--- title: "Core Valley Lines - IM Renewals; Caerphilly Tunnel Bore" ocid: "ocds-kuma6s-157346" canonical_url: "https://d3tenders.com/contract/?ocid=ocds-kuma6s-157346" markdown_url: "https://d3tenders.com/contract/ocds-kuma6s-157346.md" json_url: "https://d3tenders.com/contract/ocds-kuma6s-157346.json" source: "Sell2Wales" current_stage: "Tender" buyer: "SEILWAITH AMEY CYMRU / AMEY INFRASTRUCTURE WALES LIMITED" published: "2025-10-24" --- # Core Valley Lines - IM Renewals; Caerphilly Tunnel Bore Buyer: SEILWAITH AMEY CYMRU / AMEY INFRASTRUCTURE WALES LIMITED Current stage: Tender OCID: ocds-kuma6s-157346 [View canonical contract page](https://d3tenders.com/contract/?ocid=ocds-kuma6s-157346) [Download OCDS JSON](https://d3tenders.com/contract/ocds-kuma6s-157346.json) ## Summary Seilwaith Amey Cymru / Amey Infrastructure Wales Limited is overseeing a public procurement process for the renewal of the Core Valley Lines, specifically focusing on the Caerphilly Tunnel Bore. This project falls under the 'works' category, primarily involving construction work for tunnels, and is located between Caerphilly and Lisvane near Cardiff, South Wales. The tender is in the 'tender' stage as of 24th October 2025, with electronic responses being accepted until 21st November 2025, 17:00 GMT. The procurement method is open, allowing all qualified vendors to submit proposals. Successful bidders will be notified by 30th January 2026, following the award period. This tender offers substantial opportunities for growth for businesses specialising in construction, particularly those with expertise in masonry, tunnel works, and water management solutions. The contract is suitable for consortia, making it an attractive proposition for joint ventures aiming to meet the project's requirements. Companies with ConstructionLine Gold and RISQS certifications are particularly well-suited for this opportunity. The project's historical significance and complex nature make it an ideal fit for businesses looking to enhance their portfolio with high-priority infrastructure projects. ## Notice The Caerphilly Tunnel Bore is located at CAR 6m 6ch to 7m 14ch, OS Map Reference ST 17912 84295 (low mileage), ST 17208 85922 (high mileage).Caerphilly Tunnel is running through the Caerphilly Mountain between Caerphilly and Lisvane near Cardiff in South Wales. It is a single bore tunnel located on the CAR (Cardiff - Rhymney) Line, spanning from 6m 6ch to 7m 14ch, with a length of 1784m and a twin track line passing through.Caerphilly tunnel was constructed between the years 1866-71, with 2 tunnel portals and 5 tunnel shafts. Historical records indicate there is a hidden shaft 'Shaft No.6' whose existence was confirmed by an investigation.AIW seek to procure a Subcontractor under and NEC4 Option A Subcontract to undertake the brickwork/masonry repair works throughout the extent of the tunnel, and design of water management solutions. The scope for this tender is for the highest priority defects.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=157346.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. Successful subcontractor will require verified ConstructionLine Gold and RISQS memberships, with associated RISQS RICCL codes in place (see listed in Part 1 document under '3. The Procurement Process').(WA Ref:157346)The buyer considers that this contract is suitable for consortia bidding. ## Key Details | Field | Value | | --- | --- | | Publication source | Sell2Wales | | Latest notice | https://www.sell2wales.gov.wales/search/search_switch.aspx?ID=157346 | | Notice type | S2W Notice - Website Invitation to Tender Notice | | Procurement type | Standard | | Procurement category | Works | | Procurement method | Open | | Procurement method details | Not specified | | Tender suitability | Not specified | | Awardee scale | Not specified | | All stages | Tender | ## Dates | Field | Value | | --- | --- | | Publication date | 24 Oct 2025 | | Submission deadline | 21 Nov 2025 | | Future notice date | Not specified | | Award date | Not specified | | Contract period | Not specified | | Recurrence | Not specified | ## Values | Field | Value | | --- | --- | | Tender value | Not specified | | Lots value | Not specified | | Awards value | Not specified | | Contracts value | Not specified | ## Status | Field | Value | | --- | --- | | Tender status | Not specified | | Lots status | Not specified | | Awards status | Not specified | | Contracts status | Not specified | ## Buyer | Field | Value | | --- | --- | | Main buyer | SEILWAITH AMEY CYMRU / AMEY INFRASTRUCTURE WALES LIMITED | | Locality | PONTYPRIDD | | Post town | Not specified | | Postcode | N/A | | Country | Not specified | | ITL 1 | Not specified | | ITL 2 | Not specified | | ITL 3 | Not specified | | Local authority | Not specified | | Electoral ward | Not specified | | Westminster constituency | Not specified | | Delivery location | Not specified | ## CPV Codes ### Divisions - 45 - Construction work ### Codes - 45221000 - Construction work for bridges and tunnels, shafts and subways - 45221200 - Construction work for tunnels, shafts and subways - 45221240 - Construction work for tunnels - 45221242 - Railway tunnel construction work - 45221248 - Tunnel linings construction work - 45234100 - Railway construction works - 45261420 - Waterproofing work - 45262500 - Masonry and bricklaying work - 45262522 - Masonry work ## Release History - 24 Oct 2025 at 16:46 - Tender - S2W Notice - Website Invitation to Tender Notice - https://www.sell2wales.gov.wales/search/search_switch.aspx?ID=157346 ## Notice URLs - http://amey.co.uk - https://www.sell2wales.gov.wales/Search/Search_Switch.aspx?ID=157346.The - https://www.sell2wales.gov.wales/sitehelp/help_guides.aspx - https://www.sell2wales.gov.wales/sitehelp/help_guides.aspx.Suppliers ## Provenance This Markdown file is an alternate public rendering of the D3 Tenders contract record. The canonical page is https://d3tenders.com/contract/?ocid=ocds-kuma6s-157346. The underlying structured data is available as OCDS JSON at https://d3tenders.com/contract/ocds-kuma6s-157346.json.