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Summary

OCID:: ocds-kuma6s-165557
Published by:: Seilwaith Amey Cymru / Amey Infrastructure Wales Limited
Authority ID:: AA77566
Publication date:: 26 May 2026
Deadline date:: 23 June 2026
Notice type:: Contract Notice
Has documents:: Yes
Has SPD:: No
Has Carbon Reduction Plan:: No

Abstract

AIW seeks to engage a Subcontractor to undertake the required works in South Wales, based on the NEC4 Engineering Construction Subcontract. AIW is responsible for the operation and maintenance of the Core Valley Lines (CVL) network on behalf of Transport for Wales (TfW) acting on behalf of the Welsh Government. As part of the AIW responsibility to maintain this network, there is a requirement as agreed by TfW to repair and renew elements of the network. The works at Caerphilly Tunnel Shaft 1 is a renewal item required.

Full notice text

CONTRACT NOTICE – NATIONAL

Notice Type: WORKS

1 Authority Details

1.1 Authority Name and Address

Official Name: Seilwaith Amey Cymru / Amey Infrastructure Wales Limited
Postal Address: Transport for Wales Infrastructure Hub / Ty Trafnidiaeth, Trefforest Industrial Estate,
Town: Pontypridd	Postal Code:	Country: UK
For the attention of: Matt Brown	Telephone: +44 800521660
E-Mail:	Fax:
Internet Address (URL): http://amey.co.uk Electronic access to information: https://www.sell2wales.gov.wales/ Electronic submission of tenders and requests to participate: https://www.sell2wales.gov.wales/

1.2 Address from which documentation may be obtained

Official Name: Seilwaith Amey Cymru / Amey Infrastructure Wales Limited
Postal Address: Transport for Wales Infrastructure Hub / Ty Trafnidiaeth, Trefforest Industrial Estate,
Town: Pontypridd	Postal Code:	Country: UK
For the attention of:	Telephone: +44 800521660
E-Mail:	Fax:
Internet Address (URL): http://amey.co.uk

1.3 Completed documents must be returned to:

Official Name: Seilwaith Amey Cymru / Amey Infrastructure Wales Limited
Postal Address: Transport for Wales Infrastructure Hub / Ty Trafnidiaeth, Trefforest Industrial Estate,
Town: Pontypridd	Postal Code:	Country: UK
For the attention of:	Telephone: +44 800521660
E-Mail:	Fax:
Internet Address (URL): http://amey.co.uk

2 Contract Details

2.1 Title

Core Valley Lines - Caerphilly Tunnel Shaft 1

2.2 Description of the goods or services required

AIW seeks to engage a Subcontractor to undertake the required works in South Wales, based on the NEC4 Engineering Construction Subcontract.

AIW is responsible for the operation and maintenance of the Core Valley Lines (CVL) network on behalf of Transport for Wales (TfW) acting on behalf of the Welsh Government.

As part of the AIW responsibility to maintain this network, there is a requirement as agreed by TfW to repair and renew elements of the network. The works at Caerphilly Tunnel Shaft 1 is a renewal item required.

NOTE: To register your interest in this notice and obtain any additional information please visit the Sell2Wales Web Site at https://www.sell2wales.gov.wales/Search/Search_Switch.aspx?ID=165557.

The buyer has indicated that it will accept electronic responses to this notice via the Postbox facility. A user guide is available at https://www.sell2wales.gov.wales/sitehelp/help_guides.aspx.

Suppliers are advised to allow adequate time for uploading documents and to dispatch the electronic response well in advance of the closing time to avoid any last minute problems.

2.3 Notice Coding and Classification

a) Commodity Codes

	Code		Description
	34951000		Access platforms
	44212310		Scaffolding
	45200000		Works for complete or part construction and civil engineering work
	45221242		Railway tunnel construction work
	45221248		Tunnel linings construction work
	45232450		Drainage construction works
	45232452		Drainage works
	45234000		Construction work for railways and cable transport systems
	45234100		Railway construction works
	45262100		Scaffolding work
	45262340		Grouting work
	71311100		Civil engineering support services

b) Delivery Location/Area

	Code		Location
	1016		Gwent Valleys (Torfaen, Blaenau Gwent, Caerphilly)

2.4 Total quantity or scope of tender

Caerphilly Tunnel was constructed between 1865 - 1870, is approximately 1780m long, and was bored through a heavily jointed geological sequence with joint orientation directing groundwater towards the tunnel. This has resulted in the degradation of the tunnel and shaft lining in particularly wet areas. Defects found to be present in the shaft include spalling, cracking and calcite deposits with some bulging.

