Project record

Welsh Water service-reservoir cleaning and minor refurbishment

Participation
Submissions closed
Submission deadline
Participation checked

Conditions-of-participation deadline passed 2 November 2026 at 23:59 UTC; next advertised stages are selection and ITT rounds

Participation source

The conditions-of-participation deadline for Welsh Water's DCWW2115 reservoir-maintenance framework passed on 2 November 2026 at 23:59 UTC. The advertised competition proposes two suppliers for cleaning, inspection and minor refurbishment across approximately 828 potable-water tanks.

Welsh Water DCWW2115 scope chart separating reservoir cleaning and minor repairs from structural and hydraulic exclusions

IMWO original framework scope chart, based on Welsh Water DCWW2115 procurement notice

Location

United Kingdom / Europe

Segment

Service-reservoir maintenance

Phase

Tender / Confirmed

Last checked

3 November 2026

Coverage

Related sectors

Service-reservoir maintenance is the primary work classification. Related sectors connect this record to adjacent marine delivery and market coverage.

Subject index

Related subjects

These subject pages bring together related projects, technical articles, reports, and evidence methods.

Project anatomy

Contract scope and delivery roles

Client / authority
Dwr Cymru Cyfyngedig (Welsh Water)
Procurement references
DCWW2115; 094342-2026; ocds-h6vhtk-0781d8
Delivery parties
Two framework suppliers proposed; appointments not disclosed
Contract route
DCWW2115 / UK4 notice 094342-2026 uses a competitive flexible procedure: participation conditions, then two ITT rounds with potential negotiation and down-selection. The named DCC eSourcing portal handles registration, expression of interest, attachment access and electronic submission. Detailed qualification requirements and selection documents have not been obtained.
Execution window
Proposed initial service term: 15 May 2027 to 15 May 2030, with up to five further years in 2 + 2 + 1 extensions, conditional on supplier performance and operational circumstances. Actual service commencement remains unconfirmed.
Works package
Cleaning, disinfection, inspection and minor repair of potable-water storage. Repairs cover concrete, steelwork, protective finishes, membranes, access ladders, pipework, joints and external earthworks. Exclusions are structural tank modifications, surrounding embankments, changes affecting hydraulic performance or operating capacity, and work requiring a Reservoirs Act Panel Engineer.
Marine interfaces
Drain-down, water-quality controls, inspection and reinstatement govern the return of tanks to service. The notice references DCC standard PNL 810. DWI's 2025 Wales report separately identifies ingress and limited storage resilience as inspection risks; its historical national inventory differs from the tender's estate scope.
Commercial evidence boundary
The initial three-year estimate is GBP 25.5 million excluding VAT, or GBP 30.6 million including VAT. The notice describes GBP 68 million over the maximum eight-year term. Routine call-offs would consider geography, capacity, workload and performance; larger or complex requirements may use mini-competition. Estimates and optional extensions provide no guaranteed supplier revenue.

Contract and delivery chain

Work packages and named roles

Published scope, named parties and supporting evidence for each workstream.

Procurement ownership

Reservoir cleaning, inspection and minor refurbishment

Named party
Dwr Cymru Cyfyngedig
Evidence status
Confirmed
Source position
The UK4 notice defines the proposed services, exclusions and participation-condition round; detailed attachments remain to be obtained. Source
Framework appointments

Two suppliers and subsequent call-offs

Named party
Suppliers not identified in the tender history
Evidence status
Not evidenced
Source position
The framework and work-allocation provisions are proposed; supplier selection and individual orders are not disclosed in this release.

Evidence gap

What remains unverified

Outstanding evidence

  • Buyer selection and invitations to ITT rounds
  • Any new deadline amendment or participation reopening
  • Site visits, down-selection and issued qualification documents
  • Call-off workload, acceptance, payment and security terms

Related records 1

Reporting status

Project phase
Tender
Evidence confidence
Confirmed
Last checked
3 November 2026
Cited sources
4

Sources and related records

Project changes Methodology Email a correction Project tracker
Source collections

Project sources 4