---
title: "National Tide Gauge Network Support & Maintenance 2025 - 2030"
ocid: "ocds-h6vhtk-04c572"
canonical_url: "https://d3tenders.com/contract/?ocid=ocds-h6vhtk-04c572"
markdown_url: "https://d3tenders.com/contract/ocds-h6vhtk-04c572.md"
json_url: "https://d3tenders.com/contract/ocds-h6vhtk-04c572.json"
source: "Find A Tender Service"
current_stage: "Award"
buyer: "ENVIRONMENT AGENCY"
published: "2025-04-24"
---

# National Tide Gauge Network Support & Maintenance 2025 - 2030

Buyer: ENVIRONMENT AGENCY  
Current stage: Award  
OCID: ocds-h6vhtk-04c572

[View canonical contract page](https://d3tenders.com/contract/?ocid=ocds-h6vhtk-04c572)  
[Download OCDS JSON](https://d3tenders.com/contract/ocds-h6vhtk-04c572.json)

## Summary

The Environment Agency has awarded a contract for the support and maintenance of the National Tide Gauge Network for the period 2025 to 2030. This procurement process, classified under oceanography and hydrology services, involves maintaining the performance of 42 tide gauges across locations including England, Scotland, Wales, Northern Ireland, Jersey, and the Isle of Man. The contract was awarded to National Oceanography Centre Innovations Limited, following an open procedure. Key dates include the contract signing on 25th March 2025. The procurement stage concluded at the award phase, with the contract now active, indicating its completion and commencement of services.

This tender offers substantial growth opportunities for businesses in oceanography services with expertise in maintaining and resolving faults with tide gauge equipment. Firms experienced in geodetic surveying or similar maintenance projects, particularly those familiar with regional and international data standards, will find this opportunity well-aligned with their capabilities. The involvement with the UK National Tide Gauge Network is particularly significant for companies aiming to contribute to critical flood forecasting and modelling efforts, presenting further avenues for collaboration and expertise enhancement within the environmental protection sector.

## Notice

The key requirements of this contract in relation to the UK National Tide Gauge Network are;
- Maintenance of 42 tide gauges to ensure the measuring performance of the gauge is compliant with the standards set in section 3
- Resolution of faults with the tide gauge measuring equipment and telemetry outstation to the standards set out in section 3
- Geodetic survey and levelling at sites to ensure datum control to the standards set out in section 3
- Engagement and communication with EA contract manager and EA Instruments and Systems team, and wider teams as necessary
- Liaison with the contractor responsible for the QA and archiving of the UKTGN data, currently British Oceanographic Data Centre.
- Liaison with landowners where our tide gauges are located to ensure continued access is retained for maintenance and repair works
- Adhering to the relevant Health and Safety and CDM regulations 2015 in the maintenance of the tide gauges.

### Lot Information

Lot 1

The Environment Agency owns and maintains 42 'Class A' strategic tide gauges, distributed around the UK coastline on behalf of the UK Coastal Flood Forecasting partnership. These are commonly referred to as the UKCFF tide gauges or UK National Tide Gauge Network (UKTGN). The network currently consists of 21 sites in England, 10 in Scotland, 7 in Wales, 2 in Northern Ireland, 1 in Jersey and 1 in the Isle of Man. The Environment Agency is responsible for and manages all gauges in the network. Use of the data is not restricted to the operating authority boundary in which a gauge is located, for example both the Environment Agency (England) and Natural Resources Wales (Wales) use the Liverpool tide gauge data in delivering their forecasting services.

These tide gauges are of critical importance in providing flood forecasting, warning, modelling, mapping and operational activities. The primary use of the network is to support the operational flood forecasting activities of the UK Flood Forecasting Authorities. The gauges are used to:
- Provide a strategic overview of real time coastal conditions around the UK.
- Track the progress of coastal surge around the UK waters.
- Develop and calibrate the coastal surge model hosted by the Met Office. 
- Produce high quality tide tables for key strategic locations in the UK for flood forecasting.
- Provide high quality archive data sets for use in coastal flood modelling and mapping applications and modelling of extreme sea levels.

