Management Measures Tool for Marine Renewable Energy

Accessing Management Measures that support Deployment of Wave and Tidal Devices

As the MRE industry moves beyond deployment of individual wave and tidal devices towards arrays, there continue to be onerous monitoring requirements placed on device developers. Certain risks of MRE devices on the marine environment are not sufficiently well resolved to allow smooth transitions towards a commercial industry. As an example, the potential collision of marine animals with single tidal turbines continues to create concern for stakeholders and regulators in many jurisdictions.

In consultation with the research and regulatory communities, it was determined that having a set of robust management measures might act as safeguards for marine animals and habitats until such time as definitive monitoring data become available to determine the level of risk from turbines and WECs. At that point, mitigation measures could be dialed back or removed, if warranted.

With the input of the researchers, regulators, and developers at a workshop held May 9th 2017 in Glasgow UK, the following criteria were used to develop the management measures tool shown here:

  • Ensure common understanding of parameters that describe management measures proposed for collision risk, EMF, noise, and benthic disturbance;
  • Evaluate each measure for effectiveness in addressing the risk for which it is intended;
  • Determine the feasibility and practicality of each measure;
  • Facilitate the development of a toolbox of management measures that can be made broadly available, as they are needed; and
  • Consider the use of the tool to guide initial discussions between project proponents and regulators.

The tool can be explored using the following steps:

Technology Management Measure Category Phase of Project Stressor Receptor Specific Receptor Sort descending Interaction Specific Management Measures Implications of Measure
Tidal Design feature Installation Contamination Benthic All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Physical Containment systems including bulk heads, closed circuit systems, pressure relief systems.

Reduces risk of contamination escaping from structure.

Tidal Monitoring Installation Marine Non-Native Species (MNNS) Benthic All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Monitoring and reporting of MNNS.

Reduce/removes risk of transfer of non-native species.

Wave Mitigation Installation Contamination Birds All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Material selection - lubricants, coolants, hydraulic fluids etc. selected with low ecotoxicity levels and biodegradable.

Reduces/removes risk of contamination from materials which may have escaped structure. However, use of lower toxicity may compromise performance, or impact other technical issues (e.g. fluid changes).

Wave Compliance Operation & Maintenance Marine Non-Native Species (MNNS) Birds All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Adhere to appropriate measures when jettisoning ballast water.

Reduce/remove risk of transfer of non-native species.

Tidal Design feature Operation & Maintenance Contamination Fish All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Physical Containment systems including bulk heads, closed circuit systems, pressure relief systems.

Reduces risk of contamination escaping from structure.

Wave Mitigation Operation & Maintenance Marine Non-Native Species (MNNS) Fish All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Establish and implement a Biofouling Management Plan.

Reduce/removes risk of transfer of non-native species.

Tidal Compliance Installation Contamination Marine Mammals All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Management: Establish and implement a Contamination Control Plan / Ship Oil Contamination Emergency Plans (SOPEPs).

Compliance with International Maritime Organisation (IMO) and Maritime Coastguard Agency (MCA) codes for the prevention of contamination.

Reduces risk of any contamination event, ensures that contingency plans are in place and demonstrates compliance with environmental management systems.

Wave Mitigation Installation Marine Non-Native Species (MNNS) Marine Mammals All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Adhere to appropriate measures when jettisoning ballast water.

Reduce/remove risk of transfer of non-native species.

Wave Compliance Operation & Maintenance Contamination Reptiles All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Management: Establish and implement a Contamination Control Plan / Ship Oil Contamination Emergency Plans (SOPEPs).

Compliance with International Maritime Organisation (IMO) and Maritime Coastguard Agency (MCA) codes for the prevention of contamination.

Reduces risk of any contamination event and ensures that contingency plans are in place. Demonstrates compliance with environmental management systems.

Wave Mitigation Decommissioning Changes in sediment dynamics Reptiles All receptors

Reduced visibility impacting prey detection and obstruction avoidance.

Best practice methodologies to reduce resuspension of sediment during cable burial or device foundation / mooring installation.

n/a

Tidal Mitigation Installation Changes in sediment dynamics Habitat All receptors

Sediment disturbance disrupting water clarity that results in smothering of fish spawning grounds.

Best practice methodologies to reduce resuspension of sediment during cable burial or device foundation / mooring installation.

n/a

Wave Mitigation Installation Marine Non-Native Species (MNNS) Reptiles All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Adhere to appropriate measures when jettisoning ballast water.

Reduces/removes risk of transfer and settlement of non-native species.

Tidal Compliance Installation Marine Non-Native Species (MNNS) Habitat All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Adhere to appropriate measures when jettisoning ballast water.

Reduce/remove risk of transfer and settlement of non-native species.

Wave Compliance Decommissioning Contamination Habitat All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Management: Establish and implement a Contamination Control Plan / Ship Oil Contamination Emergency Plans (SOPEPs).

Compliance with International Maritime Organisation (IMO) and Maritime Coastguard Agency (MCA) codes for the prevention of contamination.

Reduces risk of any contamination event and ensures that contingency plans are in place. Demonstrates compliance with environmental management systems.

Wave Compliance Operation & Maintenance Contamination Benthic All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Management: Establish and implement a Contamination Control Plan / Ship Oil Contamination Emergency Plans (SOPEPs).

Compliance with International Maritime Organization (IMO) and Maritime Coastguard Agency (MCA) codes for the prevention of contamination.

Reduces risk of any contamination event and ensures that contingency plans are in place. Demonstrates compliance with environmental management systems.

Wave Mitigation Operation & Maintenance Marine Non-Native Species (MNNS) Benthic All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Source vessels locally.

Reduce/remove risk of transfer of non-native species.

Tidal Mitigation Operation & Maintenance Contamination Birds All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Management: Establish and implement a Contamination Control Plan / Ship Oil Contamination Emergency Plans (SOPEPs).

Compliance with International Maritime Organisation (IMO) and Maritime Coastguard Agency (MCA) codes for the prevention of contamination.

Reduces risk of any contamination event and ensures that contingency plans are in place. Demonstrates compliance with environmental management systems.

Tidal Mitigation Installation Changes in sediment dynamics Birds All receptors

Reduced visibility impacting prey detection and obstruction avoidance.

Best practice methodologies to reduce resuspension of sediment during cable burial or device foundation / mooring installation.

n/a

Tidal Monitoring Installation Marine Non-Native Species (MNNS) Birds All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Monitoring and reporting of MNNS.

Reduce/removes risk of transfer of non-native species.

Tidal Compliance Installation Marine Non-Native Species (MNNS) Birds All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Compliance with all relevant guidance (including IMO guidelines) regarding ballast water management and transfer of non-native species.

Would remove/reduce risk of transfer and settlement of non-native species.

Wave Compliance Decommissioning Contamination Fish All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Management: Establish and implement a Contamination Control Plan / Ship Oil Contamination Emergency Plans (SOPEPs).

Compliance with International Maritime Organisation (IMO) and Maritime Coastguard Agency (MCA) codes for the prevention of contamination.

Reduces risk of any contamination event and ensures that contingency plans are in place. Demonstrates compliance with environmental management systems.

Wave Mitigation Installation Changes in sediment dynamics Fish All receptors

Reduced visibility impacting prey detection and obstruction avoidance.

Best practice methodologies to reduce resuspension of sediment during cable burial or device foundation / mooring installation.

n/a

Wave None identified Operation & Maintenance Barrier to movement Marine Mammals All receptors

Potential barrier to movement due to the physical presence of devices and associated moorings / support structures, cables and electrical equipment.

None identified.

n/a

Wave Mitigation Installation Marine Non-Native Species (MNNS) Fish All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Source vessels locally.

Reduce/removes risk of transfer of non-native species.

Tidal Mitigation Decommissioning Contamination Marine Mammals All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Material selection - lubricants, coolants, hydraulic fluids etc. selected with low ecotoxicity levels and biodegradable.

Reduces/removes risk of contamination from materials which may have escaped structure. However, use of lower toxicity may compromise performance, or impact other technical issues (e.g. fluid changes).

Tidal Mitigation Operation & Maintenance Marine Non-Native Species (MNNS) Marine Mammals All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Source vessels locally.

Reduce/remove risk of transfer of non-native species.

Tidal Mitigation Installation Contamination Reptiles All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Material selection - lubricants, coolants, hydraulic fluids etc. selected with low ecotoxicity levels and biodegradable.

Reduces/removes risk of contamination from materials which may have escaped structure. Although, use of lower toxicity materials may compromise performance, or impact other technical issues (e.g. fluid changes).

Tidal Mitigation Installation Contamination Habitat All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Material selection - lubricants, coolants, hydraulic fluids etc. selected with low ecotoxicity levels and biodegradable.

Reduces/removes risk of contamination from materials which may have escaped structure. However, the use of lower toxicity materials may compromise performance, or impact other technical issue (e.g. fluuid changes).

Tidal Mitigation Operation & Maintenance Marine Non-Native Species (MNNS) Reptiles All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Source vessels locally.

Reduces/removes risk of transfer and settlement of non-native species.

Tidal Compliance Decommissioning Marine Non-Native Species (MNNS) Habitat All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Compliance with all relevant guidance (including IMO guidelines) regarding ballast water management and transfer of non-native species.

Reduce/remove risk of transfer and settlement of non-native species.

Wave Design feature Decommissioning Contamination Benthic All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Physical Containment systems including bulk heads, closed circuit systems, pressure relief systems.

Reduces risk of contamination escaping from structure.

Wave Monitoring Decommissioning Marine Non-Native Species (MNNS) Benthic All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Monitoring and reporting of MNNS.

Reduce/removes risk of transfer of non-native species.

Tidal Design feature Decommissioning Contamination Birds All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Physical Containment systems including bulk heads, closed circuit systems, pressure relief systems.

Reduces risk of contamination escaping from structure.

Wave Compliance Installation Marine Non-Native Species (MNNS) Birds All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Adhere to appropriate measures when jettisoning ballast water.

Reduce/remove risk of transfer of non-native species.

Tidal Design feature Installation Contamination Fish All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Physical Containment systems including bulk heads, closed circuit systems, pressure relief systems.

Reduces risk of contamination escaping from structure.

Wave Mitigation Installation Marine Non-Native Species (MNNS) Fish All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Establish and implement a Biofouling Management Plan.

Reduce/removes risk of transfer of non-native species.

Wave Compliance Decommissioning Contamination Marine Mammals All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Management: Establish and implement a Contamination Control Plan / Ship Oil Contamination Emergency Plans (SOPEPs).

Compliance with International Maritime Organisation (IMO) and Maritime Coastguard Agency (MCA) codes for the prevention of contamination.

Reduces risk of any contamination event, ensures that contingency plans are in place and demonstrates compliance with environmental management systems.

Tidal Mitigation Decommissioning Marine Non-Native Species (MNNS) Marine Mammals All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Establish and implement a Biofouling Management Plan.

Reduce/remove risk of transfer of non-native species.

Wave Compliance Installation Contamination Reptiles All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Management: Establish and implement a Contamination Control Plan / Ship Oil Contamination Emergency Plans (SOPEPs).

Compliance with International Maritime Organisation (IMO) and Maritime Coastguard Agency (MCA) codes for the prevention of contamination.

Reduces risk of any contamination event and ensures that contingency plans are in place. Demonstrates compliance with environmental management systems.

Wave Mitigation Installation Changes in sediment dynamics Reptiles All receptors

Reduced visibility impacting prey detection and obstruction avoidance.

Best practice methodologies to reduce resuspension of sediment during cable burial or device foundation / mooring installation.

n/a

Wave Mitigation Decommissioning Changes in sediment dynamics Habitat All receptors

Sediment disturbance disrupting water clarity that results in smothering of fish spawning grounds.

Best practice methodologies to reduce resuspension of sediment during cable burial or device foundation / mooring installation.

n/a

Tidal Mitigation Decommissioning Marine Non-Native Species (MNNS) Reptiles All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Establish and implement a Biofouling Management Plan.

Reduces/removes risk of transfer and settlement of non-native species.

Wave Compliance Decommissioning Marine Non-Native Species (MNNS) Habitat All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Adhere to appropriate measures when jettisoning ballast water.

Reduce/remove risk of transfer and settlement of non-native species.

Wave Compliance Operation & Maintenance Contamination Habitat All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Management: Establish and implement a Contamination Control Plan / Ship Oil Contamination Emergency Plans (SOPEPs).

Compliance with International Maritime Organisation (IMO) and Maritime Coastguard Agency (MCA) codes for the prevention of contamination.

Reduces risk of any contamination event and ensures that contingency plans are in place. Demonstrates compliance with environmental management systems.

Wave Compliance Installation Contamination Benthic All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Management: Establish and implement a Contamination Control Plan / Ship Oil Contamination Emergency Plans (SOPEPs).

Compliance with International Maritime Organization (IMO) and Maritime Coastguard Agency (MCA) codes for the prevention of contamination.

Reduces risk of any contamination event and ensures that contingency plans are in place. Demonstrates compliance with environmental management systems.

Wave Mitigation Installation Marine Non-Native Species (MNNS) Benthic All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Source vessels locally.

Reduce/remove risk of transfer of non-native species.

Tidal Mitigation Installation Contamination Birds All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Management: Establish and implement a Contamination Control Plan / Ship Oil Contamination Emergency Plans (SOPEPs).

Compliance with International Maritime Organisation (IMO) and Maritime Coastguard Agency (MCA) codes for the prevention of contamination.

Reduces risk of any contamination event and ensures that contingency plans are in place. Demonstrates compliance with environmental management systems.

Wave Mitigation Decommissioning Changes in sediment dynamics Birds All receptors

Reduced visibility impacting prey detection and obstruction avoidance.

Best practice methodologies to reduce resuspension of sediment during cable burial or device foundation / mooring installation.

n/a

Wave Monitoring Decommissioning Marine Non-Native Species (MNNS) Birds All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Monitoring and reporting of MNNS.

Reduce/removes risk of transfer of non-native species.

Wave Compliance Decommissioning Marine Non-Native Species (MNNS) Birds All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Compliance with all relevant guidance (including IMO guidelines) regarding ballast water management and transfer of non-native species.

Would remove/reduce risk of transfer and settlement of non-native species.

Wave Compliance Operation & Maintenance Contamination Fish All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Management: Establish and implement a Contamination Control Plan / Ship Oil Contamination Emergency Plans (SOPEPs).

Compliance with International Maritime Organisation (IMO) and Maritime Coastguard Agency (MCA) codes for the prevention of contamination.

