the event of recovery of the instalments over time, the minimum overall duration for the performance of all the services is 36 months