130 Roosevelt Wild Life Bulletin 



outlet. Where the outlet stream leaves the lake there is a new clam 

 117 feet long and 2 feet, 6 inches high. The ground bordering 

 the outlet is low and the dam has caused a flooding of probably two 

 or three acres of timber, mostly fair-sized spruce, which is dying. 

 Figure 10 shows the dam at the outlet. 



Lily-pad Pond (Twitchell Lake district) is surrounded by a 

 belt of dead timber about 40 to 60 feet wide, chiefly medium-sized 

 spruce. This pond and a small one to the southwest of it, originally 

 separate, have now been made into one pond as a result of beaver 

 flows. At the outlet of this greater pond is a dam 85 feet long and 

 3 feet, 9 inches high. The water above it at the time of my visit 

 was 8 inches below the crest of the dam which had been torn open 

 at one end by men, and had not yet been repaired by the beavers. 

 The condition of the neighboring Little Birch Pond is similar. 



At the outlet of South Pond is a dam 90 feet long and 3 feet 

 high; but the banks are steeper here and the amount of dead wood 

 as a consequence is negligible in quantity. 



A beaver pond formed at the junction of what is known locally 

 as ''Jack Creek" and "Sunshine Creek" is shown in figure 11. 



The greatest damage to timber in any one patch in this district 

 is about Oswego Pond (figure 12), especially along the small creek 

 entering it from the west. Here the flooded area extends for half 

 or three-quarters of a mile upstream from the pond. On the inlet 

 creek from the northeast seven dams were found, one of which was 

 about 100 feet long and 3 feet high. Towards the upper limits 

 of this creek the banks are higher and no serious damage is likely 

 to occur. 



In both the Big Moose Lake and the Twitchell Lake districts 

 about all the damage to timber that can result from beaver dams 

 has already been accomplished. This statement is supported also 

 by the expressions of the District Ranger and local inhabitants. 



3. Beaver River Region. One of the smaller lakes of this region 

 is Loon Lake. Across the outlet on its northeast side is a dam 

 about 60 feet long and 2 feet, 6 inches high. As a result of this 

 dam there are patches, covering perhaps three or four acres, of 

 recently drowned spruce and cedar on the northwest and northeast 

 shores. The southwest shore at the inlet, contains a larger patch, 

 my estimate being In the neighborhood of seven or eight acres. 



A small creek known locally as the "North Branch" enters the 