Reduces risk of any contamination event and ensures that contingency plans are in place. Demonstrates compliance with environmental management systems.

Tidal Compliance Decommissioning Marine Non-Native Species (MNNS) Fish All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Adhere to appropriate measures when jettisoning ballast water.

Reduce/removes risk of transfer of non-native species.

Tidal Mitigation Operation & Maintenance Contamination Marine Mammals All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Material selection - lubricants, coolants, hydraulic fluids etc. selected with low ecotoxicity levels and biodegradable.

Reduces/removes risk of contamination from materials which may have escaped structure. However, use of lower toxicity may compromise performance, or impact other technical issues (e.g. fluid changes).

Tidal Mitigation Installation Marine Non-Native Species (MNNS) Marine Mammals All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Source vessels locally.

Reduce/remove risk of transfer of non-native species.

Wave Mitigation Decommissioning Contamination Reptiles All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Material selection - lubricants, coolants, hydraulic fluids etc. selected with low ecotoxicity levels and biodegradable.

Reduces/removes risk of contamination from materials which may have escaped structure. Although, use of lower toxicity materials may compromise performance, or impact other technical issues (e.g. fluid changes).

Wave Mitigation Decommissioning Contamination Habitat All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Material selection - lubricants, coolants, hydraulic fluids etc. selected with low ecotoxicity levels and biodegradable.

Reduces/removes risk of contamination from materials which may have escaped structure. However, the use of lower toxicity materials may compromise performance, or impact other technical issue (e.g. fluuid changes).

Tidal Mitigation Installation Marine Non-Native Species (MNNS) Reptiles All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Source vessels locally.

Reduces/removes risk of transfer and settlement of non-native species.

Tidal Compliance Operation & Maintenance Marine Non-Native Species (MNNS) Habitat All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Compliance with all relevant guidance (including IMO guidelines) regarding ballast water management and transfer of non-native species.

Reduce/remove risk of transfer and settlement of non-native species.

Wave Design feature Operation & Maintenance Contamination Benthic All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Physical Containment systems including bulk heads, closed circuit systems, pressure relief systems.

Reduces risk of contamination escaping from structure.

Wave Monitoring Operation & Maintenance Marine Non-Native Species (MNNS) Benthic All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Monitoring and reporting of MNNS.

Reduce/removes risk of transfer of non-native species.

Tidal Design feature Operation & Maintenance Contamination Birds All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Physical Containment systems including bulk heads, closed circuit systems, pressure relief systems.

Reduces risk of contamination escaping from structure.

Tidal Mitigation Decommissioning Marine Non-Native Species (MNNS) Birds All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Adhere to appropriate measures when jettisoning ballast water.

Reduce/remove risk of transfer of non-native species.

Wave Design feature Decommissioning Contamination Fish All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Physical Containment systems including bulk heads, closed circuit systems, pressure relief systems.

Reduces risk of contamination escaping from structure.

Tidal Compliance Decommissioning Marine Non-Native Species (MNNS) Fish All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Compliance with all relevant guidance (including IMO guidelines) regarding ballast water management and transfer of non-native species.

Reduce/remove risk of transfer and settlement of non-native species.

Tidal Mitigation Installation Marine Non-Native Species (MNNS) Marine Mammals All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Establish and implement a Biofouling Management Plan.

Reduce/remove risk of transfer of non-native species.

Wave Compliance Operation & Maintenance Contamination Marine Mammals All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Management: Establish and implement a Contamination Control Plan / Ship Oil Contamination Emergency Plans (SOPEPs).

Compliance with International Maritime Organisation (IMO) and Maritime Coastguard Agency (MCA) codes for the prevention of contamination.

Reduces risk of any contamination event, ensures that contingency plans are in place and demonstrates compliance with environmental management systems.

Tidal Mitigation Operation & Maintenance Marine Non-Native Species (MNNS) Marine Mammals All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Establish and implement a Biofouling Management Plan.

Reduce/remove risk of transfer of non-native species.

Tidal Mitigation Decommissioning Contamination Reptiles All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Management: Establish and implement a Contamination Control Plan / Ship Oil Contamination Emergency Plans (SOPEPs).

Compliance with International Maritime Organisation (IMO) and Maritime Coastguard Agency (MCA) codes for the prevention of contamination.

Reduces risk of any contamination event and ensures that contingency plans are in place. Demonstrates compliance with environmental management systems.

Tidal None identified Operation & Maintenance Barrier to movement Reptiles All receptors

Potential barrier to movement due to the physical presence of devices and associated moorings / support structures, cables and electrical equipment.

None identified.

n/a

Wave Mitigation Installation Changes in sediment dynamics Habitat All receptors

Sediment disturbance disrupting water clarity that results in smothering of fish spawning grounds.

Best practice methodologies to reduce resuspension of sediment during cable burial or device foundation / mooring installation.

n/a

Tidal Mitigation Operation & Maintenance Marine Non-Native Species (MNNS) Reptiles All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Establish and implement a Biofouling Management Plan.

Reduces/removes risk of transfer and settlement of non-native species.

Wave Compliance Operation & Maintenance Marine Non-Native Species (MNNS) Habitat All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Adhere to appropriate measures when jettisoning ballast water.

Reduce/remove risk of transfer and settlement of non-native species.

Wave Compliance Installation Contamination Habitat All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Management: Establish and implement a Contamination Control Plan / Ship Oil Contamination Emergency Plans (SOPEPs).

Compliance with International Maritime Organisation (IMO) and Maritime Coastguard Agency (MCA) codes for the prevention of contamination.

Reduces risk of any contamination event and ensures that contingency plans are in place. Demonstrates compliance with environmental management systems.

Tidal Mitigation Decommissioning Contamination Benthic All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Where rock placement is used, ensure clean rock is used.

Reduces/removes risk of contamination from materials.

Tidal Compliance Decommissioning Marine Non-Native Species (MNNS) Benthic All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Adhere to appropriate measures when jettisoning ballast water.

Reduce/remove risk of transfer of non-native species.

Wave Mitigation Decommissioning Contamination Birds All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Management: Establish and implement a Contamination Control Plan / Ship Oil Contamination Emergency Plans (SOPEPs).

Compliance with International Maritime Organisation (IMO) and Maritime Coastguard Agency (MCA) codes for the prevention of contamination.

Reduces risk of any contamination event and ensures that contingency plans are in place. Demonstrates compliance with environmental management systems.

Wave Mitigation Installation Changes in sediment dynamics Birds All receptors

Reduced visibility impacting prey detection and obstruction avoidance.

Best practice methodologies to reduce resuspension of sediment during cable burial or device foundation / mooring installation.

n/a

Wave Monitoring Operation & Maintenance Marine Non-Native Species (MNNS) Birds All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Monitoring and reporting of MNNS.

Reduce/removes risk of transfer of non-native species.

Wave Compliance Operation & Maintenance Marine Non-Native Species (MNNS) Birds All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Compliance with all relevant guidance (including IMO guidelines) regarding ballast water management and transfer of non-native species.

Would remove/reduce risk of transfer and settlement of non-native species.

Wave Compliance Installation Contamination Fish All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Management: Establish and implement a Contamination Control Plan / Ship Oil Contamination Emergency Plans (SOPEPs).

Compliance with International Maritime Organisation (IMO) and Maritime Coastguard Agency (MCA) codes for the prevention of contamination.

Reduces risk of any contamination event and ensures that contingency plans are in place. Demonstrates compliance with environmental management systems.

Tidal Compliance Operation & Maintenance Marine Non-Native Species (MNNS) Fish All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Adhere to appropriate measures when jettisoning ballast water.

Reduce/removes risk of transfer of non-native species.

Tidal Mitigation Installation Contamination Marine Mammals All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Material selection - lubricants, coolants, hydraulic fluids etc. selected with low ecotoxicity levels and biodegradable.

Reduces/removes risk of contamination from materials which may have escaped structure. However, use of lower toxicity may compromise performance, or impact other technical issues (e.g. fluid changes).

Wave Mitigation Decommissioning Marine Non-Native Species (MNNS) Marine Mammals All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Source vessels locally.

Reduce/remove risk of transfer of non-native species.

Wave Mitigation Operation & Maintenance Contamination Reptiles All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Material selection - lubricants, coolants, hydraulic fluids etc. selected with low ecotoxicity levels and biodegradable.

Reduces/removes risk of contamination from materials which may have escaped structure. Although, use of lower toxicity materials may compromise performance, or impact other technical issues (e.g. fluid changes).

Wave Mitigation Operation & Maintenance Contamination Habitat All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Material selection - lubricants, coolants, hydraulic fluids etc. selected with low ecotoxicity levels and biodegradable.

Reduces/removes risk of contamination from materials which may have escaped structure. However, the use of lower toxicity materials may compromise performance, or impact other technical issue (e.g. fluuid changes).

Wave Mitigation Decommissioning Marine Non-Native Species (MNNS) Reptiles All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Source vessels locally.

Reduces/removes risk of transfer and settlement of non-native species.

Tidal Compliance Installation Marine Non-Native Species (MNNS) Habitat All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Compliance with all relevant guidance (including IMO guidelines) regarding ballast water management and transfer of non-native species.

Reduce/remove risk of transfer and settlement of non-native species.

Wave Design feature Installation Contamination Benthic All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Physical Containment systems including bulk heads, closed circuit systems, pressure relief systems.

Reduces risk of contamination escaping from structure.

Wave Monitoring Installation Marine Non-Native Species (MNNS) Benthic All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Monitoring and reporting of MNNS.

Reduce/removes risk of transfer of non-native species.

Tidal Design feature Installation Contamination Birds All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Physical Containment systems including bulk heads, closed circuit systems, pressure relief systems.

Reduces risk of contamination escaping from structure.

Tidal Mitigation Operation & Maintenance Marine Non-Native Species (MNNS) Birds All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Adhere to appropriate measures when jettisoning ballast water.

Reduce/remove risk of transfer of non-native species.

Wave Design feature Operation & Maintenance Contamination Fish All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Physical Containment systems including bulk heads, closed circuit systems, pressure relief systems.

Reduces risk of contamination escaping from structure.

Tidal Compliance Operation & Maintenance Marine Non-Native Species (MNNS) Fish All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Compliance with all relevant guidance (including IMO guidelines) regarding ballast water management and transfer of non-native species.

Reduce/remove risk of transfer and settlement of non-native species.

Wave Mitigation Decommissioning Marine Non-Native Species (MNNS) Marine Mammals All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Establish and implement a Biofouling Management Plan.

Reduce/remove risk of transfer of non-native species.

Wave Compliance Installation Contamination Marine Mammals All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Management: Establish and implement a Contamination Control Plan / Ship Oil Contamination Emergency Plans (SOPEPs).

Compliance with International Maritime Organisation (IMO) and Maritime Coastguard Agency (MCA) codes for the prevention of contamination.

Reduces risk of any contamination event, ensures that contingency plans are in place and demonstrates compliance with environmental management systems.

Tidal Monitoring Decommissioning Marine Non-Native Species (MNNS) Marine Mammals All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Monitoring and reporting of MNNS.

Reduces/removes risk of transfer of non-native species.

Tidal Mitigation Operation & Maintenance Contamination Reptiles All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Management: Establish and implement a Contamination Control Plan / Ship Oil Contamination Emergency Plans (SOPEPs).

Compliance with International Maritime Organisation (IMO) and Maritime Coastguard Agency (MCA) codes for the prevention of contamination.

Reduces risk of any contamination event and ensures that contingency plans are in place. Demonstrates compliance with environmental management systems.

Wave None identified Operation & Maintenance Barrier to movement Reptiles All receptors

Potential barrier to movement due to the physical presence of devices and associated moorings / support structures, cables and electrical equipment.

None identified.

n/a

Tidal Mitigation Decommissioning Changes in sediment dynamics Habitat All receptors

Reduced visibility impacting prey detection and obstruction avoidance.

Best practice methodologies to reduce resuspension of sediment during cable burial or device foundation / mooring installation.

n/a

Tidal Mitigation Installation Marine Non-Native Species (MNNS) Reptiles All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Establish and implement a Biofouling Management Plan.

Reduces/removes risk of transfer and settlement of non-native species.

Wave Compliance Installation Marine Non-Native Species (MNNS) Habitat All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Adhere to appropriate measures when jettisoning ballast water.

Reduce/remove risk of transfer and settlement of non-native species.

Tidal Mitigation Decommissioning Contamination Habitat All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Management: Establish and implement a Contamination Control Plan / Ship Oil Contamination Emergency Plans (SOPEPs).

Compliance with International Maritime Organisation (IMO) and Maritime Coastguard Agency (MCA) codes for the prevention of contamination.

Reduces risk of any contamination event and ensures that contingency plans are in place. Demonstrates compliance with environmental management systems.

Tidal Mitigation Operation & Maintenance Contamination Benthic All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Where rock placement is used, ensure clean rock is used.

Reduces/removes risk of contamination from materials.

Tidal Compliance Operation & Maintenance Marine Non-Native Species (MNNS) Benthic All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Adhere to appropriate measures when jettisoning ballast water.

Reduce/remove risk of transfer of non-native species.

Wave Mitigation Operation & Maintenance Contamination Birds All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Management: Establish and implement a Contamination Control Plan / Ship Oil Contamination Emergency Plans (SOPEPs).

Compliance with International Maritime Organisation (IMO) and Maritime Coastguard Agency (MCA) codes for the prevention of contamination.

Reduces risk of any contamination event and ensures that contingency plans are in place. Demonstrates compliance with environmental management systems.

Wave Monitoring Installation Marine Non-Native Species (MNNS) Birds All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Monitoring and reporting of MNNS.

Reduce/removes risk of transfer of non-native species.

Wave Compliance Installation Marine Non-Native Species (MNNS) Birds All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Compliance with all relevant guidance (including IMO guidelines) regarding ballast water management and transfer of non-native species.

Would remove/reduce risk of transfer and settlement of non-native species.

Tidal Mitigation Decommissioning Contamination Fish All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Where rock placement is used, ensure clean rock is used.

Reduces/removes risk of contamination from materials.

Tidal Compliance Installation Marine Non-Native Species (MNNS) Fish All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Adhere to appropriate measures when jettisoning ballast water.

Reduce/removes risk of transfer of non-native species.

Wave Mitigation Decommissioning Contamination Marine Mammals All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Material selection - lubricants, coolants, hydraulic fluids etc. selected with low ecotoxicity levels and biodegradable.

Reduces/removes risk of contamination from materials which may have escaped structure. However, use of lower toxicity may compromise performance, or impact other technical issues (e.g. fluid changes).

