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Follow-up actions

 

The wind farm off the Bay of Saint-Brieuc, carried by Ailes Marines, obtained on 18 April 2017, from the Prefecture of Côtes-d'Armor, the administrative authorisation known as "Autorisation Unique IOTA" under the provisions of Articles L.214-1 et seq. of the Environment Code.

This authorisation prescribes several measures for monitoring, reducing, compensating or accompanying the environment. The purpose of the follow-up measures is to monitor the evolution of the environment over time and to measure the impact of the wind farm on this evolution.

Visual monitoring of marine mammals and birds

During construction:

Disturbance due to noise
Habitat loss
Risk of mortality/injury due to noise
Noise communication masking for marine mammals
Photoattraction (increased collision risk + exhaustion) for birds

During operation:

Photoattraction for birds
Collision risk and barotrauma for birds
Ultrasonic disorientation for birds
Electromagnetic fields for marine mammals
Other effects on marine mammals negligible

The main objective of "visual" monitoring of marine mammals and birds is to determine the impact of the work and operation of the wind farm off the Bay of Saint-Brieuc on these groups. This monitoring will also help improve local knowledge.

Vessel observations are carried out by two observers simultaneously, each covering one side of a vessel and concentrating on a 300 m strip. A transect protocol is also deployed for high-definition aerial monitoring. Films taken during trips are analysed back on land.

map-follower-aerien
boat-tracking map

Planning and Status

Z

Measure currently in place

This monitoring measure will be put in place on several occasions:

Between March 2020 and March 2021 :

0 boat trips per month

Between March 2020 and 2025:

0 air travel per month

In the operational phase (after 2025) :

0 airplane ride every 5 years

Passive acoustic monitoring of marine mammals

During construction:

Noise disturbance
Loss of habitat
Risk of mortality/injury due to noise
Noise masking of communications

During operation:

 Electromagnetic fields for marine mammals
Other negligible effects

The objective of monitoring marine mammals "by passive acoustics" is to provide information on cetacean activity in the area of the offshore wind farm before construction (reference state), during the construction, operation and dismantling phases.

Seven acoustic stations are positioned at different locations in the study area, each recording high frequencies (porpoises, clicks) and low frequencies (low and medium frequency cetaceans, ambient noise). Two stations are positioned in the wind farm, and the five others are arranged in stars around the area at 10 and 20 km apart.

Registration is effective 33% of the time. Equipment maintenance is carried out approximately every 3 months and the data obtained is processed back to shore.

follow-up-acoustic-passive
^

Mammal tracking buoys

[

10 km around the buoys

V

Location area

V

10 km around the area of implantation

V

20 km around the area of implantation

Planning and Status

Z

Measure currently in place

This follow-up action will be implemented on several occasions:

- between March 2020 and 2024

pre-construction, construction and the first 2 years of operations

- 1 year follow-up (date to be defined)

half of the operating period

- 1 year follow-up (date to be defined)

the year before the wind farm was dismantled

- between March 2020 and 2024: pre-construction, construction and the first 2 years of operation phases

- 1 year follow-up (date to be defined): half of the operating period

- 1 year of monitoring (date to be defined): the year preceding the dismantling of the wind farm

Monitoring of breeding colonies

During construction:

Habitat Loss/Habitat Change
Photoattraction
Disturbance from Vessels
Risk of Collision with Vessels

During operation:

Risk of Collision
Habitat Loss / Modification

The objective of the measure is to improve knowledge of the breeding colonies in Saint-Brieuc Bay. This monitoring is not intended to replace the actions already carried out in the area, but to complement them in order to refine knowledge about local breeding colonies.

The scientific protocol setting out the technical modalities of the field actions was established jointly between Ailes Marines and local stakeholders (Bretagne vivante, GEOCA, Syndicat Mixte Grand Site Cap d'Erquy Cap Fréhel, and VivArmor). The coordinator for the implementation of the monitoring is the GEOCA. The site of the 7 Islands was rejected after exchanges with the LPO because it is already particularly well monitored and known.

All species of breeding birds are monitored, particularly Great Cormorants, Gulls, Storm-Petrels, Shearwaters, Alcids, Black-legged Kittiwakes and Terns.

