Located in the hamlet of Megolo, in the municipality of Pieve Vergonte, at 220 m above sea level, the plant was commissioned in January 1941. It is a run-of-river power plant using water from the Toce River and part of the Anza River.
1. The intake on the Toce River is located in Prata, in the municipality of Vogogna, and features a dam originally made up of four gates, increased to six in the early 1990s at the request of the Po River Authority for hydraulic regulation, for a total width of 115 m.
The dam includes a fish ladder to facilitate fish migration.
2. The total water flow used is 75 m³/sec, including 64 m³/sec from the Toce River and 11 m³/sec discharged from the Edison Power Plant via the Anza River.
From the intake on the Toce River, a free-surface trapezoidal channel extends for approximately 4.95 km, with an average width of 15 m and a height of 4 m.
3. Approximately 600 m downstream from the intake screens, the channel includes three additional inlet gates to regulate the water flow into the Megolo power station.
4. FIRST TUNNEL – The first tunnel crosses the Anza River and is 500 m long, with a twin-barrel structure.
Around 1.5 km from the start of the intake channel, the discharge channel from the Edison Plant joins the flow.
5. SECOND TUNNEL – The second tunnel crosses the Arsa stream at the Rumianca site. It is 150 m long, and also features a twin-barrel design.
6. Water Intake at Megolo Power Plant – Before reaching the turbines, the water goes through four screens (two per turbine), each measuring 5.50 m high and 3.85 m wide. Each screen is kept clean by a dedicated rake system.
7. The power station is equipped with two vertical generator units, installed in 2010, each rated 5,400 kVA and operating at 9,000 V.
8. Two Kaplan turbines, each with a 3.75 MW power output, operating at 214 rpm, are coupled with the generators.
The maximum power output of the Megolo plant is approximately 6.5 MW. Each unit handles a 37.5 m³/sec water flow with an effective head of 10.85 m.
The discharge channel from the plant is approximately 1.5 km long, and returns the water to the Toce River.
The electricity generated is conveyed to the industrial site via an overhead double-circuit line, operating at 9,000 volts, with a length of approximately 2.8 km.
