Qualla: River Shannon

River Shannon: Introduction

Sat, 23 May 2026 00:00:00 GMT

Photo credit Miguel Mendez from Malahide, Ireland, CC BY 2.0. She was warned not to go. Sionann, granddaughter of the Celtic sea-god Manannan mac Lir, had been told to stay away from Connla's Well, a sacred spring in the otherworld where the Salmon of Wisdom swam. In one version of the legend she caught and ate the salmon, becoming the wisest being on Earth. In another she merely drank from the well. Either way, the waters of the well burst forth, drowned her, and carried her body out to sea. She became the goddess of the river that now bears her name. The drowning is what matters: as the folklorist Patricia Monaghan put it, the death of a goddess in a river typically represents the dissolving of her divine power into the water, which then gives life to the land. The River Shannon, at 360 kilometres the longest river in the British Isles, is in Irish mythology a flow of feminine wisdom that has been giving life to the centre of Ireland for as long as anyone has measured it.

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Image: Miguel Mendez from Malahide, Ireland | CC BY 2.0

River Shannon: From the Pot

Sat, 23 May 2026 00:00:00 GMT

Photo credit Gerard Lovett from ireland, CC BY 2.0. By tradition the Shannon rises in the Shannon Pot, a small dark pool on the southern slope of Cuilcagh Mountain in the townland of Derrylahan, County Cavan. From the surface it looks unimpressive, a quiet round pool with a stream trickling out. Beneath, it is the gathering point ...

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Image: Gerard Lovett from ireland | CC BY 2.0

River Shannon: Ptolemy's Sinew

Sat, 23 May 2026 00:00:00 GMT

Photo credit Caitlin, CC BY 2.0. The Shannon has been on maps for longer than almost any other river in Western Europe. The Graeco-Egyptian geographer Ptolemy, writing in Alexandria around 150 AD, recorded a river in Ireland called Senos, from the Proto-Indo-European root meaning 'to bind,' the same root that gi...

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Image: Caitlin | CC BY 2.0

River Shannon: The Three Loughs and a Question of Length

Sat, 23 May 2026 00:00:00 GMT

Photo credit Adrian King, CC BY-SA 2.0. The river is, by most measures, lazy. It falls only 18 metres in its first 250 kilometres, and only 76 metres total above sea level. As a result it widens into a series of enormous loughs: Lough Allen, then Lough Ree, then Lough Derg, each of which is more lake than river. About ...

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Image: Adrian King | CC BY-SA 2.0

River Shannon: Telford's Locks and Ardnacrusha's Dam

Sat, 23 May 2026 00:00:00 GMT

Photo credit Laurel Lodged, Public domain. The first serious attempt to improve navigation came in 1755, when the Commissioners of Inland Navigation ordered an English engineer named Thomas Omer, possibly of Dutch origin, to begin work. He built lateral canals and locks at four obstructed places between Lough Derg and Lou...

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Image: Laurel Lodged | Public domain

River Shannon: Bauxite, Eel and the Pipeline Question

Sat, 23 May 2026 00:00:00 GMT

Photo credit Andreas F. Borchert, CC BY-SA 4.0. Modern Shannon estuary trade is dominated by heavy industrial cargoes that the medieval Vikings would not have recognised. In 1982 a large-scale alumina extraction plant opened at Aughinish. 60,000-tonne cargo vessels now carry raw bauxite from West African mines to be refined in...

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Image: Andreas F. Borchert | CC BY-SA 4.0