Looking out the window

According to the Met Éireann inland lakes forecast [are there outland lakes?], Lough Derg is currently experiencing southerly winds of Force 3 or 4.

According to Windguru, it’s F4 but with gusts to F6 or F7. XCWeather agreed on F4 gusting F6; Windy says F4 gusting F7.

Messrs Windguru, XCWeather and Windy seem to be closer to reality than Met Éireann. It may be forecasting the base or average wind speed, but anyone going out there now, based on a forecast of F4, is going to be seriously discommoded.

 

The port of Limerick

Limerick was formerly an important place for exporting grain and provisions. At that time a fine fleet of schooners, principally employed in the trade to London, was owned there; and some large brigs, barques, and ships, engaged in the passenger and timber trade with North America, hailed from the port. But the maritime trade has declined greatly of late years, and the number of vessels has become proportionably reduced. At present the shipping consists of a few colliers and timber vessels, and a fleet of five screw steamers. The latter monopolize so much of the trade between the city and the English ports as the railways do not absorb. A number of foreign vessels, principally with grain from the Mediterranean, arrive at the port, and the seamen that are met with here are for the most part Italians, French, and Austrians. There is now a large floating dock at Limerick with gates 75 feet wide. A Sailors’ Home was recently erected here, but it has never been opened, as there are at present hardly any sailors to be found at the port, except a few such foreigners as have been just described.

“Visits to the Sea Coasts” in The Shipwrecked Mariner Vol VIII No XXIX January 1861

Drought

In England the trans-Pennine waterways are being closed (for through navigation) because of a shortage of water. The worst affected is the Leeds and Liverpool but the Huddersfield Narrow and the Rochdale will also be closed to through navigation. There are also restrictions on the Peak Forest and Macclesfield canals.

Canal Boats for sale

The Directors of the Grand Canal Company hereby give notice that they will SELL, to such parties as may require them, NINE SWIFT PASSAGE BOATS, and TWO HEAVY NIGHT PASSAGE BOATS, several of which are in perfect repair, and of the following dimensions, viz:—

FLY BOATS

Average length, from Stem to Stern, 60 feet, and average breadth of beam, 6 feet 6 inches.

NIGHT BOATS

Average length 60 feet, and breadth of beam, 7 feet 9 inches.

Applications from parties desirous of purchasing same to be addressed to the Secretary.

By Order, JOHN M’MULLEN, Sec, Grand Canal House, William-street,
11th February, 1848

Dublin Evening Mail 25 February 1848

Liveaboards

I do hope that Waterways Ireland finds inspiration in this story from the Grauniad, wherein we learn that the Canal and River Trust, which manages many waterways in England and Wales, is able to charge over £12000 for city-centre moorings.

Assistance to canals in Ireland

The assistance given to canals belonging to companies in Ireland in the last and commencement of the present century was chiefly in the form of loans of public money or by grants from special or general taxes; but we have been unable to obtain from the records of inland navigation in Ireland a complete account of the public loans which were made for such purpose.

Report of the Commissioners appointed to inspect the accounts and examine the works of Railways in Ireland, made to the Lords Commissioners of Her Majesty’s Treasury HMSO, London 1868

How true those words are even today.

I would be grateful if anyone could tell me the full cost of the restoration of the Royal Canal and the Ballinamore & Ballyconnell Canal, now the Shannon–Erne Waterway.

 

Barges, eh?

Must be a good idea if it involves barges

… or maybe not.

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

Alternate HTML content should be placed here. This content requires the Adobe Flash Player. Get Flash

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.

 

 

Ardnacrusha tours 2018

Tours of the Ardnacrusha power station are available again this year; info here.

An Athlone nitwit

Councillor Frankie Keena “is asking for a feasibility study on reopening the Athlone canal to navigation to be carried out. Cllr Frankie Keena will table a motion to this effect at Monday’s meeting of the Athlone Municipal District of Westmeath County Council.”

I presume that the point of the proposal is to get Cllr Keena’s photograph in the local papers. Goodness knows why they fall for that sort of thing.