---
title: "Investigation of regulated tidal exchange and water level control structures for management of saline lagoons at North Killingholme Haven Pits Site of Special Scientific Interest, North East Lincolnshire"
ocid: "ocds-h6vhtk-05644a"
canonical_url: "https://d3tenders.com/contract/?ocid=ocds-h6vhtk-05644a"
markdown_url: "https://d3tenders.com/contract/ocds-h6vhtk-05644a.md"
json_url: "https://d3tenders.com/contract/ocds-h6vhtk-05644a.json"
source: "Find A Tender Service"
current_stage: "Tender"
buyer: "NATURAL ENGLAND"
published: "2025-09-02"
---

# Investigation of regulated tidal exchange and water level control structures for management of saline lagoons at North Killingholme Haven Pits Site of Special Scientific Interest, North East Lincolnshire

Buyer: NATURAL ENGLAND  
Current stage: Tender  
OCID: ocds-h6vhtk-05644a

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## Summary

The procurement process led by Natural England centred around an investigation of tidal exchange and water level control strategies at the North Killingholme Haven Pits Site of Special Scientific Interest in North East Lincolnshire, was ultimately cancelled on 2 September 2025 due to no bids being received. The initial tender period, announced in July 2025 under an open competition method, was aimed at environmental services, specifically at enhancing the management of saline lagoons, and was to commence on 1 September 2025. The entire task needed to be completed with a final report due by 1 March 2026. Despite the detailed request for technical and practical expertise, particularly concerning the challenging terrain, the tender did not progress to the award stage.

This tender, despite its cancellation, highlights opportunities for specialists in environmental services. Businesses with capabilities in complex site surveys, water management systems, and environmental engineering, especially those accustomed to working in challenging terrains, like tidal mudflats and railway-adjacent land, would've been well-positioned to benefit. As the procurement method was open and below threshold, it could particularly attract small and medium-sized enterprises (SMEs). Though this specific opportunity has lapsed, the detailed nature of the project's requirements suggests potential for future tenders with similar scopes from Natural England or comparable organisations, given the ongoing need for environmental management and infrastructure maintenance in protected areas.

## Notice

North Killingholme Haven Pits SSSI is near Immingham, North East Lincolnshire, on the south bank of the Humber Estuary (central grid reference TA1662919816). The privately owned,16ha, site comprises former clay pits which have developed into saline lagoons. It is within the Humber Estuary Special Protection Area/Ramsar site and is of international importance for non-breeding waterfowl. The site is connected to the Humber Estuary by a manually operated sluice in the flood bank, which allows for the regulated exchange of tidal water. The sluice is over 50 years old and is not fully functioning due to siltation, and health and safety concerns regarding its operation. The aims of the investigation are to survey the existing water level control structures on site, and appraise the options for management of water levels to achieve the site objectives. Outputs include a levels survey, concept designs and estimated costs for each option and associated actions. Site surveys are required. Technical and practical expertise is required. This is difficult terrain due to tidal mudflats and open water. There is also a working railway line. A site-based risk assessment will be required to be submitted to Natural England. Contract to start 1 September 2025, with final report to be submitted by 1 March 2026.

## Key Details

| Field | Value |
| --- | --- |
| Publication source | Find A Tender Service |
| Latest notice | https://www.find-tender.service.gov.uk/Notice/052989-2025 |
| Notice type | UK12 - Procurement Termination Notice |
| Procurement type | Standard |
| Procurement category | Services |
| Procurement method | Open |
| Procurement method details | Below threshold - open competition |
| Tender suitability | SME |
| Awardee scale | Not specified |
| All stages | Tender |

## Dates

| Field | Value |
| --- | --- |
| Publication date | 2 Sep 2025 |
| Submission deadline | 13 Aug 2025 |
| Future notice date | Not specified |
| Award date | Not specified |
| Contract period | 31 Aug 2025 - 1 Mar 2026 |
| Recurrence | Not specified |

## Values

| Field | Value |
| --- | --- |
| Tender value | £5,600 |
| Lots value | £5,600 |
| Awards value | Not specified |
| Contracts value | Not specified |

## Status

| Field | Value |
| --- | --- |
| Tender status | Complete |
| Lots status | Complete |
| Awards status | Cancelled |
| Contracts status | Not specified |

## Buyer

| Field | Value |
| --- | --- |
| Main buyer | NATURAL ENGLAND |
| Additional buyers | Missing |
| Locality | LONDON |
| Post town | South West London |
| Postcode | SW1P 4DF |
| Country | England |
| ITL 1 | TLI London |
| ITL 2 | TLI3 Inner London - West |
| ITL 3 | TLI35 Westminster and City of London |
| Local authority | Westminster |
| Electoral ward | St James's |
| Westminster constituency | Cities of London and Westminster |
| Delivery location | TLE Yorkshire and The Humber |

## CPV Codes

### Divisions

- 90 - Sewage, refuse, cleaning and environmental services

### Codes

- 90700000 - Environmental services

## Release History

- 2 Sep 2025 at 07:50 - TenderCancellation - UK12 - Procurement Termination Notice - https://www.find-tender.service.gov.uk/Notice/052989-2025
- 28 Jul 2025 at 16:33 - TenderUpdate - UK4 - Tender Notice - https://www.find-tender.service.gov.uk/Notice/043645-2025
- 23 Jul 2025 at 07:29 - Tender - UK4 - Tender Notice - https://www.find-tender.service.gov.uk/Notice/042217-2025

## Documents

- https://www.find-tender.service.gov.uk/Notice/052989-2025
  2nd September 2025 - Procurement termination notice on Find a Tender
- https://www.find-tender.service.gov.uk/Notice/043645-2025
  28th July 2025 - Tender notice on Find a Tender
- https://www.find-tender.service.gov.uk/Notice/042217-2025
  23rd July 2025 - Tender notice on Find a Tender
- https://www.find-tender.service.gov.uk/Notice/Attachment/A-3393
  RFQ
- https://www.find-tender.service.gov.uk/Notice/Attachment/A-3394
  Commercial Response
- https://www.find-tender.service.gov.uk/Notice/Attachment/A-3546
  Clarifications to Bidders Questions

## Notice URLs

- https://www.legislation.gov.uk/ukpga/2023/54/contents

## Provenance

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