American Fisheries Society. 235 
them above the dam and more than 1,000 were so carried 
up. This, however, was discontinued at the end of the spawn- 
ing work of the station. To help fish left on the stream, or 
which might reach it later, the present fishway was devised. 
This was intended to help them in two ways. First, by provid- 
ing a passage through which they might go to the lake if they 
chose and secondly, by securing a constant, even if small, stream 
in which they might live though all the gates in the dam should 
be closed. To provide such a stream is necessary because some 
fish, even if only the very young, will elect to stay in the stream. 
The fishway as built consists of a straight flume about seven feet 
wide and fifty feet long, divided into eighteen pools by partitions 
reaching from side to side and from top to bottom. In these 
partitions openings eight inches high and two feet long are made 
at a height of ten inches above the bottom. At the lower end the 
opening is at the bottom and also at the upper end, and, since 
the bottom of the flume is nearly level in its upper part, severed 
of the upper openings are nearer to the bottom than ten inches. 
This arrangement at the upper end is necessary because at low 
water in the lake only a few inches in depth enters the fishway 
and all openings in the partitions must be low enough to allow 
this to pass. It is for this reason too that the openings are raised 
above the bottom in the steeper part of the fishway and are 
placed on alternate sides of the flume, since, when so little water 
enters, the pools are not filled and the fishway becomes of the 
former shallow pool sort. 
Four of the pools are above the line of the gates in the dam, 
i. e., extend up into the lake and their sides, of course, reach to 
the whole height of the dam. Just below the gate the sides of 
the flume are some two feet lower than above and thence slope 
down to the level of a full stream at the lower end. As thus 
built the pools fill to such a height that the total fall from lake 
to stream is divided into as many steps as there are partitions. 
The force of water at any opening is therefore not too great for 
fish to swin against and the water in all the pools is unbroken 
and of sufficient depth to provide resting places for fish while in 
them. Such resting places they will find either at the side or 
above or below the openings, since eddies or nearly still water 
are to be found at all such points. Apparently fish will find no 