Wave Mitigation Operation & Maintenance Marine Non-Native Species (MNNS) Marine Mammals All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Source vessels locally.

Reduce/remove risk of transfer of non-native species.

Wave Mitigation Installation Contamination Reptiles All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Material selection - lubricants, coolants, hydraulic fluids etc. selected with low ecotoxicity levels and biodegradable.

Reduces/removes risk of contamination from materials which may have escaped structure. Although, use of lower toxicity materials may compromise performance, or impact other technical issues (e.g. fluid changes).

Wave Mitigation Installation Contamination Habitat All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Material selection - lubricants, coolants, hydraulic fluids etc. selected with low ecotoxicity levels and biodegradable.

Reduces/removes risk of contamination from materials which may have escaped structure. However, the use of lower toxicity materials may compromise performance, or impact other technical issue (e.g. fluuid changes).

Wave Mitigation Operation & Maintenance Marine Non-Native Species (MNNS) Reptiles All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Source vessels locally.

Reduces/removes risk of transfer and settlement of non-native species.

Wave Compliance Decommissioning Marine Non-Native Species (MNNS) Habitat All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Compliance with all relevant guidance (including IMO guidelines) regarding ballast water management and transfer of non-native species.

Reduce/remove risk of transfer and settlement of non-native species.

Tidal Design feature Installation Marine Non-Native Species (MNNS) Benthic All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Avoid the introduction of hard bottom substrate into a soft bottom habitat.

Ensures the efficient recovery of species native to the surrounding habitat.

May have technical implications.

Wave Design feature Decommissioning Contamination Birds All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Physical Containment systems including bulk heads, closed circuit systems, pressure relief systems.

Reduces risk of contamination escaping from structure.

Tidal Mitigation Installation Marine Non-Native Species (MNNS) Birds All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Adhere to appropriate measures when jettisoning ballast water.

Reduce/remove risk of transfer of non-native species.

Wave Design feature Installation Contamination Fish All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Physical Containment systems including bulk heads, closed circuit systems, pressure relief systems.

Reduces risk of contamination escaping from structure.

Tidal Compliance Installation Marine Non-Native Species (MNNS) Fish All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Compliance with all relevant guidance (including IMO guidelines) regarding ballast water management and transfer of non-native species.

Reduce/remove risk of transfer and settlement of non-native species.

Wave Mitigation Operation & Maintenance Marine Non-Native Species (MNNS) Marine Mammals All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Establish and implement a Biofouling Management Plan.

Reduce/remove risk of transfer of non-native species.

Tidal Mitigation Decommissioning Contamination Marine Mammals All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Management: Establish and implement a Contamination Control Plan / Ship Oil Contamination Emergency Plans (SOPEPs).

Compliance with International Maritime Organisation (IMO) and Maritime Coastguard Agency (MCA) codes for the prevention of contamination.

Reduces risk of any contamination event, ensures that contingency plans are in place and demonstrates compliance with environmental management systems.

Tidal Monitoring Operation & Maintenance Marine Non-Native Species (MNNS) Marine Mammals All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Monitoring and reporting of MNNS.

Reduces/removes risk of transfer of non-native species.

Tidal Mitigation Installation Contamination Reptiles All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Management: Establish and implement a Contamination Control Plan / Ship Oil Contamination Emergency Plans (SOPEPs).

Compliance with International Maritime Organisation (IMO) and Maritime Coastguard Agency (MCA) codes for the prevention of contamination.

Reduces risk of any contamination event and ensures that contingency plans are in place. Demonstrates compliance with environmental management systems.

Tidal Mitigation Installation Changes in sediment dynamics Habitat All receptors

Reduced visibility impacting prey detection and obstruction avoidance.

Best practice methodologies to reduce resuspension of sediment during cable burial or device foundation / mooring installation.

n/a

Wave Mitigation Decommissioning Marine Non-Native Species (MNNS) Reptiles All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Establish and implement a Biofouling Management Plan.

Reduces/removes risk of transfer and settlement of non-native species.

Tidal Mitigation Decommissioning Marine Non-Native Species (MNNS) Habitat All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Adhere to appropriate measures when jettisoning ballast water.

Reduce/remove risk of transfer and settlement of non-native species.

Tidal Mitigation Operation & Maintenance Contamination Habitat All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Management: Establish and implement a Contamination Control Plan / Ship Oil Contamination Emergency Plans (SOPEPs).

Compliance with International Maritime Organisation (IMO) and Maritime Coastguard Agency (MCA) codes for the prevention of contamination.

Reduces risk of any contamination event and ensures that contingency plans are in place. Demonstrates compliance with environmental management systems.

Tidal Mitigation Installation Contamination Benthic All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Where rock placement is used, ensure clean rock is used.

Reduces/removes risk of contamination from materials.

Tidal Compliance Installation Marine Non-Native Species (MNNS) Benthic All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Adhere to appropriate measures when jettisoning ballast water.

Reduce/remove risk of transfer of non-native species.

Wave Mitigation Installation Contamination Birds All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Management: Establish and implement a Contamination Control Plan / Ship Oil Contamination Emergency Plans (SOPEPs).

Compliance with International Maritime Organisation (IMO) and Maritime Coastguard Agency (MCA) codes for the prevention of contamination.

Reduces risk of any contamination event and ensures that contingency plans are in place. Demonstrates compliance with environmental management systems.

Tidal Design feature Installation Marine Non-Native Species (MNNS) Birds All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Avoid the introduction of hard bottom substrate into a soft bottom habitat.

Ensures the efficient recovery of species native to the surrounding habitat.

May have technical implications.

Tidal Mitigation Operation & Maintenance Contamination Fish All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Where rock placement is used, ensure clean rock is used.

Reduces/removes risk of contamination from materials.

Wave Compliance Decommissioning Marine Non-Native Species (MNNS) Fish All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Adhere to appropriate measures when jettisoning ballast water.

Reduce/removes risk of transfer of non-native species.

Wave Mitigation Operation & Maintenance Contamination Marine Mammals All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Material selection - lubricants, coolants, hydraulic fluids etc. selected with low ecotoxicity levels and biodegradable.

Reduces/removes risk of contamination from materials which may have escaped structure. However, use of lower toxicity may compromise performance, or impact other technical issues (e.g. fluid changes).

Wave Mitigation Installation Marine Non-Native Species (MNNS) Marine Mammals All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Source vessels locally.

Reduce/remove risk of transfer of non-native species.

Tidal Design feature Decommissioning Contamination Reptiles All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Physical Containment systems including bulk heads, closed circuit systems, pressure relief systems.

Reduces risk of contamination escaping from structure.

Tidal Design feature Decommissioning Contamination Habitat All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Physical Containment systems including bulk heads, closed circuit systems, pressure relief systems.

Reduces risk of contamination escaping from structure.

Wave Mitigation Installation Marine Non-Native Species (MNNS) Reptiles All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Source vessels locally.

Reduces/removes risk of transfer and settlement of non-native species.

Wave Compliance Operation & Maintenance Marine Non-Native Species (MNNS) Habitat All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Compliance with all relevant guidance (including IMO guidelines) regarding ballast water management and transfer of non-native species.

Reduce/remove risk of transfer and settlement of non-native species.

Tidal Mitigation Decommissioning Changes in sediment dynamics Benthic All receptors

Sediment disturbance disrupting water clarity that results in smothering of fish spawning grounds.

Best practice methodologies to reduce resuspension of sediment during cable burial or device foundation / mooring installation.

n/a

Wave Design feature Installation Marine Non-Native Species (MNNS) Benthic All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Avoid the introduction of hard bottom substrate into a soft bottom habitat.

Ensures the efficient recovery of species native to the surrounding habitat.

May have technical implications.

Wave Design feature Operation & Maintenance Contamination Birds All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Physical Containment systems including bulk heads, closed circuit systems, pressure relief systems.

Reduces risk of contamination escaping from structure.

Wave Mitigation Decommissioning Marine Non-Native Species (MNNS) Birds All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Adhere to appropriate measures when jettisoning ballast water.

Reduce/remove risk of transfer of non-native species.

Wave Compliance Decommissioning Marine Non-Native Species (MNNS) Fish All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Compliance with all relevant guidance (including IMO guidelines) regarding ballast water management and transfer of non-native species.

Reduce/remove risk of transfer and settlement of non-native species.

Tidal Monitoring Decommissioning Marine Non-Native Species (MNNS) Fish All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Monitoring and reporting of MNNS.

Reduces/removes risk of transfer of non-native species.

Wave Mitigation Installation Marine Non-Native Species (MNNS) Marine Mammals All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Establish and implement a Biofouling Management Plan.

Reduce/remove risk of transfer of non-native species.

Tidal Mitigation Operation & Maintenance Contamination Marine Mammals All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Management: Establish and implement a Contamination Control Plan / Ship Oil Contamination Emergency Plans (SOPEPs).

Compliance with International Maritime Organisation (IMO) and Maritime Coastguard Agency (MCA) codes for the prevention of contamination.

Reduces risk of any contamination event, ensures that contingency plans are in place and demonstrates compliance with environmental management systems.

Tidal Monitoring Installation Marine Non-Native Species (MNNS) Marine Mammals All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Monitoring and reporting of MNNS.

Reduces/removes risk of transfer of non-native species.

Wave Mitigation Decommissioning Contamination Reptiles All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Management: Establish and implement a Contamination Control Plan / Ship Oil Contamination Emergency Plans (SOPEPs).

Compliance with International Maritime Organisation (IMO) and Maritime Coastguard Agency (MCA) codes for the prevention of contamination.

Reduces risk of any contamination event and ensures that contingency plans are in place. Demonstrates compliance with environmental management systems.

Wave Mitigation Decommissioning Changes in sediment dynamics Habitat All receptors

Reduced visibility impacting prey detection and obstruction avoidance.

Best practice methodologies to reduce resuspension of sediment during cable burial or device foundation / mooring installation.

n/a

Wave Mitigation Operation & Maintenance Marine Non-Native Species (MNNS) Reptiles All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Establish and implement a Biofouling Management Plan.

Reduces/removes risk of transfer and settlement of non-native species.

Tidal Mitigation Operation & Maintenance Marine Non-Native Species (MNNS) Habitat All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Adhere to appropriate measures when jettisoning ballast water.

Reduce/remove risk of transfer and settlement of non-native species.

Tidal Mitigation Installation Contamination Habitat All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Management: Establish and implement a Contamination Control Plan / Ship Oil Contamination Emergency Plans (SOPEPs).

Compliance with International Maritime Organisation (IMO) and Maritime Coastguard Agency (MCA) codes for the prevention of contamination.

Reduces risk of any contamination event and ensures that contingency plans are in place. Demonstrates compliance with environmental management systems.

Wave Mitigation Decommissioning Contamination Benthic All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Where rock placement is used, ensure clean rock is used.

Reduces/removes risk of contamination from materials.

Wave Compliance Decommissioning Marine Non-Native Species (MNNS) Benthic All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Adhere to appropriate measures when jettisoning ballast water.

Reduce/remove risk of transfer of non-native species.

Tidal Mitigation Decommissioning Contamination Birds All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Where rock placement is used, ensure clean rock is used.

Reduces/removes risk of contamination from materials.

Wave Design feature Installation Marine Non-Native Species (MNNS) Birds All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Avoid the introduction of hard bottom substrate into a soft bottom habitat.

Ensures the efficient recovery of species native to the surrounding habitat.

May have technical implications.

Tidal Mitigation Installation Contamination Fish All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Where rock placement is used, ensure clean rock is used.

Reduces/removes risk of contamination from materials.

Wave Compliance Operation & Maintenance Marine Non-Native Species (MNNS) Fish All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Adhere to appropriate measures when jettisoning ballast water.

Reduce/removes risk of transfer of non-native species.

Wave Mitigation Installation Contamination Marine Mammals All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Material selection - lubricants, coolants, hydraulic fluids etc. selected with low ecotoxicity levels and biodegradable.

Reduces/removes risk of contamination from materials which may have escaped structure. However, use of lower toxicity may compromise performance, or impact other technical issues (e.g. fluid changes).

Tidal Compliance Decommissioning Marine Non-Native Species (MNNS) Marine Mammals All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Adhere to appropriate measures when jettisoning ballast water.

Reduce/remove risk of transfer of non-native species.

Tidal Design feature Operation & Maintenance Contamination Reptiles All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Physical Containment systems including bulk heads, closed circuit systems, pressure relief systems.

Reduces risk of contamination escaping from structure.

Tidal Design feature Operation & Maintenance Contamination Habitat All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Physical Containment systems including bulk heads, closed circuit systems, pressure relief systems.

Reduces risk of contamination escaping from structure.

Tidal Compliance Decommissioning Marine Non-Native Species (MNNS) Reptiles All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Adhere to appropriate measures when jettisoning ballast water.

Reduces/removes risk of transfer and settlement of non-native species.

Wave Compliance Installation Marine Non-Native Species (MNNS) Habitat All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Compliance with all relevant guidance (including IMO guidelines) regarding ballast water management and transfer of non-native species.

Reduce/remove risk of transfer and settlement of non-native species.

Tidal Mitigation Installation Changes in sediment dynamics Benthic All receptors

Sediment disturbance disrupting water clarity that results in smothering of fish spawning grounds.

Best practice methodologies to reduce resuspension of sediment during cable burial or device foundation / mooring installation.

n/a

Tidal Compliance Decommissioning Marine Non-Native Species (MNNS) Benthic All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Compliance with all relevant guidance (including IMO guidelines) regarding ballast water management and transfer of non-native species.

Reduce/remove risk of transfer and settlement of non-native species.

Wave Design feature Installation Contamination Birds All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Physical Containment systems including bulk heads, closed circuit systems, pressure relief systems.

Reduces risk of contamination escaping from structure.

Wave Mitigation Operation & Maintenance Marine Non-Native Species (MNNS) Birds All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Adhere to appropriate measures when jettisoning ballast water.

Reduce/remove risk of transfer of non-native species.

Wave Compliance Operation & Maintenance Marine Non-Native Species (MNNS) Fish All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Compliance with all relevant guidance (including IMO guidelines) regarding ballast water management and transfer of non-native species.

Reduce/remove risk of transfer and settlement of non-native species.

Tidal Monitoring Operation & Maintenance Marine Non-Native Species (MNNS) Fish All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Monitoring and reporting of MNNS.

Reduces/removes risk of transfer of non-native species.

Tidal Monitoring Operation & Maintenance Habitat creation Marine Mammals All receptors

The introduction of infrastructure and artificial substrates will provide habitat and artificial refuges.

