Ufficio Periferico di Cagliari

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Alpe Gera Dam




Italy (Lombardia)


Cormor Torrent

Dam type

Concrete gravity

Construction period


Structural height

174 m

Gross storage capacity

68.1 Mm

Active storage capacity

62.7 Mm

Volume of the dam

1,700,000 m

Maximum controllable water surface

2,125 m a.s.l.

Maximum water surface

2,126 m a.s.l.

Crest elevation

2,128 m a.s.l.

Crest length

528 m

Maximum discharge capacity

Spillway: 62 m/s;

Bottom outlets: 186 m/s.

Nameplate capacity of the powerplant

35 MW


Alpe Gera Dam is the highest concrete gravity dam in Italy, and one of the worlds highest of this type.

Since, in the solid-gravity dam, the concrete strength is generally higher then that prescribed by Italian specifications, the dam body was built using a low water-cement ratio concrete. In this way, it was possible to place the concrete by mean of trucks, in horizontal layers of limited thickness, covering the whole horizontal section of the dam. The dry, nonflowable nature of concrete, allowed to be sure that its characteristics would in no way be affected by trucks being driven over it only few hours after its placement. Transversal joints were made by cutting the concrete layers, while still soft, with a vibrating blade.

The fear that numerous horizontal joints might adversely affect the permeability of the structure, led to line the upstream face of the dam with 3-mm-thick steel panels.



Pagina creata da Luigi Ghinami email

Ottimizzata per una risoluzione 800x600 o superiore

Ultimo aggiornamento: 4 agosto 2005