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Contract awardedDam construction

Reservoir Safety Improvement Works / Expression of Interest

Specialist civil engineering works focused on reservoir safety improvements, including structural repairs, embankment stabilization, and spillway modifications. The scope involves technical engineering design and construction activities to ensure compliance with reservoir safety legislation and dam integrity standards. Projects are site-specific and involve complex hydraulic and geotechnical engineering requirements.

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Awarded value
£232k
As published
Published
16 March 2026
Awarded
13 July 2026
William Hughes (Civil Engineering) Ltd
Contract length
2 months
Ends 25 August 2026

What the contract covers

Works contract

Provision of civil engineering and construction services for reservoir safety improvements, including structural repairs, embankment works, and spillway maintenance projects.

  • Construction of a new siphon pipe by repurposing one of the four existing spillways (Spillway ‘C’) to contain the new HDPE siphon and subsequently backfilling with mass concrete or aggregate, installing the upstream leg using qualified divers with partial demolition work to the chamber, and abandoning Spillway ‘D’ in situ by forming a wall across the existing channel at Llyn Mair Reservoir

Terms and requirements

Contract type
Works contract
Procedure
Selective procedure
Contract dates
25 June 2026 to 25 August 2026
Certifications asked for
None stated
Suitable for SMEs
Not stated
Category
Works
CPV codes
71000000, 45000000, 45247200, 45240000

Services in this contract

Lifecycle

  1. Published
  2. Contract awardedto William Hughes (Civil Engineering) Ltd
  3. Contract starts
  4. Contract ends
The buyer

Eryri National Park Authority

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The supplier

William Hughes (Civil Engineering) Ltd

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Cite this contract

Link
https://bidskim.com/tender/1300558/reservoir-safety-improvement-works-expression-of-interest
Buyer reference
167687
Open contracting ID
ocds-kuma6s-162929
Last checked
5 November 2026

Eryri National Park Authority. Reservoir Safety Improvement Works / Expression of Interest. Contract award, 16 March 2026. BidSkim, https://bidskim.com/tender/1300558/reservoir-safety-improvement-works-expression-of-interest (accessed 5 November 2026).