Monitor near-field behaviours .

Informs understanding of potential positive impacts from colonisation and use of the project infrastructure which could benefit future project applications, however there is a cost implication associated with monitoring.

Tidal Mitigation Installation Contamination Marine Mammals All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Management: Establish and implement a Contamination Control Plan / Ship Oil Contamination Emergency Plans (SOPEPs).

Compliance with International Maritime Organisation (IMO) and Maritime Coastguard Agency (MCA) codes for the prevention of contamination.

Reduces risk of any contamination event, ensures that contingency plans are in place and demonstrates compliance with environmental management systems.

Wave Monitoring Decommissioning Marine Non-Native Species (MNNS) Marine Mammals All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Monitoring and reporting of MNNS.

Reduces/removes risk of transfer of non-native species.

Tidal Compliance Decommissioning Marine Non-Native Species (MNNS) Reptiles All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Compliance with all relevant guidance (including IMO guidelines) regarding ballast water management and transfer of non-native species.

Reduces/removes risk of transfer and settlement of non-native species.

Wave Mitigation Operation & Maintenance Contamination Reptiles All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Management: Establish and implement a Contamination Control Plan / Ship Oil Contamination Emergency Plans (SOPEPs).

Compliance with International Maritime Organisation (IMO) and Maritime Coastguard Agency (MCA) codes for the prevention of contamination.

Reduces risk of any contamination event and ensures that contingency plans are in place. Demonstrates compliance with environmental management systems.

Wave Mitigation Installation Changes in sediment dynamics Habitat All receptors

Reduced visibility impacting prey detection and obstruction avoidance.

Best practice methodologies to reduce resuspension of sediment during cable burial or device foundation / mooring installation.

n/a

Wave Mitigation Installation Marine Non-Native Species (MNNS) Reptiles All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Establish and implement a Biofouling Management Plan.

Reduces/removes risk of transfer and settlement of non-native species.

Tidal Mitigation Installation Marine Non-Native Species (MNNS) Habitat All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Adhere to appropriate measures when jettisoning ballast water.

Reduce/remove risk of transfer and settlement of non-native species.

Wave Mitigation Decommissioning Contamination Habitat All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Management: Establish and implement a Contamination Control Plan / Ship Oil Contamination Emergency Plans (SOPEPs).

Compliance with International Maritime Organisation (IMO) and Maritime Coastguard Agency (MCA) codes for the prevention of contamination.

Reduces risk of any contamination event and ensures that contingency plans are in place. Demonstrates compliance with environmental management systems.

Wave Mitigation Operation & Maintenance Contamination Benthic All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Where rock placement is used, ensure clean rock is used.

Reduces/removes risk of contamination from materials.

Wave Compliance Operation & Maintenance Marine Non-Native Species (MNNS) Benthic All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Adhere to appropriate measures when jettisoning ballast water.

Reduce/remove risk of transfer of non-native species.

Tidal Mitigation Operation & Maintenance Contamination Birds All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Where rock placement is used, ensure clean rock is used.

Reduces/removes risk of contamination from materials.

Tidal Mitigation Decommissioning Marine Non-Native Species (MNNS) Birds All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Source vessels locally.

Reduce/remove risk of transfer of non-native species.

Wave Mitigation Decommissioning Contamination Fish All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Where rock placement is used, ensure clean rock is used.

Reduces/removes risk of contamination from materials.

Wave Compliance Installation Marine Non-Native Species (MNNS) Fish All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Adhere to appropriate measures when jettisoning ballast water.

Reduce/removes risk of transfer of non-native species.

Tidal Design feature Decommissioning Contamination Marine Mammals All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Physical Containment systems including bulk heads, closed circuit systems, pressure relief systems.

Reduces risk of contamination escaping from structure.

Tidal Compliance Operation & Maintenance Marine Non-Native Species (MNNS) Marine Mammals All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Adhere to appropriate measures when jettisoning ballast water.

Reduce/remove risk of transfer of non-native species.

Tidal Design feature Installation Contamination Reptiles All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Physical Containment systems including bulk heads, closed circuit systems, pressure relief systems.

Reduces risk of contamination escaping from structure.

Tidal Design feature Installation Contamination Habitat All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Physical Containment systems including bulk heads, closed circuit systems, pressure relief systems.

Reduces risk of contamination escaping from structure.

Tidal Compliance Operation & Maintenance Marine Non-Native Species (MNNS) Reptiles All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Adhere to appropriate measures when jettisoning ballast water.

Reduces/removes risk of transfer and settlement of non-native species.

Wave Mitigation Decommissioning Changes in sediment dynamics Benthic All receptors

Sediment disturbance disrupting water clarity that results in smothering of fish spawning grounds.

Best practice methodologies to reduce resuspension of sediment during cable burial or device foundation / mooring installation.

n/a

Tidal Compliance Operation & Maintenance Marine Non-Native Species (MNNS) Benthic All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Compliance with all relevant guidance (including IMO guidelines) regarding ballast water management and transfer of non-native species.

Reduce/remove risk of transfer and settlement of non-native species.

Wave Mitigation Installation Marine Non-Native Species (MNNS) Birds All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Adhere to appropriate measures when jettisoning ballast water.

Reduce/remove risk of transfer of non-native species.

Wave Compliance Installation Marine Non-Native Species (MNNS) Fish All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Compliance with all relevant guidance (including IMO guidelines) regarding ballast water management and transfer of non-native species.

Reduce/remove risk of transfer and settlement of non-native species.

Tidal Mitigation Decommissioning Changes in sediment dynamics Marine Mammals All receptors

Sediment disturbance disrupting water clarity that results in smothering of fish spawning grounds.

Best practice methodologies to reduce resuspension of sediment during cable burial or device foundation / mooring installation.

n/a

Tidal Monitoring Installation Marine Non-Native Species (MNNS) Fish All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Monitoring and reporting of MNNS.

Reduces/removes risk of transfer of non-native species.

Wave Monitoring Operation & Maintenance Habitat creation Marine Mammals All receptors

The introduction of infrastructure and artificial substrates will provide habitat and artificial refuges.

Monitor near-field behaviours .

Informs understanding of potential positive impacts from colonisation and use of the project infrastructure which could benefit future project applications, however there is a cost implication associated with monitoring.

Wave Mitigation Decommissioning Contamination Marine Mammals All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Management: Establish and implement a Contamination Control Plan / Ship Oil Contamination Emergency Plans (SOPEPs).

Compliance with International Maritime Organisation (IMO) and Maritime Coastguard Agency (MCA) codes for the prevention of contamination.

Reduces risk of any contamination event, ensures that contingency plans are in place and demonstrates compliance with environmental management systems.

Wave Monitoring Operation & Maintenance Marine Non-Native Species (MNNS) Marine Mammals All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Monitoring and reporting of MNNS.

Reduces/removes risk of transfer of non-native species.

Tidal Compliance Operation & Maintenance Marine Non-Native Species (MNNS) Reptiles All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Compliance with all relevant guidance (including IMO guidelines) regarding ballast water management and transfer of non-native species.

Reduces/removes risk of transfer and settlement of non-native species.

Wave Mitigation Installation Contamination Reptiles All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Management: Establish and implement a Contamination Control Plan / Ship Oil Contamination Emergency Plans (SOPEPs).

Compliance with International Maritime Organisation (IMO) and Maritime Coastguard Agency (MCA) codes for the prevention of contamination.

Reduces risk of any contamination event and ensures that contingency plans are in place. Demonstrates compliance with environmental management systems.

Tidal None identified Operation & Maintenance Barrier to movement Habitat All receptors

Potential barrier to movement due to the physical presence of devices and associated moorings / support structures, cables and electrical equipment.

None identified.

n/a

Wave Mitigation Decommissioning Marine Non-Native Species (MNNS) Habitat All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Adhere to appropriate measures when jettisoning ballast water.

Reduce/remove risk of transfer and settlement of non-native species.

Wave Mitigation Operation & Maintenance Contamination Habitat All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Management: Establish and implement a Contamination Control Plan / Ship Oil Contamination Emergency Plans (SOPEPs).

Compliance with International Maritime Organisation (IMO) and Maritime Coastguard Agency (MCA) codes for the prevention of contamination.

Reduces risk of any contamination event and ensures that contingency plans are in place. Demonstrates compliance with environmental management systems.

Wave Mitigation Installation Contamination Benthic All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Where rock placement is used, ensure clean rock is used.

Reduces/removes risk of contamination from materials.

Wave Compliance Installation Marine Non-Native Species (MNNS) Benthic All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Adhere to appropriate measures when jettisoning ballast water.

Reduce/remove risk of transfer of non-native species.

Tidal Mitigation Installation Contamination Birds All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Where rock placement is used, ensure clean rock is used.

Reduces/removes risk of contamination from materials.

Tidal Mitigation Operation & Maintenance Marine Non-Native Species (MNNS) Birds All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Source vessels locally.

Reduce/remove risk of transfer of non-native species.

Wave Mitigation Operation & Maintenance Contamination Fish All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Where rock placement is used, ensure clean rock is used.

Reduces/removes risk of contamination from materials.

Tidal Mitigation Decommissioning Marine Non-Native Species (MNNS) Fish All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Adhere to appropriate measures when jettisoning ballast water.

Reduce/removes risk of transfer of non-native species.

Tidal Design feature Operation & Maintenance Contamination Marine Mammals All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Physical Containment systems including bulk heads, closed circuit systems, pressure relief systems.

Reduces risk of contamination escaping from structure.

Tidal Compliance Installation Marine Non-Native Species (MNNS) Marine Mammals All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Adhere to appropriate measures when jettisoning ballast water.

Reduce/remove risk of transfer of non-native species.

Wave Design feature Decommissioning Contamination Reptiles All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Physical Containment systems including bulk heads, closed circuit systems, pressure relief systems.

Reduces risk of contamination escaping from structure.

Wave Design feature Decommissioning Contamination Habitat All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Physical Containment systems including bulk heads, closed circuit systems, pressure relief systems.

Reduces risk of contamination escaping from structure.

Tidal Compliance Installation Marine Non-Native Species (MNNS) Reptiles All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Adhere to appropriate measures when jettisoning ballast water.

Reduces/removes risk of transfer and settlement of non-native species.

Wave Mitigation Installation Changes in sediment dynamics Benthic All receptors

Sediment disturbance disrupting water clarity that results in smothering of fish spawning grounds.

Best practice methodologies to reduce resuspension of sediment during cable burial or device foundation / mooring installation.

n/a

Tidal Compliance Installation Marine Non-Native Species (MNNS) Benthic All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Compliance with all relevant guidance (including IMO guidelines) regarding ballast water management and transfer of non-native species.

Reduce/remove risk of transfer and settlement of non-native species.

Tidal Mitigation Decommissioning Marine Non-Native Species (MNNS) Birds All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Establish and implement a Biofouling Management Plan.

Reduce/remove risk of transfer of non-native species.

Tidal Mitigation Installation Changes in sediment dynamics Marine Mammals All receptors

Sediment disturbance disrupting water clarity that results in smothering of fish spawning grounds.

Best practice methodologies to reduce resuspension of sediment during cable burial or device foundation / mooring installation.

n/a

Wave Monitoring Decommissioning Marine Non-Native Species (MNNS) Fish All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Monitoring and reporting of MNNS.

Reduces/removes risk of transfer of non-native species.

Tidal Mitigation Operation & Maintenance Entrapment Marine Mammals All receptors

Potential risk of entrapment within device chambers and mooring arrays.

Release entrapped animal.

Animal may be deceased before it is able to be released.

Wave Mitigation Operation & Maintenance Contamination Marine Mammals All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Management: Establish and implement a Contamination Control Plan / Ship Oil Contamination Emergency Plans (SOPEPs).

Compliance with International Maritime Organisation (IMO) and Maritime Coastguard Agency (MCA) codes for the prevention of contamination.

Reduces risk of any contamination event, ensures that contingency plans are in place and demonstrates compliance with environmental management systems.

Wave Monitoring Installation Marine Non-Native Species (MNNS) Marine Mammals All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Monitoring and reporting of MNNS.

Reduces/removes risk of transfer of non-native species.

Tidal Compliance Installation Marine Non-Native Species (MNNS) Reptiles All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Compliance with all relevant guidance (including IMO guidelines) regarding ballast water management and transfer of non-native species.

Reduces/removes risk of transfer and settlement of non-native species.

Tidal Mitigation Decommissioning Contamination Reptiles All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Where rock placement is used, ensure clean rock is used.

Reduces/removes risk of contamination from materials.

Tidal Mitigation Decommissioning Contamination Habitat All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Where rock placement is used, ensure clean rock is used.

Reduces/removes risk of contamination from materials.

Wave None identified Operation & Maintenance Barrier to movement Habitat All receptors

Potential barrier to movement due to the physical presence of devices and associated moorings / support structures, cables and electrical equipment.

None identified.

n/a

Wave Mitigation Operation & Maintenance Marine Non-Native Species (MNNS) Habitat All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Adhere to appropriate measures when jettisoning ballast water.

Reduce/remove risk of transfer and settlement of non-native species.

Wave Mitigation Installation Contamination Habitat All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Management: Establish and implement a Contamination Control Plan / Ship Oil Contamination Emergency Plans (SOPEPs).

Compliance with International Maritime Organisation (IMO) and Maritime Coastguard Agency (MCA) codes for the prevention of contamination.

Reduces risk of any contamination event and ensures that contingency plans are in place. Demonstrates compliance with environmental management systems.

Tidal Mitigation Decommissioning Contamination Benthic All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Material selection - lubricants, coolants, hydraulic fluids etc. selected with low ecotoxicity levels and biodegradable.

Reduces/removes risk of contamination from materials which may have escaped structure. However, use of lower toxicity may compromise performance, or impact other technical issues (e.g. fluid changes).

Tidal Compliance Decommissioning Marine Non-Native Species (MNNS) Benthic All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Monitoring and reporting of MNNS.

Reduce/removes risk of transfer of non-native species.

Tidal Mitigation Decommissioning Marine Non-Native Species (MNNS) Benthic All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Establish and implement a Biofouling Management Plan.

Reduce/remove risk of transfer of non-native species.

Wave Mitigation Decommissioning Contamination Birds All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Where rock placement is used, ensure clean rock is used.

Reduces/removes risk of contamination from materials.

Tidal Mitigation Installation Marine Non-Native Species (MNNS) Birds All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Source vessels locally.

Reduce/remove risk of transfer of non-native species.

