grow in peace there. No big fish are 
around to harm them, and they get plenty 
to eat. When the young salmon are 
big enough to take care of themselves, 
they are carried to the rivers and set 
free. In this way enough new fish are 
put back every year to take the place of 
those that are caught. 
The Government had another problem 
to solve. In some salmon rivers men 
had built dams over which the fish could 
not climb. In other streams were falls 
or rapids in which salmon were torn and 
bruised, or even killed. Some way had 
to be found for the fish to get past these 
places, or most of them would never get 
to the spawning grounds. 
One way was to build fish elevators 
in streams at one side of the dams. 
Salmon coming upstream swim into the 
fish elevator just as people walk into an 
elevator. As the gate closes, the elevator 
begins to fill with water, and the floor 
47 