Caerphilly Tunnel Shaft 1 is located at CAR 7m 04ch, OS Map Reference E 317290; N 185744, within NRW owned woodland.

AIW seek to procure a Design and Build Subcontractor through an NEC4 Option A Subcontract to complete the detailed design and carry out all works associated with addressing the current defects present within Caerphilly Tunnel Shaft 1.

3 Conditions for Participation

3.1 Minimum standards and qualification required

The successful subcontractor will require verified ConstructionLine Gold and RISQS memberships, with works-specific RISQS RICCL coding in place (see codes required in Part 1 Instructions for Tenderers).

4 Administrative Information

4.1 Type of Procedure

Single stage

4.2 Reference number attributed to the notice by the contracting authority

N/a

4.3 Time Limits

Time-limit for receipt of completed tenders
23-06-2026 Time 12:00

Estimated award date
28-07-2026

4.5 Language or languages in which tenders or requests to participate can be drawn up

4.6 Tender Submission Postbox

The buyer has indicated that it will accept electronic responses to this notice via the Postbox facility. A user guide is available at https://www.sell2wales.gov.wales/sitehelp/help_guides.aspx

5 Other Information

5.1 Additional Information

(WA Ref:165557)

The buyer considers that this contract is suitable for consortia bidding.

5.2 Additional Documentation

The following additional documents relating to this notice are available from the site:

Part 1 Instructions for Tenderers; Caerphilly Tunnel Shaft 1 R00 (26-05-26)

Part 2 NEC4 Contract Option A; Caerphilly Tunnel Shaft 1 R00 (15-05-26)

Part 3 Scope; Caerphilly Tunnel Shaft 1 R00 (26-05-26)

Part 4 Site Information; Caerphilly Tunnel Shaft 1 R00 (20-05-26)

Part 5 Activity Schedule Template; Caerphilly Tunnel Shaft 1 R00 (15-05-26)

Part 6 Selection Questionnaire; Caerphilly Tunnel Shaft 1 R00 (19-05-26)

Appendix 1

Appendix 2

Appendix 3

Appendix 4

Appendix 5

Appendix 6

5.3 Publication date of this notice

26-05-2026

SF 51a

Coding

Commodity categories

ID	Title	Parent category
34951000	Access platforms	Loadbearing equipment
71311100	Civil engineering support services	Civil engineering consultancy services
45234000	Construction work for railways and cable transport systems	Construction work for pipelines, communication and power lines, for highways, roads, airfields and railways; flatwork
45232450	Drainage construction works	Ancillary works for pipelines and cables
45232452	Drainage works	Ancillary works for pipelines and cables
45262340	Grouting work	Special trade construction works other than roof works
45234100	Railway construction works	Construction work for railways and cable transport systems
45221242	Railway tunnel construction work	Construction work for bridges and tunnels, shafts and subways
44212310	Scaffolding	Structural products and parts except prefabricated buildings
45262100	Scaffolding work	Special trade construction works other than roof works
45221248	Tunnel linings construction work	Construction work for bridges and tunnels, shafts and subways
45200000	Works for complete or part construction and civil engineering work	Construction work

Delivery locations

ID	Description
1016	Gwent Valleys (Torfaen, Blaenau Gwent, Caerphilly)

Alert region restrictions

The buyer has restricted the alert for this notice to suppliers based in the following regions.

ID	Description
There are no alert restrictions for this notice.

About the buyer

Main contact:: N/a
Admin contact:: N/a
Technical contact:: N/a
Other contact:: N/a

Further information

Date	Details
No further information has been uploaded.

Postbox

The awarding buyer has indicated that it will accept electronic responses to this notice via the Tender Submission Postbox facility.

Submit your tender response electronically in a secure environment.

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Postbox – for Buyers and Suppliers

Q&A

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Additional documents

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Current documents

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Core Valley Lines - Caerphilly Tunnel Shaft 1

Contents

Summary

Abstract

Full notice text

CONTRACT NOTICE – NATIONAL

1 Authority Details

1.1

Authority Name and Address

1.2

Address from which documentation may be obtained

1.3

Completed documents must be returned to:

2 Contract Details

2.1

Title

2.2

Description of the goods or services required

2.3

Notice Coding and Classification

2.4

Total quantity or scope of tender

3 Conditions for Participation

3.1

Minimum standards and qualification required

4 Administrative Information

4.1

Type of Procedure

4.2

Reference number attributed to the notice by the contracting authority

4.3

Time Limits

4.5

Language or languages in which tenders or requests to participate can be drawn up

4.6

Tender Submission Postbox