Documentation: Feasibility study on underground cable solution in Eberswalde
The route of the existing 220 kV overhead line already leads to Finow-Ost and the Brandenburg quarter of Eberswalde, fairly close to the built-up area. The new Uckermark line, with a high voltage level of 380 kV, should in principle be constructed on this existing route. There are only slight deviations in both residential areas, in order to create a greater distance between the route and the buildings.
After discussions with the city of Eberswalde, 50Hertz declared in 2011 that it was willing to research the conditions for an alternative realisation as an underground cable over a stretch of two kilometres. In February 2012, given the legal situation and the result of the feasibility study, 50Hertz decided to maintain the planned overhead solution. Here, 50Hertz documents the studies presented by CONSULECTRA, a consulting firm based in Düsseldorf, in April and August 2011.
50Hertz is aware that the published documents are fairly technical. In view of the need for transparency, we decided to make them public nevertheless. For clarity's sake, we would like to mention that two route variants of about two kilometres each were researched. The documents usually indicate the eastern variant with variant 1 and the western solution with variant 2. The study also includes a possible extension of the cable route beyond two kilometres. This option only concerns the western route variant and is sporadically indicated as variant 3 in the documents.
The feasibility study highlights a few examples of technical and topographic issues that need to be resolved for an underground cable solution. One distinct technical challenge is the crossing of the Finow canal. Another is the difficulty caused by old contaminated industrial sites or the ash dump north of the Finow canal. In the end, the feasibility study could not offer solutions to but only a shift of these problems.
More information on the planning assessment of the underground cable solution can be found in our press release of 7 March 2012. When cable solutions are concerned, the costs are often the subject of heated debate. 50Hertz would therefore like to point out that the considerably higher costs of the underground cable solution did not, in the end, influence the decision in favour of the overhead solution. For the approval of investment costs by the Federal Network Agency, cost efficiency is nevertheless a factor in the assessment. To illustrate: the usual costs for a single kilometre section of an overhead line amount to about one million EUR.