Marine Notice: Geophysical Site Survey for Inis Ealga Marine Energy Park

4th September 2022

The ILV Granuaile is carrying out the geophysical surveys at the proposed Inis Ealga Marine Energy Park off Cork and Waterford Credit: Commissioners of Irish Lights

DP Energy Ireland Ltd is undertaking geophysical surveys at the proposed Inis Ealga Marine Energy Park off Cork and Waterford, outside the 12-nautical-mile limit.

Works were set to begin on Friday 2 September and last for five days, subject to weather, carried out from the ILV Granuaile (callsign EIPT) on a 24-hour basis.

The reconnaissance geophysical survey is being performed using a hull-mounted multibeam echosounder (MBES) and towed seismic system (maximum towed length 60m), running widely spaced lines across the array investigation area.

Communication on marine band radio VHF Channel 16 will be conducted with other ships and vessels to notify them of the operations.

In addition, ILV Granuaile is restricted in its ability to manoeuvre during this operations and will display appropriate shapes and lights. All other vessels operating within this area are requested to keep their distance and pass at a minimum speed to reduce vessel wash.

Coordinates and a map of the survey area as well as contact details are included in Marine Notice No 60 of 2022, attached below.

DP Energy, one of Ireland’s leading developers of renewable energy projects, is planning to carry out a geophysical survey beyond the 12 nautical mile limit at their proposed Inis Ealga Marine Energy Park off the coasts of Cork and Waterford.

The survey, which will cover approximately 900 Km2, will begin on 8th September and will take place for a period of five days. The work will be undertaken by Hydrographic Surveys of Crosshaven onboard the Commissioners of Irish Lights vessel, ILV Granuaile, a multifunctional ship which is equipped to operate in difficult sea conditions.

The Inis Ealga Marine Energy Park is a 1,000 MW (1GW) offshore wind project which will use floating platform technology anchored to the seabed. Once operational, the proposed wind farm will generate enough clean renewable energy to power the equivalent of nearly one million homes. Delivery of this scheme, planned to be operational by 2030, will significantly contribute to Ireland’s Climate Action Plan target of 7 Gigawatts of offshore wind energy by 2030 and the longer-term target of net-zero emissions by 2050.

To develop the Inis Ealga Marine Energy Park project, DP Energy has partnered with global energy leader Iberdrola, one of the world’s largest renewable energy producers. Iberdrola has substantial experience in offshore wind development and, importantly, shares DP Energy’s commitment to a sustainable and ethical approach to development.

The upcoming survey of the Inis Ealga Marine Park location will provide valuable information on the make-up of the seabed and this will be used to inform the project design, siting of turbines and construction methods for the proposed park. The results will also assist in the preparation of specifications for additional future geophysical and geotechnical surveys.

Adam Cronin, Head of Offshore at DP Energy, outlines the processes that will be used:

“The equipment we are planning to use includes a hull mounted multibeam sonar and sub bottom profiler. This survey will provide information about the seabed make-up at various depths. We will be able to image the sediment and rock layers beneath the surface of the seabed giving us crucial information on sediment layers for design. The data obtained from the surveys will be utilised in the design of the project and the design will be in the public domain as part of the Development Consenting process.”

Commenting on the announcement Dave Ward, Commercial Manager at Commissioner of Irish Lights said: “Granuaile is a key asset of Irish Lights in delivery of its navigation safety service around the coast of Ireland. Irish Lights can provide a range of services, statutory and commercial to support local partners in the transition to offshore renewable energy. We are pleased to support DP Energy to enable and harness Irish natural resources in offshore wind, in order to drive the establishment of an indigenous Irish supply chain while underpinning marine based employment.”

Headquartered in Buttevant in North Cork and operating across the world, DP Energy is committed to using the most sustainable and environmentally responsible methods in all of their energy developments. Currently, DP Energy has a 5,000+ megawatt (MW) portfolio of wind, ocean and solar energy projects in development stages across Ireland, Australia, the UK and Canada.

In addition to the Inis Ealga project, DP Energy, in conjunction with Iberdrola, has also submitted Foreshore Licence applications for Clarus Offshore Wind Farm, off the coasts of Clare and Kerry (floating) and Shelmalere Offshore Wind Farm, off the coasts of Wicklow and Wexford (fixed).

