Atel Transmission Ltd. removes cable scrap from the River Aare

Excavator on floating container retrieves 520 meters of high voltage cable

Olten, (PresseBox) - From 10 June 2009, on behalf of Atel Versorgungs AG (AVAG), Atel Transmission Ltd. will retrieve two, more than 50 years old, high voltage cables from the bed of the River Aare near Rankwaage near the village of Winznau (Canton of Solothurn). The work will be carried out using an excavator mounted on a 100 ton floating container. The removal will take several days and is being carried out to protect the environment.

The excavator on the floating container will retrieve the cables piece by piece from a depth of some four to six metres. Subsequently the cables will be cut up and disposed of. "This is the first time that we have done something like this", says the Project Manager Georg Müller from Atel Transmission Ltd. "We do not know exactly how deep the cables have been buried by the sediment transport on the river bed. Hence it is still uncertain how much time we will need."

The two 16 kV high voltage cables that lead to the old Rankwaage substation, have been lying in the River Aare since 1958. One cable is 380 metres in length, 73 millimetres thick and runs in loops upstream in the Aare. The other is 140 metres long, 98 millimetres in diameter and runs parallel to the Gösgerstrasse Bridge. Together, both cables weigh approximately 4,000 kilograms. With the building of the new substation between the Rankwaage Bridge and the weir, and the reconstruction of the Hauenstein railway bridge in 2008, AVAG laid cables on the bridge and the old cables were hence taken out of service.

Alpiq Holding Ltd.

Alpiq Holding AG is the leading Swiss energy trading company and the largest energy services provider with European orientation. The Group was formed at the beginning of 2009 through the merger of the two energy pioneers Atel Holding AG and Energie Ouest Suisse SA (EOS). In 2008, more than 10 000 employees in 26 countries generated a consolidated annual turnover of around 16 billion Swiss francs. Alpiq is active in the fields of electricity generation and electricity transmission, in energy sales and trading, as well as in energy services. The company is responsible for about one third of Switzerland's electricity supplies. Further information about Alpiq under: www.alpiq.com

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