Tag Archives: Lough Allen

The current at Killaloe

I have been known to complain about the absence [on the interweb] of information about the state of the Shannon downstream of Banagher and Meelick.

Waterways Ireland

On the Waterways Ireland website, on the “About Us” menu, there’s a “Water Levels” option which takes you to this OTT Hydromet page. Perhaps my security settings are too high (or too eccentric), but at the top of the page all I see is

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At the bottom I read

Click here to obtain list of todays 9am Values. Please Note – Levels are recorded in meters to MSL Malin Head.

There is also a disclaimer.

The link goes to this page where the locations of various gauges are categorised by waterway. The furthest south [on the Shannon] I can find is …

Meelick Weir Gauge SS_MEELICK Water level 0001 32.62m 2018-07-07 07:30:00 5400

… from which I deduce that the water level at Meelick Weir is 32.62 metres above mean sea level at Malin Head. From that, of course, I can deduce the depth of the water at Meelick, or I could if I knew how far the bed of the river was above MSL Malin Head, and by charting the daily returns I could see whether the level was increasing or decreasing.

OPW

Alternatively, I could use the OPW’s gauge at Banagher, only a little way upstream, which shows me the depth, the change over 35 days and the level in relation to various percentiles of previous levels. That is a lot easier to read and a lot more useful: although a measure of flow would be more useful still, I can assume that a high level will be accompanied by a faster flow.

ESB

I have recently discovered that the ESB has a page with (admittedly for a small number of sites) information in a more user-friendly format than either WI or the OPW. To find it from the home page, select “Our Businesses”, then “Generation & Energy Trading”, then “Hydrometric Information”, then “River Shannon”, then “Beware of the leopard”. Alternatively, try www.esbhydro.ie/shannon for a list of PDFs.

Either way, the files available include

  • a hydrometric forecast for the Shannon
  • one-year charts showing levels at each of five locations: Bellantra sluices, Lough Ree; Thatch, Lough Ree; Athlone Weir downstream; Portumna Bridge; Pier Head, Killaloe
  • even more useful for anyone going near Killaloe Bridge, the total flow [in cubic metres per second] at Parteen Villa Weir and at Ardnacrusha.

Here, in flagrant breach of the ESB’s copyright, is the chart for Parteen Villa Weir:

The flow at Parteen Villa Weir

The flow has been pretty well flat, at 0, for some time. The Parteen and Ardnacrusha charts have accompanying tables giving the figures for the last 30 days; here are those for Ardnacrusha:

The flow at Ardnacrusha

Each of Ardnacrusha’s four turbines uses about 100 cubic metres per second [cumec]. The flow through Parteen Villa Weir is divided between the old course of the Shannon [which must get 10 cumec] and the new channel through Ardnacrusha. The combined flow through Parteen has been 11 cumec for the past week, and Ardnacrusha has been getting nothing (except a tiny amount on 3 July). That explains why the level of water at Castleconnell, on the old course, is slightly higher than normal summer levels (11 rather than 10 cumec).

And with no water going through Ardnacrusha, the level of Lough Derg is normal (see the chart for Killaloe) and there is no strong current at Killaloe.

Note, by the way, that the levels shown by the ESB are referenced to the older Poolbeg ordnance datum, not the Malin Head used since 1970: “Poolbeg OD was about 2.7 metres lower than Malin OD.”

Other sites?

If, Gentle Reader, you know of any other accessible web pages with user-friendly information on flows or depths on the waterways, do please leave a Comment below.

 

 

Spencer Harbour

Excellent article about the Lough Allen Clay Company on the Dromahair Heritage website, though the schoolboy speculation on the naming of the harbour is not, I think, to be relied upon: the fifth Earl Spencer, twice Lord Lieutenant of Ireland, is I think the source of the name.

h/t COM for the link

Draining the Shannon

Lough Allen to Sligo (OSI 25″ ~1900)

In looking at the map of Ireland, it has appeared to me that it may be found of advantage to prevent the waters of Lough Allen from flowing into the Shannon, and to cut a channel in a north-westerly direction, along which they may run into Sligo Bay. By this disposition of the waters of Lough Allen, not only will the channel of the Shannon be relieved from the superabundant water which now flows along during the rainy season, but they will act very beneficially in scouring out the harbour of Sligo. The Shannon might likewise be made available to the supply of power to several valuable mills to be erected on its course.

