Figure 7. --Bank cutting 

 of Porcupine River 

 caused by flooding 

 waters. The dis- 

 lodged white spruce 

 end up down the 

 river on gravel bars 

 serving as breeding 

 material for Ips 

 interpunctus . 



Figure 8. --Bank on far 

 side of Sheenjek 

 River undercut by 

 high water. Tree in 

 foreground brought 

 down from up river 

 is infested by Ips 

 interpunctus. 



When combined, the volume and acreage figures amount to a very substantial 

 loss of 268, 600 ,000 board feet or over one-quarter of a billion board feet 

 of what was once a usable forest resource. Additional losses on a few 

 small areas have been salvaged as pulpwood. The vast majority of the loss 

 volume has now deteriorated beyond the point of salvage. 



•12- 



