Broad-Tailed Beaver 
143 
notice were built of willow branches laid and well mixed 
with mud to hold them together. Some of them are of con- 
siderable size, one hundred feet or more long, and at times 
ten feet wide. Sometimes in a stream a series of dams may- 
be built, one below the other, and not always clear across 
the stream, but extending far enough out from the bank to 
make deep still water. 
FIG. 48. BEAVER 
From life, E. R. Warren, Photo. 
The house or lodge is a round-topped structure rising 
above the surface of the water sufficiently to allow a cavity 
above the water level for the bed, which is made of grass. 
The house has an entrance through a hole or tunnel, which 
opens at some depth below the surface. A house which 
I opened near Crested Butte was 10 feet in one dimension, 
and 8 in the other, across which the opening was made, 
the chamber or cavity w^as 2 feet wide and extended back 
4J feet. It measured 10 inches high, but no doubt the roof 