The Report of Mr George Stephenson, Civil Engineer, London, 9th July, 1831, to the Committee appointed to inquire into the practicability of improving the navigation of the Shannon, and for draining the lands in the vicinage

The Traveller’s Map of the River Shannon (1830)

The Traveller’s Map of the River Shannon. Arranged as a Guide to its Lakes and the Several Towns, Gentlemens’ Seats, Ancient Castles, Ruins, Mines, Quarries, Trading Stations, and General Scenery on Its Banks, Source in Lough Allen to the Sea, Leitrim, Longford, Roscommon, Westmeath, King’s County, Tipperary, Galway, Limerick, Kerry and Clare, Accurately Taken from the Survey made by J. Grantham, by order of the Irish Government, under the direction of the late J. Rennie. Printed and published for the Irish Inland Steam Navigation Company, 1830.

Oblong folio, 15 numbered maps printed in black with river and water features coloured in light blue. Original quarter calf green cloth boards, russet title to centre of upper boards, stamped in gilt with gilt fillet boarder. Repair to rear of plate 15, otherwise all maps in very good to fine condition.

Contents: 1. Map of Ireland, 2. Index Map. Lough Derg to the sea, 3. Index Map. Lough Derg to Lough Allen., 4. Kilrush to Tarbert and Foynes Island, 5. Foynes Island to Grass Island, 6. Grass Island to Limerick and O’Brien’s Bridge. 7. O’Briens Bridge to Killaloe and Dromineer. 8. Dromineer to Portumna and Redwood Castle. 9. Redwood Castle to Banagher, and Seven [Churches (Clonmacnoise)], 10. Seven Churches to Athlone and Lough Ree, 11. Lough Ree to Lough Forbes. 12 Lough Forbes to near Leitrim. 13. Leitrim to Head of Lough Allen. 14. map of Limerick, 15. Map of Killaloe.

Map 1 shows Ireland and its waterways at scale of 1″ equals 20 miles, Maps 2 and 3 show the key for 4-13, with table of falls of water along the route on former and table of distances on latter; Maps 4-14 each have a short descriptive panel; Map 14 shows Limerick from the north of King’s Island to the New Barrack in the south with key Map 15 from the town at left to Beal Boru at right.

Yours for only €1800 at Ulysses Rare Books in Dublin.

Lough Allen to Limerick 1786

The hopes of a gentleman of Limerick ….

The Slieve Anierin Canal

Carthach O’Maonaigh very kindly drew my attention to an item in The Schools’ Collection, “a collection of folklore compiled by schoolchildren in Ireland in the 1930s” made available on Dúchas.ie. The item in question, which has been scanned and transcribed, is what Patrick McLoughlin, aged 59, told Mary Josephine reynolds of Cormongan, Co Leitrim; it can be seen here but Dr Críostóir Mac Cárthaigh, Interim Director of the National Folklore Collection at UCD, has very kindly given me permission to reproduce the text here.

Slieve Anierin Canal and Cornashamsoge Furnace

About the year 1650, there was a furnace for smelting Iron ore in the townland of Cornashamsogue, situated on the east side of Lough Allen. The ore had to be conveyed to the furnace for a distance of about 3 miles.

For this purpose a canal was made. The canal ran by the foot of the mountain. Several rivers flow westward from the mountain into Lough Allen. The largest of these is the Stoney river, a river that becomes a roaring torrent in times of heavy rain, often overflowing its banks, and causing great destruction, to lands, crops and houses.

At the time mentioned above, about the year 1650, the water of the Stoney river was diverted into the canal. The canal then was fed principally by this river, and in a lesser degree by the other smaller rivers that ran in the same direction. All the rivers ran at right angles to the canal.

The water also supplied the power that worked the furnace. The site of the furnace can still be pointed out, and the field in which it is situated has got the name of the Furnace Meadow. This furnace was in operation about the same time as, and may have some connection with the furnace, or furnaces, at Drumshanbo, which would be about 3 miles away.

Iron ore was conveyed to the Drumshanbo furnaces by boat, on Lough Allen. The sources of supply, were, the Slieven an Iern, Ballinaglera, Arigna mountains, all situated around Lough Allen. It is thought that the town of Drumshanbo had its origin in these industries. As to the Slieve an Iern canal, there are but very meagre traces of it at the present time.

A canal built in 1650 would be a very early canal and I would be grateful for any information anyone can provide about it; please leave a Comment below if you can help. I can’t see any trace of either canal or furnace on the OSI 6″ and 25″ maps but I may not be looking for the right shapes.

 

 

ESB water discharge info

Here is the ESB’s Notifications page, with info on the rate of discharge from its hydroelectric dams and weirs. Today (14 December 2015) Parteen Villa Weir is discharging 440 cumecs (cubic metres per second or, roughly, ton[ne]s per second down the original course of the Shannon. That’s 44 times the 10 cumec usually discharged and more than replaces the 400 cumec diverted through the headrace to the Ardnacrusha power station. The Shannon is therefore running at its pre-Ardnacrusha levels and the Falls of Doonass have regained their power.

Of course if Ardnacrusha didn’t exist, its 400 cumec would be coming down the original course of the Shannon on top of the 440 cumec already there, which would make for interesting levels of flooding.

