removed (this area is designated Area A). The other location (Area B), in 

 and adjacent to high-water channels upstream and downstream from the highway 

 bridge, was separated from the main channel. 



At Washington Creek, two grave! removal areas were separated by approxi- 

 mately I km of undisturbed river (Figure 12). The upper (upstream) and lower 

 (downstream) gravel removal areas are designated A and B, respectively. 



At Oregon Creek the major area of disturbance was immediately upstream 

 of its confluence with Cripple River (Figure 13, Area A). The unvegetated 

 gravel bar (Area B) immediately downstream from the highway bridge was also 

 used for gravel extraction. 



At the Aufeis Creek site, the two major gravel removal areas were 

 separated by over 3 km of r i.ver channel (Figure 14). The upper and lower 

 sites are designated A and B, respectively. 



Gravel removal at the Middle Fork Koyukuk R i ver-Upstream site was 

 located in a high-water channel and on a point bar (Figure 15). The upper 

 and lower sites are designated areas A and B, respectively. 



76 



