CUMULATIVE EFFECTS TO FISHERIES 



• Cumulative Effects qft/ie JVo^ction 

 JlltemaHve to FH^Iieries 



The cumulative effects of the No- 

 action Alternative would be 

 similar to those described in the 

 existing conditions. Fish 

 habitat and populations would not 

 be altered by this alternative. 



• Cumulative E^ffectst^tlieJlctionJtlternative 

 to Fislieries 



The cumulative effects of this 

 alternative would be related 

 primarily to risk of fine- 

 sediment delivery to a spawning 

 stream. Risk of increased 

 sediment loads from in- channel 

 sources is unlikely because the 

 allowable water-yield increase 

 would not be affected by the 

 proposed salvage (see APPENDIX 

 D - WATERSHED AND HYDROLOGY 

 ANALYSIS) . Introduced sources of 

 sediment would be related 

 primarily to a proposed stream- 

 crossing removal. These impacts 



would be short term during the 

 course of operation. Once the 

 work is completed, the supply of 

 fine sediment would return to 

 levels described in the existing 

 conditions, and the long-term 

 risk of sediment delivery to Soup 

 Creek would be reduced by the 

 removal of a potential sediment 

 source. 



The effects of past ground-based 

 operations in the proposed 

 project area have not led to any 

 identified sources of sediment to 

 spawning sites in the Soup Creek 

 watershed. The inclusion of the 

 direct and indirect effects 

 expected from the action 

 alternative to the existing 

 conditions would have a low risk 

 of changing this. As a result, 

 the proposed action alternatives 

 would have low risk of cumulative 

 impacts on fisheries populations 

 in the Soup Creek watershed or 

 downstream waters 



P 



Big Blowndown Salvage 



Page F-3 