Great Cormorant

Herring Gull

Storm Storm-petrel

Balearic Shearwater

Alcidés

Black-legged Kittiwake

Tern

In general, three types of monitoring were identified:

Once analysed, the data will be stored in a public database (ORA).

Monitoring will be carried out in five colonies: Fréhel, Verdelet, Bréhat, Plouha and Cézembre.

follow-nicheurs

Planning and Status

Z

Measure currently in place

Seven years of monitoring are planned, according to the following schedule:

2020

  • In the pre-construction phase 87% 87%

2022

  • In the construction phase 0% 0%

2024, 2025, 2026, 2034, 2044

  • In the operational phase 0% 0%

Monitoring the dispersion of alkid chicks

During construction:

Habitat Loss/Habitat Change
Photoattraction
Disturbance from Vessels
Risk of Collision with Vessels

During operation:

Risk of Collision
Habitat Loss / Modification

The objective of the measurement is to improve knowledge of the phenomenon of dispersal of adults and their chicks at sea, and to verify whether this dispersal is in the direction of the wind farm off the Bay of Saint-Brieuc.

The scientific protocol setting out the technical modalities of the field actions was established jointly between Ailes Marines and the local actors (Bretagne vivante and the Syndicat Mixte Grand Site Cap d'Erquy Cap Fréhel). Follow-up will be carried out :

The data from the observations are used in GIS and will enable the mapping of the location of the male-push duos along the transects travelled.

carte-cap-frehel

On land near Cape Fréhel

transects-suivi

At sea, for transects from the tip of Cape Frehel

Planning and Status

Z

Measure currently in place

Five years of monitoring are planned, according to the following schedule:

2020

  • In the pre-construction phase 87% 87%

2022

  • In the construction phase 0% 0%

2024, 2025, 2026

  • In the operational phase 0% 0%

Tracking of avifauna by ground radar

During construction:

Habitat Loss/Habitat Change
Photoattraction
Disturbance from Vessels
Risk of Collision with Vessels

As the offshore radar can only be operational when the wind turbines are powered up, onshore radar monitoring is set up before and during construction. Specific monitoring will be implemented to evaluate micro/macro avoidance and migration flows within the wind farm during the operation phase (see next sheet).

The main objectives of this monitoring of the avifauna by land radar are to evaluate potential changes in seabird behaviour due to the presence of the wind farm and to measure the migratory flow in order to better understand the importance of the passages in Saint-Brieuc Bay.

A radar system is therefore installed at the Cap Fréhel site (the point on the coast closest to the wind farm) during the two main bird migration periods (April and October). For each monitoring, the radar system (vertical and horizontal mode) continuously measures the migration flows and flight heights over a period of one week.

map-radar-terrestrial

Planning and Status

Z

Measure currently in place

This follow-up action will be implemented on several occasions:

0 times a year for 5 years

One week in October and one week in April each year (migration periods) during the pre-construction and construction phases.

Monitoring of avifauna by marine radar

During construction:

Effective habitat loss due to avoidance
Attraction by yard lights
Disturbance due to noise and boats

During operation:

Risk of collision
Photoattraction
Effective habitat loss due to avoidance
Disturbance due to noise and boats

The monitoring of avifauna by marine radar will be carried out using an automated radar/camera system, installed in the wind farm, allowing maximum coverage of its surface and good data acquisition. Vertical data provides information on the height of flight while horizontal data provides information on lateral trajectories/directions. Both information are important to see if the birds change their flying height, avoid the wind turbines laterally, enter and exit the wind farm directly.

The two main objectives are as follows:

It was initially planned to install a radar during the pre-construction, construction and first years of operation on a foundation, i.e. for 6 years. This is not feasible for technical reasons (no offshore platform or electricity before commissioning). In fine, Ailes Marines will install 1 terrestrial radar during the migration period for 4 years (pre-construction and construction) and 2 offshore radars for 2 years.

