water for Milltown residents. Construction of a new central 

 water system for Milltown was begun in the fall of 1984 and 

 completed in June, 1985. 



With the immediate, pressing problem of the Milltown 

 water supply corrected, a more extensive Feasibility Study 

 (FS) was initiated to address ways to: 



o minimize down gradient/down stream release of 

 contaminants originating at Milltown Reservoir, and 



o minimize ingestion of contaminants originating at 

 the Milltown site. 



The FS, which is being conducted by Harding Lawson 

 Associates, is currently in progress. Additional groundwater 

 monitoring and limited groundwater modelling is being 

 conducted below the reservoir. Thus far, the FS has narrowed 

 the list of clean up options to six potential alternatives, 

 ranging from no action to complete dam retirement (with 

 stabilization of sediments and reestablishment of a free- 

 flowing river). Other alternatives include excavation, 

 "institutional controls," chemical stabilization of sediments 

 and channel isolation (with the reservoir left in place). 



FUTURE ACTIVITIES ; The FS, including selection of a prefer- 

 red alternative, will be completed in the winter of 1986. 

 After a 30 day review period, public hearings will be 

 conducted to allow comment on the preferred alternative. 

 Following selection of the preferred alternative, design and 

 implementation of clean-up could begin sometime in 1986. 

 The Superfund activities have a significant bearing on the 

 Montana Power application to the Federal Energy Regulatory 

 Commission for relicensing the dam. (See Study 14.1) 



41 