That ESB page has a link to this infographic, which shows the sort of information I was trying to get across here. I usually start from Leitrim [village]; the ESB starts slightly further upstream at Lough Allen. Note that the Shannon’s few locks are concentrated upstream of Lough Ree: between them and Killaloe are only two locks, at Athlone and Meelick, so the river’s fall is very slight.

Update 2018: the ESB has a new page with lots of interesting information here.

News from the Windsor and Eton Express

A memorial to the lord lieutenant from the gentry and landed proprietors of Sligo, Leitrim, Fermanagh, and Cavan, lies in Enniskillen for signatures. It prays that a canal may be formed which will connect Lough Earne [sic] with Lough Allen, and that again with Lough Gill, which is navigable to Sligo. This, with the canal already sanctioned between Lough Erne and Neagh, will open a communication across the kingdom, from Sligo to the ports of Newry and Belfast. In a commercial point of view, this undertaking is of the greatest importance to Ireland.

Windsor and Eton Express Saturday 28 May 1825

Blueways and traffic

I wonder whether it would be wise to issue some guidance to masters of larger vessels about (a) the likelihood of meeting numbers of canoeists, kayakers, stand-up paddleboarders (SUPpers) and others on particular stretches of water and (b) what to do on meeting them. Guidance to operators of the smaller craft might be useful too. I’m thinking in particular of the restricted visibility on parts of the Camlin and the prospect of encountering a fleet of SUPpers on a tight bend.

The Camlin and the Lough Allen Canal in effect enforce their own speed limits, but I don’t know whether there is any limit on the Shannon between Tarmonbarry and Lough Forbes. If there isn’t, perhaps a limit should be imposed to protect those on small craft.

 

Blueways

Longford Tourism and Waterways Ireland are holding an information meeting about Blueways in Longford tomorrow. It’s in the Backstage Theatre on Tuesday 24 March 2015 at 7.00pm. The blurb reads:

Are you an activity provider, accommodation provider, walker, boater, canoeist, outdoor enthusiasts?

Longford Tourism, in conjunction with Waterways Ireland is delighted to invite you to a Public Information Meeting regarding exciting new recreation and tourism products called Blueways.

Blueways are a series of innovative, safe and easy to use water and land-based trails. These provide for guided and unguided paddling, walking and cycling. Visitors can opt to paddle along the Shannon Blueway, on a 10km looped trail along the Camlin and Shannon Rivers, while the Royal Blueway provides 16km of off road walking and cycling from Cloondara to Longford Town.

To celebrate this exciting trails development, Longford Tourism will host the inaugural Longford Blueways Festival in April. So, come along and hear how you can get involved. All are welcome to attend.

I wish them well and I hope this initiative works. I think that the Blueways are more likely to be successful than any attempted revival of the cruiser-hire business (although I’d like that to work too). However, I would like to learn more about the Blueways business model (if that’s the right term). Who has to invest how much and who gets what returns? Clearly, Waterways Ireland spends money up front, but far less (I presume) than (say) canal restoration would require. But are there viable businesses, or at least viable supplementary income-generating activities, for small local service providers? How do they reach overseas markets? Or is the focus on domestic markets?

One point that strikes me is that Blueways allow for more interaction between tourists and locals: something that used to be a strength of the Irish tourism offering (I’m trying to keep up with modern marketing jargon here) until we decided we were too busy being rich and successful to waste time chatting to tourists (or, if you prefer, providing unpaid support services to the tourism industry). Indeed we felt that even paid employment in tourist enterprises was beneath us: we could get nice people from overseas to do that work instead. Did we, I wonder, hollow out Ireland, removing the Irishness, the distinctiveness (whatever it was) from the tourist experience?

If so, the Blueways’ opportunities for interaction with small-scale and local enterprises might put them back again. There are difficulties in making a living from small-scale operations, but there are benefits too. And the Blueways might tap into other local, small-scale developments: for instance, the recent startling growth in the number of craft breweries. The Lough Allen and Longford Blueways each have a local brewery — St Mel’s in Longford and Carrig in Drumshanbo — and the products of at least one other brewery, Co Roscommon’s Black Donkey, are available on the North Shannon. Maybe, now that KMcG is back, “Places to find good beer” might be added to places to stay, eat and go on the Blueways website.

A Blueway is defined there as

a recreational water activity trail that is developed for use by non-motorised water activity enthusiasts. It is defined by trail heads, put in and take out points and readily available trail information. Blueways can be developed on canals, rivers, lakes or along the coast and can incorporate other associated land base​d trails adjacent to the water trail.

So what about a Blueway for Lough Oughter, with sailing, canoeing and camping?

[h/t Carthach O’Maonaigh]