The data are also used by academics and researchers for a variety of scientific uses such as monitoring mean sea level and sea level rise. Gauges at Newlyn, Stornoway and Lerwick form part of the Core GLOSS (Global Sea Level Observing System) network http://www.gloss-sealevel.org/ and are therefore of international significance. A further four gauges at Aberdeen, North Shields, Sheerness and Liverpool have been identified as key long-term trend sites for monitoring mean sea level.

The key requirements of this contract in relation to the UK National Tide Gauge Network are;
- Maintenance of 42 tide gauges to ensure the measuring performance of the gauge is compliant with the standards set in section 3
- Resolution of faults with the tide gauge measuring equipment and telemetry outstation to the standards set out in section 3
- Geodetic survey and levelling at sites to ensure datum control to the standards set out in section 3
- Engagement and communication with EA contract manager and EA Instruments and Systems team, and wider teams as necessary
- Liaison with the contractor responsible for the QA and archiving of the UKTGN data, currently British Oceanographic Data Centre.
- Liaison with landowners where our tide gauges are located to ensure continued access is retained for maintenance and repair works
- Adhering to the relevant Health and Safety and CDM regulations 2015 in the maintenance of the tide gauges.

## Key Details

| Field | Value |
| --- | --- |
| Publication source | Find A Tender Service |
| Latest notice | https://www.find-tender.service.gov.uk/Notice/016845-2025 |
| Notice type | Tender Notice |
| Procurement type | Standard |
| Procurement category | Services |
| Procurement method | Open |
| Procurement method details | Open procedure |
| Tender suitability | Not specified |
| Awardee scale | Large |
| All stages | Tender, Award |

## Dates

| Field | Value |
| --- | --- |
| Publication date | 24 Apr 2025 |
| Submission deadline | 24 Jan 2025 |
| Future notice date | Not specified |
| Award date | 25 Mar 2025 |
| Contract period | 14 Mar 2025 - 13 Mar 2030 |
| Recurrence | Not specified |

## Values

| Field | Value |
| --- | --- |
| Tender value | Not specified |
| Lots value | Not specified |
| Awards value | Not specified |
| Contracts value | £1,461,777 |

## Status

| Field | Value |
| --- | --- |
| Tender status | Complete |
| Lots status | Cancelled |
| Awards status | Active |
| Contracts status | Active |

## Buyer

| Field | Value |
| --- | --- |
| Main buyer | ENVIRONMENT AGENCY |
| Additional buyers | ENVIRONMENT AGENCY (DEFRA NETWORK ETENDERING PORTAL) |
| 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 | Not specified |

## Supplier

| Field | Value |
| --- | --- |
| Number of suppliers | 1 |
| Supplier names | NATIONAL OCEANOGRAPHY CENTRE INNOVATIONS |

## CPV Codes

### Divisions

- 71 - Architectural, construction, engineering and inspection services

### Codes

- 71351920 - Oceanography and hydrology services

## Release History

- 24 Apr 2025 at 15:03 - Award - Award Notice - https://www.find-tender.service.gov.uk/Notice/016845-2025
- 9 Dec 2024 at 08:50 - Tender - Tender Notice - https://www.find-tender.service.gov.uk/Notice/039525-2024

## Notice URLs

- http://www.gloss-sealevel.org/
- https://defra-family.force.com/s/Welcome
- https://noc.ac.uk/
- https://www.gov.uk/government/organisations/department-for-environment-food-rural-affairs
- https://www.gov.uk/government/publications/public-procurement-review-service-scope-and-remit

## 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-h6vhtk-04c572. The underlying structured data is available as OCDS JSON at https://d3tenders.com/contract/ocds-h6vhtk-04c572.json.