Leonhard Nilsen & Sønner AS – the mining- and tunnelcontractor ...

Svalbard Global Seed Vault.
3.1.5 Ore handling, Narvik
Employer: LKAB
Type of project: Ore handling and cleaning of the
transport system
Location: Narvik Harbour
Realisation period: 1981 – 2009
Form of contract: Principal construction contract
Description of project: Handling of ore and construction work.
Loading of ships. Transporting approx. 15 – 20 million tonnes
of iron ore per year.
3.1.6 Mining operations, Svalbard
Employer: Store Norske Spitsbergen
Grubekompani A/S
Type of project: Logistics services and development
Location: Svea – Spitsbergen, Norway
Realisation period: 2000 - 2020
Description of project: Svea is located at approximately 78
degrees North (latitude) and is isolated due to ice conditions
for 7 – 8 months of the year. This requires extensive planning
work to get all the equipment and goods in place before it
freezes. The storage costs are considerable. Performs road
construction, construction of storage facilities, quay facilities,
overnighting, offices, infrastructure services in Svea, fire
and rescue services. Transport of approx. 4 million tonnes of
coal per year and equally as much loading of coal on to ships.
Transportation of approx. 2 million m 3 uncompacted material.
Complicated project located near the North Pole.
3.1.7 Svalbard Global Seed Vault
Employer: Statsbygg on behalf of the UN
Type of project: Tunnels and mountain halls
Location: Longyearbyen - Spitsbergen, Norway
Realisation period: April 2007 – February 2008
Description of project: Construction of the world’s largest
warehouse for storage of seed. The rock caverns are driven
into the permafrost so that the seed will have an even storage
temperature (-18 degrees Celsius.). This is the new strongroom
that will protect seed from useful plants from over the
whole world. It is because of the isolated location and the
permafrost that the seed store is located at Spitsbergen. The
location takes into consideration all the known scenarios for
elevation of the sea surface because of global climate changes,
plant diseases, nuclear war, infestation, and natural disasters
as, for example, meteorite collision. Complicated project with
difficult geology. Extensive international attention.
3.1.8 Antarctic
Employer: SvalSat/Kongsberg Satelite station
Type of project: Laying foundations – logistics
Location: Troll Station - Antarctic
Realisation period: 2004 - 2011
Description of project: LNS performs foundation and trenching
work, road building and construction of satellite antennas
in the vicinity of the Norwegian research station Troll. The
company also participates in maintenance of the airport as
well as transport of cargo from the ice edge and in to Troll.
The logistics for the project are very complicated and there
are strict environmental requirements for all parties.
3.1.9 Rana Gruber AS
Employer: Rana Gruber As
Project: Galleries
Location: Mo i Rana, Norway
Realisation period: November 2007 – November 2009
Description of project: Leonhard Nilsen & sønner AS have the
principal construction contract for construction of a new main
level for Rana Gruber AS iron ore mine in Ørtfjell in Rana. The
work includes opening of approximately 6000 metres of galleries
(approx. 177 000 m 3 rock) and rock caverns (approx. 18
000 m 3 ). Ore shall be tipped into crushers and waste rock shall
go to waste rock landfills. The galleries are under existing quarries
with extensive rock stresses requiring heavy rock support.
3.2 Reference lately projects
3.2.1 Svea tunnel, Svalbard
Employer: Store Norske Spitsbergen Kullkompani
Type of project: Tunnel
Location: Svea - Spitsbergen, Norway
Realisation period: October 2002 – February 2004
Form of contract: Total construction contract
Description of project: 6500 m of access tunnel to the mine
Svea Nord. In the tunnel shall be installed a conveyor belt
for transport of coal. Complicated project with a very short
construction period, complicated geology and difficult logistics.
Svea is isolated because of ice conditions for 7 – 8 months
of the year. Demands vast and extensive planning. A world
record was set with driving 150.1 m/week with extensive bolt
reinforcement and concrete spraying. Average driving was
105 m/week.
3.2.2 Underground mine - iron ore, Sydaranger
Employer: Sydvaranger
Type of project: Development of a new main level
Location: Kirkenes, Norway
Realisation period: 1992 - 1995
Form of contract: Mining construction contract – unit
price contract
Value NOK: 200 million
Description of project: Alteration of iron ore mine from
surface quarry to underground operations. Drifting of approx.
3500 m transport gallery with a cross-section of 105 m 2 .
Very extensive rock stresses with stability problems requiring
very heavy rock support. In addition approx. 3000 m drilling
and loading galleries were drifted with the tunnel cross-section
of 35 m 2 . Training of personnel from the mining company
Sydvaranger.
3.2.3 Mining operations, Ballangen
Employer: Nikkel og Olivin AS
Type of project: Underground operations, mine
Location: Ballangen, Norway
Reaslisation time: July 1989 – October 2002
Form of contract: Mining construction contract - unit
price contract
Value NOK: 70 million per year
From open pit mine to underground mine for Sydvaranger. LNS in the Antarctic.
Difficult rock condition on Iceland.
Description of project: 800 000 tonnes of nickel ore per year
400 000 tonnes of waste rock per year. The mine was among
the most efficient of its kind in the world calculated in tonnes
per employee.
3.2.4 Almannaskard tunnel, Iceland
Employer: Vegagerdin
Type of project: Road and tunnel
Location: Höfn, Iceland
Realisation period: March 2004 – June 2005
Form of contract: Joint Venture – unit price contract
Value ISK: 800 million
Description of project: Driving of approx. 1100 m tunnel with
a cross-section of 47 m 2 , construction of approx. 3.5 km road
and 165 m tunnel portals. Performance of the contract was as
a Joint Venture in co-operation with the Icelandic contractor
Heradsverk Ehf. The geological circumstances were complicated
with alternating basalt, scoria and tuff. This demanded
constant changes of rock support and extent. LNS set a new
Icelandic record under tunnel driving med 106 m/week.
3.2.5 Hem tunnel, E18, Tønsberg
Employer: Public Roads Administration
Type of project: Tunnel
Location: E18, Solerød
Construction year: 2004
Realisation period: Approx. Sept. 2006
Form of contract: Sub-contract
Value NOK: 95 million
Description of project: Two tunnels of 950 m. Tunnel crosssection
approx. 71 m 2 . Installation complete with water and
frost protection.
3.2.6 Korgentunnel
Employer: Public Roads Administration
Type of project: Tunnel and road construction
Location: Korgen, Norway
Form of contract: Principal construction contract
Value NOK: 193 million
Description of project: Construction of 5800 m of the 8600
m long Korgen tunnel. Tunnel cross-section approx. ca. 63 m 2 .
Road construction approx. 4 km. Installation complete with
water and frost protection.