The Coal Authority has gone out to tender with a contract for ground stabilisation by drilling and grouting worth an estimated £9.75 million.
The Coal Authority has a legal duty under the Coal Mining Subsidence Act 1991 to repair properties damaged by coal mining subsidence in the five coalfield regions. The works are funded by grant in aid from central government in order that the Coal Authority can discharge its statutory duty.
The Coal Authority has a requirement to retender the current Drilling and Grouting Framework which will expire on 1st of March 2024.
The new Framework is being tendered in the following three Lots:
- Lot One: Drilling and Grouting with unobstructed open access equipment
- Lot Two: Drilling with restricted height / restricted access equipment
- Lot Three: Drilling and Solution Grouting with restricted height / restricted access equipment
Suppliers can tender either for all Lots or the Lots of their choice.
The works for the Framework will mostly be based over the UK Coalfields - the three Lots are further broken down into the following five regions.
- Region 1 - Scotland East and West
- Region 2 - Cumbria / Northumberland / Co.Durham / Durham / Sunderland / Newcastle
- Region 3 - North Wales / Cheshire / Lancashire / Merseyside / North Yorkshire / West Yorkshire
- Region 4 - South Yorkshire / Nottinghamshire / Derbyshire / Leicestershire / Staffordshire / Shropshire / West Midlands / Warwickshire / Herefordshire / Worcestershire
- Region 5 - Somerset / South Gloucestershire / Bristol / South Wales / Pembrokeshire / North Gloucestershire (Forest of Dean)
The regions correspond with the UK coal fields. There may also be a requirement for ground investigation within Mid Wales for examination of metal mining fields.
The framework scope covers the provision of drilling and grouting works, including drilling into ground which has been impacted by mining related subsidence of instabilities. The work will be in both open space such as fields or roads as well as in more restricted areas such as within the boundaries of properties.
The work will involve the stabilisation of the impacted ground via Cementitious based Suspension Grouts or Resin based Solution Grouts.
A typical call off work order under the framework, which will run for 4 years, will involve the establishment of a secure construction site and setting up a drilling rig. This will be followed by a programme of works to provide an engineered solution which restores the impacted area to use and resolves the public safety hazard which mining related subsidence poses.
Time limit for receipt of tenders or requests to participate is 4 December 2023 – click here to access the tender documentation
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