Telephone: 0151 448 7345


Fully Consented Underground Salt Cavern Gas Storage

A King Street Energy Development

Learn more about the project

King Street is a salt cavern underground gas storage (UGS) business which is being developed by King Street Energy (KSE), near Northwich, Cheshire.

The location benefits from excellent geological characteristics, construction and commercial flexibility.

The business has received all of the key planning permission consents required to enable the development to proceed. The KSE UGS business consists of 10 underground gas storage caverns with a trading gas capacity of 545 million cubic metres (mcm).

The King Street Energy site is around 245 acres. It will be constructed to store gas in underground cavities leached in the salt layer some 330m below the surface, each cavern will be 100m in diameter, 60meters high and will be 200m apart. The thick salt layer coupled with the overlying marl makes the conditions ideal for gas storage.

Gas storage construction, due to its nature, takes approximately 5 years from starting design to initial operations and approximately 8 years to complete to full storage size.

A 58km dedicated twin pipeline system will be constructed to facilitate the transportation of leaching water from the Mersey Estuary to the King Street site in Cheshire. The ability to obtain sufficient water and subsequently discharge the resultant brine is crucial to the successful and timely development of onshore gas storage caverns of the type being considered at the King Street site.

The use of a pipeline system ensures that the leaching programme can proceed without being constrained by the off take and demand of local brine users.

  • Solution Mining

    Prior to commencement of solution mining, two concentric tubes are inserted into the boreholes to the salt layer. A mining wellhead is then installed and connected to the twin pipelines.

    The caverns are created using solution mining which involves the pumping of water through one of the concentric tubes in the borehole to dissolve the underground salt.

    The brine created by the dissolution of salt in water is extracted via the borehole before being transported through the pipeline to be discharged into the Mersey Estuary.

  • Pipeline

    King Street Energy will use a dedicated 58km twin pipeline system where leaching water will be abstracted from the Mersey Estuary.

    The brine arising from the solution mining process will be returned to the Mersey Estuary and discharged via an outfall into a deep water area of the estuary.

    The pipeline route has been carefully selected to minimise environmental and land disturbance. The Pipeline requires pumping stations at King Street, Frodsham and Bromborough.

    Map of King Street Energy plan
  • The King Street Energy Business

    The business has been developed to utilise proven and reliable technologies, using expert staff, in an area of Cheshire with well-known geology which has been investigated thoroughly.

    Our site is the only remaining viable location for salt cavern gas storage in the UK.

    The business consists of the following elements:

    • 10 underground gas storage caverns to be created using solution mining and a gas processing facility located on the 245 acre King Street site;
    • Ancillary infrastructure located on the King Street site primarily required to undertake solution mining;
    • A 58km dedicated twin pipeline system to facilitate the transportation of leaching water from the Mersey Estuary to the King Street site in Cheshire and the subsequent discharge of brine created by the solution mining process back into the Mersey Estuary;
    • Intermediate pumping stations at Frodsham;
    • A pumping station at Bromborough;
    • Marine works at Bromborough comprising an estuary water intake structure and intake pipeline and an outfall pipeline including a diffuser section
    • Plant Operation and maintenance
    • Gas Trading
  • The KSE UGS Business

    • Low risk
    • All land agreements in place
    • Market leading business
    • Low cost per storage unit
    • Low capital cost
    • Low complexity
    • Proven, known salt bed and gas storage integrity
      • Area synonymous with gas storage, 4 others in the area
      • Low risk on-shore
    • Proven location fcor delivery, operation and maintenance
      • Skills available in the local area
      • Standard NEC3 smart contracts and partnerships for supply chain
    • Use of proven technology
      • Low risk off the shelf equipment
      • Used in several projects in the area
      • Approved by Health and Safety Executive and regulatory authorities
    • Available team and contractors with proven experience
    • Fully consented
    • Funding obtained

Planning for the King Street Energy UGS Business is now fully implemented


The shareholders of KSE have a proven track record of successfully planning, developing and operating businesses ranging from waste disposal, land remediation, housing, community care, commercial premises, FM, Energy and many other diverse businesses.

Companies involved in turning the KSE shareholders vision of a successful UGS Business into a reality include major international businesses.