Wave Mitigation Installation Contamination Fish All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Where rock placement is used, ensure clean rock is used.

Reduces/removes risk of contamination from materials.

Tidal Mitigation Operation & Maintenance Marine Non-Native Species (MNNS) Fish All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Adhere to appropriate measures when jettisoning ballast water.

Reduce/removes risk of transfer of non-native species.

Tidal Design feature Installation Contamination Marine Mammals All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Physical Containment systems including bulk heads, closed circuit systems, pressure relief systems.

Reduces risk of contamination escaping from structure.

Wave Compliance Decommissioning Marine Non-Native Species (MNNS) Marine Mammals All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Adhere to appropriate measures when jettisoning ballast water.

Reduce/remove risk of transfer of non-native species.

Wave Design feature Operation & Maintenance Contamination Reptiles All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Physical Containment systems including bulk heads, closed circuit systems, pressure relief systems.

Reduces risk of contamination escaping from structure.

Wave Design feature Operation & Maintenance Contamination Habitat All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Physical Containment systems including bulk heads, closed circuit systems, pressure relief systems.

Reduces risk of contamination escaping from structure.

Wave Compliance Decommissioning Marine Non-Native Species (MNNS) Reptiles All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Adhere to appropriate measures when jettisoning ballast water.

Reduces/removes risk of transfer and settlement of non-native species.

Tidal Mitigation Decommissioning Marine Non-Native Species (MNNS) Habitat All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Source vessels locally.

Reduce/remove risk of transfer and settlement of non-native species.

Tidal Mitigation Decommissioning Changes in sediment dynamics Benthic All receptors

Reduced visibility from altered water clarity associated with sediment mixing that can impact prey detection and obstruction avoidance.

Best practice methodologies to reduce resuspension of sediment during cable burial or device foundation / mooring installation.

n/a

Wave Compliance Decommissioning Marine Non-Native Species (MNNS) Benthic All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Compliance with all relevant guidance (including IMO guidelines) regarding ballast water management and transfer of non-native species.

Reduce/remove risk of transfer and settlement of non-native species.

Tidal Compliance Decommissioning Contamination Birds All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Management: Establish and implement a Contamination Control Plan / Ship Oil Contamination Emergency Plans (SOPEPs).

Compliance with International Maritime Organisation (IMO) and Maritime Coastguard Agency (MCA) codes for the prevention of contamination.

Reduces risk of any contamination event and ensures that contingency plans are in place. Demonstrates compliance with environmental management systems.

Tidal Mitigation Operation & Maintenance Marine Non-Native Species (MNNS) Birds All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Establish and implement a Biofouling Management Plan.

Reduce/remove risk of transfer of non-native species.

Tidal Mitigation Decommissioning Changes in sediment dynamics Fish All receptors

Sediment disturbance disrupting water clarity that results in smothering of fish spawning grounds.

Best practice methodologies to reduce resuspension of sediment during cable burial or device foundation / mooring installation.

n/a

Wave Mitigation Decommissioning Changes in sediment dynamics Marine Mammals All receptors

Sediment disturbance disrupting water clarity that results in smothering of fish spawning grounds.

Best practice methodologies to reduce resuspension of sediment during cable burial or device foundation / mooring installation.

n/a

Wave Monitoring Operation & Maintenance Marine Non-Native Species (MNNS) Fish All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Monitoring and reporting of MNNS.

Reduces/removes risk of transfer of non-native species.

Wave Mitigation Operation & Maintenance Entrapment Marine Mammals All receptors

Potential risk of entrapment within device chambers and mooring arrays.

Release entrapped animal.

Animal may be deceased before it is able to be released.

Wave Mitigation Installation Contamination Marine Mammals All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Management: Establish and implement a Contamination Control Plan / Ship Oil Contamination Emergency Plans (SOPEPs).

Compliance with International Maritime Organisation (IMO) and Maritime Coastguard Agency (MCA) codes for the prevention of contamination.

Reduces risk of any contamination event, ensures that contingency plans are in place and demonstrates compliance with environmental management systems.

Tidal Compliance Decommissioning Marine Non-Native Species (MNNS) Marine Mammals All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Compliance with all relevant guidance (including IMO guidelines) regarding ballast water management and transfer of non-native species.

Reduces/removes risk of transfer and settlement of non-native species.

Wave Compliance Decommissioning Marine Non-Native Species (MNNS) Reptiles All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Compliance with all relevant guidance (including IMO guidelines) regarding ballast water management and transfer of non-native species.

Reduces/removes risk of transfer and settlement of non-native species.

Tidal Mitigation Operation & Maintenance Contamination Reptiles All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Where rock placement is used, ensure clean rock is used.

Reduces/removes risk of contamination from materials.

Tidal Mitigation Operation & Maintenance Contamination Habitat All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Where rock placement is used, ensure clean rock is used.

Reduces/removes risk of contamination from materials.

Tidal Monitoring Decommissioning Marine Non-Native Species (MNNS) Reptiles All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Monitoring and reporting of MNNS.

Reduces/removes risk of transfer of non-native species.

Wave Mitigation Installation Marine Non-Native Species (MNNS) Habitat All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Adhere to appropriate measures when jettisoning ballast water.

Reduce/remove risk of transfer and settlement of non-native species.

Tidal Mitigation Operation & Maintenance Contamination Benthic All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Material selection - lubricants, coolants, hydraulic fluids etc. selected with low ecotoxicity levels and biodegradable.

Reduces/removes risk of contamination from materials which may have escaped structure. However, use of lower toxicity may compromise performance, or impact other technical issues (e.g. fluid changes).

Tidal Compliance Operation & Maintenance Marine Non-Native Species (MNNS) Benthic All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Monitoring and reporting of MNNS.

Reduce/removes risk of transfer of non-native species.

Tidal Mitigation Operation & Maintenance Marine Non-Native Species (MNNS) Benthic All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Establish and implement a Biofouling Management Plan.

Reduce/remove risk of transfer of non-native species.

Tidal Monitoring Operation & Maintenance Habitat creation Birds All receptors

The introduction of infrastructure and artificial substrates will provide habitat and artificial refuges.

Monitor near-field behaviours.

Informs understanding of potential positive impacts from colonisation and use of the project infrastructure which could benefit future project applications, however there is a cost implication associated with monitoring.

Wave Mitigation Operation & Maintenance Contamination Birds All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Where rock placement is used, ensure clean rock is used.

Reduces/removes risk of contamination from materials.

Wave Mitigation Decommissioning Marine Non-Native Species (MNNS) Birds All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Source vessels locally.

Reduce/remove risk of transfer of non-native species.

Tidal Mitigation Decommissioning Contamination Fish All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Material selection - lubricants, coolants, hydraulic fluids etc. selected with low ecotoxicity levels and biodegradable.

Reduces/removes risk of contamination from materials which may have escaped structure. Alrhough, use of lower toxicity materials may compromise performance, or impact other technical issues (e.g. fluid changes).

Tidal Mitigation Installation Marine Non-Native Species (MNNS) Fish All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Adhere to appropriate measures when jettisoning ballast water.

Reduce/removes risk of transfer of non-native species.

Wave Design feature Decommissioning Contamination Marine Mammals All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Physical Containment systems including bulk heads, closed circuit systems, pressure relief systems.

Reduces risk of contamination escaping from structure.

Wave Compliance Operation & Maintenance Marine Non-Native Species (MNNS) Marine Mammals All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Adhere to appropriate measures when jettisoning ballast water.

Reduce/remove risk of transfer of non-native species.

Wave Design feature Installation Contamination Reptiles All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Physical Containment systems including bulk heads, closed circuit systems, pressure relief systems.

Reduces risk of contamination escaping from structure.

Wave Design feature Installation Contamination Habitat All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Physical Containment systems including bulk heads, closed circuit systems, pressure relief systems.

Reduces risk of contamination escaping from structure.

Wave Compliance Operation & Maintenance Marine Non-Native Species (MNNS) Reptiles All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Adhere to appropriate measures when jettisoning ballast water.

Reduces/removes risk of transfer and settlement of non-native species.

Tidal Mitigation Operation & Maintenance Marine Non-Native Species (MNNS) Habitat All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Source vessels locally.

Reduce/remove risk of transfer and settlement of non-native species.

Tidal Compliance Operation & Maintenance Contamination Birds All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Management: Establish and implement a Contamination Control Plan / Ship Oil Contamination Emergency Plans (SOPEPs).

Compliance with International Maritime Organisation (IMO) and Maritime Coastguard Agency (MCA) codes for the prevention of contamination.

Reduces risk of any contamination event and ensures that contingency plans are in place. Demonstrates compliance with environmental management systems.

Tidal Mitigation Installation Marine Non-Native Species (MNNS) Birds All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Establish and implement a Biofouling Management Plan.

Reduce/remove risk of transfer of non-native species.

Tidal Mitigation Installation Changes in sediment dynamics Fish All receptors

Sediment disturbance disrupting water clarity that results in smothering of fish spawning grounds.

Best practice methodologies to reduce resuspension of sediment during cable burial or device foundation / mooring installation.

n/a

Wave Mitigation Installation Changes in sediment dynamics Marine Mammals All receptors

Sediment disturbance disrupting water clarity that results in smothering of fish spawning grounds.

Best practice methodologies to reduce resuspension of sediment during cable burial or device foundation / mooring installation.

n/a

Wave Monitoring Installation Marine Non-Native Species (MNNS) Fish All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Monitoring and reporting of MNNS.

Reduces/removes risk of transfer of non-native species.

Tidal Mitigation Decommissioning Contamination Marine Mammals All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Where rock placement is used, ensure clean rock is used.

Reduces/removes risk of contamination from materials.

Tidal Compliance Operation & Maintenance Marine Non-Native Species (MNNS) Marine Mammals All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Compliance with all relevant guidance (including IMO guidelines) regarding ballast water management and transfer of non-native species.

Reduces/removes risk of transfer and settlement of non-native species.

Wave Compliance Operation & Maintenance Marine Non-Native Species (MNNS) Reptiles All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Compliance with all relevant guidance (including IMO guidelines) regarding ballast water management and transfer of non-native species.

Reduces/removes risk of transfer and settlement of non-native species.

Tidal Mitigation Installation Contamination Reptiles All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Where rock placement is used, ensure clean rock is used.

Reduces/removes risk of contamination from materials.

Tidal Mitigation Installation Contamination Habitat All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Where rock placement is used, ensure clean rock is used.

Reduces/removes risk of contamination from materials.

Tidal Monitoring Operation & Maintenance Marine Non-Native Species (MNNS) Reptiles All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Monitoring and reporting of MNNS.

Reduces/removes risk of transfer of non-native species.

Tidal Mitigation Decommissioning Marine Non-Native Species (MNNS) Habitat All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Establish and implement a Biofouling Management Plan.

Reduce/remove risk of transfer and settlement of non-native species.

Tidal Mitigation Installation Contamination Benthic All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Material selection - lubricants, coolants, hydraulic fluids etc. selected with low ecotoxicity levels and biodegradable.

Reduces/removes risk of contamination from materials which may have escaped structure. However, use of lower toxicity may compromise performance, or impact other technical issues (e.g. fluid changes).

Tidal Compliance Installation Marine Non-Native Species (MNNS) Benthic All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Monitoring and reporting of MNNS.

Reduce/removes risk of transfer of non-native species.

Tidal Mitigation Installation Marine Non-Native Species (MNNS) Benthic All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Establish and implement a Biofouling Management Plan.

Reduce/remove risk of transfer of non-native species.

Wave Monitoring Operation & Maintenance Habitat creation Birds All receptors

The introduction of infrastructure and artificial substrates will provide habitat and artificial refuges.

Monitor near-field behaviours.

Informs understanding of potential positive impacts from colonisation and use of the project infrastructure which could benefit future project applications, however there is a cost implication associated with monitoring.

Wave Mitigation Installation Contamination Birds All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Where rock placement is used, ensure clean rock is used.

Reduces/removes risk of contamination from materials.

Wave Mitigation Operation & Maintenance Marine Non-Native Species (MNNS) Birds All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Source vessels locally.

Reduce/remove risk of transfer of non-native species.

Tidal Mitigation Operation & Maintenance Contamination Fish All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Material selection - lubricants, coolants, hydraulic fluids etc. selected with low ecotoxicity levels and biodegradable.

Reduces/removes risk of contamination from materials which may have escaped structure. Alrhough, use of lower toxicity materials may compromise performance, or impact other technical issues (e.g. fluid changes).

Tidal Monitoring Operation & Maintenance Habitat creation Fish All receptors

The introduction of infrastructure and artificial substrates will provide habitat and artificial refuges.

Monitor near-field behaviours.

Informs understanding of potential positive impacts from colonisation and use of the project infrastructure which could benefit future project applications. However, there is a cost implication associated with monitoring.

Wave Mitigation Decommissioning Marine Non-Native Species (MNNS) Fish All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Adhere to appropriate measures when jettisoning ballast water.

Reduce/removes risk of transfer of non-native species.

Wave Design feature Operation & Maintenance Contamination Marine Mammals All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Physical Containment systems including bulk heads, closed circuit systems, pressure relief systems.

Reduces risk of contamination escaping from structure.

Wave Compliance Installation Marine Non-Native Species (MNNS) Marine Mammals All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Adhere to appropriate measures when jettisoning ballast water.

Reduce/remove risk of transfer of non-native species.

Tidal Mitigation Decommissioning Changes in sediment dynamics Reptiles All receptors

Sediment disturbance disrupting water clarity that results in smothering of fish spawning grounds.

Best practice methodologies to reduce resuspension of sediment during cable burial or device foundation / mooring installation.

n/a

Wave Compliance Installation Marine Non-Native Species (MNNS) Reptiles All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Adhere to appropriate measures when jettisoning ballast water.

Reduces/removes risk of transfer and settlement of non-native species.

Tidal Mitigation Installation Marine Non-Native Species (MNNS) Habitat All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Source vessels locally.

Reduce/remove risk of transfer and settlement of non-native species.

Tidal Monitoring Operation & Maintenance Habitat creation Habitat All receptors

The introduction of infrastructure and artificial substrates will provide habitat and artificial refuges.

Monitor near-field behaviours.

Informs understanding of potential for colonisation, however there is a cost implication associated with monitoring.

Tidal Mitigation Installation Changes in sediment dynamics Benthic All receptors

Reduced visibility from altered water clarity associated with sediment mixing that can impact prey detection and obstruction avoidance.

