Scope
Reference
CA18/2/1/127
Description
The purpose of these works is to prevent the Nant y Bai watercourse from continuing to scour (causing active erosion of) spoil heaps that make up its banks and causing mobilisation of metal-rich spoil into the watercourse. It is proposed to install a mixture of scour protection interventions including rock filled rolls and bags, geotextile matting and wooden stakes at a number of discrete areas along the bank to stabilise the spoil and prevent ongoing erosion by the Nant y Bai. We would welcome input from the Contractor regarding current design methodology based on previous experiences.
The Works comprise the following:
• Install scour protection measures in accordance with the drawings;
• Install slope stabilisation measures in accordance with the drawings;
• Supply and install 150No. rock filled bags as specified on the drawings and as directed on site to provide scour protection in Areas 3, 5 and 6;
• Translocate Purple Moor grass into the working area in accordance with the drawings. The source of Purple Moor grass to be agreed with the ecological supervisor but shall be within the Site;
• Install silt traps in accordance with the drawings;
• Install an overland pipe with associated capture structure and outfall structure in accordance with the drawings;
• Deliver plant and materials along designated routes to limit impact on the protected ecology and provide any equipment necessary to minimize the impact on the designated routes. This may include helicopters to aid in load lifting and placement of rock roll bags; and
• Plan and execute temporary flow diversion measures to enable the Works in the river bed to be completed.
The Works must be carried out, including transportation of plant and materials, in a way that:
• Does not cause undue harm to the local ecology, including plants, trees and particularly the protected Calaminarian habitats (comprising metallophyte flowering and non-flowering plant species);
• Does not damage local heritage features, including historic mining structures and artefacts;
• Does not cause undue disruption to the local community;
• Does not cause damage to existing services;
• Does not cause damage to the forest track road,
• Is in accordance with the relevant Environmental Action Plan (EAP) as prepared by the Mining Remediation Authority and agreed with NRW.
Total value (estimated)
- £100,000 excluding VAT
- £120,000 including VAT
Below the relevant threshold
Contract dates (estimated)
- 19 January 2026 to 2 March 2026
- 1 month, 15 days
Main procurement category
Works
CPV classifications
- 45112450 - Excavation work at archaeological sites
Contract locations
- UKL - Wales
Participation
Particular suitability
Small and medium-sized enterprises (SME)
Submission
Enquiry deadline
24 November 2025, 5:00pm
Tender submission deadline
5 December 2025, 5:00pm
Submission address and any special instructions
All relevant information with regard to this opportunity is freely available on the Mining Remediation Authority procurement portal and can be accessed under the Open Opportunities section by following this link.
- http://Inbye.coal.gov.uk/s2c/
Tender submissions must be made through this procurement portal.
Tenders may be submitted electronically
Yes
Award criteria
Technical and Cost criteria
Technical Criteria - 70% of available marks
Cost criteria - 30% of available marks
Procedure
Procedure type
Below threshold - open competition
Documents
Associated tender documents
Nant y Mwyn Invitation to Tender.pdf
Invitation to Tender document providing all information for parties considering whether to participate in this opportunity
Contracting authority
Mining Remediation Authority
- Public Procurement Organisation Number: PRPD-5825-QDVY
200 Lichfield Lane
Nottinghamshire
NG18 4RG
United Kingdom
Contact name: Natalie Earnshaw
Region: UKF15 - North Nottinghamshire
Organisation type: Public authority - central government