STUDY NUMBER ; 2.3 



ORGANIZATION ; Montana Department of Fish Wildlife and Parks 

 (MDFWP) 



TITLE OF STUDY ; Evaluation of the Effects of Pulp and Paper 

 Mill Effluents on the Fish Populations of the Middle Clark 

 Fork River 



CONTACTS ; Pat Graham - MDFWP - 444-3186 



Dennis Workman - MDFWP, Missoula - 721-5808 



Rod Berg - Project Biologist - MDFWP, Missoula - 



721-5808 



OBJECTIVE ; Obtain fishery and aquatic baseline data on the 

 Clark Fork River and determine if present (or additional) 

 quantities of treated pulp mill waste from Champion Interna- 

 tional's Frenchtown Mill is having (or will have) a detri- 

 mental effect on the river's trout populations. 



DURATION ; July, 1984 - July, 1986 



CURRENT STATUS ; Trout population estimates have been 

 conducted at one section above the mill (from the Bitterroot 

 to Harper's Bridge) and at one site below the mill (near 

 Superior). The suitability of the intergravel environment 

 for trout egg survival has been evaluated by water sampling 

 (using standpipes) and in-site bioassays. The bioassays, 

 using brown trout eggs, were conducted during the winter and 

 early spring of 1984-85. Three sites were evaluated: Near 

 the Council Grove area, below Champion International and near 

 Cyr. Two progress reports, available from DFWP in Missoula, 

 have been prepared; 