Best practice methodologies to reduce resuspension of sediment during cable burial or device foundation / mooring installation.

n/a

Wave Compliance Operation & Maintenance Marine Non-Native Species (MNNS) Benthic All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Compliance with all relevant guidance (including IMO guidelines) regarding ballast water management and transfer of non-native species.

Reduce/remove risk of transfer and settlement of non-native species.

Wave Mitigation Decommissioning Marine Non-Native Species (MNNS) Birds All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Establish and implement a Biofouling Management Plan.

Reduce/remove risk of transfer of non-native species.

Wave Mitigation Decommissioning Changes in sediment dynamics Fish All receptors

Sediment disturbance disrupting water clarity that results in smothering of fish spawning grounds.

Best practice methodologies to reduce resuspension of sediment during cable burial or device foundation / mooring installation.

n/a

Tidal Mitigation Decommissioning Changes in sediment dynamics Marine Mammals All receptors

Reduced visibility impacting prey detection and obstruction avoidance.

Best practice methodologies to reduce resuspension of sediment during cable burial or device foundation / mooring installation.

n/a

Tidal Mitigation Decommissioning Marine Non-Native Species (MNNS) Fish All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Source vessels locally.

Reduce/removes risk of transfer of non-native species.

Tidal Mitigation Operation & Maintenance Contamination Marine Mammals All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Where rock placement is used, ensure clean rock is used.

Reduces/removes risk of contamination from materials.

Tidal Compliance Installation Marine Non-Native Species (MNNS) Marine Mammals All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Compliance with all relevant guidance (including IMO guidelines) regarding ballast water management and transfer of non-native species.

Reduces/removes risk of transfer and settlement of non-native species.

Wave Compliance Installation Marine Non-Native Species (MNNS) Reptiles All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Compliance with all relevant guidance (including IMO guidelines) regarding ballast water management and transfer of non-native species.

Reduces/removes risk of transfer and settlement of non-native species.

Wave Mitigation Decommissioning Contamination Reptiles All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Where rock placement is used, ensure clean rock is used.

Reduces/removes risk of contamination from materials.

Wave Mitigation Decommissioning Contamination Habitat All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Where rock placement is used, ensure clean rock is used.

Reduces/removes risk of contamination from materials.

Tidal Monitoring Installation Marine Non-Native Species (MNNS) Reptiles All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Monitoring and reporting of MNNS.

Reduces/removes risk of transfer of non-native species.

Tidal Mitigation Operation & Maintenance Marine Non-Native Species (MNNS) Habitat All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Establish and implement a Biofouling Management Plan.

Reduce/remove risk of transfer and settlement of non-native species.

Wave Mitigation Decommissioning Contamination Benthic All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Material selection - lubricants, coolants, hydraulic fluids etc. selected with low ecotoxicity levels and biodegradable.

Reduces/removes risk of contamination from materials which may have escaped structure. However, use of lower toxicity may compromise performance, or impact other technical issues (e.g. fluid changes).

Wave Compliance Decommissioning Marine Non-Native Species (MNNS) Benthic All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Monitoring and reporting of MNNS.

Reduce/removes risk of transfer of non-native species.

Wave Mitigation Decommissioning Marine Non-Native Species (MNNS) Benthic All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Establish and implement a Biofouling Management Plan.

Reduce/remove risk of transfer of non-native species.

Tidal Mitigation Decommissioning Contamination Birds All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Material selection - lubricants, coolants, hydraulic fluids etc. selected with low ecotoxicity levels and biodegradable.

Reduces/removes risk of contamination from materials which may have escaped structure. However, use of lower toxicity may compromise performance, or impact other technical issues (e.g. fluid changes).

Wave Mitigation Installation Marine Non-Native Species (MNNS) Birds All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Source vessels locally.

Reduce/remove risk of transfer of non-native species.

Tidal Mitigation Installation Contamination Fish All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Material selection - lubricants, coolants, hydraulic fluids etc. selected with low ecotoxicity levels and biodegradable.

Reduces/removes risk of contamination from materials which may have escaped structure. Alrhough, use of lower toxicity materials may compromise performance, or impact other technical issues (e.g. fluid changes).

Wave Monitoring Operation & Maintenance Habitat creation Fish All receptors

The introduction of infrastructure and artificial substrates will provide habitat and artificial refuges.

Monitor near-field behaviours.

Informs understanding of potential positive impacts from colonisation and use of the project infrastructure which could benefit future project applications. However, there is a cost implication associated with monitoring.

Wave Mitigation Operation & Maintenance Marine Non-Native Species (MNNS) Fish All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Adhere to appropriate measures when jettisoning ballast water.

Reduce/removes risk of transfer of non-native species.

Wave Design feature Installation Contamination Marine Mammals All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Physical Containment systems including bulk heads, closed circuit systems, pressure relief systems.

Reduces risk of contamination escaping from structure.

Tidal Mitigation Decommissioning Marine Non-Native Species (MNNS) Marine Mammals All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Adhere to appropriate measures when jettisoning ballast water.

Reduce/remove risk of transfer of non-native species.

Tidal Mitigation Installation Changes in sediment dynamics Reptiles All receptors

Sediment disturbance disrupting water clarity that results in smothering of fish spawning grounds.

Best practice methodologies to reduce resuspension of sediment during cable burial or device foundation / mooring installation.

n/a

Tidal Mitigation Decommissioning Marine Non-Native Species (MNNS) Reptiles All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Adhere to appropriate measures when jettisoning ballast water.

Reduces/removes risk of transfer and settlement of non-native species.

Wave Mitigation Decommissioning Marine Non-Native Species (MNNS) Habitat All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Source vessels locally.

Reduce/remove risk of transfer and settlement of non-native species.

Wave Monitoring Operation & Maintenance Habitat creation Habitat All receptors

The introduction of infrastructure and artificial substrates will provide habitat and artificial refuges.

Monitor near-field behaviours.

Informs understanding of potential for colonisation, however there is a cost implication associated with monitoring.

Wave Mitigation Decommissioning Changes in sediment dynamics Benthic All receptors

Reduced visibility from altered water clarity associated with sediment mixing that can impact prey detection and obstruction avoidance.

Best practice methodologies to reduce resuspension of sediment during cable burial or device foundation / mooring installation.

n/a

Wave Compliance Installation Marine Non-Native Species (MNNS) Benthic All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Compliance with all relevant guidance (including IMO guidelines) regarding ballast water management and transfer of non-native species.

Reduce/remove risk of transfer and settlement of non-native species.

Tidal Compliance Installation Contamination Birds All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Management: Establish and implement a Contamination Control Plan / Ship Oil Contamination Emergency Plans (SOPEPs).

Compliance with International Maritime Organisation (IMO) and Maritime Coastguard Agency (MCA) codes for the prevention of contamination.

Reduces risk of any contamination event and ensures that contingency plans are in place. Demonstrates compliance with environmental management systems.

Tidal Mitigation Decommissioning Changes in sediment dynamics Birds All receptors

Sediment disturbance disrupting water clarity that results in smothering of fish spawning grounds.

Best practice methodologies to reduce resuspension of sediment during cable burial or device foundation / mooring installation.

n/a

Tidal Mitigation Installation Changes in sediment dynamics Marine Mammals All receptors

Reduced visibility impacting prey detection and obstruction avoidance.

Best practice methodologies to reduce resuspension of sediment during cable burial or device foundation / mooring installation.

n/a

Tidal Mitigation Operation & Maintenance Marine Non-Native Species (MNNS) Fish All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Source vessels locally.

Reduce/removes risk of transfer of non-native species.

Tidal Mitigation Installation Contamination Marine Mammals All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Where rock placement is used, ensure clean rock is used.

Reduces/removes risk of contamination from materials.

Wave Compliance Decommissioning Marine Non-Native Species (MNNS) Marine Mammals All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Compliance with all relevant guidance (including IMO guidelines) regarding ballast water management and transfer of non-native species.

Reduces/removes risk of transfer and settlement of non-native species.

Tidal Monitoring Operation & Maintenance Habitat creation Reptiles All receptors

The introduction of infrastructure and artificial substrates will provide habitat and artificial refuges.

Monitor near-field behaviours.

Informs understanding of potential positive impacts from colonisation and use of the project infrastructure which could benefit future project applications. However, there is a cost implication associated with monitoring.

Wave Mitigation Operation & Maintenance Contamination Reptiles All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Where rock placement is used, ensure clean rock is used.

Reduces/removes risk of contamination from materials.

Wave Mitigation Operation & Maintenance Contamination Habitat All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Where rock placement is used, ensure clean rock is used.

Reduces/removes risk of contamination from materials.

Wave Monitoring Decommissioning Marine Non-Native Species (MNNS) Reptiles All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Monitoring and reporting of MNNS.

Reduces/removes risk of transfer of non-native species.

Tidal Mitigation Installation Marine Non-Native Species (MNNS) Habitat All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Establish and implement a Biofouling Management Plan.

Reduce/remove risk of transfer and settlement of non-native species.

Wave Mitigation Operation & Maintenance Contamination Benthic All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Material selection - lubricants, coolants, hydraulic fluids etc. selected with low ecotoxicity levels and biodegradable.

Reduces/removes risk of contamination from materials which may have escaped structure. However, use of lower toxicity may compromise performance, or impact other technical issues (e.g. fluid changes).

Wave Compliance Operation & Maintenance Marine Non-Native Species (MNNS) Benthic All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Monitoring and reporting of MNNS.

Reduce/removes risk of transfer of non-native species.

Wave Mitigation Operation & Maintenance Marine Non-Native Species (MNNS) Benthic All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Establish and implement a Biofouling Management Plan.

Reduce/remove risk of transfer of non-native species.

Tidal Mitigation Operation & Maintenance Contamination Birds All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Material selection - lubricants, coolants, hydraulic fluids etc. selected with low ecotoxicity levels and biodegradable.

Reduces/removes risk of contamination from materials which may have escaped structure. However, use of lower toxicity may compromise performance, or impact other technical issues (e.g. fluid changes).

Tidal Compliance Decommissioning Marine Non-Native Species (MNNS) Birds All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Adhere to appropriate measures when jettisoning ballast water.

Reduce/remove risk of transfer of non-native species.

Wave Mitigation Decommissioning Contamination Fish All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Material selection - lubricants, coolants, hydraulic fluids etc. selected with low ecotoxicity levels and biodegradable.

Reduces/removes risk of contamination from materials which may have escaped structure. Alrhough, use of lower toxicity materials may compromise performance, or impact other technical issues (e.g. fluid changes).

Wave Mitigation Installation Marine Non-Native Species (MNNS) Fish All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Adhere to appropriate measures when jettisoning ballast water.

Reduce/removes risk of transfer of non-native species.

Tidal Mitigation Operation & Maintenance Marine Non-Native Species (MNNS) Marine Mammals All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Adhere to appropriate measures when jettisoning ballast water.

Reduce/remove risk of transfer of non-native species.

Tidal Compliance Decommissioning Contamination Reptiles All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Management: Establish and implement a Contamination Control Plan / Ship Oil Contamination Emergency Plans (SOPEPs).

Compliance with International Maritime Organisation (IMO) and Maritime Coastguard Agency (MCA) codes for the prevention of contamination.

Reduces risk of any contamination event and ensures that contingency plans are in place. Demonstrates compliance with environmental management systems.

Wave Mitigation Decommissioning Changes in sediment dynamics Reptiles All receptors

Sediment disturbance disrupting water clarity that results in smothering of fish spawning grounds.

Best practice methodologies to reduce resuspension of sediment during cable burial or device foundation / mooring installation.

n/a

Tidal Mitigation Operation & Maintenance Marine Non-Native Species (MNNS) Reptiles All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Adhere to appropriate measures when jettisoning ballast water.

Reduces/removes risk of transfer and settlement of non-native species.

Wave Mitigation Operation & Maintenance Marine Non-Native Species (MNNS) Habitat All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Source vessels locally.

Reduce/remove risk of transfer and settlement of non-native species.

Tidal Compliance Decommissioning Contamination Benthic All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Management: Establish and implement a Contamination Control Plan / Ship Oil Contamination Emergency Plans (SOPEPs).

Compliance with International Maritime Organization (IMO) and Maritime Coastguard Agency (MCA) codes for the prevention of contamination.

Reduces risk of any contamination event and ensures that contingency plans are in place. Demonstrates compliance with environmental management systems.

Wave Mitigation Installation Changes in sediment dynamics Benthic All receptors

Reduced visibility from altered water clarity associated with sediment mixing that can impact prey detection and obstruction avoidance.

Best practice methodologies to reduce resuspension of sediment during cable burial or device foundation / mooring installation.

n/a

Tidal Mitigation Decommissioning Marine Non-Native Species (MNNS) Benthic All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Source vessels locally.

Reduce/remove risk of transfer of non-native species.

Wave Compliance Decommissioning Contamination Birds All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Management: Establish and implement a Contamination Control Plan / Ship Oil Contamination Emergency Plans (SOPEPs).

Compliance with International Maritime Organisation (IMO) and Maritime Coastguard Agency (MCA) codes for the prevention of contamination.

Reduces risk of any contamination event and ensures that contingency plans are in place. Demonstrates compliance with environmental management systems.

Tidal Mitigation Installation Changes in sediment dynamics Birds All receptors

Sediment disturbance disrupting water clarity that results in smothering of fish spawning grounds.

Best practice methodologies to reduce resuspension of sediment during cable burial or device foundation / mooring installation.

n/a

Wave Mitigation Operation & Maintenance Marine Non-Native Species (MNNS) Birds All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Establish and implement a Biofouling Management Plan.

Reduce/remove risk of transfer of non-native species.

Wave Mitigation Installation Changes in sediment dynamics Fish All receptors

Sediment disturbance disrupting water clarity that results in smothering of fish spawning grounds.

Best practice methodologies to reduce resuspension of sediment during cable burial or device foundation / mooring installation.

n/a

Wave Mitigation Decommissioning Contamination Marine Mammals All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Where rock placement is used, ensure clean rock is used.

Reduces/removes risk of contamination from materials.

Wave Compliance Operation & Maintenance Marine Non-Native Species (MNNS) Marine Mammals All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Compliance with all relevant guidance (including IMO guidelines) regarding ballast water management and transfer of non-native species.

Reduces/removes risk of transfer and settlement of non-native species.

Wave Monitoring Operation & Maintenance Habitat creation Reptiles All receptors

The introduction of infrastructure and artificial substrates will provide habitat and artificial refuges.

Monitor near-field behaviours.

Informs understanding of potential positive impacts from colonisation and use of the project infrastructure which could benefit future project applications. However, there is a cost implication associated with monitoring.