Currently Micro Shelter Solution is working for Ailes Marines on the definition of this system (location, type of radar, coverage, dual purpose navigation/avifauna, parameterization, maintenance, etc.) and it will be presented for information to the members of the SC.

suivi-radar-maritime

Two radars will be installed within the wind farm, one in the north on foundation no. 57, and the other one in the south. The location has yet to be validated in accordance with the technical constraints of installation, but it could a priori be foundation no. 9.

Planning and Status

Measure under development

This follow-up will begin when the wind turbines of the wind farm are commissioned and will last for 2 years during the operation phase of the wind farm.

Telemetric tracking of gannets

During operation:

Risk of Collision
Habitat Loss / Modification

The objective of the measure is to improve knowledge of the ecology of the Northern Gannet in the Bay of Saint-Brieuc. This monitoring is not intended to replace the actions already carried out in the area, but to complement them in order to refine knowledge about the local colonies.

Fieldwork will take place in Sept-Iles, but the data collected will allow detailed monitoring of their movements and fishing activities throughout the Channel. Adult Northern Gannets will be captured in Sept-Iles during the breeding season. They will be equipped with latest-generation electronic devices enabling detailed monitoring of their movements on a small and large scale, their flight altitudes and their frequentation of the project area.

This equipment will consist of :

fou-de-bassan
0 GPS recorders
0 geolocators
0 altimeters
0 in-car miniaturized cameras

This measure will be implemented through close collaboration between the Sept-Iles nature reserve and the CEFE-CNRS in Montpellier. This collaboration, which has been in place for several years, has made it possible to validate and refine all the protocols that will be used for this work, as well as all the logistical arrangements.

suivi-fous-de-bassan

The capture and departure of Northern Gannets will be carried out within the Sept-Iles reserve.

Planning and Status

Measure under development

Monitoring will take place over three years:

- one year under construction

2023

- two years at the start of operations

2024-2025

- one year under construction (2023)

- two years at the start of operations (2024-2025)

Each year, monitoring will take place over a three-month period, which includes two and a half weeks of data collection on Sept-Iles Northern Gannets (June) and two and a half months of preparation of fieldwork, data analysis and writing of the annual report (June - July - August).

Telemetric monitoring of alkids

During construction:

Habitat Loss/Habitat Change
Photoattraction
Disturbance from Vessels
Risk of Collision with Vessels

During operation:

Risk of Collision
Habitat Loss / Modification

The measure concerns the nesting Torda Penguins and Troil Guillemots of the Cape Frehel colony. The aim is to clarify the ecology of these two species and to learn more about the behaviour of these birds in relation to the construction and operation of the wind farm.

The objective is to equip 10 to 15 individuals of Penguins and Guillemots per year, for 3 years, with miniaturized electronic devices during the breeding period.
Fieldwork will take place at Cap Fréhel, with an immediate release of the birds on site as soon as the GPS is installed, then recapture a few days later for the recovery of the material. The data collected will allow detailed monitoring of their movements and fishing activities in the Gulf of Normandy Breton.

The following deliverables will be produced:

Data

A database of raw data and metadata.

Maps

Geo-referenced maps showing the routes of equipped birds.

Kernel spatial analysis

An estimate of the probability density function of bird positions at sea, area by area.

Temporal analysis

Analysis of bird activity phases in order to extract a map of birds' preferred foraging habitats.

Monitoring will be carried out in collaboration between the Regional Avifauna Observatory (ORA), Bretagne Vivante, the Caps syndicate and the University of Nantes.

carte-cap-frehel

The capture and departure of the Alcids will be carried out near the cliffs of Cap Fréhel.

Planning and Status

Measure under development

Monitoring will take place over three years:

- one year under construction

2023

- two years at the start of operations

2024-2025

- one year under construction (2023)

- two years at the start of operations (2024-2025)

The monitoring will take place over a period of several months, which will include data collection on the alkids of Cape Frehel as well as preparation of fieldwork, data analysis and the drafting of the annual report.

