Karahnjukar
Kárahnjúkar National Park
Landsvirkjun is of the opinion that the power project and a national park in the area on the north side of the Vatnajökull glacier do not exclude each other. Hydroelectric projects and national parks are operated side by side in many areas of the world. On the contrary, the project and it's Operation at the outskirts of a protected area or a national park can establish better conditions for the Operation of a protected area.
Iceland - Island Iceland - Island Iceland - Gufudalur
Iceland - Island Iceland - Island Iceland - Island
New roads in the project area provide easier access to the highlands in the Snaefell area and connect the areas on the east side and the west side of the glacial rivers. The Operation of the Kärahnjükar Power Station also ensures access to the area for a longer period of the year.
Iceland - Island Iceland - Island  Iceland - Island 
Iceland - Island  Iceland - Island  Iceland - Island 
Landsvirkjun builds the Kárahnjúkar Hydroelectric Project
The Kárahnjúkar Hydroelectric Project harnesses the two glacial rivers Jökulsá á Dal and Jokulsá í Fljótsdal. Installed power is 690 MW, maximum flow is 144 m3 pr. second and the annual generating capacity is 4,460 GWh pr. Year. Jökulsá á Dal is dammed at Fremri Kárahnjúkar with three dams. The largest one, Kárahnjúkastifla dam is at the southern (upper) end of the Hafrahvammar canyon, about 730 m long and 190 m high.

This dam is a concrete faced rockfill dam (CFRD), and will be among the highest in the world and the highest in Europe of this type. Two smaller saddle dams will be built at Kárahnjúkar, Desjarárstífla dam on the east side and Saudðárdalsstífla on the west side. These dams will be of the type rockfill dams with earth core. The three dams form the main storage reservoir for the project, Hálslón, 57 km2. The water level at full reservoir is 625 m above sea level and the reservoir will reach the edge of the Brúarjökull glacier.

Jökulsá í Fljótsdal is dammed about 2 km downstream of the Eyjabakkafoss waterfall on the north side of the Eyjabakkar wetlands. The intake pond thus created has been named Ufsarlón. From the Hálslón reservoir, the water runs through a tunnel under the Fljótsdalsheiði moor to a juncture with another tunnel from the Ufsarlón pond. The water then runs trough one headrace tunnel north-east to an intake at the Valþjófsstaðafjall escarpment. Total length of headrace tunnels is 53 km. Two pressure shafts lead the water from the intake to the underground powerhouse. The total head at the project is 599 metres. The powerhouse contains six generating units, 115 MW each. Atailrace tunnel and a tailrace canal take the water to the course of the glacial river Jökulsá í Fljótsdal just east of the farm Valþjófsstaður at 26 m above sea level. The total length of tunnels is about 69 km. The headrace tunnels and parts of access adit tunnels will be drilled with three full face boring machines other tunnels will be excavated by drillig and blasting.
Electricity supply from the first generating unit started 2007 and a total completion of the project is has been in 2009.

Source: official board on site