on the previous record) (Figure 3) . Low flows in the summer of 

 1988 approached and may have exceeded record daily low flow 

 levels based upon provisional USGS flow records (Figure 4). In 

 contrast, discharge during the low flow period in the years 1967 

 to 1972 (years preceding and during previous fisheries work in 

 the Blackfoot River) were about average. Spring runoff flows 

 during this period were generally far above average (Figure 3). 

 Early fall stream flows at selected sites in the upper Blackfoot 

 River were consistently less in 1988 than in the 1970 's (Table 

 1) . Contrasting streamflows during these two periods of fish 

 sampling are important to consider when interpreting observed 

 changes in fish populations between the early 1970 's and 1988. 



Table 



Comparison of September stream flows at selected sites 

 in the headwaters of the Blackfoot River, 



Location 



Year 



Date 



Stream flow 

 (cubic feet/sec' 



Blackfoot River 

 Below Pop's Place 



Blackfoot River 

 Flesher 



Blackfoot River 

 Hogum 



Blackfoot River 

 Dalton bridge 



Blackfoot River 

 Canyon campground 



Alice Creek 



Copper Creek 



Landers Fork 



at HWY 200 bridge 



11 