Published in Power From the Sea

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Offshore Renewable Energy FAQs

What is offshore renewable energy?

Offshore renewable energy draws on the natural energy provided by wind, wave and tide to convert it into electricity for industry and domestic consumption.

Which resource has the most advanced technology?

Offshore wind is the most advanced technology, using fixed wind turbines in coastal areas, while floating wind is a developing technology more suited to deeper water. In 2018, offshore wind provided a tiny fraction of global electricity supply, but it is set to expand strongly in the coming decades into a USD 1 trillion business, according to the International Energy Agency (IEA). It says that turbines are growing in size and in power capacity, which in turn is "delivering major performance and cost improvements for offshore wind farms".

How big is offshore wind?

The global offshore wind market grew nearly 30% per year between 2010 and 2018, according to the IEA, due to rapid technology improvements, It calculated that about 150 new offshore wind projects are in active development around the world. Europe in particular has fostered the technology's development, led by Britain, Germany and Denmark, but China added more capacity than any other country in 2018.

How many offshore fixed and floating wind farms are planned for Irish waters?

A report for the Irish Wind Energy Assocation (IWEA) by the Carbon Trust – a British government-backed limited company established to accelerate Britain's move to a low carbon economy - says there are currently 14 fixed-bottom wind energy projects, four floating wind projects and one project that has yet to choose a technology at some stage of development in Irish waters. Some of these projects are aiming to build before 2030 to contribute to the 5GW target set by the Irish government, and others are expected to build after 2030. These projects have to secure planning permission, obtain a grid connection and also be successful in a competitive auction in the Renewable Electricity Support Scheme (RESS).

How do wind farms connect to the national grid?

The electricity generated by each turbine is collected by an offshore electricity substation located within the wind farm. Seabed cables connect the offshore substation to an onshore substation on the coast. These cables transport the electricity to land from where it will be used to power homes, farms and businesses around Ireland. The offshore developer works with EirGrid, which operates the national grid, to identify how best to do this and where exactly on the grid the project should connect.

What is the planning regime in Ireland for offshore wind?

The new Marine Planning and Development Management Bill will create a new streamlined system for planning permission for activity or infrastructure in Irish waters or on the seabed, including offshore wind farms. It is due to be published before the end of 2020 and enacted in 2021.

Who are the main investors in Irish offshore wind?

There are a number of companies aiming to develop offshore wind energy off the Irish coast and some of the larger ones would be ESB, SSE Renewables, Energia, Statkraft and RWE.

Is there scope for community involvement in offshore wind?

There are a number of companies aiming to develop offshore wind energy off the Irish coast and some of the larger ones would be ESB, SSE Renewables, Energia, Statkraft and RWE. Is there scope for community involvement in offshore wind? The IWEA says that from the early stages of a project, the wind farm developer "should be engaging with the local community to inform them about the project, answer their questions and listen to their concerns". It says this provides the community with "the opportunity to work with the developer to help shape the final layout and design of the project". Listening to fishing industry concerns, and how fishermen may be affected by survey works, construction and eventual operation of a project is "of particular concern to developers", the IWEA says. It says there will also be a community benefit fund put in place for each project. It says the final details of this will be addressed in the design of the RESS (see below) for offshore wind but it has the potential to be "tens of millions of euro over the 15 years of the RESS contract". The Government is also considering the possibility that communities will be enabled to invest in offshore wind farms though there is "no clarity yet on how this would work", the IWEA says.

What is the projected generating capacity from offshore wind in Irish waters?

Based on current plans, it would amount to around 12 GW of offshore wind energy. However, the IWEA points out that is unlikely that all of the projects planned will be completed. The industry says there is even more significant potential for floating offshore wind off Ireland's west coast and the Programme for Government contains a commitment to develop a long-term plan for at least 30 GW of floating offshore wind in our deeper waters.

How high are the wind turbines offshore?

There are many different models of turbines. The larger a turbine, the more efficient it is in producing electricity at a good price. In choosing a turbine model the developer will be conscious of this ,but also has to be aware the impact of the turbine on the environment, marine life, biodiversity and visual impact. As a broad rule an offshore wind turbine will have a tip-height of between 165m and 215m tall. However, turbine technology is evolving at a rapid rate with larger more efficient turbines anticipated on the market in the coming years.