Benthos / water / sediment monitoring

During construction:

Resuspension from drilling discharge (turbidity)
Deposit of sedimentary particles
Crushing (presence of piles and protections, anchoring of ships, laying and protection of cables)

During operation:

Loss or modification of habitats
Degradation of water and sediment quality
Reef effect

 This multiple monitoring, comprising 3 distinct compartments, benthos / water / sediment is divided into 3 subparts:

A. Bio-evaluation of benthic macrofauna and geochemical characterization of sediments

This involves monitoring epifauna and endofauna around 4 stations, representative of the diversity of habitats present on the study site. Two stations are located on soft substrates, two on substrates considered hard. Each of these stations is composed of 4 substations, positioned along a gradient of potential incidence in the major axis of the current.

- Soft Substrates: Sampling using i) a standard bucket (0.1m2 ; 5 replicates) and ii) a towed video system for transecting. An average sediment sample will be collected for laboratory geochemical analysis.

- Hard Substrates: Making a 10' long fixed-point video sequence.

B. Water quality and water body monitoring

Seawater sampling on 1 station located in a central position of the wind farm's perimeter.
Sampling using a Niskin trigger bottle. The sample is taken at a single average depth.

C. Monitoring the impact of sacrificial anodes

Task 1: Quantification of anode corrosion products in the environment (seawater, sediments). This "task" (field/dosing) is fully integrated into the water quality, water body and sediment monitoring protocol.

Task 2: Assessment of the health and environmental risk induced by potential bioaccumulation mechanisms of aluminium and zinc.

The species monitored as part of this monitoring are the scallop (Pecten maximus), filter-feeding bivalve, whelk (Buccinum undatum), scavenging gastropod and the common pout (Trisopterus luscus), a predatory fish. The sampling effort for these species is the result of experimental fisheries carried out during the monitoring of the fishery resource.

follow-up-benthic-a
b-followup

Planning and Status

Z

Measure put in place

Follow-up will take place according to the following schedule:

- Benthic biocenosis monitoring in September

2020 à 2023

- Complete follow-up at the start of operations

2024 à 2026

- Punctual follow-up

every 5 years

- Monitoring of benthic biocenoses in September between 2020 and 2023,

- Full monitoring at the start of operations, from 2024 to 2026,

- Punctual follow-up every 5 years.

Monitoring of the fisheries resource

During construction:

Crushing (presence of piles and protections, anchoring of ships and the laying and protection of cables)
Resuspension of sedimentary particles and their deposition
Noise and vibration nuisance

During operation:

Habitat modification
Reef effect

The aim of this monitoring is to assess the impact of the construction and operation of the offshore wind farm and its connection on the fisheries resource (monitoring shared with RTE. To do this, the comparison between the reference state and the environmental monitoring carried out throughout the life of the project should make it possible to decide on the effects of the project on the fisheries resource.

Several follow-ups are implemented:

Experimental fisheries

Observed tides

Analysis of existing data

Specific monitoring of cuttlefish spawning

The list of species monitored goes beyond the regulatory requirements, has been validated with the Committee on Fisheries 22 and includes the following species:

  • Bentho-demersal species using a set trawl (soft substrate) and a Canadian trawl (hard substrate) ;
  • Large crustaceans in the crustacean trap or in the crustacean fillet ;
  • Bivalves other than scallops in the Hamon skip ;
  • Scalloping using a flap dredge (soft substrate) and a roller dredge (hard substrate) ;
  • Whelk in the locker;
  • Adult cuttlefish in the trap (onboard observations), as well as monitoring of spawning (laying of orin).

In addition to experimental fishing, onboard observation campaigns are carried out for most trades with professionals working in the Bay of Saint-Brieuc, and more specifically on sectors close to the site of the future wind farm and its connection. These campaigns (approximately 70 per year since the end of 2019) aim to obtain additional indicators.

The selection of stations was carried out in two stages:

  • Areas more or less close to the field were selected to assess the impacts of the work and the operation phase according to an impact gradient.
  • Specific stations have been defined within its areas in consultation with the CDPMEM22 (in particular on the basis of knowledge of fishing zones).
loca-type-ships

Location of the sampling stations for the free trawl (soft substrate) and Canadian trawl (hard substrate) and types of vessels used.

loca-file-crustaces

Location of shellfish net sampling stations

loca-bivalves

Location of sampling stations for bivalves at the Hamon dumpster

loca-csj

Location of scallop sampling stations with flap dredge (soft substrate) and roller dredge (hard substrate)

loca-bulots

Location of sampling stations for whelk in traps

loca-pointes-seiches

Location of Cuttlefish Spawning Sampling Stations

Planning and Status

Z

Measure put in place

The timetable for carrying out the mission was defined in consultation with the CDPMEM22 , which proposed target months for each species, based on professional practice. It should be noted that the months selected may vary, depending in particular on the weather, the availability of the fishing professionals with whom the service providers embark, etc.