Wave Mitigation Installation Contamination Reptiles All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Where rock placement is used, ensure clean rock is used.

Reduces/removes risk of contamination from materials.

Wave Mitigation Installation Contamination Habitat All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Where rock placement is used, ensure clean rock is used.

Reduces/removes risk of contamination from materials.

Wave Monitoring Operation & Maintenance Marine Non-Native Species (MNNS) Reptiles All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Monitoring and reporting of MNNS.

Reduces/removes risk of transfer of non-native species.

Wave Mitigation Decommissioning Marine Non-Native Species (MNNS) Habitat All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Establish and implement a Biofouling Management Plan.

Reduce/remove risk of transfer and settlement of non-native species.

Wave Mitigation Installation Contamination Benthic All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Material selection - lubricants, coolants, hydraulic fluids etc. selected with low ecotoxicity levels and biodegradable.

Reduces/removes risk of contamination from materials which may have escaped structure. However, use of lower toxicity may compromise performance, or impact other technical issues (e.g. fluid changes).

Wave Compliance Installation Marine Non-Native Species (MNNS) Benthic All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Monitoring and reporting of MNNS.

Reduce/removes risk of transfer of non-native species.

Wave Mitigation Installation Marine Non-Native Species (MNNS) Benthic All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Establish and implement a Biofouling Management Plan.

Reduce/remove risk of transfer of non-native species.

Tidal Mitigation Installation Contamination Birds All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Material selection - lubricants, coolants, hydraulic fluids etc. selected with low ecotoxicity levels and biodegradable.

Reduces/removes risk of contamination from materials which may have escaped structure. However, use of lower toxicity may compromise performance, or impact other technical issues (e.g. fluid changes).

Tidal Compliance Operation & Maintenance Marine Non-Native Species (MNNS) Birds All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Adhere to appropriate measures when jettisoning ballast water.

Reduce/remove risk of transfer of non-native species.

Wave Mitigation Operation & Maintenance Contamination Fish All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Material selection - lubricants, coolants, hydraulic fluids etc. selected with low ecotoxicity levels and biodegradable.

Reduces/removes risk of contamination from materials which may have escaped structure. Alrhough, use of lower toxicity materials may compromise performance, or impact other technical issues (e.g. fluid changes).

Tidal Mitigation Decommissioning Marine Non-Native Species (MNNS) Fish All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Establish and implement a Biofouling Management Plan.

Reduce/removes risk of transfer of non-native species.

Tidal Mitigation Installation Marine Non-Native Species (MNNS) Marine Mammals All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Adhere to appropriate measures when jettisoning ballast water.

Reduce/remove risk of transfer of non-native species.

Tidal Compliance Operation & Maintenance Contamination Reptiles All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Management: Establish and implement a Contamination Control Plan / Ship Oil Contamination Emergency Plans (SOPEPs).

Compliance with International Maritime Organisation (IMO) and Maritime Coastguard Agency (MCA) codes for the prevention of contamination.

Reduces risk of any contamination event and ensures that contingency plans are in place. Demonstrates compliance with environmental management systems.

Wave Mitigation Installation Changes in sediment dynamics Reptiles All receptors

Sediment disturbance disrupting water clarity that results in smothering of fish spawning grounds.

Best practice methodologies to reduce resuspension of sediment during cable burial or device foundation / mooring installation.

n/a

Tidal Mitigation Installation Marine Non-Native Species (MNNS) Reptiles All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Adhere to appropriate measures when jettisoning ballast water.

Reduces/removes risk of transfer and settlement of non-native species.

Wave Mitigation Installation Marine Non-Native Species (MNNS) Habitat All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Source vessels locally.

Reduce/remove risk of transfer and settlement of non-native species.

Tidal Compliance Decommissioning Contamination Habitat All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Management: Establish and implement a Contamination Control Plan / Ship Oil Contamination Emergency Plans (SOPEPs).

Compliance with International Maritime Organisation (IMO) and Maritime Coastguard Agency (MCA) codes for the prevention of contamination.

Reduces risk of any contamination event and ensures that contingency plans are in place. Demonstrates compliance with environmental management systems.

Tidal Compliance Operation & Maintenance Contamination Benthic All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Management: Establish and implement a Contamination Control Plan / Ship Oil Contamination Emergency Plans (SOPEPs).

Compliance with International Maritime Organization (IMO) and Maritime Coastguard Agency (MCA) codes for the prevention of contamination.

Reduces risk of any contamination event and ensures that contingency plans are in place. Demonstrates compliance with environmental management systems.

Tidal Mitigation Operation & Maintenance Marine Non-Native Species (MNNS) Benthic All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Source vessels locally.

Reduce/remove risk of transfer of non-native species.

Wave Compliance Operation & Maintenance Contamination Birds All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Management: Establish and implement a Contamination Control Plan / Ship Oil Contamination Emergency Plans (SOPEPs).

Compliance with International Maritime Organisation (IMO) and Maritime Coastguard Agency (MCA) codes for the prevention of contamination.

Reduces risk of any contamination event and ensures that contingency plans are in place. Demonstrates compliance with environmental management systems.

Wave Mitigation Decommissioning Changes in sediment dynamics Birds All receptors

Sediment disturbance disrupting water clarity that results in smothering of fish spawning grounds.

Best practice methodologies to reduce resuspension of sediment during cable burial or device foundation / mooring installation.

n/a

Wave Mitigation Installation Marine Non-Native Species (MNNS) Birds All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Establish and implement a Biofouling Management Plan.

Reduce/remove risk of transfer of non-native species.

Tidal Compliance Decommissioning Contamination Fish All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Management: Establish and implement a Contamination Control Plan / Ship Oil Contamination Emergency Plans (SOPEPs).

Compliance with International Maritime Organisation (IMO) and Maritime Coastguard Agency (MCA) codes for the prevention of contamination.

Reduces risk of any contamination event and ensures that contingency plans are in place. Demonstrates compliance with environmental management systems.

Tidal Mitigation Decommissioning Changes in sediment dynamics Fish All receptors

Reduced visibility impacting prey detection and obstruction avoidance.

Best practice methodologies to reduce resuspension of sediment during cable burial or device foundation / mooring installation.

n/a

Wave Mitigation Decommissioning Changes in sediment dynamics Marine Mammals All receptors

Reduced visibility impacting prey detection and obstruction avoidance.

Best practice methodologies to reduce resuspension of sediment during cable burial or device foundation / mooring installation.

n/a

Tidal Mitigation Installation Marine Non-Native Species (MNNS) Fish All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Source vessels locally.

Reduce/removes risk of transfer of non-native species.

Tidal Mitigation Decommissioning Contamination Reptiles All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Material selection - lubricants, coolants, hydraulic fluids etc. selected with low ecotoxicity levels and biodegradable.

Reduces/removes risk of contamination from materials which may have escaped structure. Although, use of lower toxicity materials may compromise performance, or impact other technical issues (e.g. fluid changes).

Tidal Mitigation Decommissioning Contamination Habitat All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Material selection - lubricants, coolants, hydraulic fluids etc. selected with low ecotoxicity levels and biodegradable.

Reduces/removes risk of contamination from materials which may have escaped structure. However, the use of lower toxicity materials may compromise performance, or impact other technical issue (e.g. fluuid changes).

Wave Monitoring Installation Marine Non-Native Species (MNNS) Reptiles All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Monitoring and reporting of MNNS.

Reduces/removes risk of transfer of non-native species.

Wave Mitigation Operation & Maintenance Marine Non-Native Species (MNNS) Habitat All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Establish and implement a Biofouling Management Plan.

Reduce/remove risk of transfer and settlement of non-native species.

Tidal Design feature Decommissioning Contamination Benthic All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Physical Containment systems including bulk heads, closed circuit systems, pressure relief systems.

Reduces risk of contamination escaping from structure.

Tidal Monitoring Decommissioning Marine Non-Native Species (MNNS) Benthic All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Monitoring and reporting of MNNS.

Reduce/removes risk of transfer of non-native species.

Wave Mitigation Decommissioning Contamination Birds All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Material selection - lubricants, coolants, hydraulic fluids etc. selected with low ecotoxicity levels and biodegradable.

Reduces/removes risk of contamination from materials which may have escaped structure. However, use of lower toxicity may compromise performance, or impact other technical issues (e.g. fluid changes).

Tidal Compliance Installation Marine Non-Native Species (MNNS) Birds All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Adhere to appropriate measures when jettisoning ballast water.

Reduce/remove risk of transfer of non-native species.

Wave Mitigation Installation Contamination Fish All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Material selection - lubricants, coolants, hydraulic fluids etc. selected with low ecotoxicity levels and biodegradable.

Reduces/removes risk of contamination from materials which may have escaped structure. Alrhough, use of lower toxicity materials may compromise performance, or impact other technical issues (e.g. fluid changes).

Tidal Mitigation Installation Marine Non-Native Species (MNNS) Fish All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Establish and implement a Biofouling Management Plan.

Reduce/removes risk of transfer of non-native species.

Tidal Mitigation Operation & Maintenance Marine Non-Native Species (MNNS) Fish All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Establish and implement a Biofouling Management Plan.

Reduce/removes risk of transfer of non-native species.

Tidal Compliance Decommissioning Contamination Marine Mammals All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Management: Establish and implement a Contamination Control Plan / Ship Oil Contamination Emergency Plans (SOPEPs).

Compliance with International Maritime Organisation (IMO) and Maritime Coastguard Agency (MCA) codes for the prevention of contamination.

Reduces risk of any contamination event, ensures that contingency plans are in place and demonstrates compliance with environmental management systems.

Wave Mitigation Decommissioning Marine Non-Native Species (MNNS) Marine Mammals All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Adhere to appropriate measures when jettisoning ballast water.

Reduce/remove risk of transfer of non-native species.

Tidal Compliance Installation Contamination Reptiles All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Management: Establish and implement a Contamination Control Plan / Ship Oil Contamination Emergency Plans (SOPEPs).

Compliance with International Maritime Organisation (IMO) and Maritime Coastguard Agency (MCA) codes for the prevention of contamination.

Reduces risk of any contamination event and ensures that contingency plans are in place. Demonstrates compliance with environmental management systems.

Tidal Mitigation Decommissioning Changes in sediment dynamics Reptiles All receptors

Reduced visibility impacting prey detection and obstruction avoidance.

Best practice methodologies to reduce resuspension of sediment during cable burial or device foundation / mooring installation.

n/a

Wave Mitigation Decommissioning Marine Non-Native Species (MNNS) Reptiles All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Adhere to appropriate measures when jettisoning ballast water.

Reduces/removes risk of transfer and settlement of non-native species.

Tidal Compliance Decommissioning Marine Non-Native Species (MNNS) Habitat All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Adhere to appropriate measures when jettisoning ballast water.

Reduce/remove risk of transfer and settlement of non-native species.

Tidal Compliance Operation & Maintenance Contamination Habitat All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Management: Establish and implement a Contamination Control Plan / Ship Oil Contamination Emergency Plans (SOPEPs).

Compliance with International Maritime Organisation (IMO) and Maritime Coastguard Agency (MCA) codes for the prevention of contamination.

Reduces risk of any contamination event and ensures that contingency plans are in place. Demonstrates compliance with environmental management systems.

Tidal Compliance Installation Contamination Benthic All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Management: Establish and implement a Contamination Control Plan / Ship Oil Contamination Emergency Plans (SOPEPs).

Compliance with International Maritime Organization (IMO) and Maritime Coastguard Agency (MCA) codes for the prevention of contamination.

Reduces risk of any contamination event and ensures that contingency plans are in place. Demonstrates compliance with environmental management systems.

Tidal Mitigation Installation Marine Non-Native Species (MNNS) Benthic All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Source vessels locally.

Reduce/remove risk of transfer of non-native species.

Tidal Monitoring Operation & Maintenance Habitat creation Benthic All receptors

The introduction of infrastructure and artificial substrates will provide habitat and artificial refuges.

Monitor near-field behaviors .

Informs understanding of potential positive impacts from colonization and use of the project infrastructure which could benefit future project applications, however there is a cost implication associated with monitoring.

Wave Compliance Installation Contamination Birds All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Management: Establish and implement a Contamination Control Plan / Ship Oil Contamination Emergency Plans (SOPEPs).

Compliance with International Maritime Organisation (IMO) and Maritime Coastguard Agency (MCA) codes for the prevention of contamination.

Reduces risk of any contamination event and ensures that contingency plans are in place. Demonstrates compliance with environmental management systems.

Wave Mitigation Installation Changes in sediment dynamics Birds All receptors

Sediment disturbance disrupting water clarity that results in smothering of fish spawning grounds.

Best practice methodologies to reduce resuspension of sediment during cable burial or device foundation / mooring installation.

n/a

Tidal Monitoring Decommissioning Marine Non-Native Species (MNNS) Birds All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Monitoring and reporting of MNNS.

Reduce/removes risk of transfer of non-native species.

Tidal Compliance Decommissioning Marine Non-Native Species (MNNS) Birds All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Compliance with all relevant guidance (including IMO guidelines) regarding ballast water management and transfer of non-native species.

Would remove/reduce risk of transfer and settlement of non-native species.

Tidal Compliance Operation & Maintenance Contamination Fish All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Management: Establish and implement a Contamination Control Plan / Ship Oil Contamination Emergency Plans (SOPEPs).

Compliance with International Maritime Organisation (IMO) and Maritime Coastguard Agency (MCA) codes for the prevention of contamination.

Reduces risk of any contamination event and ensures that contingency plans are in place. Demonstrates compliance with environmental management systems.

Tidal Mitigation Installation Changes in sediment dynamics Fish All receptors

Reduced visibility impacting prey detection and obstruction avoidance.

Best practice methodologies to reduce resuspension of sediment during cable burial or device foundation / mooring installation.

n/a

Wave Mitigation Installation Changes in sediment dynamics Marine Mammals All receptors

Reduced visibility impacting prey detection and obstruction avoidance.

Best practice methodologies to reduce resuspension of sediment during cable burial or device foundation / mooring installation.

n/a

Wave Mitigation Decommissioning Marine Non-Native Species (MNNS) Fish All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Source vessels locally.

Reduce/removes risk of transfer of non-native species.

Wave Mitigation Operation & Maintenance Contamination Marine Mammals All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Where rock placement is used, ensure clean rock is used.

Reduces/removes risk of contamination from materials.

Wave Compliance Installation Marine Non-Native Species (MNNS) Marine Mammals All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Compliance with all relevant guidance (including IMO guidelines) regarding ballast water management and transfer of non-native species.

