Pishkrun Canal, which carries water from Diversion Reservoir to 

 Pishkun Reservoir, is 12 miles long and has a capacity of 1,200 second- 

 feet. Since the intake to Pishkun Canal is not screened, fish enter 

 the canal from Diversion Reservoir and large numbers are lost when the 

 cansil is drained each fall (Fish and Wildlife Service, 1952b). Ihe 

 canal extends through the foothills and into the prairie. A maintenance 

 road parallels the canal throughout its length. 



Pishkun Reservoir is an off stream irrpoundment on the plains about 

 12 miles northeast of Diversion Reservoiro It has a surface area of 

 1,550 acres at maximvm elevation. The water level in Pishkun remains 

 fairly stable during most of the year, although a rise occurs each 

 year beginning about Hay, The water level rose about 10 feet in May 

 1951 and remained fairly stable until July, when it dropped about 5 

 feet. Maximum and minimum annual fluctuations during the past 7 years 

 were 16 feet (I9i;9) and 9 feet (I9ii6), respectively. Pishkun Reservoir 

 is surrounded by grasslands. It is accessible by ranch roads from 

 Augusta, the maintenance road along Pishkun Canal, and a graded road 

 from Choteau. 



Fig. 3» — View of Willow Creek Reservoir showing 

 Willow Creek Dam in foreground. 



