Key activities mitigating impact on landscape and environment:
- Choice of an optimal time window for construction works at the gas pipeline landfall, so that the inconvenience associated with carrying out the works during the holiday season is mitigated.
- Route optimisation – bypassing submarine objects and places of special environmental and touristic value.
- Protecting the gas pipeline against damage – for example, by laying it under the seabed in especially sensitive places.
- Constructing the pipeline landfalls without trenching on the beaches and dunes (horizontal drillings or microtunneling).
- Limiting the area excluded from shipping to the places of actual pipeline laying operations only.
Microtunneling – a trenchless method
The landfall will be constructed with the trenchless microtunneling method. It has been selected as the preferred solution, taking into account such technical aspects as the pipeline diameter and geotechnical parameters of the soil, to protect the coastal environment and minimise impact on the nearshore area and the beach . Tunnel Boring Machine (TBM) with fully rotary cutting shield will be used to drill the opening. As the boring progresses (starting from the launch shaft), sections of concrete pipe will be pushed into the opening to form a permanent tunnel casing. The method is called “pipe jacking”.