I move:—
That in the opinion of the Seanad a Special Commission should be appointed:
To consider the documents entitled "The Shannon Scheme— Siemens-Schuckert and The Shannon Scheme — Report of the Experts appointed by the Government," laid on the Table of the Seanad on the 25th March;
To enquire into the present consumption of electricity in the Free State, and the rate at which such consumption is likely to increase in the future; and
To report to the Oireachtas whether in its judgement it is advisable that a scheme of such magnitude as the scheme entitled the Shannon Scheme should be undertaken by the State at the present moment, having regard to the financial and economic resources of the State.
That in the opinion of the Seanad such Special Commission should be composed of persons appointed by competent bodies, such as the Council of the Institution of Civil Engineers of Ireland, the Council of the Irish Centre of the Institution of Electrical Engineers, the Associated Chambers of Commerce, and the Irish Farmers' Union.
My reason for proposing this resolution is that on Wednesday last these papers were submitted to the Seanad. It appears to me of very great importance that the Seanad should understand thoroughly the meaning of the proposals contained in those reports. It will be in the recollection of the Seanad that early in March of last year the Government divulged their contract with Messrs. Siemens-Schuckert and on the 7th March laid on the Table of the House what is called the White Paper. No particular notice was taken of that paper. No discussion arose out of it, and it has been said, as no discussion took place in connection with it, that the House assented to it. I am particularly anxious that in the case of the present report that should not recur, but that every member should take advantage of his right and take advantage of those two reports, and, if possible, study them, or, at any rate, get the real gist of them. It would be impossible for a layman to grasp much of the information which is of a technical character. It has been suggested that this is an entirely new scheme. I am particularly anxious that I should not get into controversial points this evening, for my only object in bringing this motion before the House is that those reports shall receive careful consideration and critical investigation by men belonging to this country who are capable of doing so. That is my one object in bringing forward this motion. Naturally it will be said, as it has been said, that Sir John Griffith is so associated with the Liffey that he cannot see anything else. I wish to try and make it clear that I am perfectly desirous that the Shannon should be utilised as one of the great sources of power for Ireland.
I differ completely from many of those suggestions in those reports. I had written on the subject some months ago in the form of notes on the speech made by the Minister, which was a carefully-compiled — I cannot say argument, but — statement of the report which he has in hands, the report of Messrs. Siemens-Schuckert. In those notes I endeavoured to point out as clearly as I could the points in which my opinion as an engineer was at variance with some of the proposals made. I deprecated, at the beginning of those notes, discussing the point without having the whole documents before me, but, in consideration of the very full nature of the information given by the Minister, I felt it my duty, as far as lay in my power, to let Senators and others know my views. It appears to me that the Siemens-Schuckert proposals involve the country in serious risks — firstly, engineering risks; secondly, agricultural risks; and, thirdly, financial risks. The Shannon, as we all know, is our greatest river. It is the greatest river in the British Isles, one hundred and sixty miles in length in its main course. It covers in its catchment basin one-eighth of the whole country. Its flow is extraordinarily variable, from 700 feet per second to 32,000. These are the figures, as far as my memory serves me, and they are extremes in the ratio of one to 46. For electrical uses this variation is a matter of great difficulty, and all our efforts as hydro-electric engineers are to try and conserve the water by storage so that we may get a uniform supply.
Just about this time six years I was Chairman of the Water-Power Resources Sub-Committee of Ireland, and the Shannon problem occupied a great deal of our time. We came to the conclusion that a certain amount of power could be obtained without interfering with the land. That was the great principle; we must not interfere with the agricultural interests of the valley of the Shannon. The result was that we could only get something like forty-five per cent. of mean discharge of this great river available for power purposes.