Follow-ups are planned:

  • In September and February for bentho-demersal species
  • In October and November for spiders
  • In September for bivalves and scallops
  • In March and June for whelks
  • From March to June for cuttlefish

Monitoring by experimental tide began in September 2018 for the baseline before works, will continue during the construction phase between 2021 and 2023 and also the first 3 years of operation, i.e. from 2024 to 2026 and then every 5 years (years n+1, n+2, n+3, n+5, n+10, n+15, n+20, n+25).

Additional monitoring has been carried out since the end of 2019.

Reef effect monitoring

During operation:

Positive reef effect for pelagic and larval species
Positive reef effect for benthic species (scallops, bivalves, whelks, spiders and bentho-demersal fish)
Positive reef effect for soft and hard substrates

The aim of this monitoring is to evaluate the reef effect of the foundations and to analyse the appearance of non-native species and in particular a possible proliferation of the crepidule. Indeed, the foundations will constitute a new vertical support favourable to the colonisation of hard substrate species, which will have to be monitored. It is therefore proposed to monitor over time the dynamics of colonisation of the structures as well as the progressive evolution of the species.

Monitoring will be done using ROV and/or divers. The choice of the monitoring technique will depend on the regulations to be defined by the competent State services, in particular concerning the authorisation to dive or not within the wind farm.

7 foundations will be monitored and defined according to the nature of the substrates, distributed as follows:
- 2 foundations on medium sands, south of the siting area;
- 2 on gravel, in the centre of the siting area;
- 2 on rock, north of the siting area;
- The foundation of the electrical substation.

schema-effect-recif

Planning and Status

Measure under development

This monitoring will be carried out according to the following schedule: 

- For 5 years at the start of operations

2023 à 2028

- Punctual follow-up

every 5 years

- During the first 5 years of the operation phase (2023 to 2028)

- Once every five years thereafter.

Crepidule monitoring

During operation:

Crepidule proliferation

The objective of this measure is to monitor the risk of proliferation of crepidules by relay effect following the potential colonization of the foundations. Indeed, the larvae of invasive species, such as the crepidule, could find at the level of the foundations a support which would play the role of relay in the expansion of invasive species by proposing new substrates for their installation. A monitoring measure specific to the crepidule is therefore proposed in order to characterize their presence and the extent of colonization. In case of significant presence a negative effect would then be observed, provided that their presence on the foundations induces an expansion of the bank of crepidules in the Bay of Saint.

The results of monitoring the colonisation of the foundations (Reef Effect) will make it possible to identify the presence or absence of invasive species such as the crepidule. Also, based on the results, the specific monitoring of the crepidule will or will not be implemented.

The monitoring measures will consist of these 3 steps:

U

Step 1

Confirmation of the presence of crepidule larvae on the site and of the densities by conducting larvae sampling campaigns at the wind turbine site. It should be carried out between May and August, which is the assumed maximum period of egg-laying activity in the area.

Step 2

Following the results of this preliminary campaign, to carry out a sampling study of adult crepidules over a wider area (Saint-Brieuc Bay and its surroundings) in order to define the origin of the larvae present in the implantation zone.

Step 3

Conduct a larval dispersion model to evaluate the origin of the larvae (coupling with stage 2) and the potential destination of the larvae emitted on the site of implantation following colonization of the foundations by crepidules.

Planning and Status

Measure under development

This monitoring will be implemented once, over one year in the operating phase and may be renewed depending on the results.

