8 



Appendices to Sixteenth Annual Report 



negotiations which are going on between them and the Commissioners 

 regarding the new works which are about to be constructed. 



By the 16th Section of the Glasgow Corporation Waterworks Act, 

 1885 (48 and 49 Vic. c. 136) the Commissioners, under that Act, are 

 entitled to raise the water in Loch Katrine five feet above the maximwm 

 height specified in the 55th Section of the Act of 1855 (18 and 19 Vic. 

 c. 118), and, by the 17th Section of the former Act, to take from the 

 loch 110,000,000 gallons of water per diem, including in that 

 quantity the 50,000,000 gallons which they are authorised to take by 

 the 57th Section of the latter Act. The right to raise and take the 

 said water is subject, however, to the qualification that not less than 

 800,000 cubic feet of water are discharged daily from Loch Katrine 

 into the Achray Water, and 6,720,000 cubic feet of water from Loch 

 Vennachar into the river Teith; while, in the construction of the 

 embankment for raising the water in Loch Katrine, provision must be 

 made to allow fish to pass freely into or from the loch. 



Until last year the powers conferred by the Act of 1885 had not 

 been exercised, but since then a greater quantity of water has been 

 taken than was authorised under the earlier Act, and it has become 

 necessary to construct the works authorised by the later Act. It 

 would seem that three points should be kept in view in their 

 construction, viz.: — (1) That provision be made to ensure that the 

 requisite compensation water be made to flow from Loch Katrine into 

 the Achray Water, and from Loch Vennachar into the river Teith; (2) 

 that proper water gauges be erected, in order that the amount of water 

 sent down may be checked ; and (3) that the dam shall be so constructed 

 as to allow fish to pass freely to and from the loch in terms of the 27th 

 Section of the Act of 1885. 



With regard to the regulation of the compensation water, it would 

 seem to me that greater accuracy would be insured, and much incon- 

 venience obviated, if the water gauges were made self-recording, as they 

 might be made without any great difficulty. The raising of the level 

 of Loch Katrine will render the existing salmon ladders altogether 

 useless, and in order to allow fish to pass freely into and from the loch it 

 would seem to me that the old channel should be made use of, and sub- 

 sidiary dams erected across it, as has been done in the case of the old 

 channel leading from Loch Vennachar. But, if this is done, it will be 

 necessary to send the compensation water down the old channel instead 

 of through the new cut as is done at present. Otherwise, fish will be 

 unable to ascend " at all times, or during such peiiod as water shall be 

 " discharged from Loch Katrine," in terms of the 27th sec. of the Act of 

 1885. But since the water in Loch Katrine may be lowered twelve feet 

 below its maximum height, and the outlet for the compensation water 

 must be placed below the lowest point to which the loch may be lowered, 

 it is evident that the compensation water cannot be made to flow over 

 the subsidiary dams in the ordinary manner ; and I am disposed to 

 think, therefore, that this is a case in which Cail's system of fish-pass 

 might with advantage be adopted. 



From Dunblane I proceeded to Kirtlebridge, in Dumfriesshire, 

 stopping at Stirling on my way for the purpose of conferring with the 

 Clerk of the District Board of the river Forth, of which the river 

 Teith is a tiibutary, regarding the erection of a suitable fish-pass at the 

 outlet to Loch Katrine, and the other points w^hich should be kept in 

 view during the construction of the new works. 

 Kirtle. 2d>t)i July I visited the cauls on the river Kirtle, being 



accompanied on my inspection by General Graham of Wyseby and Mr. 

 Andrew Smith, factor to Mr. J. E. Johnson-Ferguson, M.P. There are 



