Entracque Power Plant

Entracque Power Plant
The Chiotas Dam
Official name	Centrale Idroelettrica Entracque
Country	Italy
Location	Entracque
Coordinates	44°13′29″N 07°23′10″E / 44.22472°N 7.38611°E / 44.22472; 7.38611
Status	Operational
Construction began	1969
Opening date	1982
Owner(s)	Enel
Upper reservoir
Creates	Chiotas Plant: Lago del Chiotas Rovina Plant: Lago della Rovina
Total capacity	Chiotas Plant total:30,200,000 m3 (24,484 acre⋅ft) Chiotas active: 27,300,000 m3 (22,132 acre⋅ft) (active (usable)) Rovina: 1,200,000 m3 (973 acre⋅ft) (active (usable))
Lower reservoir
Creates	Lago della Piastra
Total capacity	Total: 12,000,000 m3 (9,700 acre⋅ft) Active: 9,000,000 m3 (7,300 acre⋅ft)
Power Station
Hydraulic head	Chiotas: 1,048 m (3,438 ft) Rovina: 598 m (1,962 ft)
Pump-generators	Chiotas: 8 x 148 MW (198,000 hp) Francis-pump turbine Rovina: 1 x 133.67 MW (179,250 hp) Francis-pump turbine
Installed capacity	Chiotas: 1,184 MW (1,588,000 hp) MW Rovina Plant: 133.67 MW Total: 1,317.67 MW (1,767,020 hp)
Annual generation	Chiotas: 1,040 GWh (3,700 TJ)

The Entracque Power Plant, also known as The Upper Gesso Plant, is a pumped-storage hydroelectric power station located in Valle Gesso just south of Entracque, Italy. The power station contains pump-generators for two co-located but hydraulically separated power schemes; the Chiotas-Piastra Plant and Rovina-Piastra Plant. Both plants use separate upper reservoirs but use Lago della Piastra as their common lower reservoir. To produce power, water is released from the upper reservoirs to the power station located at the lower reservoir. The pump-generators re-fill the reservoirs and the process repeats as needed. The Chiotas' upper reservoir, Lago del Chiotas, is located much higher in the valley and larger than Rovina's Lago della Rovina which affords it the ability to produce more electricity. The installed capacity of Chiotas is 1,184 megawatts (1,588,000 hp) with a hydraulic head (water drop in elevation) of 1,048 m (3,438 ft) while Rovina has an installed capacity of 133.67 megawatts (179,250 hp) and a head of 598 metres (1,962 ft). Construction on the plant began in 1962 and operations started in 1982. It is owned and operated by Enel.^[1]