Opening of the largest solar park in Rhineland-Palatinate

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Opening of the largest solar park in Rhineland-Palatinate / cable route Grenderich – Bremm (Eifel/Hunsrück) with IGR participation in planning and construction

In autumn 2024, ENERPARC AG opened the largest solar cluster (ground-mounted photovoltaic systems/solar park) in Rhineland-Palatinate. Consisting of nine systems, it has a total output of around 200 megawatts and can supply around 54,000 households with solar power annually. In order to connect the systems to the power grid, 11.5 km of cable routes were required.


IGR provided the following services for the cable route from summer 2021 to autumn 2024:

Planning/approval phase:
  • Accompanying landscape conservation plan including forestry compensation planning
  • Natura 2000 test
  • Overall environmental permit planning/scheduling
  • Avifaunistic mapping and species protection review of the entire route
  • six change permit applications (forestry/water rights) due to topography and land availability
  • Support in the technical planning process of civil engineering/route planning incl.
- Extensive basics/inventory research including owners
- Geotechnical investigation concept
- Site plans, cross profiles, variant studies
- Water law applications for extraction and discharge of Moselle water/layer water including effects according to the WFD and with regard to adjacent source areas
  • Crossing applications: 
- Moselle crossing, 1st order waters (2 parallel flushing boreholes of 200 m, DN 450)
- three 3rd order bodies of water (including nature conservation application for the entire road)
- three classified streets
- DB route

Construction phase:

  • Ecological construction support (ÖBB)
  • Surveying: Preliminary staking out of the line trench or the route/the working area at forced points as well as measurement of the realized route
Because of the steep slopes of the Moselle and side valleys (including Ankerbach with a height difference between 170 m and 270 meters above sea level, 2:1 - gradient / work with walking excavators and Moselhang-West with 930 m flushing borehole at 270 meters above sea level to protect forest slopes), the Crossing a busy shipping route, the location along the protective strip of a large gas pipeline as well as a variety of ecological and Species protection requirements (species-rich hay meadows according to § 30 BNatSchG, high proportion of forest/e.g. Natura 2000) made this project a challenge for everyone involved.

The entire solar park and the cable networks were successfully connected to the grid in autumn 2024.

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Carlo Hahn/Daniel Heintz/Daniel Raudonat