Table 1

1 January 2000

Table 1: The Krahnjkar hydro scheme in figuresSource: Landsvirkjun

Installed capacity	690MW
Generating capacity	Approx. 4,600GWh/year
Turbines	Francis, vertical axis
- Number	6
- Rated discharge per unit	24m3/sec
- Rated output per unit	115MW
Total head	599m
Rated discharge (maximum discharge)	144m3/sec
Average discharge	110m3/sec
Hlsln reservoir
- Area of full reservoir	57km2
- Length of reservoir	25km
- Live storage	2,100Mm3
- Reservoir full supply level (FSL)	625m asl
- Reservoir minimum operating level (MOL)	575m asl
- Hlsln reservoir catchment area	1806km2
- Average inflow to Hlsln reservoir	107m3/sec

Krahnjkastfla dam
- Maximum dam height	193m
- Dam length	730m
- Fill materials	8.5Mm3

Desjarrstfla dam
- Maximum dam height	60m
- Dam length	1100m
- Fill materials	2.8Mm3

Sau_rdalsstfla dam
- Maximum dam height	25m
- Dam length	1.100m
- Fill materials	1.5Mm3

Ufsarln pond
- Area of full reservoir	1km2
- Maximum water level	625m asl.
- Ufsarln pond catchment area	430km2
- Average inflow to Ufsarln pond	31m3/sec

Ufsarstfla dam
-Maximum dam height	37m
- Dam length	620m
- Fill materials	0.6Mm3

Keldurln reservoir
- Area of full reservoir	7.5km2
- Reservoir full supply level (FSL)	669m asl
- Live storage	60Mm3

Keldurstfla dam
- Maximum dam height	26m
- Dam length	1,650m
- Fill materials	0.8Mm3

Tunnels	Approx. 72km
Headrace from Hlsln (dia: 7.2-7.6 m)	39.7km
Headrace from Ufsarln (dia: 6.5 m)	13.3km
3 adits to headrace (dia: 7.2-7.6 m)	6.9km
2 diversion tunnels and adit at dam	2,4km
Grouting galleries at dam	0.5km
Surge tunnel (dia: 4.5 m)	1.7km
2 diversion tunnels Hraunaveita (dia: 4.5 m)	3.7km
2 vertical pressure tunnels (dia: 4.0 m)	0.8km
Access tunnel to power station (dia: 7.5 m)	1km
Tailrace tunnel (dia: 9.0 m)	1.3km
Cable tunnel (dia: 4.0 m)	1km

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