Urgent interventions to restore the cliff in boulders to protect the S.P.N. 39 Direction 1 from KM 1+100 to KM 1+300 approximately, in the municipality of San Benigno C.S

Measures for flood and hydrogeological risk reduction (Mission 2 – Component 4 - Investment 2.1)

The Italian territory is characterised by a significant degree of hydrogeological instability, which has been exacerbated by the effects of climate change. This risk has a detrimental impact not only in the quality of life but also in the economic activity of the areas most exposed to this risk.

Italy’s Recovery and Resilience Plan provides this measure divided into two lines of action, with Protezione Civile and “Commissioner of Emergency for the reconstruction in the territories of Emilia Romagna, Tuscany, and Marche” affected by the May 2023 floods (Commissario per la ricostruzione nel territorio della regione Emilia Romagna, Toscana e Marche), as responsible Administration, respectively.

Regarding the first line of action, a broad and comprehensive set of interventions shall be undertaken to restore damaged public structures and infrastructures (type E interventions) and reduce residual risk strictly connected to the event and aimed primarily at protecting public and private safety (type D interventions).

The second line of action shall include interventions identified by the Commissioner of Emergency in particular the provinces of Ascoli Piceno, Bologna, Ferrara, Fermo, Firenze, Forli-Cesena, Modena, Pesaro-Urbino, Ravenna, Reggio-Emilia, Rimini.

The interventions shall concern:

• Interventions to restore waterways and increase protection against floods. The interventions shall include as far as possible nature-based solutions. The interventions should also promote, to the extent possible, the adoption of sustainable soil and land management practices for supporting long term-resilience of soils, for stopping soil degradation and for mitigating the impacts of climate change;

• Rehabilitation interventions of the local and provincial road network. The interventions may include technical works to complementary infrastructures (including bridges) that have suffered damage and need to be repaired;

• Interventions to restore public buildings, including public houses and health centres.

The investment shall not foresee the installation or replacement of gas boilers, or the purchase of vehicles.

The investment is financed by Italy’s Recovery and Resilience plan by EUR 1534.4 million 2.1 whole

As part of the investmenti, these are interventions to restore the cliff along the right bank of the river Malone on which there is the Provincial Road number 39. The section of cliff in question, located in the municipal territory of San Benigno Canavese, was damaged during the flood event of 23-25 November 2019, causing an extensive collapse of the protective structure of the shore on which, as mentioned, there is the provincial road. 

The restoration activity will be implemented in two phases corresponding to as many technical solutions adopted for the consolidation and restoration of the lateral protection. In fact, for a first stretch of the cliff, proceeding from mountain to valley starting from the works carried out by the Municipal Administration of San Benigno, the existing work will be reinforced and consolidated by a structure that has the function of protecting the share of support of the concrete taglione now at an altitude incompatible with the quota reached locally by the sliding bottom of the active riverbed. 

This intervention is spread over a 20-metre stretch, equal to the length of the sector in which the taglione still shows suitable structural conditions, provides for the construction of a cliff in cyclopean stone blocks, clogged with concrete, leaning against the existing protective work and with a support height of 1.50 meters below the point of the lowest bed. The cross-section of the reinforcement structure will be 8.78 m³ for each linear meter of structure and has the function of under founding the current structure.

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