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REGISTRO ITALIANO DIGHE

Ufficio Periferico di Cagliari

versione italiana


 

Chiotas Dam

 

 

Country

Italy (Piemonte)

River

Gesso Torrent

Reservoir

Chiotas Lake

Dam type

Chiotas Lake is obtained by the construction of two dams:

- Chiotas Dam, of the concrete arch-gravity type;

- Colle Laura Dam, of the concrete gravity type.

The second dam, of smaller sizes, has been built to close a lateral saddle; the spillway is located on the Colle Laura right bank.

Construction period

1974-1978

Structural height

Chiotas: 130 m; Colle Laura: 30 m

Gross storage capacity

30.2 Mm

Active storage capacity

27.3 Mm

Volume of the dam

Chiotas: 360,000 m; Colle Laura: 14,000 m

Maximum controllable water surface

1978.00 m a.s.l.

Maximum water surface

1979.00 m a.s.l.

Crest elevation

1980.00 m a.s.l.

Crest length

Chiotas: 230 m; Colle Laura: 70 m

Maximum discharge capacity

Spillway: 240 m/s;

Bottom outlet: 90 m/s;

Power plant: 8 x 16 m/s.

Nameplate capacity of the powerplant

1,184 MW. Entracque power station, located downstream of the Chiotas reservoir, houses nine reversible units, eight of which utilizing the Chiotas head. Each of the eight units has a capacity of 148 MW in generating mode and of 155 MW in pumping mode.

Notes

Entracque Luigi Einaudi power plant is the largest hydroelectric station in Italy. Its named after Luigi Einaudi (1874-1961), Italian economist and statesman, who served as the first President of the Italian Republic, between 1948 and 1955.

In addition to the 8 units utilizing the Chiotas head (between Chiotas and Piastra reservoirs), Entracque power station houses one other reversible unit on the Rovina head, between Rovina (1,528.00 m a.s.l.) and Piastra (956.00 m a.s.l.) reservoirs. The design capacity of this unit is 133.67 MW in generating mode and 124.94 MW in pumping mode.

 

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Ultimo aggiornamento: 4 agosto 2005