279 



2 12-8-92 



Shoreline enclosed areas like those described above are currently being used in 

 Minnesota by the University of Mirmesota-Duluth researchers <is a too! for mercury 

 mitigation studies on Crane/Sand Point Lakes and at Indian Point on the SL Louis River. 

 Another UMD project is also working on sediment contaminant processing techniques that 

 would be demonstrated in the enclosed areas on the St Louis River Estuary. 



This ptDposed project would be a joint effort conducted by staff of the University of 

 Minnesota-Duluth and the Fond du Lac Natural Resources Department and Q)mni unity 

 College and is estimated to cost $175,000 for Year 1 and $125,000 for Year 2 to demonstrate 

 and assess the three treatment strategies that are judged to be the most cost effective and 

 practicable. 



2000 



1500 - 



1000 - 



500 - 







100 



200 



300 



Core Depth, cm 



Figure 1. Mercury concentrations (diy weight basis) at various depths in a sediment 

 core taken from the Thomson Reservoir in 1992 (J. Sorensen, unpublished data: do not 

 cite, copy, or quote). 



