Press release
Strengthening environmental monitoring
during drilling work
Lézardrieux / Saint-Brieuc / Paris – April 28, 2021 –
During the first phase of drilling work which takes place from May to October 2021 in the northern zone of the perimeter of the Saint-Brieuc park, Ailes Marines is introducing reinforced real-time monitoring measures on noise and turbidity (turbid state of the water).
Strengthened turbidity control measures
During the drilling work on the anchor piles for the wind turbine foundations, Ailes Marines establishes real-time monitoring and monitoring of turbidity on 9 foundations in order to prevent any exceeding of the authorized thresholds.
These measurements relate to 3 foundations positioned on 3 different types of marine subsoil representative of the bay (outcropping rock, pebbles and rock blocks, sand and gravel).
These monitoring measurements are carried out by a monitoring network of 5 monitoring stations (buoys) which detect possible variations in turbidity.
Three alert levels set up by prefectural decree will be monitored by Ailes Marines , in order to limit the effects of drilling and pile installation work on the environment. Strengthened monitoring, a reduction in drilling speed, or a temporary cessation of work will be applied depending on the threshold exceeded.
Monitoring measures reinforced by noise
To contribute to improving knowledge of noise in the marine environment, Ailes Marines is continuing the studies carried out since 2018, by closely monitoring acoustics during the works phase, in order to confirm the impacts identified prior to the construction phase. as part of the impact study and the first tests in September 2020.
Continuous measurements will be carried out on the representative positions of 9 foundations.
They are part of the continuity of the scientific studies carried out by Dr. Laurent Chauvaud, research director at the CNRS, Pr. Frédéric Olivier from the National Museum of Natural History and Dr. Delphine Mathias and by Michel André, Professor at the Polytechnic University of Catalonia (UPC) and Director of the Bioacoustic Applications Laboratory (LAB).
New complementary measures
The choice to intensify these measures results from consultations carried out in recent weeks between all sea users, the Côtes d'Armor prefecture and the maritime prefecture.
These measures are in addition to the forty environmental measures included in the prefectural authorizations for the project and carried out by Ailes Marines .
About Ailes Marines
The key figures of the Saint-Brieuc Bay offshore wind project:
- 75 km2 of area
- 62 Siemens Gamesa SG 8.0-167 DD 8 MW wind turbines
- 496 MW of installed power
- 1,820 GWh/year of production, i.e. the annual electricity consumption of 835,000 inhabitants (heating included)
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