Drafting of the characterization studies of the material to be dredged for a total of eleven ports, as well as the drafting of the studies of not affecting the Natura 2000 Network in eight of them.

The scope of the services and work to be carried out consists in the drafting of studies on characterization of the material to be dredged for a total of eleven ports, as well as the drafting of non-affection studies to Red Natura 2000 in eight of them. Although the Ports and Transport Infrastructure Service has allocated a total of twenty-four autonomically owned ports only sediments are analyzed in eleven of them because the permits associated with these characterizations are valid for four years and not all of them expire on the same dates, eleven expire in the next two years eleven expire of those twenty-four permits.