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The Renewable Electricity Support Scheme is designed to support the development of renewable energy projects in Ireland. Under the scheme wind farms and solar farms compete against each other in an auction with the projects which offer power at the lowest price awarded contracts. These contracts provide them with a guaranteed price for their power for 15 years. If they obtain a better price for their electricity on the wholesale market they must return the difference to the consumer.

Does RESS apply to offshore wind farming?

Yes. The first auction for offshore renewable energy projects is expected to take place in late 2021.

What is the difference between fixed and floating offshore wind farms?

Cost is one difference, and technology is another. Floating wind farm technology is relatively new, but allows use of deeper water. Ireland's 50-metre contour line is the limit for traditional bottom-fixed wind farms, and it is also very close to population centres, which makes visibility of large turbines an issue - hence the attraction of floating structures Do offshore wind farms pose a navigational hazard to shipping? Inshore fishermen do have valid concerns. One of the first steps in identifying a site as a potential location for an offshore wind farm is to identify and assess the level of existing marine activity in the area and this particularly includes shipping. The National Marine Planning Framework aims to create, for the first time, a plan to balance the various kinds of offshore activity with the protection of the Irish marine environment. This is expected to be published before the end of 2020, and will set out clearly where is suitable for offshore renewable energy development and where it is not - due, for example, to shipping movements and safe navigation.

Do offshore wind farms pose a hazard to wildlife and what mitigation measures are in place?

YEnvironmental organisations are concerned about the impact of turbines on bird populations, particularly migrating birds. A Danish scientific study published in 2019 found evidence that larger birds were tending to avoid turbine blades, but said it didn't have sufficient evidence for smaller birds – and cautioned that the cumulative effect of farms could still have an impact on bird movements. A full environmental impact assessment has to be carried out before a developer can apply for planning permission to develop an offshore wind farm. This would include desk-based studies as well as extensive surveys of the population and movements of birds and marine mammals, as well as fish and seabed habitats. If a potential environmental impact is identified the developer must, as part of the planning application, show how the project will be designed in such a way as to avoid the impact or to mitigate against it.

How many people are typically employed on an offshore wind farm?

A typical 500 MW offshore wind farm would require an operations and maintenance base which would be on the nearby coast. Such a project would generally create between 80-100 fulltime jobs, according to the IWEA. There would also be a substantial increase to in-direct employment and associated socio-economic benefit to the surrounding area where the operation and maintenance hub is located.

What are the training routes to becoming involved in offshore wind?

The recent Carbon Trust report for the IWEA, entitled Harnessing our potential, identified significant skills shortages for offshore wind in Ireland across the areas of engineering financial services and logistics. The IWEA says that as Ireland is a relatively new entrant to the offshore wind market, there are "opportunities to develop and implement strategies to address the skills shortages for delivering offshore wind and for Ireland to be a net exporter of human capital and skills to the highly competitive global offshore wind supply chain". Offshore wind requires a diverse workforce with jobs in both transferable (for example from the oil and gas sector) and specialist disciplines across apprenticeships and higher education. IWEA have a training network called the Green Tech Skillnet that facilitates training and networking opportunities in the renewable energy sector.

What types of employment are available?

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How important could offshore wind energy be?

The IEA says that today's offshore wind market "doesn't even come close to tapping the full potential – with high-quality resources available in most major markets". It estimates that offshore wind has the potential to generate more than 420 000 Terawatt hours per year (TWh/yr) worldwide – as in more than 18 times the current global electricity demand. One Terawatt is 114 megawatts, and to put it in context, Scotland it has a population a little over 5 million and requires 25 TWh/yr of electrical energy.

How advanced is wave technology for renewable energy?

Not as advanced as wind, with anchoring a big challenge – given that the most effective wave energy has to be in the most energetic locations, such as the Irish west coast. Britain, Ireland and Portugal are regarded as most advanced in developing wave energy technology. The prize is significant, the industry says, as there are forecasts that varying between 4000TWh/yr to 29500TWh/yr. Europe consumes around 3000TWh/year.

How is the Irish industry represented?

The industry has two main umbrella organisations – the Irish Wind Energy Association, which represents both onshore and offshore wind, and the Marine Renewables Industry Association, which focuses on all types of renewable in the marine environment.