--- title: "Attenuation Precast Tanks" ocid: "ocds-b5fd17-8a01bc23-ff2c-4fa2-9ab8-3e551d2028bc" canonical_url: "https://d3tenders.com/contract/?ocid=ocds-b5fd17-8a01bc23-ff2c-4fa2-9ab8-3e551d2028bc" markdown_url: "https://d3tenders.com/contract/ocds-b5fd17-8a01bc23-ff2c-4fa2-9ab8-3e551d2028bc.md" json_url: "https://d3tenders.com/contract/ocds-b5fd17-8a01bc23-ff2c-4fa2-9ab8-3e551d2028bc.json" source: "Contracts Finder" current_stage: "Tender" buyer: "KILNBRIDGE CONSTRUCTION SERVICES LTD" published: "2025-09-04" --- # Attenuation Precast Tanks Buyer: KILNBRIDGE CONSTRUCTION SERVICES LTD Current stage: Tender OCID: ocds-b5fd17-8a01bc23-ff2c-4fa2-9ab8-3e551d2028bc [View canonical contract page](https://d3tenders.com/contract/?ocid=ocds-b5fd17-8a01bc23-ff2c-4fa2-9ab8-3e551d2028bc) [Download OCDS JSON](https://d3tenders.com/contract/ocds-b5fd17-8a01bc23-ff2c-4fa2-9ab8-3e551d2028bc.json) ## Summary Kilnbridge Construction Services Ltd is inviting bids for a tender entitled "Attenuation Precast Tanks" as part of the HS2 Old Oak Common Station Works Package. The procurement process is currently at the tender stage, with an end date for submissions set for 11 September 2025. The successful subcontractor will undertake the design, manufacture, and supply of precast concrete tanks for the site in London. This contract, valued between £500,000 and £1,000,000, is categorised under installation services of tanks (CPV code: 51810000) and will progress from RIBA stage 4 to RIBA stage 5. Construction is anticipated to start on 27 March 2026, concluding by 26 March 2027. This tender offers substantial opportunities for businesses specialising in civil engineering and construction-related services, particularly those with expertise in designing and manufacturing precast concrete structures. Companies with capabilities in technical assurance, BIM modelling, and sustainable construction practices are well-suited to participate. Given the prominent nature of the HS2 infrastructure project and its impact on urban development in London, successful involvement in this contract can significantly enhance the portfolio and market presence of participating businesses. ## Notice Kilnbridge have secured the HS2 Old Oak Common Station Works Package for the construction of Urban Realm elements and the Head Houses and Ancillary Buildings. Part of these works require the installation of two, precast concrete attenuation tanks to the eastern part of the site. These tanks are a Subcontractor's design portion. Eastern HS2 Attenuation Tank * Area 1115m2 * Volume 1165m3 * Tank Depth 1.1m * Void Ratio 0.95 Eastern HS2 Dirty Water Tank * Area 1115m2 * Volume 350m3 * Tank Depth 1.6m * Void Ratio 0.95 Kilnbridge are seeking the services of suitably qualified and experienced Sub-subcontractor who shall be responsible for developing the Contractors Detailed Design to Design for Construction & Manufacturing. Taking from RIBA 4 to RIBA 5 stage. The Sub-subcontractor shall be responsible for providing their own design and design for construction drawings, compliant with the design intent of the Contractors Designer. The Sub-subcontractor will be responsible for ensuring the submission and acceptance of their design from the Contractor and Contractor's design consultant through the Subcontractor. Works include the design , manufacture and supply of precast base, walls and roof units to site. Scope to include for, but not limited to, technical assurance, BIM modelling, asset scheduling and labelling, drawings for approval, as built drawings, indicative construction sequence methodology, submission of design packs, material approvals, and sustainability and environmental management. Sub-subcontractor to interface their design with incoming services as detailed on the construction drawings. Construction is currently forecasted to be carried Q2 2026 ## Key Details | Field | Value | | --- | --- | | Publication source | Contracts Finder | | Latest notice | https://www.contractsfinder.service.gov.uk/Notice/9c4a1667-7de9-41c2-8bab-b93f9f148938 | | Notice type | Tender Notice | | Procurement type | Standard | | Procurement category | Services | | Procurement method | Not Specified | | Procurement method details | Not specified | | Tender suitability | Not specified | | Awardee scale | Not specified | | All stages | Tender | ## Dates | Field | Value | | --- | --- | | Publication date | 4 Sep 2025 | | Submission deadline | 11 Sep 2025 | | Future notice date | Not specified | | Award date | Not specified | | Contract period | 27 Mar 2026 - 26 Mar 2027 | | Recurrence | Not specified | ## Values | Field | Value | | --- | --- | | Tender value | £1,000,000 | | Lots value | Not specified | | Awards value | Not specified | | Contracts value | Not specified | ## Status | Field | Value | | --- | --- | | Tender status | Active | | Lots status | Not specified | | Awards status | Not specified | | Contracts status | Not specified | ## Buyer | Field | Value | | --- | --- | | Main buyer | KILNBRIDGE CONSTRUCTION SERVICES LTD | | Locality | LONDON | | Post town | East London | | Postcode | E16 4TL | | Country | England | | ITL 1 | TLI London | | ITL 2 | TLI4 Inner London - East | | ITL 3 | TLI41 Hackney and Newham | | Local authority | Newham | | Electoral ward | Canning Town North | | Westminster constituency | West Ham and Beckton | | Delivery location | TLI London | ## CPV Codes ### Divisions - 51 - Installation services (except software) ### Codes - 51810000 - Installation services of tanks ## Release History - 4 Sep 2025 at 15:20 - Tender - Tender Notice - https://www.contractsfinder.service.gov.uk/Notice/9c4a1667-7de9-41c2-8bab-b93f9f148938 ## Documents - https://www.contractsfinder.service.gov.uk/Notice/9c4a1667-7de9-41c2-8bab-b93f9f148938 4th September 2025 - Opportunity notice on Contracts Finder - https://www.competefor.com/business/viewOpportunityDetailsSupplier.html?id=99297024 Please follow this link to view the notice. ## 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-b5fd17-8a01bc23-ff2c-4fa2-9ab8-3e551d2028bc. The underlying structured data is available as OCDS JSON at https://d3tenders.com/contract/ocds-b5fd17-8a01bc23-ff2c-4fa2-9ab8-3e551d2028bc.json.