Burfell Extension Hydroelectric Project

ÍAV Marti Búrfell sf. started construction of the Búrfell 2 Hydro Power Plant in April 2016, with planned start of operations at the end of April 2018.

ÍAV Marti Búrfell sf. will execute the drilling and blasting of the access tunnel, tailrace tunnel and construction of the underground powerhouse where the power plant turbine is located. The intake structure will be constructed at the southern end of the Bjarnalón pond and from there a 150 meter high vertical shaft will be drilled into the powerhouse (the water head will be roughly 120 meters). The diameter of the pressure shaft is about 6 meters which at this height will result in a production of roughly 100 MW or 300GWh per year. 

The powerhouse will be located in a cavern, 300 meters inside the mountain Sámstaðaklif and roughly 150 meters below Bjarnalón pond. A steel pipe located between the intake structure and the powerhouse will be installed by the German company DSD NOELL Gmbh. An outlet tunnel will be constructed by drilling and blasting 450 meters out from the powerhouse, where the water will flow into a canal which will run for 2 km to Þjórsá River. 

As mentioned above the power output of the new power plant will be 100 MW with one turbine, however the design allows for an expansion of up to 40 MW. The producer of the turbine, which is a Francis, is the Austrian company Andritz Hydro Gmbh.

With the construction of Búrfell 2 the capacity of the electricity grid will be increased by as much as 300 GWh per year. The new power plant will utilize water which flows past the current Búrfell station intake. The increased capacity will help ensure reliable and flexible operation of the electricity distribution system.

The environmental impact of the hydro power plant is minimal since excess water from Bjarnalón pond, which is already utilised for the current Búrfell station, will not go to waste. The visual impact is non-existing since the powerhouse is constructed underground, out of sight.  

Main quatities:

Loose excavation      

745.000

Rip-rap

24.000

Rock excavation

175.000

Concrete formwork

23.000

Rock pre-split

27.000

Reinforcement

1.288

kg

Soil excavation

59.000

Embedded steel

27.500

kg

Underwater excavation of loose material

67.500

Steel construction

96.000

kg

Underwater rock excavation

26.000

Earth wire

4.500

m

Ditch excavation

1.000

Underground high voltage cable

9.000

m

Tunnel excavation

94.000

Cable channels

1.000

m

Sprayed concrete

6.500

Electric wiring and controls

78.000

m

Steel rock support in tunnel

23.500

kg

Water and sewage piping

3.500

m

Construction concrete

18.000

Ventilation ducts

1.100

m

Land fills

89.000

Landscaping

330.000

Road surface

34.000

 

Customer The National Power Company
Project start Apríl 2015
Project finish Summer 2018
Landsvirkjun´s consultants Verkís
Structural design Verkís
Client Supervision Mannvit
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