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Severn Eels 1/5 The annual glass eel migration is underway on the River Severn. Around 100 million critically endangered baby eels are fighting their way upstream right now. #EuropeanEel #RiverSevern #EelCrisis

16,843 views • 7 months ago •via X (Twitter)

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Ardnacrusha hydroelectric station yesterday evening, when ESB was abstracting almost 70% of the flow in the Lower River Shannon Special Area of Conservation (SAC). Water is diverted at Parteen Regulating Weir, and this abstraction affects over 15kms of internationally designated Natura 2000 river. ❌This is not “clean energy” and it is not “powering Ireland”, despite ESB’s claims. As seen in the video, much of the water taken from the SAC is simply being dumped through the spillway rather than used for hydroelectric generation. ⚠️This is a critical period for fish migration. Upstream migrating Atlantic salmon (Salmo salar) and River Lampreys (Lampetra fluviatilis) are following this diverted water into the tailrace, where they become trapped and are unlikely ever to spawn. Both species are Qualifying Interests of the SAC. ⚠️Downstream migrating critically endangered eels also follow the water into the unscreened turbines. Eels are also likely to get harmed if they pass though this 30m high spillway. They will also be exposed to 'gas supersaturation' in the tailrace and injured and disorientated fish are very vulnerable to predation. ⚠️The white screen on the station visible in the video is related to an ongoing multi-million-euro refurbishment, carried out entirely outside the planning system with no environmental assessment. Water management decisions are being made day-to-day and have varied significantly in recent years. ⚠️The water management ‘plan’ for this station is new, the refurbishment ‘project’ is ongoing, and both are having significant effects on the environment and the Lower River Shannon SAC. These impacts are cumulative with the impacts of the 1920s scheme and required Environmental Impact Assessment (EIA) and Appropriate Assessment (AA). ⚠️Salmon runs on the River Shannon have collapsed, and the entire SAC is being damaged by the unsustainable management of this hydroelectric scheme. The refurbishment was a major opportunity to implement mitigation measures to protect endangered fish, yet nothing was done. However, the key ecological problem on the Lower River Shannon is the over-abstraction of water. No fish pass could ever work with the situation shown in this video for example. ❌The current management of this hydroelectric scheme is incompatible with the legal requirements of the EU Habitats Directive and the Water Framework Directive. ✅What is needed is a formal SAC management plan for this Natura 2000 river, one that balances electricity generation with biodiversity, fisheries, flood risk management, and the needs of local communities.

Ecofact

162,120 views • 10 months ago