Marine Survey Framework
National Grid is an international Electricity and Gas Network Company based in the UK, with operations in north-eastern US. And one of the largest investor-owned energy companies in the world. National Grid are looking to set up a multi-year Marine Survey Framework to service offshore cable laying as part of the Great Grid Upgrade and may be utilised in the future for any Hydrogen Pipeline projects as applicable. The Framework will cover the full gamut of survey disciplines required for cable lay and subsequent mai...
Buyer
NATIONAL GRID UK LIMITED
Value
£250,000,000
Published
22 Sept 2025
Closes
13 Feb 2024
Procurement details
Source
Find a Tender
Region
Westminster
Procurement method
Selective
Category
Services
Contract starts
Not provided
Contract ends
Not provided
CPV classifications
71354500
Marine survey services
Lots
Lot 1 Lot 1 - Geophysical
£30,000,000
Non-intrusive surveys generally for route development along a corridor of seabed, including the collection, processing, reporting and delivery of bathymetric data; seabed classification and detection of objects with dimensions of 0.25m and larger; identification and characterisation of the sub-sea floor to around 25m depth; sub-surface measurements at landfa...
Delivery: United Kingdom, Belgique-België, Deutschland, Danmark, España, France
Lot 2 Lot 2 - Geotechnical
£35,000,000
Intrusive surveys to resolve the composition of the upper layers (5 to 10m) of seabed sediment along corridors already subject to a geophysical survey. Collection methods are not limited to, but currently utilise Core Penetration Tests and Vibrocorer sampling. This Page 9 to 37 work includes data collection from the landfall area to offshore. Nearshore, Inte...
Delivery: United Kingdom, Belgique-België, Deutschland, Danmark, España, France
Lot 3 Lot 3 - Environmental
£20,000,000
Collection of data to establish the benthic ecology along chosen routes. Currently utilises the interpretation of acoustic geophysical data, video and photographic surveys of the benthic environment and benthic grab/core sampling, although other techniques such as eDNA sampling may be considered depending on the agreement of consent agencies. Laboratory test...
Delivery: United Kingdom, Belgique-België, Deutschland, Danmark, España, France
Lot 4 Lot 4 - Intertidal/Landing
£15,000,000
Non-intrusive survey of the intertidal and topographic elements of the cable landing site utilising bathymetric/topographic lidar and imagery techniques to provide a continuous elevation model and classification of the seabed/land. It is expected that this will be from approximately from the 5m LAT depth contour to at least 250m inland but may extend further...
Delivery: United Kingdom, Belgique-België, Deutschland, Danmark, España, France
Lot 5 Lot 5 UXO Route Survey
£60,000,000
Collection of both land and marine detailed hi-resolution geophysical data to allow the provision of potential UXO targets to be identified. This will include a range of non-intrusive marine techniques including Multi-Beam Echo Sounders, Side Scan Sonars and Magnetometers but optimised for UXO detection and identification along a narrower route corridor. Lan...
Delivery: United Kingdom, Belgique-België, Deutschland, Danmark, España, France
Lot 6 Lot 6 UXO Target Investigation. Nearshore Diving
£15,000,000
Following the successful acquisition of UXO Survey data as described in Lot 5, target investigation on identified potential targets is required to confirm status. This nearshore scope is for water depths less than circa 10m where diving is the only practical solution to identify targets due to water depth. Visual identification and a target inspection report...
Delivery: United Kingdom, Belgique-België, Deutschland, Danmark, España, France
Lot 7 Lot 7 UXO Target Investigation: Offshore ROV
£20,000,000
Following the successful acquisition of UXO Survey data as described in Lot 5, target investigation on identified potential targets is required to confirm status. This nearshore scope is for water depths greater than circa 10m where an ROV solution is possible to identify targets due to sufficient water depth. Visual identification and an inspection report i...
Delivery: United Kingdom, Belgique-België, Deutschland, Danmark, España, France
Lot 8 Lot 8 UXO Clearance/Detonation
£20,000,000
Following the confirmed identification of UXO from Lot 5-7, it is requested that a solution is presented to safely neutralise the ordnance using best industry practice to allow a clearance certificate to be produced. Techniques may include detonation, low-order detonation, Page 28 to 37 removal, or other innovative solutions to safely remove the threat of th...
Delivery: United Kingdom, Belgique-België, Deutschland, Danmark, España, France
Lot 9 Lot 9 Low Carbon Geophysical / Small Maintenance Projects
£35,000,000
A non-intrusive survey to provide an initial assessment of potential routes and assessment of the continued physical security of in-service subsea assets. It is expected that this will generally utilise Multi-Beam Echo Sounders and backscatter, as well as Side Scan Sonar and magnetometer for some projects. This work includes data collection from the intertid...
Delivery: United Kingdom, Belgique-België, Deutschland, Danmark, España, France
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