Planning

Cwm Rheidol Phase 2 Works

THE COAL AUTHORITY

This public procurement record has 1 release in its history.

Planning

29 Jul 2021 at 12:13

Summary of the contracting process

The Coal Authority is planning the Cwm Rheidol Phase 2 Works, which involve crucial construction projects aimed at mitigating environmental risks associated with abandoned metal mines in the UK. This project is classified under construction work for mining and seeks to address serious pollution issues stemming from Adit 9 at Cwm Rheidol. The supplier engagement event for this tender is scheduled for 10:00 on Wednesday, 18th August 2021. Interested parties are encouraged to reach out to Jacob Collishaw (jacobcollishaw@coal.gov.uk) to secure a place at this event or for any inquiries regarding the procurement process.

This tender presents significant business opportunities, particularly for firms specialising in environmental remediation, civil engineering, and construction works tailored to mining operations. Companies equipped with expertise in drainage solutions, structural rehabilitation, and compliance with mining regulations will find themselves well-positioned to compete for this contract. Given the scope of the project, businesses engaged in sustainable practices and possessing experience in long-term infrastructure design will be essential to addressing the requirements outlined for Phase 2 of the Cwm Rheidol project.

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Notice Title

Cwm Rheidol Phase 2 Works

Notice Description

Abandoned metal mines are significant sources of metals pollution to surface waters, particularly as a result of polluted mine water discharges. Elevated levels of metals from these discharges, primarily zinc, lead and cadmium, can have a detrimental impact on the ecology of river systems, reducing fish populations and the diversity of invertebrate fauna. There are more than 1,300 abandoned metal mines in Wales polluting more than 600km of river reaches, making them the single biggest cause of water quality objective failures. The Cwm Rheidol project forms part of a wider programme of works, which are intended to reduce river pollution and help restore river health downstream, directly contributing to the sustainable management of natural resources in Wales as detailed in the Environment (Wales) Act 2015 and the Well-being of Future Generations (Wales) Act 2015. As a result of the above, National Resources Wales (NRW) commissioned The Coal Authority (CA) to assess the risks at a number of abandoned mine sites, with Adit 9 at Cwm Rheidol being the most significant and critical risk identified to date. Blow-out risk assessment reports have concluded that there is a potentially high risk of blow-out at Adit No.9 due to an existing blockage in, and progressive collapse of, the existing adit between the adit portal and rockhead. The principle objective of the Cwm Rheidol blow-out mitigation works is to reduce or permanently remove the risk of a minewater blow-out at Adit No.9. The Coal Authority on behalf of Natural Resources Wales (NRW) have undertaken a study to assess the risk and magnitude of a potential blow-out and concluded that there is a risk that up to 2,112m3 of water could blow-out of the adit portal at any time. A two phased approach is proposed to mitigate this risk; Phase 1 - The construction of a 2,112m3 capacity dry lagoon and engineered channel to convey any blow-out water from Adit No. 9 to the lagoon. Phase 1 is being carried out under the NRW framework Phase 2 - Draining down the adit and preventing future blow-out risk by introducing a permanent drain through the blockage in the adit and stabilising the roof. Phase 2 will be tendered under NEC4 contract conditions. Please note that this Prior Information Notice is for works to be undertaken as part of Phase 2 only.

Lot Information

Lot 1

Requirements of Phase 2 works: * To design and install a clear drainage path of minimum 300mm clear diameter into the adit as far as rockhead * Include some form of redundancy (backup) such as twin pipes or equivalent * Design life 50 years * Infrastructure to be protected from further roof collapse * Infrastructure resistant to the chemical and pH characteristics of the mine water * Stabilisation of the adit roof structure such that further collapses are prevented * Reconstruction of any adit infrastructure at at the portal to replicate the historical mine portal * The works at adit 9 will include entry of persons into the adit and /or removal or alteration of mine infrastructure, therefore the works will fall under the Mines Regulations 2014 rather than the Construction Design and Management Regulations 2015

Publication & Lifecycle

Open Contracting ID
ocds-h6vhtk-02ce0e
Publication Source
Find A Tender Service
Latest Notice
https://www.find-tender.service.gov.uk/Notice/018080-2021
Current Stage
Planning
All Stages
Planning

Procurement Classification

Notice Type
Planning Notice
Procurement Type
Standard
Procurement Category
Works
Procurement Method
Not Specified
Procurement Method Details
Not specified
Tender Suitability
Not specified
Awardee Scale
Not specified

Common Procurement Vocabulary (CPV)

CPV Divisions

45 - Construction work


CPV Codes

45254100 - Construction work for mining

Notice Value(s)

Tender Value
Not specified
Lots Value
Not specified
Awards Value
Not specified
Contracts Value
Not specified

Notice Dates

Publication Date
29 Jul 20214 years ago
Submission Deadline
Not specified
Future Notice Date
5 Sep 2021Expired
Award Date
Not specified
Contract Period
Not specified - Not specified
Recurrence
Not specified

Notice Status

Tender Status
Planned
Lots Status
Planned
Awards Status
Not Specified
Contracts Status
Not Specified

Contracting Authority (Buyer)

Main Buyer
THE COAL AUTHORITY
Contact Name
Jacob Collishaw
Contact Email
jacobcollishaw@coal.gov.uk
Contact Phone
Not specified

Buyer Location

Locality
MANSFIELD
Postcode
NG18 4RG
Post Town
Nottingham
Country
England

Major Region (ITL 1)
TLF East Midlands (England)
Basic Region (ITL 2)
TLF1 Derbyshire and Nottinghamshire
Small Region (ITL 3)
TLF15 North Nottinghamshire
Delivery Location
TLL Wales

Local Authority
Mansfield
Electoral Ward
Berry Hill
Westminster Constituency
Mansfield

Open Contracting Data Standard (OCDS)

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