Milford Haven Waterway
ria, or flooded valley, in Pembrokeshire, south-west Wales, UK
Milford Haven Waterway (Welsh: Dyfrffordd Aberdaugleddau), or simply Milford Haven (Welsh: Aberdaugleddau), is a natural harbour in Pembrokeshire, Wales. It is a ria or drowned valley which was flooded at the end of the last ice age. The Daugleddau estuary winds west to the sea. As one of the deepest natural harbours in the world, it is a busy shipping channel, trafficked by ferries from Pembroke Dock to Ireland, oil tankers and pleasure craft. Admiral Horatio Nelson, visiting the haven with the Hamiltons, described it as the next best natural harbour to Trincomalee in Ceylon (today's Sri Lanka) and "the finest port in Christendom". Much of the coastline of the Waterway is designated as a Site of Special Scientific Interest, listed as Milford Haven Waterway SSSI.
Toponymy
The name Milford derives from the Old Norse Melfjǫrðr, meaning "fjord of the sandbank". The English word haven was added to the name in the 14th century. The harbour is known in Welsh as Aberdaugleddau, meaning "mouth of the Daugleddau". The latter name means "both Cleddaus", the Daugleddau being formed by the junction of the Eastern Cleddau River and the Western Cleddau River.
History
Early history
From the 790s until the Norman Invasion in 1066, the waterway was used occasionally by Vikings looking for shelter.
The public source identifies “Milford Haven Waterway” as ria, or flooded valley, in Pembrokeshire, south-west Wales, UK. This brief keeps that definition visible, then builds a research path around Milford, Haven and Waterway.
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The citation trail is more important than the brevity of the summary: it shows where individual claims can be examined in context. The source revision retrieved here is dated Aug 6, 2026. The linked authority identifier is Q166885. Authority coordinates are 51.700, -5.117. 1 of 1 selected statements include explicit references; 0 carry qualifiers and 0 use preferred rank. The first chronological checks are 1066.
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This entry incorporates text from “Milford Haven Waterway” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.