Llyn Celyn Reservoir Pour - Concrete Structures & Floors (CSF)

Описание: ConcreteSF | The Addition of the UK’s Largest Spillway at Llyn Celyn Reservoir – Project Progress

In early 2024, our ConcreteSF team arrived in stunning Bala, North Wales, to begin work on an auxiliary spillway at the historic Llyn Celyn Reservoir. This vital Welsh Water project—delivered in partnership with JN Bentley Ltd—will greatly improve flood resilience for communities downstream.

🛠 Project Background

Reservoir history: Built 1960–65 to supply Liverpool, Llyn Celyn flooded the Tryweryn Valley and Capel Celyn village—a story of engineering and controversy.

New challenge: Climate change is driving more extreme rainfall and flood risk. A 2020 inspection confirmed the dam’s safety but warned that a breach could be catastrophic (a 1‑in‑10,000‑year event).

🔨 Spillway Solution

An auxiliary spillway will divert excess water from the dam crest (next to the A4212 car park) down the hillside—protecting local homes and farmland.

After ecological and ground investigations, planners at Eryri National Park approved the design, and CSF moved in to deliver the concrete works.

🚧 ConcreteSF on Site

January 2024: Our team mobilised as Phase 1 groundworks completed.

Early pours: We installed blinding strips, formwork, reinforcement cages, and beam supports.

Video highlights: Watch our pumps in action as we execute Pours 1 & 2—laying the foundations for a spillway designed to last generations.

📆 What’s Next?
Follow our channel and visit concretesf.co.uk for monthly updates—from reinforcement installation and formwork to final pours and finishing touches—over the next 12 months.

🔗 Learn more & read the full project story:
https://www.concretesf.co.uk/post/the...

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