Amprion GmbH operates one of the longest high-voltage transmission networks in Germany. Amprion Offshore GmbH is specifically responsible for the construction, operation, and grid connection of offshore activities. An overview of the overall grid connection concept is provided by Amprion at:
👉 https://offshore.amprion.net/Allgemein/Konzept/
After wind-generated electricity produced at sea is transported to the mainland via subsea cables, it is converted into alternating current at a converter station so that it can be fed into the 380 kV transmission grid. To transport the electricity through the transmission and distribution network to consumption centers, an expansion of onshore routes is required. This expansion is predominantly carried out using underground cable construction methods.
BalWin1 and BalWin2 are two grid connection systems that feed electricity from the North Sea into the German transmission grid. Further technical background information on BalWin1 and BalWin2 is provided by Amprion here:
👉 https://offshore.amprion.net/Projekte/BalWin1-BalWin2/
Commissioning of the systems is planned for 2030 and 2031. Preparatory measures are already underway to ensure smooth construction processes during the later construction phase.
Preparatory Measures with Relevance to Soil Protection
The preparatory measures include, in particular:
Ordnance Investigation and Clearance
- Surface detection using smaller equipment
- Borehole detection and excavation of confirmed suspect locations using larger construction machinery
Archaeological Investigations
- Assessment of potential soil and archaeological monuments
- Extensive interventions and excavation work
These activities are accompanied by soil-scientific supervision in line with the principles of preventive soil protection.
Role of Taberg Ingenieure GmbH – Member of the SIERA Alliance
Taberg Ingenieure GmbH – member of the SIERA Alliance – has been commissioned by Amprion Offshore GmbH to provide soil-scientific construction supervision (BBB) for planning approval sections 3, 4, and 5, covering a route length of approximately 61 km.
In addition to the preparatory measures, Taberg will also provide soil-scientific supervision during the subsequent construction phase. The soil-related tasks are carried out in close cooperation with Mull und Partner Ingenieurgesellschaft mbH Nord (OsnabrĂĽck office). This collaboration ensures continuous, professional support with sufficient personnel capacity and on-site presence.
Tasks of Soil-Scientific Construction Supervision (BBB)
The scope of services provided by the BBB includes, among others:
1. Site Inspections and Documentation
Before the start of measures, the relevant site and soil characteristics are documented and assessed.
2. Assessment of Soil Moisture
Soil moisture is a key factor for soil-protective implementation. The BBB assesses:
- Trafficability of soils
- Workability in accordance with DIN 19639
The results are continuously communicated to all project stakeholders.
3. Supervision During Execution
- Regular monitoring of construction activities
- Discussion of current topics during weekly construction meetings
4. Final Assessment
After completion of the measures:
- Determination of the soil condition
- Survey of any unavoidable land or crop damage (e.g. affected areas with cultivated crops)
Outlook on the Construction Phase
Earthworks for the installation of the cable protection conduit system are scheduled to begin at the end of 2026 and will also be accompanied by soil-scientific supervision by Taberg Ingenieure GmbH – member of the SIERA Alliance.
Would you like to learn more about soil-scientific construction supervision or the services offered by Taberg Ingenieure GmbH – member of the SIERA Alliance?
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