6) Derivation of Loss Estimates 



A quantitative loss estimate was not developed due to lack of 

 density or population data. A qualitative assessment of low pos- 

 itive impacts was assessed due to the probability of an increase in 

 the osprey population; a trend noted at other Montana impoundments 

 (Swenson 1981, Grover 1983). Ihe low rating may be a conservative 

 estimate; howev^er, due to the lack of pre-project population inform- 

 ation and the probability the Kootenai River valley - particularly 

 the area north of the original townsite of Rexford - was good 

 quality osprey habitat prior to inundation, a greater positive 

 benefit could not be assessed. 



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