  • AMEC
  • AXIS PLD Planning
  • How Planning
  • MWH
  • Squire Sanders (UK) LLP


  • The King Street business will offer new employment opportunities
  • All landscape will be restored to its original condition or enhanced
  • The local community will receive a 'community benefit fund' to provide funding to support effective community projects in Cheshire


  • KSE will co-operate with the Mineral Planning Authority and will deliver a Wildlife Protection Plan
  • All hedgerows and trees will be replaced
  • Full compliance with legal and planning conditions relating to nature conservations
  • Appropriate noise mitigation measures will be employed;
  • KSE will employ an aftercare scheme which will include a plan for the long term aftercare and management of the habitat and ecology
  • A mitigation strategy will be approved and adopted to avoid disruption to local indigenous wildlife species
  • KSE have agreed to a Mersey Forest contribution of two new trees to replace each lost tree
  • A public access area will be implemented and be used by the public on foot for recreation and enjoyment purposes

Correspondence Address:

King Street Energy
Liverpool Business Centre
23-25 Goodlass Road

L24 9HJ

Mark O'Brien

Managing Director

Telephone:+44 (0)151 448 7345

Staff Profile

Mark O'Brien

Started his career with Lockheeds as a mechanical engineer working on aircraft landing gear and control systems. He moved into the field of system safety where he was responsible for aircraft reliability and safety certification. He then joined Metro-Cammell (MCL) and delivered the first safety cases for UK rolling stock. After leaving MCL he joined Westinghouse and became Board Director for projects, quality and safety. Major projects included Jubilee line extension in the UK and others in Hong Kong, Singapore, Kuala Lumpur and Sri Lanka.

Mark also established a manufacturing facility in China to support Far East expansion. After Westinghouse he joined EDF Energy as Director of their major transport infrastructure projects including Channel Tunnel Rail Link and Terminal 5. When EDF’s networks business was sold to UK Power Networks Mark was asked to transfer to EDF Energy to become Director of their UK gas division.

After successfully delivering EDF’s gas storage project in the north west of England, he was then approached by the board of King Street Energy where he is now Managing Director.

Chantal Quarless

Planning Manager

Telephone:+44 (0)151 448 7347

Staff Profile

Chantal Quarless

Graduated from Liverpool University and moved into sales and marketing in the sporting sector. She joined King Street Energy in 2011 as a Project-Coordinator responsible for communication between the Project Stakeholders, shareholders, local communities and regulatory authorities.

Chantal also managers the Planning Application, Implementation and associated consents.

Alex Dornan

Project Director

Telephone:+44 (0)141 242 7900

Staff Profile

Alex Dornan

Alex was previously employed with Fairclough/Amec for over 25 years managing the delivery of significant civil engineering tenders. Successful tender values varied from £5.0m to £150.0m.

Alex joined NPL in 2006 and as Group Projects Director is responsible for the management and coordination of the diverse range of projects within the Group. This includes large scale residential schemes, leisure projects, waste management facilities commercial developments and energy projects

Peter Dukes

Engineering Manager

Telephone:+44 (0)141 242 7900

Staff Profile

Peter Dukes, BSc(Eng), MSc, CEng, FIMechE, FIET, FIES

Peter Dukes spent more than 30 years in senior positions with several leading firms of consulting engineers before setting up his own practice in 1996. He has been involved in a wide range of energy projects including Theddlethorpe Gas Terminal, St Fergus Gas Terminal, Morecambe Bay Gas Field (as project director for the controls and communication system), Forties Field, plus project director for the Nuclear and M&E elements of the PSA Faslane, Coulport EHJ and Rosyth RD57 projects.

Over the past 18 years, he has been involved in a number of CCGT/CHP power station, underground gas storage and water supply projects for several developers, including NPL. Peter has been involved in the development of the King Street underground gas storage project for NPL.

Graham Fazakerley

Industrial Product Designer

Telephone:+44 (0)151 448 7344

Staff Profile

Graham Fazakerley

Graham started his career as a mechanical production engineer; he then became an Industrial Product designer within the Design offices of Havelock Europa responsible for Research, Development and design. Graham was responsible for managing projects, from conceptual design through to site completion. This includes a wide range of projects from individual specialist products to full turn-key projects.

Other major projects, Graham has been involved with include; the Channel Tunnel and EDF’s gas storage project in the north west of England.

Graham joined the King Street Energy team in 2011, as an Industrial Product Designer, responsible for technical data/CAD, liaison between the appointed consultants, early procurement, appointment of contractors and management of the regulatory authorities. In addition Graham is responsible for undertaking the site management duties associated with implementing the project planning permissions, ensuring the works are delivered safety, timely on budget and to the specified quality.