The work will be carried out under:

- preventive maintenance or occasional treatment of embankments or rock walls that are not reinforced following the identification of a risk, with the construction of new structures;

- routine maintenance and repair of existing protective equipment against falling boulders or stones, namely more than 470 structures distributed along departmental roads;

- the immediate safety of an embankment, a structure, a rock wall, or emergency intervention twelve hours and this 365 days a year, following bad weather or unforeseeable geological events.

The work takes place mainly in acrobatic conditions requiring specific qualifications. This contract is allotted in two geographic lots.

South Sector:

- antennas of Laragne,

- Veynes,

- Gap,

- Saint-Bonnet.

North Sector:

- Briançon branches,

- Eygliers.