The Mount Haggin waters are primarily soft water streams. Slaughter- 

 house, Sevenmile and Sixmile Creeks are exceptions and exhibited hard water 

 in the moderate range. Calculation of Ryznar stability and Langelier 

 Saturation Indeces indicate that most Mount Haggin waters are corrosive, 

 rather than scale-forming, in nature. Water hardness increased with 

 decreasing discharge. 



The Mount Haggin streams are calcium-magnesium-bicarbonate or calcium- 

 sodium-bicarbonate waters. Concentration of component anions and cations 

 were extremely low in the streams that originated at high elevations. The 

 major dissolved component following bicarbonate in the streams was silica. 

 Ionic concentrations achieved much higher levels in the streams that originated 

 at lower elevation. 



Concentration of individual cations increased as discharge decreased on 

 all Mount Haggin streams. This same trend was observed during a study of the 

 Big Hole River (Bahls, 1978). The dominant cation in all streams was calcium 

 (x = 4.4 to 39.4 mg/1) followed by magnesium or sodium. 



With the exception of the bicarbonate ion, concentration of anions did 

 not increase as discharge decreased. Sulphate, chloride and fluoride ions 

 generally decreased in concentration as the flow decreased. In some cases, 

 a slight increase in concentration was noted between the intermediate and 

 low flows; however, the highest concentrations of these ions were found at 

 the high flow sample. Still another pattern was observed in concentration 

 of nitrate. Nitrates generally reached maximum concentration at the inter- 

 mediate flow sample and minimum concentration at low flow. Bicarbonate was 

 the dominant anion in all of the studied streams followed by sulphate. 



Total sediment levels were extremely low in most cases in Mount 

 Haggin streams. Heavy concentrations of sediment were measured in Cali- 

 fornia Creek (235.8 mg/1) and French Creek (98.3 mg/1) at the intermediate 

 flow following a rainstorm. High concentrations of total recoverable iron 

 also accompanied these sediment increases. Similar concentrations were 

 not measured in other Mount Haggin streams. 



Arsenic concentrations were measured at high and low flow in all of 

 the studied streams (Table 2). Concentrations of arsenic generally increased 

 as stream origin moved from the southwest to the northeast and with the 

 proximity of the stream headwaters to the Anaconda Smelter (Figure 2). 

 Mean arsenic concentration ranged from 1.1 ug/1 in Seymour Creek to 33.4 

 ug/1 in Willow Creek. Concentration increased between the high and low 

 flows in all studied streams except Oregon Creek. 



