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| Eastern Cleddau | |
|---|---|
| Name | Eastern Cleddau |
| Country | Wales |
| County | Pembrokeshire, Carmarthenshire |
| Length km | 19 |
| Source | Preseli Hills |
| Mouth | Cleddau Estuary |
| Basin countries | Wales |
Eastern Cleddau The Eastern Cleddau is a river in west Wales feeding the Cleddau Estuary and Milford Haven Waterway. It rises on the slopes of the Preseli Hills and flows past communities such as Llangwm, Haverfordwest, and Llawhaden, joining the Western Cleddau to form an estuarine system with links to Milford Haven. The river corridor intersects landscapes associated with Pembrokeshire Coast National Park, Carmarthenshire County Council jurisdiction, and traditional Welsh parishes.
The river originates near the Preseli Hills and traverses terrain shaped by Devonian and Cambrian geology before entering the lowland vale around Crymych and Clynderwen. It flows southwesterly through valleys and the town of Clunderwen before reaching the medieval borough of Haverfordwest and the parish of Llawhaden. The Eastern Cleddau meets the Western Cleddau near Pembroke Dock and Milford Haven, forming a ria that connects to the Celtic Sea and influenced by tidal exchange from the Atlantic Ocean and Irish Sea. The river’s catchment spans parts of Pembrokeshire Coast National Park, the Pembrokeshire Coast Path hinterland, and landscapes recorded by the Royal Commission on the Ancient and Historical Monuments of Wales.
Hydrologically, the river receives flow from upland streams draining the Preseli Hills, including tributaries near Trefin, Nolton, and the Teifi catchment boundary. Measured by agencies such as the Natural Resources Wales and historically observed by the Met Office, discharge varies with Atlantic weather systems and seasonal rainfall from the Cardigan Bay region. Tributaries and feeder streams run through parishes like Narberth and Cwm Gwaun and cross transport corridors such as the A40 and A477. Flood events have been recorded in the historical archives of Pembrokeshire County Council and in reports by the Environment Agency predecessors.
The Eastern Cleddau supports riparian habitats that provide for species recorded by conservation bodies like Natural Resources Wales and the Royal Society for the Protection of Birds. Wet woodland and marshy grassland along the banks host plants catalogued in surveys by the National Museum Cardiff and the Botanical Society of Britain and Ireland. Aquatic fauna include migratory populations of Atlantic salmon, European eel, and resident brown trout monitored by the Wild Trout Trust and angling clubs in Haverfordwest. Birdlife associated with the estuarine convergence includes common tern, oystercatcher, and wintering waders noted by BirdLife International partners. Invertebrate assemblages and bat foraging activity have been surveyed by local branches of the Wildlife Trust of South and West Wales.
Human presence along the river is documented from prehistoric times in archaeological records curated by the Royal Commission on the Ancient and Historical Monuments of Wales and museums such as the National Museum Cardiff. Medieval structures including the castle at Llawhaden and market records from Haverfordwest reflect the river’s role in transport and local trade. During the Industrial Revolution, water-powered mills and small-scale quarrying tied to enterprises registered in Cardiff and Swansea influenced settlement patterns. Maritime activity linked the Cleddau system to ports such as Milford Haven and shipyards in Pembroke Dock, with naval associations recorded by the National Maritime Museum Cornwall and archives in the National Library of Wales.
Bridges and crossings on the river include historic masonry spans and modern structures maintained by Pembrokeshire County Council and regional authorities; road links intersecting the river include the A40 and local B-roads leading to Llangwm. Navigation is constrained upstream, while the estuarine reach supports commercial traffic to Milford Haven Port Authority facilities and leisure craft associated with marinas and clubs recorded by the Royal Yachting Association. Flood defenses and culverts have been implemented following guidance from the UK Department for Environment, Food and Rural Affairs and technical reports by civil engineering firms contracted by local councils. Historical navigation rights and estuary use appear in records held by the National Archives (UK).
Conservation designations affecting the basin include sites of interest overseen by Natural Resources Wales, with advisory input from organisations such as the Pembrokeshire Coast National Park Authority and the Wildlife Trust of South and West Wales. River management plans align with national frameworks established by the Welsh Government and compliance monitoring by agencies including the Environment Agency predecessor bodies. Local initiatives involve community groups, parish councils like Llawhaden Community Council, angling associations, and educational outreach from institutions such as the University of Wales Trinity Saint David and the Pembrokeshire Coast National Park Authority education programs. Restoration and monitoring projects have been supported by funding mechanisms provided by Heritage Lottery Fund grants and collaborative research with teams from the British Geological Survey and environmental consultancies.
Category:Rivers of Pembrokeshire