Supply Chain Notice: WAT0149-01 B Lock Penstock Replacements- Portsmouth Naval Base
£3,500,000 — stated in the notice
This is a contract result notice, not an open opportunity. Details from the official award data.
This is a large award for Industrial Machinery — above three-quarters of comparable contracts. Based on 5,734 valued Industrial Machinery tenders in our corpus.
The Tenderer should be aware that the works detailed in this package are constrained due to the nature of the location they are to be conducted in.
Project location- HM Naval Base Portsmouth The Contractor shall be expected to adhere by the HMNB site security requirements, all Contractors and Sub-Contractors shall be BPSS security vetted and will be required to hold the relevant site security passes.
The Contractor shall be expected to hold the following levels of insurance £10m Public Liability, £10m Product Liability, £5m Professional Indemnity.
KBS Maritime - Introduction KBS Maritime is a joint venture between KBR and BAE Systems, bringing together two global players with a rich heritage of delivering excellence, innovation and reliability.
The joint venture will combine the expertise of KBR as a global leader in infrastructure asset management and services with BAE Systems' experience and capability within Portsmouth Naval Base.
KBS Maritime are delivering an ambitious, modern and enduring change to the Portsmouth Naval base infrastructure, securing investment in the local community and ensuring fit-for-purpose, world-leading fleet support for the Royal Navy and the UK in the decades ahead.
Project Background KBS Maritime has a requirement for penstock replacements at B Lock within Portsmouth Naval Base.
The project consists of 10 in number replacement penstocks in 6 chambers overall.
The penstock system controls sea water via a culvert system between the harbour, the basin and the dry docks.
These include levelling penstocks of circa 8 metres deep to drainage penstocks circa 18 metres deep.
The replacement programme will replace the current cast irons doors with new with specification to be agreed along with the associated shafts, wedges, door nut, brackets, platforms, ladders and actuation and road plates.
This project is due to commence in Q4 2026 with all to be replaced by Feb 2030.
Contractors must be able to demonstrate design, manufacture and installation of penstock replacements in a marine environment including all site management under CDM regulations and competency of Health and Safety compliance and safe practices.
Contractors must also possess at least five years' experience working within a marine environment.
Contractors who do not provide suitable and sufficient evidence of this will not be considered.
Key Dates (approximate) - Expressions of Interest close: 18/06/2026 - Bidders Selected: by end of June 2026 - ITT Published: early July 2026 - ITT Close: early September 2026 - Project commencement: December 2026 - Project Completion Feb 2030
What the notice asks for
The Tenderer should be aware that
The Tenderer should be aware that the works detailed in this package are constrained due to the nature of the location they are to be conducted in.
The Contractor shall be expected to adhere
The Contractor shall be expected to adhere by the HMNB site security requirements, all Contractors and Sub-Contractors shall be BPSS security vetted and will be required to hold the relevant site security passes.
The Contractor shall be expected to hold
The Contractor shall be expected to hold the following levels of insurance £10m Public Liability, £10m Product Liability, £5m Professional Indemnity.
KBS Maritime are delivering an ambitious, modern
KBS Maritime are delivering an ambitious, modern and enduring change to the Portsmouth Naval base infrastructure, securing investment in the local community and ensuring fit-for-purpose, world-leading fleet support for the Royal Navy and the UK in the decades ahead.
Contractors must be able to demonstrate design
Contractors must be able to demonstrate design, manufacture and installation of penstock replacements in a marine environment including all site management under CDM regulations and competency of Health and Safety compliance and safe practices.
Sentences from the notice that state an obligation, surfaced automatically and shown in the order they appear. Not an exhaustive list — always confirm against the tender documents.
What this notice demands of you
3 named in obligation language, 0 mentioned. Each one is quoted from the notice.
The Contractor shall be expected to adhere by the HMNB site security requirements, all Contractors and Sub-Contractors shall be BPSS security vetted and will be required to hold the relevant site security passes.
The Contractor shall be expected to hold the following levels of insurance £10m Public Liability, £10m Product Liability, £5m Professional Indemnity.
The Contractor shall be expected to hold the following levels of insurance £10m Public Liability, £10m Product Liability, £5m Professional Indemnity.
Matched against the notice text, so this is a floor — the tender pack will demand things the notice never mentions. “Says must” means the quoted sentence itself used obligation language; anything ambiguous is left as a mention.
Make the case to bid
Reveal who to approach at Ministry of Defence, and generate a go-to-market strategy from their news, accounts and people.
Free to start. Named contacts come from published notices; the strategy is generated from the buyer’s news, accounts and people.
- OCID
- 194a8516-37fa-4d45-8bc5-bf2a03252d40
- Stage
- contract · Contract
- Source
- Contracts Finder
- Buyer ref
- tender_533183/1579757
Contains public sector information licensed under the Open Government Licence v3.0. Source data © Crown copyright.
Who wins this kind of work
The suppliers and buyers around this opportunity — drawn from official award data. Drag to orbit; click a node to explore.
Top suppliers & buyers in Industrial Machinery
Ministry of Defence’s tender network
Similar open tenders
Supply, Delivery, Installation, Commissioning and Maintenance of an Electric Forklift Truck
Civil Nuclear Police Authority (CNPA) / Civil Nuclear Constabulary (CNC)
Supply of Automatic BA Washing Machine, Installation and Associated Works
South Wales Fire and Rescue Service