---
title: "WP3370-Drainage Works - CTA Main Works"
ocid: "ocds-b5fd17-44b98a2c-57dd-4323-876e-e1106e7a8c42"
canonical_url: "https://d3tenders.com/contract/?ocid=ocds-b5fd17-44b98a2c-57dd-4323-876e-e1106e7a8c42"
markdown_url: "https://d3tenders.com/contract/ocds-b5fd17-44b98a2c-57dd-4323-876e-e1106e7a8c42.md"
json_url: "https://d3tenders.com/contract/ocds-b5fd17-44b98a2c-57dd-4323-876e-e1106e7a8c42.json"
source: "Contracts Finder"
current_stage: "Tender"
buyer: "COSTAIN LIMITED (H7-HEATHROW)"
published: "2025-10-21"
---

# WP3370-Drainage Works - CTA Main Works

Buyer: COSTAIN LIMITED (H7-HEATHROW)  
Current stage: Tender  
OCID: ocds-b5fd17-44b98a2c-57dd-4323-876e-e1106e7a8c42

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## Summary

The procurement process initiated by Costain Limited (H7-Heathrow) involves a tender titled "WP3370-Drainage Works - CTA Main Works" in the industry category of drainage works, classified under the CPV code 45232452. This tender is currently at the Tender stage and was published on 21st October 2025. The contract location is London, United Kingdom, and the tender period concludes on 27th October 2025. This project involves repairs to the existing drainage systems near tunnel portals, including patch repairs using Cured In Place liners and robotic cutters, with a contract period from 13th March 2026 to 31st October 2026.

This tender presents significant opportunities for growth for businesses specialising in drainage construction, especially those capable of complex tunnel and carriageway works. It is particularly suitable for small and medium enterprises (SMEs) and voluntary, community, and social enterprises (VCSEs) willing to collaborate or independently manage projects within the stipulated financial bracket of £500,000 to £1,000,000. The procurement method is not specified, but businesses versed in infrastructure maintenance and enhancement in urban settings such as London will find this project strategically beneficial for expanding their service offerings and establishing a presence in public sector works.

## Notice

Drainage Overview: Repairs to the existing drainage in the immediate area outside the tunnel portals. Mostly patch repairs with Cured In Place liner. Some elements of robotic cutter required. Element of regrading required to side bore surface to address ponding issue Interfaces: None beyond standard tunnel working Constraints: Works in carriageway during bore closure only Quantities: CIP Liner: 4no. Robotic Cutter to Remove

## Key Details

| Field | Value |
| --- | --- |
| Publication source | Contracts Finder |
| Latest notice | https://www.contractsfinder.service.gov.uk/Notice/a0aa0cce-9d43-46b7-9070-3e7cf53a71d3 |
| Notice type | Tender Notice |
| Procurement type | Standard |
| Procurement category | Works |
| Procurement method | Not Specified |
| Procurement method details | Not specified |
| Tender suitability | SME, VCSE |
| Awardee scale | Not specified |
| All stages | Tender |

## Dates

| Field | Value |
| --- | --- |
| Publication date | 21 Oct 2025 |
| Submission deadline | 27 Oct 2025 |
| Future notice date | Not specified |
| Award date | Not specified |
| Contract period | 13 Mar 2026 - 31 Oct 2026 |
| 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 | COSTAIN LIMITED (H7-HEATHROW) |
| Locality | MAIDENHEAD |
| Post town | Slough |
| Postcode | SL6 4UB |
| Country | England |
| ITL 1 | TLJ South East (England) |
| ITL 2 | TLJ1 Berkshire, Buckinghamshire and Oxfordshire |
| ITL 3 | TLJ15 Berkshire East |
| Local authority | Windsor and Maidenhead |
| Electoral ward | Oldfield |
| Westminster constituency | Maidenhead |
| Delivery location | TLI London |

## CPV Codes

### Divisions

- 45 - Construction work

### Codes

- 45232450 - Drainage construction works
- 45232452 - Drainage works

## Release History

- 21 Oct 2025 at 08:30 - Tender - Tender Notice - https://www.contractsfinder.service.gov.uk/Notice/a0aa0cce-9d43-46b7-9070-3e7cf53a71d3

## Documents

- https://www.contractsfinder.service.gov.uk/Notice/a0aa0cce-9d43-46b7-9070-3e7cf53a71d3
  21st October 2025 - Opportunity notice on Contracts Finder
- https://www.competefor.com/business/viewOpportunityDetailsSupplier.html?id=101492353
  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-b5fd17-44b98a2c-57dd-4323-876e-e1106e7a8c42. The underlying structured data is available as OCDS JSON at https://d3tenders.com/contract/ocds-b5fd17-44b98a2c-57dd-4323-876e-e1106e7a8c42.json.