BEAVER DAMS. 



119 



About a quarter of a mile above Lake Flora there 

 is another small lake, or more properly a pond, formed 

 by two beaver dams, about one hundred and fifty feet 

 apart, but with no pond between them. They have 

 the appearance of one dam in two lifts, although en- 

 tirely distinct; and are shown on the map as No. 1. 

 The lower one is one hundred and twenty feet long, 

 and high enough to set back water three feet deep to 

 the dam above. Its only apparent object, as in a pre- 

 vious case, is to strengthen the upper dam, by dimin- 

 ishing the pressure upon it of its pond. The latter is 

 fifty feet long and three feet in height above the water 

 below it at the centre, which, as it is three feet deep, 

 gives a total height of six feet to the structure at this 

 point. 



The highest dam, of which I have gained a knowl- 

 edge, is situated on a tributary of the Pishikeeme 

 River, in township 49, range 30, and section 34, about 

 ten miles north of the east end of Michigame Lake. 

 It is constructed in a gorge between high hills. As 

 described to me by William Bass and Paul Pine, two 

 native Ojibwa trappers, who have seen it many times, 

 it is the highest of all the dams known in the Lake 

 Superior region. It is about thirty-five feet long, 

 twelve feet in vertical height, and with a slope of in- 

 terlaced poles on its lower face upwards of twenty 

 feet in length. I have not been able to visit this re- 



