Tag Archives: clonlara

What’s a cumec, Daddy?

I don’t know, but here’s a picture of 415 of them flowing through Castleconnell. [Update 13 December: that may be only 405 cumec.]

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415 cumecs on 12 December 2015

Actually, a cumec is one cubic metre of water per second, which is roughly one ton per second, which is a lot of water. And 415 cumec is the amount that, according to the blatts, the ESB is currently letting down the original course of the Shannon from Parteen Villa Weir; the minimum flow in that channel, as seen in summer, is 10 cumec.

Castleconnell 12 December 2015

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Younger trees getting their feet wet

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Who’d have guessed?

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Below the bridge

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Above the bridge

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Stormont

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Pump

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Sandbags

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Sandbag Central

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Sandbags filled here for distribution

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Army engineers

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More equipment arriving

Clonlara 11 December 2015

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Ardnacrusha headrace, said to take 400 cumec

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Errina bridge on the Plassey-Errina Canal

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The stop planks seem to be quite effective …

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… as there is little water getting down the canal to Clonlara bridge

Park Canal 9 December 2015

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Depth gauge at Park Lock

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Lock chamber

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Full canal upstream

 

The Limerick Navigation: lock sizes

Here is a table showing the sizes of the locks on the (now abandoned) Limerick Navigation.

Boating off piste

Coast Guard rescue between O’Briensbridge and Clonlara.

Ardnacrusha

Killaloe Coast Guard report here.

Anguilla anguilla: the ESB eel fishery

This photo shows an eel spear from the National Folklife Collection‘s overflow material, stored in the former “reformatory” at Daingean, on the Grand Canal in Co Offaly. There were many spears there, with different designs from different rivers. This one, to judge from the label underneath it, came from the extraordinarily prolific and observant Dr A E J Went.

If you look at pretty well any Irish river on the 1840s Ordnance Survey map (here’s the Shannon at Killaloe; switch to Historic 6″ if necessary), or indeed on the 1900s map (same URL but switch to Historic 25″), you’ll find evidence of eel weirs. Ireland’s shortest canal was built to allow the eel-boats of Anthony Mackey’s fleet to reach the trains at Banagher.

But the European eel is a “critically endangered species” and all eel fishing has been banned in Ireland. As far as I know, though, the Lough Neagh fishery, in Northern Ireland, continues.

The Electricity Supply Board (ESB) is in charge of the eel fishery on the River Shannon. It has nets and a storage unit (packing station) at Killaloe and, until recently, it also had nets at Clonlara on the headrace supplying the power station at Ardnacrusha; the Clonlara nets have just been removed. This page is about the Clonlara and Killaloe operations, but includes a look at an eel survey conducted for the ESB in 2008, before eel fishing was banned in Ireland. The aim now is to make it easy for eels to reach the sea to reproduce, and that sometimes involves “trap and transport”: catching the eels and moving them past obstacles, whether on their way to the sea or, for the young glass eels, on their way upriver.

The photos on this page are a tribute to what was an important activity on the Shannon. I hope that the European eel stocks can recover.