Monitoring of chiropterans in the construction phase

During construction:

Attraction of bats by site lights

The methodology consists of equipping a ship and the Grand Léjon lighthouse with an acoustic system including an acoustic recorder, a microphone and a solar panel to power the system in order to evaluate and characterize chiropteran activity in the wind farm area and its surroundings. The objective is also to identify whether the site is a source of light attraction for chiropterans and in particular Nathusius' Pipistrelle.

The acoustic recorders that will be used will have the particularity of detecting ultrasound over a previously defined range of frequencies and recording them.

The parameters that will be searched will be :

A methodology similar to that used during the initial state will be implemented.

This will be done in partnership with Lighthouses and Beacons.

suivi-chiropteres-construction

Planning and Status

Measure under development

Monitoring will take place during the bat migration periods, that is, in spring and fall in 2021, 2022, and 2023.

Monitoring of chiropterans in the exploitation phase

During operation:

Danger of collision / barotrauma
Photoattraction

In the operational phase, 8 wind turbines will be equipped with acoustic recording stations (ultrasounds) in order to evaluate and characterize the activity of migrating chiropterans in the wind farm area.

One of the objectives of this monitoring is to provide information on the presence of the migrating Nathusius Pipistrelle in the offshore wind farm. The latter having been detected at the Grand Léjon lighthouse but never in the area of the wind farm.

This monitoring will also provide information on whether the operating wind farm is a source of light attraction for chiropterans.

For this purpose, 8 wind turbines will be equipped with acoustic (ultrasound) recording stations. These stations are distributed around the periphery of the wind farm (see figure below).

Eight acoustic recording stations will be distributed on the peripheral wind turbines within the wind farm. Positions 50, 61, 47, 38, 12, 3, 4 and 25 are currently preferred.

suivi-chiropteres-exploitation

Planning and Status

Measure under development

This monitoring will be the continuation of the chiropterical monitoring during the construction phase. It will also take place during bat migration periods, in the spring and fall. It will begin at the commissioning of the wind turbines of the wind farm and will last for 3 years during the operation phase of the wind farm, i.e. in 2024, 2025 and 2026.

Monitoring of fishing activities

Fishing activity in the Bay of Saint-Brieuc is an important part of the local economy. The objective of monitoring fishing activities is to evaluate the evolution of the fishing fleet and fishing practices, from an economic point of view, in order to determine the impact of the wind farm on this activity.

A similar study of fishing activities near the settlement area was conducted in 2013 as part of the Ailes Marine project.

The follow-up will include a study of the evolution of the fishing fleet (numbers, fleet structure, trades) in the Bay of Saint-Brieuc, as well as a study of fishing practices (fishing areas according to trades).

The data analysed to present the fleet in the Bay of Saint Brieuc and its surroundings will come a priori from the VALPENA tool and will group together :

  • Data concerning the maritime districts;
  • Data from the statistical rectangles.

The data will be based on surveys carried out in year "n" which, after processing, will provide cartographic and statistical information on fishing activities in year "n-1" by rectangle, within the Bay of Saint-Brieuc.

The definition of the contours of the measure is currently under discussion with the Comité des Pêches Maritimes et des Elevages Marins des Côtes d'Armor (CDPMEM 22). The protocol for this monitoring will be defined jointly between the CDPMEM22 and Ailes Marines.

Planning and Status

Measure under development

The protocol for the implementation of this measure will be defined in the course of 2020.

Monitoring of airborne noise in the threshing phase

During construction:

Noise in the air on land

The objective is to measure airborne noise on land during the construction phase during threshing operations. The same measurement points as in the initial state in 2015 will be considered, namely :

  • Point 1: Erquy
  • Point 2: Binic

Measurements will be made during the entire duration of a threshing phase and a few hours before and after using a sound level meter per measuring point including a preamplifier and a microphone.

The measurements will be carried out in accordance with :

The NF S 31-010 standard

on the characterization and measurement of environmental noise.

The draft standard NF S 31-114

on environmental noise measurements of wind turbines.
suivi-bruit-aerien

Planning and Status

Measure under development

Monitoring will be carried out during a ramming session during the construction period between 2021 and 2023.

