Porce III: Facts and figures

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27 February 2008

Construction start date	January 2006
Completion date	2010/2011
Total contract value	US$ 920 million
Contract 1	Dam and some tunnels, US$ 240 million
Contract 2	Powerhouse and some tunnels, US$ 209 million
Dam
Concrete faced rockfill dam
Height	151 m
Width at base	400 m
Crest length	426 m
Crest width	8 m
Fill	4.15 million m3
Tunnels
Diversion tunnel	98.4 m2 in section; 653 m long
Upper headrace tunnel	86.4 m2 in section, 12.3 km long
Lower headrace tunnel	86.4 m2 in section, 304 m long
Pressure shaft	83.3 m2 in section, 149 m long
Tailrace and restoration tunnel	90.8 m2, 828m5 m long
Adits	3 x 32.1 m2, totalling 1.87 km long
Power station
Hydrostatic head	322 m
	Four x 172 MW Francis turbines
Annual generation	3106 GWh

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