Project Description

Client: National Grid

Stakeholders: Cadent

Project Duration: 21 weeks

Project Scope:

The works comprised of the demolition of 2nr. Below ground gas holders (55 metres in diameter and 12 metres deep), removal of filming oil, dewatering and removal of residual sludge; together with decommissioning and removal of telecoms switch gear room, electrical substation, gas booster housing and associated overhead pipework.

Project Constraints & Challenges:

  • Works immediately adjacent to the river Goyt
  • Working around and protection of live low-pressure gas mains
  • Coordination and liaison with main contractor Balfour Beatty working within the site boundaries
  • Working collaboratively with eth Environment Agency to agree to monitor dewatering flow rates


  • Fully compliant with National Grids Risk Management and Health & Safety protocols
  • Maintaining the integrity and stability of the dumplings during demolition operations
  • Zero hot woks, all holders were removed using mechanical deconstruction methods only
  • Successful logistics and programme coordination with numerous third parties including the Environment Agency, Canal River Trust, Balfour Beatty, Cadent and other utility providers.