The Secchione hydroelectric power station is located in the municipality of Chiesa in Valmalenco in the Province of Sondrio and taps into the waters of the stream of the same name, a right tributary of the Mallero stream at 1,472.85 m.a.s.l. to the collection work at 1,054.70 m.a.s.l., the restitution point of the turbine waterfeed.
The plant consists of a waterbed intake at the foot of the Alpe Pirlo waterfall, with a water outtake, settling tank and surge tank, situated to the left side and allows the conveyance of the waters with a maximum capacity of 377 l/s, which occurs thanks to an underground discharge channel with a diameter of 500 mm and a length of 988.95 m.
The entire layout of the penstock extends to the right bank.
The main building, located in Dosselli at 1,057.40 m.a.s.l., is constructed entirely of reinforced concrete while the exterior aboveground parts are covered in stone and wood.
The machine rooms, the control panel room and the local transformers are housed inside.
A single Pelton turbine-generator group was installed, which produces an average of 3.5/4 Mw annually, with a nominal drop of 416 m.
The restitution of the turbine waterfeed to the Secchione stream occurs thanks to an underground PVC pipeline, which from the main building reaches the streambed.
The delivery and connection to the national network of the electrical energy produced involved the implementation of a 60-meter electrical line.
The contract involved all the phases of the planning/definitive/executive and the supervision and accounting of the job with the exception of the planning regarding the aspect relative to the dimensioning of the electromechanical works. Particular attention was given in the study of the architectonical elements and in the environmental insertion of the main building; the same attention was also given in the choice of optimal solutions for the migration techniques of the penstock.