Monitoring of turbidity during the construction phase

During construction:

Modification of water quality
Disturbance of halieutic and benthic species
Disruption of uses
Modification of water column transparency

The system is based on real-time environmental risk assessment and therefore focuses on the most immediate effects of pile drilling. Above all, it has a warning function that aims to interrupt or reduce the effects before they produce impacts.

Three levels of Suspended Matter Concentration (SM) alert will be considered :

First alert level: enhanced vigilance threshold

Values greater than or equal to 20 mg/L but less than 50 mg/L.
If this threshold is reached, a reinforcement of the control by the acquisition of specific data (at least turbidity, pH, continuous chlorophyll, TSS analysis) will be triggered.

Second alert level: adaptation threshold of the work

Values greater than or equal to 50 mg/L but less than 100 mg/L. If this threshold is reached, monitoring will be reinforced and the intensity of the work may be reduced (reduction of drilling pressure).

Third alert level: work stoppage threshold

Values greater than or equal to 100 mg/L. If this threshold is reached, work will be temporarily suspended.

Measures to stop or reduce the work will remain applicable until the TSS concentration level has fallen below 20 mg / l. Measurements will be taken 1.5 metres below the surface and 3 metres above the seabed.

Monitoring will be in accordance with the requirements of the Prefectorial Order specific to turbidity.

Planning and Status

Measure under development

The turbidity measurement stations will be positioned at least two months before the start of work, for a test phase, and will then measure turbidity continuously during the installation of the foundations of the offshore wind farm's wind turbines.

Photomontage after construction

The objective of this measure is to validate that the photomontages presented as part of the impact study were representative of reality once the wind farm was installed.

Photographs will be taken at the locations selected for the photomontages as part of the project. Just as during the realization of the photomontages, for several points of view, variants will be made:

  • Variations according to weather conditions;
  • Variations illustrating the perception of the project at night if possible.

The photographs will be compiled in a report and presented to the local authorities as well as to the members of the SMC. They will be taken at the following locations: 

  • From the island of Brehat to the Peacock Point
  • From the Saint-Michel beach in Erquy
  • From the peak of Plouézec
  • From the D34 to the Pointe de la Guette in Plevenon
  • From the beach of Saint-Quay-Portrieux
  • From Beauport Abbey in Paimpol
  • From the dike of the Rosaires beach in Plérin
  • From Port Moguer to Plouha
  • From the beach of Pléneuf-Val-André
  • From the rue de la Mer in Plérin
  • From the beach of Saint-Pabu in Erquy
  • From the bottom of the bay from Saint-Brieuc to Langueux
  • From Cape Erquy
  • From the port of Binic
  • From the Sables d'Or beach in Fréhel
  • From the point of the Trinity (the Cross of the Widows in Ploubazlanec)
  • From the D34 towards the chapel of San Sebastian de Pléhérel
  • From Saint-Briac-sur-Mer
  • From the countryside west of Plévenon
  • From Elizabeth Castle in Saint-Helier
  • From the Cap Fréhel lighthouse (Restaurant)
  • From Bon Abri à Hillion Beach
  • From the Cap Fréhel lighthouse (Parking)
  • From Talbert's furrow to Pleubian...
  • From the top of the Cape Frehel lighthouse...
  • From the Mont-Saint-Michel_terrase west of the abbey
  • From the dungeon of the Fort de la Latte
  • From the tip of the Meinga at Saint-Coulomb
  • From the tip of Saint-Cast
  • Facing Erquy
  • From Holland's stronghold in Saint-Malo
  • Saint-Cast-le-Guildo
  • From the tip of Corbière on the island of Jersey
  • Off Fréhel
  • From the tip of Plouha
  • South of the wind farm
  • From the beach of Saint-Enogat in Dinard
  • NW of the wind fam
  • From the Pointe de la Garde Guérin in Saint-Briac-sur-Mer
  • Big Leo
  • From the D786 at Bellevue, in Erquy
  • Harbour Island
  • From Pointe de Pléneuf to Pléneuf-Val-André
  • Jersey Ferry Route

The plan for locating the points of view of the photomontages made during the impact study will be used identically to make the new photographs, using the same type of camera.

Planning and Status

Measure under development

Realization after construction of the wind farm, in 2024.