Rehabilitation of Sciaguana Dam

Sciaguana Dam was built between 1984 and 1992, and it is located between the municipalities of Agira and Regalbuto in the province of Enna. The destination of the reservoir is for irrigation use by the Land Reclamation Consortium 6 of Enna, which takes care of the management of the networks of the distribution to an area of 1665 hectares of irrigated fields. The dam is of the loose material type with a sealing core and has a straight structure and a trapezoidal cross section with a width of 9.00 m at the crown and 258.75 m at the base. The structure tests are still in progress and the relative operations started on 11/03/1997.

The project consists of the seismic inspections of the dam main structure body and ancillary works, geotechnical study, geognostic investigations, tests on reinforced concrete structures, drafting of the final and the detailed design, safety coordination during the design phase of the extraordinary maintenance works on the drains and embankments downstream of the Sciaguana Dam in the municipality of Agira (EN).

The analyses consist of the seismic evaluation of the dam and the ancillary works in light of the technical standards for dams (NTD 2014) and the technical standards for construction (NTC 2018). 

The following services are provided: the assessment of seismic safety, the execution of the geotechnical study of the dam with the consequent definition of the interventions to improve the structural conditions from the seismic verification and other related investigations. Final and detailed design and safety coordination during the design phase, for the extraordinary maintenance of the bottom outlet plants. 

The proposed seismic upgrading interventions mainly concern the reinforced concrete works and include for the various works the execution of tie-rods, piles, hooping, reinstatement of cover irons.