The Object Of This Contract Is The Execution Of Cleaning Works In Sections Of Streams Of The P.E. Messinia, For The Restoration Of Their Hydraulic Cross-Section. The Aim Of These Works Is A Quality Intervention, I.E. To Restore The Hydraulic Cross-Section In Parts Of The Streams As Well As Under Technical, Confluence Positions And Even Culverts Of Provincial Or National Roads Under The Responsibility Of Maintenance Of The P.E. Messinia, Etc., For The Restoration Of Their Drainage Capacity And The Anti-Flood Protection Of The Intervention Area.