Power supply to Vlieland Island, Waddenzee

Nuon has the intention to stop the local generation on the island Vlieland and to provide a connection to the electricity grid on the mainland. After comparison of a number of alternatives, including a cable connection from the island Texel, it was decided to supply the island with power from Harlingen located on the coast of Friesland. Lievense was assigned to work out this plan and provide an environmental effect report to derive the most environment friendly solution. The assignment included the following:

Investigation of four aspects:
- a-biotic: physical aspects of water and soil, dynamic behaviour sea bottom
- biotic: flora and fauna, marine and mainland
- surroundings aspects and interaction
- installation and costs regarding construction, control and maintenance

Preliminary design with a comparison of routes including required depths and excavation methods.

Detailed design with an elaboration of the selected routes and with proposals to avoid or limit the negative effects or to take mitigation measurements.

During the assignment extensive consultations were held with representatives of several governmental and non-governmental organisations.

Activities:

• investigation of surroundings
• installation and costs
• preliminary and detailed design
• comparison of alternatives
• environmental effect report
• communication with concerning parties
• contract documents and cost estimate
• morfo-dynamic investigation