7j2 



A2}j)endices to Side ntli Amiual Brport 



"afibiding a free passjige for a.scending fisli at all tiiues when there is 

 " water enough in the river to supply the ladder.'' From the decision 

 given in the case of Myers r. Grant, a case in which the proprietor of 

 Ci*aigo dam dyke was ordered to make sufficient provision for the free 

 jjiissiige of s;ilmon in terms of the bye-law, it would seem that in order 

 to fulfil the requirements of the liye-law a fish-ladder must be efficient 

 as afi'ording an uninteirupted passiige for s;ilmon. With regard to this 

 case 1 may mention that I am given to understand that the proprietors 

 of Ci-aigo hold that they are exonerated from all further obligation with 

 reference to the construction of the jmss, seeing that the Coui-t of 

 Session, to whom the case was ap}>ealed, found that the pa^>s should b*- 

 altered in tei-ms of the several lejx^rts made by Mr. Stevenson, civil 

 engineei-, Edinburgh, and that the altei-.itions projwsed by him were 

 given eftect to. This, howevei-, appeals to be a question of law which 

 it is not for me to decide. 



For the sake of convenience I propose to deal with ( Vaigo and 

 Moi-phie dam dykes separately. 



Craigo Dam Dyke. 



In reix)rting on the state of Craigo Dam Dyke, 1 propose, after 

 describing the form and dimensions of the dyke and fish -pass, to con- 

 .^ider, (1) in what respects, if any, the latter is not constructe<l in 

 accordance with tlie definite rules laid down in the bye-law ; and (2) 

 whether, in other respects, it aftbrds a free piss;ige for salmon; (3) to 

 summarise the conclusions arrived at on these two points : (4) to point 

 out i-emedies ; and (5) to make recommendations. 



^^Crai^'^Dai ^^^^^ ^ ^^^^^ fiom a plan and section of Cmigo dam dyke made on 



Dyke and Fish^ ^^^^ ^^^^ J^^ly 1'^^^) ^in^? civil engineer, Montrose, that the dyke 



Pass. is 42.7 feet 9 inches long, and that it raises the water in the dam to .i 



height of about seven and a half feet alx)ve the water in the jx)<>l 

 ]>elow. This height, however, varies, of course, with the rise and fall 

 of the liver. 



The length of the pass is 70| feet, and it rises in that distance 6 t3'.' 

 feet in height, or at an average giadient of one perpendicular to ten 

 and a half horizontal. But the inclination is not uniform throughout, 

 the steepest pai-t being in the upper fourteen feet, where it idses one 

 foot in every six. The foot of the pass projects about 30 feet beyond 

 the toe of the dam. 



Tlie width of the pass is four feet two inches for the first three feet 

 of its length, reckoning from the upper end, six feet six inches for the 

 following forty-one feet eight inches, and eight feet in the last twenty 

 six feet of its length. 



The upper sill of the pass is one foot nine inches below the crest of 

 the dam, but there is no means of regulating the flow of water to the 

 pass. 



The stops, of which there are eleven, are about two feet long, and 

 eight inches high. They are placed at a distance of five feet apart, 

 commencing fourteen feet from the intake and continuing to the 

 entrance, 



.'"'ts ^li de be seen, therefore, that the fish-j)ass is not constructed in 



finit?rules laid accordance with two, at leas-t, of the definite rules laid down in the bye- 

 down in live- law, viz. : — 1st, the foot of the pass projects beyond the toe of the dam. 

 law contrn- apron of stone extends throughout its whole length on either 



