Pelagian were contracted to provide permitting and regulatory services to a major International Cable System project, working on behalf of the cable installer and system owners.
The work scope consisted of data gathering for countries in Europe, the Mediterranean and the Far East segments of the cable system.
Challenges included the negotiations with French authorities on landing point selection and the crossing of areas of Posidonia Seagrass and sensitive negotiations in Thailand where the cable is planned to pass through a protected area. These negotiations informed both government and the cable owners of the specific requirements to minimise environmental impact to achieve a successful cable route.
Case Study: Gwynt Y Mor Cable Engineering and Data Management Services
Pelagian were contracted to provide detailed route engineering and cable burial risk assessment advice for the Gwynt Y Mor offshore wind farm project. This involved working with both the developer and cable installation companies to provide expert analysis of the seabed hazards for cable routes and wind turbine generator (WTG) foundations.
Project work included the collation of 10 years of geophysical survey data into a unified geospatial dataset, which was used to inform the export and array cable route planning and also construction phase works.
Pelagian’s knowledge of the project and expertise in handling this geospatial data greatly assisted in the planning of WTG construction and cable lay operations, while forming the basis for the developer’s own geographical information database and marine management systems.
Case Study: Java Bali Power Cable Route Engineering
Pelagian was contracted to provide expert cable route engineering services for the planned installation of two 5km long power cables between the islands of Java and Bali in Indonesia.
Project work included the geospatial data management of detailed high resolution seabed bathymetry and associated seabed images to determine the location of the existing power cables and plan the routes of the new cables.
The routes proved to be very challenging, with steep rocky slopes reaching depths of 80 metres. The cables were planned to avoid suspensions and sharp rock outcrops so that they could be rock dumped after lay. Pelagian provided an expert analysis of potential cable spans to assist in the cable lay.
