TABLE 3-12. CONCENTRATIONS OF TRACE HETAL ASSOCIATED WITH FINE-GRAINED 

 BED MATERIAL IN THE CLARK FORK AND MAJOR TRIBUTARIES 



Location 

 River 

 Kl lometer 



et«rk Fork 



Arsenic 



Total Partial 



mg/kg 



Cadmium 



Total Partial 



mg/kg 



Copper 



Total Partial 



mg/kg 



Lead 



Total Partial 



mg/kg 



Zinc 



Total Partial 

 mg/kg 



U.3 



21.2 



34. S 



48.1 



78.4 



89.2 



94.1 



104.4 



115.7 



130.7 



HO. 8 



153.4 



168.3 



181.5 



207.1 



222.4 



228.4 



264.9 



299.6 



387.7 



399.7 



1 

 1 



1 



<0 



Major Tributariea 



Little Blackfoot 



River 

 Flint Cretk 

 Rock Creek 

 Blackfoot River 

 Bitterroot River 



3.2 17.0 0.7 0.8 



126.0 128.0 1.5 0.7 



5.4 14.0 <0.5 <0.1 



4.8 6.4 <0.5 0.3 



3.0 5.0 <0.5 <0.1 



Source: Andrews 1987. 



3-47a 



