obtained from Soyland Power Company, the U.S. Army Corps of 

 Engineers, or a consortium of fleeting companies. 



When Soyland Power Cooperative decided not to build the power 

 plant, because of declining demand for electricity, the project 

 was extended and funding increased so that a new site could be 

 located and another reconnaissance survey completed. In spring 

 1983, we selected the Naples Terminal Company at Illinois River 

 miles 61.4-70.2 for our study site (Figure 1). In June 1983, we 

 qualitatively sampled mussel beds in the area with a crowfoot bar. 

 The crew then quantitatively sampled a bed which eventually would 

 be heavily fleeted and another bed downstream which would not be 

 fleeted. Our sampling locations were marked permanently by steel 

 ground anchors whose exact positions could be determined by 



triangulation from two locations on shore. 



s 



We were not able to secure financial support beyond that 



J^ provided by the National Marine Fisheries Service and the Illinois — &- 



Department of Conservation, so we changed the design of the study 



to obtain results after only two summers of field work instead of 



the five summers originally envisioned. _$The new^approadh was a 



manipulative experiment where marked mussels were placed in both 



fleeted and unfleeted areas starting in spring 1984. The next 



section of the report gives details of the methodology and the 



following section- describes project results through fall 1984. 



Results of the 1985 field work will be given in the project 



completion report in 1986. 



3 



