Islandmagee Gas Storage Project December 2019 Consultation ML 28_12, Consultation Now Closed

Consultation opened on 20 December 2019. Closing date 27 March 2020.


***************THIS CONSULTATION IS NOW CLOSED*******************
The Department of Agriculture, Environment and Rural Affairs (DAERA), Marine and Fisheries Division, is the marine licensing authority for the Northern Ireland inshore region under the Marine and Coastal Access Act 2009 and the appropriate authority for Northern Ireland as set out in the Marine Works (Environmental Impact Assessment) Regulations 2007 (as amended in 2011).


Consultation description

This web page publishes all relevant documentation to assist the public in formulating a view on an updated application for a Marine Licence for Islandmagee Gas Storage Project.  Due to the nature of the project it is subject to the Marine Works (Environmental Impact Assessment) Regulations 2007 (as amended 2011).  The original application was consulted on in 2012 and for the purpose of clarity documents 1-4 below were initially consulted on during that 2012 process.  A final licence was not awarded at that stage and no contractor was appointed for the construction (which is usually required for a final licence to be issued). The company indicated in late 2018 that they wished to proceed with the project.  Due to subsequent European designations in the area and requirements to assess up to date information, the company were asked to conduct additional survey work to update the original Environmental Impact Statement (EIS) and provide an update on the brine dispersion modelling.  Documents 5-15 have been produced in 2019 to support this re-application.

Licences for both the abstraction of seawater and discharge of solution mining brine were issued by Northern Ireland Environment Agency (NIEA) on 14th November 2014. Both of these consents will be reviewed in 2020.

Planning permission for terrestrial works was granted on 18 October 2012 (F/2010/0092/F).

A previous consultation opened on 20 December 2019 and closed on 7 February 2020.  As a result of an administrative oversight in the original newspaper advertisement, the Department with the support of the applicant has decided to run another consultation for a further 42 days.

You do not need to make a further response if you have already made a response during the 20 December2019-7 February 2020 consultation period.  Your responses have been logged and will be included consultation process.

Project description

The application proposes the creation of 7 underground caverns by solution mining below Larne Lough, which would be used for the storage of natural gas. The application includes the associated marine infrastructure to enable seawater abstraction and the subsequent discharge of brine from the creation of the caverns by solution mining.

The Islandmagee Gas Storage Project; comprises the construction by solution mining of seven underground caverns in the Permian salt strata approximately 1,700m below Larne Lough, off Islandmagee, County Antrim.

The project includes the design and construction of a surface brine pumping facility, a gas compression facility, associated gas pipelines, a brine and seawater pipeline and associated infrastructure.

The components of the Project which are subject to a Marine Licence application are limited to:

  1. the boreholes and subsurface caverns to be leached
  2. the seawater intake structure and
  3. the brine discharge pipeline.

The solution mining will start with the drilling of the first of seven boreholes to a depth of approx. 1,700 metres. These will each take approximately one month to drill. A single drilling rig will be used on a 24/7 basis, with the rig moved from one completed well to the next. Each completed well will be capped with a well-head and will have concentric leaching strings inserted ready for the introduction of the seawater. The well-heads and well pad will be located onshore although the boreholes will be directionally drilled out under Larne Lough to the positions where the caverns will be constructed.

The solution mining will involve the pumping of sea water into each borehole as it is completed to leach (dissolve) the salt to form the void of each cavern. The returning concentrated brine solution is withdrawn and is pumped along the brine discharge pipeline to an outfall discharge point in the North Channel.

The abstraction of seawater and discharge of material from the cavern construction (brine) is regulated by NIEA’s Resource Efficiency Division.

How to respond

Copies of the application, environmental statement and Marine Environmental Conditions Update may be viewed free of charge during office hours at our premises on the First Floor, Klondyke Building, Gasworks Business Park, Belfast, BT7 2JA. Please contact DAERA on 028 90 569247 to arrange a viewing.

Please send your written responses to the consultation to either the address above or to Please note the closing date for responses is 26th March 2020.

You do not need to make a further response if you have already made a response during the 20 December2019-7 February 2020 consultation period.  Your responses have been logged and will be included consultation process. However, this further period may be used to add any further comments in support of your views.

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