contaminant sources for the Silver Bow Creek study area 

 identified by MultiTech (1987a) are summarized in Table 3-18, 



TABLE 3-18. 



SUMMARY OF CHARACTERIZED AND POTENTIAL SOURCES 

 OF CONTAMINATION TO SILVER BOW CREEK 



Potential Source 



Type 



Contaminants 



Metro Storm Drain Point Source 

 Missoula Gulch Point Source 



Browns Gulch 



Butte WWTP 



Montana Street to 

 Colorado Tailings 



Mill-Willow Bypass 



Colorado Tailings 

 to Silver Bow 

 Siding 



Ramsay Flats to 

 Opportunity 



Point Source 



Point Source 



Nonpoint Source 

 (ground water 

 inflow) 



Nonpoint Source 

 (ground water 

 inflow) 



Nonpoint Source 

 ( re-entrainment) 



Nonpoint Source 

 (re-entrainment) 



Cd,Cu,Fe,Zn,S04 



Cd,Cu,Pb,Zn, (low 

 flow) Cd,Cu,Pb,Zn,Fe, 

 As,TSS (high flow) 



As,Fe,Pb,TSS (high 

 flow) 



Total P, Orthophos- 

 phate (Cd,S04,Zn 

 during ground water 

 pumping) 



As , Cd , Cu , SO4 , Zn 



Fe,S04,Zn 



Channel sediments 



Channel sediments 



Source: MultiTech 1987a. 



Water Quality Bureau FY 1985-87 investigations indicate 

 that Silver Bow Creek from Butte to the Warm Springs 

 treatment ponds is seriously polluted with copper and zinc on 

 a year-round basis. The highest concentrations of both 

 copper and zinc in the Clark Fork Basin occurred in this 

 area. A large portion of the metals load is attenuated in 



3-67 