Reduces/removes risk of transfer and settlement of non-native species.

Tidal Mitigation Operation & Maintenance Entrapment Reptiles All receptors

Potential risk of entrapment within device chambers and mooring arrays.

Release entrapped animal.

n/a

Wave Mitigation Installation Marine Non-Native Species (MNNS) Habitat All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Establish and implement a Biofouling Management Plan.

Reduce/remove risk of transfer and settlement of non-native species.

Tidal Design feature Operation & Maintenance Contamination Benthic All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Physical Containment systems including bulk heads, closed circuit systems, pressure relief systems.

Reduces risk of contamination escaping from structure.

Tidal Monitoring Operation & Maintenance Marine Non-Native Species (MNNS) Benthic All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Monitoring and reporting of MNNS.

Reduce/removes risk of transfer of non-native species.

Wave Mitigation Operation & Maintenance Contamination Birds All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Material selection - lubricants, coolants, hydraulic fluids etc. selected with low ecotoxicity levels and biodegradable.

Reduces/removes risk of contamination from materials which may have escaped structure. However, use of lower toxicity may compromise performance, or impact other technical issues (e.g. fluid changes).

Wave Compliance Decommissioning Marine Non-Native Species (MNNS) Birds All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Adhere to appropriate measures when jettisoning ballast water.

Reduce/remove risk of transfer of non-native species.

Tidal Design feature Decommissioning Contamination Fish All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Physical Containment systems including bulk heads, closed circuit systems, pressure relief systems.

Reduces risk of contamination escaping from structure.

Wave Mitigation Decommissioning Marine Non-Native Species (MNNS) Fish All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Establish and implement a Biofouling Management Plan.

Reduce/removes risk of transfer of non-native species.

Tidal Compliance Operation & Maintenance Contamination Marine Mammals All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Management: Establish and implement a Contamination Control Plan / Ship Oil Contamination Emergency Plans (SOPEPs).

Compliance with International Maritime Organisation (IMO) and Maritime Coastguard Agency (MCA) codes for the prevention of contamination.

Reduces risk of any contamination event, ensures that contingency plans are in place and demonstrates compliance with environmental management systems.

Wave Mitigation Operation & Maintenance Marine Non-Native Species (MNNS) Marine Mammals All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Adhere to appropriate measures when jettisoning ballast water.

Reduce/remove risk of transfer of non-native species.

Wave Compliance Decommissioning Contamination Reptiles All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Management: Establish and implement a Contamination Control Plan / Ship Oil Contamination Emergency Plans (SOPEPs).

Compliance with International Maritime Organisation (IMO) and Maritime Coastguard Agency (MCA) codes for the prevention of contamination.

Reduces risk of any contamination event and ensures that contingency plans are in place. Demonstrates compliance with environmental management systems.

Tidal Mitigation Installation Changes in sediment dynamics Reptiles All receptors

Reduced visibility impacting prey detection and obstruction avoidance.

Best practice methodologies to reduce resuspension of sediment during cable burial or device foundation / mooring installation.

n/a

Tidal Mitigation Decommissioning Changes in sediment dynamics Habitat All receptors

Sediment disturbance disrupting water clarity that results in smothering of fish spawning grounds.

Best practice methodologies to reduce resuspension of sediment during cable burial or device foundation / mooring installation.

n/a

Wave Mitigation Operation & Maintenance Marine Non-Native Species (MNNS) Reptiles All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Adhere to appropriate measures when jettisoning ballast water.

Reduces/removes risk of transfer and settlement of non-native species.

Tidal Compliance Operation & Maintenance Marine Non-Native Species (MNNS) Habitat All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Adhere to appropriate measures when jettisoning ballast water.

Reduce/remove risk of transfer and settlement of non-native species.

Tidal Compliance Installation Contamination Habitat All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Management: Establish and implement a Contamination Control Plan / Ship Oil Contamination Emergency Plans (SOPEPs).

Compliance with International Maritime Organisation (IMO) and Maritime Coastguard Agency (MCA) codes for the prevention of contamination.

Reduces risk of any contamination event and ensures that contingency plans are in place. Demonstrates compliance with environmental management systems.

Wave Compliance Decommissioning Contamination Benthic All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Management: Establish and implement a Contamination Control Plan / Ship Oil Contamination Emergency Plans (SOPEPs).

Compliance with International Maritime Organization (IMO) and Maritime Coastguard Agency (MCA) codes for the prevention of contamination.

Reduces risk of any contamination event and ensures that contingency plans are in place. Demonstrates compliance with environmental management systems.

Wave Mitigation Decommissioning Marine Non-Native Species (MNNS) Benthic All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Source vessels locally.

Reduce/remove risk of transfer of non-native species.

Wave Monitoring Operation & Maintenance Habitat creation Benthic All receptors

The introduction of infrastructure and artificial substrates will provide habitat and artificial refuges.

Monitor near-field behaviors .

Informs understanding of potential positive impacts from colonization and use of the project infrastructure which could benefit future project applications, however there is a cost implication associated with monitoring.

Tidal Mitigation Decommissioning Contamination Birds All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Management: Establish and implement a Contamination Control Plan / Ship Oil Contamination Emergency Plans (SOPEPs).

Compliance with International Maritime Organisation (IMO) and Maritime Coastguard Agency (MCA) codes for the prevention of contamination.

Reduces risk of any contamination event and ensures that contingency plans are in place. Demonstrates compliance with environmental management systems.

Tidal Mitigation Decommissioning Changes in sediment dynamics Birds All receptors

Reduced visibility impacting prey detection and obstruction avoidance.

Best practice methodologies to reduce resuspension of sediment during cable burial or device foundation / mooring installation.

n/a

Tidal Monitoring Operation & Maintenance Marine Non-Native Species (MNNS) Birds All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Monitoring and reporting of MNNS.

Reduce/removes risk of transfer of non-native species.

Tidal Compliance Operation & Maintenance Marine Non-Native Species (MNNS) Birds All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Compliance with all relevant guidance (including IMO guidelines) regarding ballast water management and transfer of non-native species.

Would remove/reduce risk of transfer and settlement of non-native species.

Tidal Compliance Installation Contamination Fish All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Management: Establish and implement a Contamination Control Plan / Ship Oil Contamination Emergency Plans (SOPEPs).

Compliance with International Maritime Organisation (IMO) and Maritime Coastguard Agency (MCA) codes for the prevention of contamination.

Reduces risk of any contamination event and ensures that contingency plans are in place. Demonstrates compliance with environmental management systems.

Wave Mitigation Decommissioning Changes in sediment dynamics Fish All receptors

Reduced visibility impacting prey detection and obstruction avoidance.

Best practice methodologies to reduce resuspension of sediment during cable burial or device foundation / mooring installation.

n/a

Tidal None identified Operation & Maintenance Barrier to movement Marine Mammals All receptors

Potential barrier to movement due to the physical presence of devices and associated moorings / support structures, cables and electrical equipment.

None identified.

n/a

Wave Mitigation Operation & Maintenance Marine Non-Native Species (MNNS) Fish All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Source vessels locally.

Reduce/removes risk of transfer of non-native species.

Wave Mitigation Installation Contamination Marine Mammals All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Where rock placement is used, ensure clean rock is used.

Reduces/removes risk of contamination from materials.

Tidal Mitigation Decommissioning Marine Non-Native Species (MNNS) Marine Mammals All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Source vessels locally.

Reduce/remove risk of transfer of non-native species.

Wave Mitigation Operation & Maintenance Entrapment Reptiles All receptors

Potential risk of entrapment within device chambers and mooring arrays.

Release entrapped animal.

n/a

Tidal Mitigation Operation & Maintenance Contamination Reptiles All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Material selection - lubricants, coolants, hydraulic fluids etc. selected with low ecotoxicity levels and biodegradable.

Reduces/removes risk of contamination from materials which may have escaped structure. Although, use of lower toxicity materials may compromise performance, or impact other technical issues (e.g. fluid changes).

Tidal Mitigation Operation & Maintenance Contamination Habitat All receptors

Potential for accidental or unplanned events which could lead to contamination of the marine environment.

Material selection - lubricants, coolants, hydraulic fluids etc. selected with low ecotoxicity levels and biodegradable.

Reduces/removes risk of contamination from materials which may have escaped structure. However, the use of lower toxicity materials may compromise performance, or impact other technical issue (e.g. fluuid changes).

Tidal Mitigation Decommissioning Marine Non-Native Species (MNNS) Reptiles All receptors

Potential for introduction of MNNS which can have an adverse impact on the native species at the site.

Source vessels locally.

Reduces/removes risk of transfer and settlement of non-native species.

Tidal None identified Operation & Maintenance Displacement Fish Basking shark

Potential displacement of essential activities due to the presence of devices and associated moorings / support structures

None identified.

n/a

Wave None identified Operation & Maintenance Displacement Fish Basking shark

Potential displacement of essential activities due to the presence of devices and associated moorings / support structures

None identified.

n/a

Tidal Design feature Operation & Maintenance Entanglement Fish Basking shark; Large fish

Potential for marine animals to become entangled in device mooring lines and cables.

Routine inspections of mooring lines.

Implement features into existing control systems to detect entanglement events.

Would remove/reduce risk of entanglement and is a low cost monitoring capability.

Wave Design feature Operation & Maintenance Entanglement Fish Basking shark; Large fish

Potential for marine animals to become entangled in device mooring lines and cables.

Routine inspections of mooring lines.

Implement features into existing control systems to detect entanglement events.

Would remove/reduce risk of entanglement and is a low cost monitoring capability.

Tidal Monitoring Operation & Maintenance Entanglement Fish Basking shark; Large fish

Potential for marine animals to become entangled in lost fishing gear or other equipment trapped on infrastructure.

Ensure standard notifications of loss of fishing gear in region notified to operators.

Reporting of entanglement events.

Good practice for emergency preparedness.

Wave Monitoring Operation & Maintenance Entanglement Fish Basking shark; Large fish

Potential for marine animals to become entangled in lost fishing gear or other equipment trapped on infrastructure.

Ensure standard notifications of loss of fishing gear in region notified to operators.

Reporting of entanglement events.

Good practice for emergency preparedness.

Tidal Monitoring Operation & Maintenance Entanglement Fish Basking shark; Large fish

Potential for marine animals to become entangled in device mooring lines and cables.

Fishing debris detected during routine inspections of mooring lines and cables will be removed.

Would remove/reduce risk of entanglement and is a low cost measure, implemented as part of standard O&M procedures.

Wave Monitoring Operation & Maintenance Entanglement Fish Basking shark; Large fish

Potential for marine animals to become entangled in device mooring lines and cables.

Fishing debris detected during routine inspections of mooring lines and cables will be removed.

Would remove/reduce risk of entanglement and is a low cost measure, implemented as part of standard O&M procedures.

Tidal Monitoring Operation & Maintenance Entanglement Fish Basking shark; Large fish

Potential for marine animals to become entangled in device mooring lines and cables.

Install tension sensors on mooring lines.

Informs of problem with mooring lines allowing rectification, however their implementation would come at an additional cost and would require control system integration.

Wave Monitoring Operation & Maintenance Entanglement Fish Basking shark; Large fish

Potential for marine animals to become entangled in device mooring lines and cables.

Install tension sensors on mooring lines.

Informs of problem with mooring lines allowing rectification, however their implementation would come at an additional cost and would require control system integration.

Tidal Design feature Operation & Maintenance Entanglement Fish Basking shark; Large fish

Potential for marine animals to become entangled in device mooring lines and cables.

Install tension sensors on mooring lines.

Informs of problem with mooring lines allowing rectification, however their implementation would come at an additional cost and would require control system integration.

Wave Design feature Operation & Maintenance Entanglement Fish Basking shark; Large fish

Potential for marine animals to become entangled in device mooring lines and cables.

Install tension sensors on mooring lines.

Informs of problem with mooring lines allowing rectification, however their implementation would come at an additional cost and would require control system integration.

Tidal Design feature Operation & Maintenance Entanglement Fish Basking shark; Large fish

Potential for marine animals to become entangled in device mooring lines and cables.

Cable design with maximum bend radius.

Would remove/reduce risk of entanglement, however cable design driven by technical and commercial consideration. Entanglement records are a useful way to track events.

Wave Design feature Operation & Maintenance Entanglement Fish Basking shark; Large fish

Potential for marine animals to become entangled in device mooring lines and cables.

Cable design with maximum bend radius.

Would remove/reduce risk of entanglement, however cable design driven by technical and commercial consideration. Entanglement records are a useful way to track events.

Tidal Design feature Operation & Maintenance Entanglement Fish Basking shark; Large fish

Potential for marine animals to become entangled in device mooring lines and cables.

Maintain taut mooring lines.

Would remove/reduce risk of entanglement, however mooring design driven by technical and commercial consideration. Entanglement records are a useful way to track events.

Tidal Mitigation Operation & Maintenance Entanglement Fish Basking shark; Large fish

Potential for marine animals to become entangled in lost fishing gear or other equipment trapped on infrastructure.

Fisheries management: Agreement with fishermen not to fish near to the device, warning of the dangers of losing equipment.

Reduces potential for entanglement of fishing gear in mooring lines and thus potential for entanglement of marine animals.

Wave Mitigation Operation & Maintenance Entanglement Fish Basking shark; Large fish

Potential for marine animals to become entangled in lost fishing gear or other equipment trapped on infrastructure.

Fisheries management: Agreement with fishermen not to fish near to the device, warning of the dangers of losing equipment.

Reduces potential for entanglement of fishing gear in mooring lines and thus potential for entanglement of marine animals.

Wave Design feature Operation & Maintenance Entanglement Fish Basking shark; Large fish

Potential for marine animals to become entangled in device mooring lines and cables.

Maintain taut mooring lines.

Would remove/reduce risk of entanglement, however mooring design driven by technical and commercial consideration. Entanglement records are a useful way to track events.

Tidal Monitoring Operation & Maintenance Entanglement Fish Basking shark; Large fish

Potential for marine animals to become entangled in device mooring lines and cables.

Routine inspections of mooring lines.

Implement features into existing control systems to detect entanglement events.

Would remove/reduce risk of entanglement and is a low cost monitoring capability.

Wave Monitoring Operation & Maintenance Entanglement Fish Basking shark; Large fish

Potential for marine animals to become entangled in device mooring lines and cables.

Routine inspections of mooring lines.

Implement features into existing control systems to detect entanglement events.

Would remove/reduce risk of entanglement and is a low cost monitoring capability.

Tidal None identified Operation & Maintenance