56 American Fisheries Society 



We made this fishway of cement, to run up as far as the outlet. 

 We dug down fifteen feet deep and brought the fishway around under- 

 ground. The part that is underground is built of cement, but where 

 it comes out it is of steel structure, which it is possible to remove 

 during that part of the year when the fish are not in the stream. 

 We found that catfish were going up right along. It was necessary 

 to have a door made which could be locked to keep the fish from going 

 up except when we had control, in order to keep poachers oflF. 



Mr. a. H. Dinsmore, of Vermont: One of the most serious prob- 

 lems any one has is in connection with the salmon fisheries of the 

 Pacific Coast. I want to ask Professor Prince if his plan is adapt- 

 able to the conditions there. Does he plan to put in a temporary 

 wire barrier to stand when the fish are running? In the spawning 

 of salmon on the Pacific Coast they always crowd at the flood periods. 



Prof. Prince: I think it will work there. I claim that no fish pass 

 erected for the flood period is good in low water. This pass would 

 be erected before the flood season and would be adapted to those con- 

 ditions. One of its chief points is that it can be taken down. 



Mr. Seymour Bower, of Michigan: My experience in Michigan is 

 very much the same. We have a law which requires the provision of 

 fishways, but as far as I know they are an absolute failure. It seems 

 to me that one remarkable feature of Professor Prince's fishway is 

 the leader to guide the fish to the mouth, but I would like to know 

 what material he uses, and how he is going to prevent the leaders 

 from being carried away. In our state the question of testing fish- 

 ways is going to be a very important one owing to the fact that rain- 

 bow trout are multiplying and eventually will be a very important 

 commercial fish in the Great Lakes. In six streams that flow into 

 Lake Michigan there were half a million to a million pounds of rain- 

 bow trout headed upstream toward the dams, and the number seems 

 to be increasing rapidly, so the necessity for adequate fishways is 

 of very great importance. 



Prof. Prince: The full description of this fish pass, with draw- 

 ings, is being printed, and I propose to send every one here a copy. 

 The leader is one of the most important features. Its permanence 

 is of no importance. It is made of chicken wire, and if carried away 

 can easily be replaced. 



Mr. W. C. Adams, of Massachusetts: The Indians in the West have 

 shown us how to lead trout by building a rock wall two to three feet 

 wide across the stream. The fish do not rise over this wall, but are 

 led right to the fishway. We have one dam thirty feet high with a 

 fishway consisting of a series of wooden boxes six feet long, four feet 

 wide and four feet high. In this fishway I have seen twenty tons 

 of trout waiting their turn to go over and running from box to box. 

 We have taken out at this place as high as 5,000 spawn trout yielding 

 twelve to fifteen million eggs. A wire leader would break down here 

 with debris, for the fish go up only in the flood season; but with the 

 rock wall under water, which the Indians showed us how to build, the 

 debris passes over while the fish are led to the way. We have had 

 such success with this method that we consider our problem solved. 



President: The experience of Fish Commissioners is that the auto- 

 matic fish pass is a failure. Perhaps the fish could be locked in dams 

 like a canal pass, with very long locks which could be opened and 

 closed as often as necessary. 