If you approach the problem from the point of view of power, the more storage you can get the better. The way that has been adopted by Messrs. Siemens-Schuckert has been to surround these great lakes, Lough Derg, Lough Ree and Lough Allen, representing something like 65,000 acres in area, by embanking them and raising the level of the water by troughs and basins to increase the storage capacity. In the case of Lough Derg the water level is to be raised something like seven feet, in Lough Ree four feet, and in Lough Allen about ten feet. With that it is hoped to get a very large supply of water for power purposes. Anyone who has worked at these plans will readily understand how one thing after another conflicts with the objects in view. If one was seeking the drainage of the country the thing to do is to run down the river and get the water away as fast as possible. Once you embark on navigation you have to keep up the water. When you begin to discuss fisheries the problem is to leave things alone. The item introduced lately is power. That seeks to utilise the greatest possible volume of water available, and the temptation in seeking so to use the waters of the Shannon is naturally to increase storage. The method adopted by Messrs. Siemens-Schuckert is the natural one. I do not say anyone facing the problem at first, with the intention of only using the river for power purposes, would embank the lakes, embank the rivers, and raise the water level. You then come to a difficulty as regards the drainage of the lands outside these banks. In this case the introduction of electric power has enabled them to provide something like 35 pumping stations. The level of the embankments is variously estimated from 150 to 200 miles—probably 150 miles is nearer the mark. There you have a gigantic work, and I may say, at once, a tremendous risk in the scheme. All that embankment must be water-tight, if the scheme is to be a success. By raising the level of Lough Derg over the ordinary measure they are able to ensure having 100 feet of a fall at their power station. A curious construction occurs at Killaloe. The great head-race or canal, some 6½ miles long, is to start from the neighbourhood of O'Brien's Bridge. Lough Derg is extended down the river to O'Brien's Bridge between two embankments of about 10 to 12 miles in length, counting the two sides. To my mind that is a source of extraordinary vulnerability and of great risk in connection with this scheme.
In passing, I may say that the directors and the experts laid great emphasis on carrying out the work by one power station having a long canal or head-race. Our Water Power Resources Committee investigated the problem very closely. We had plans made, and estimates, as regards a single station, and we came to the conclusion that it was a wiser step, and a safer one, to treat the river and the power stations between Killaloe and Limerick in the manner that the French Government have adopted very widely of late, that is by steps. It increases the number of your stations and it is the first reason that gives the impression that it is uneconomic. In the case of the Shannon, it has been carefully worked out that it is a perfect proposition to work by steps rather than by a single fall. That is a temptation to me to wander into controversy. It is one of the questions that will naturally come before the Commission suggested by the resolution. The impression made in my mind by a study of the two reports before the Seanad is that the Shannon problem has been viewed simply from the standpoint of electrical development. The river presents the most complex problem of any river in Ireland, and the engineer is between conflicting interests. It is easy, obviously, to utilise the river in the interests of one or other of these particular requirements.
The Siemens-Schuckert scheme is designed purely in the interest of developing the maximum amount of electrical energy obtainable from the river regardless of other interests. Agriculture is Ireland's greatest industry. It should take precedence and be absolutely safeguarded. So far from this being the case in the Shannon valley, it becomes absolutely dependent on the success or failure of this electrical project. A failure of the one electric power station, whether through accident or crime, would leave the whole country destitute of electrical power. The failure of any part of the embankment between Killaloe and O'Brien's Bridge would allow the whole of the water in Lough Derg above the level of the lake outlet at Killaloe to rush down the river channel to Limerick and overwhelm that city with a disaster greater in magnitude probably than any on record of a burst dam. This would be followed by a complete stoppage of the supply of electricity throughout the Free State. The electric pumps for the drainage of land outside the embankment around the lakes would be unable to work. This would be followed by the flooding of these lands and the conversion of this area into a gigantic lake without outlet until the water rose to the level of the embankments. When it is understood that this disaster could be brought about by a couple of hours' work of a gang of criminals, it is difficult to believe that a responsible Government would listen to such a proposal. The financial risk is that for many years there would not be a sufficient market demand for current to pay for the outlay. The estimate of the demand reaching a hundred and fifty millions of units in a few years is, I believe, entirely misleading. It would mean a more rapid growth than has occurred in any industrial country like Switzerland. For these reasons I believe the present proposals to be a mistake, needing the most careful examination by the Seanad and the Dáil, and I would ask the Seanad to adopt the resolution which I now propose.