The operation has as its object a set of requalification interventions of the Hydrographic Network of the municipalities of the Northeast, Povoação and Ribeira Grande. The interventions shall comprise: — The damping and retention of solid flows in the Cancela Grota and construction of two hydraulic passages in Ruas Nova and Moio, repair of the damage in the Grota do Cinzeiro along Rua do Moio and reconstruction of the walls of Ribeira dos Palames, in the municipality of Nord