DISCLAIMER 



The findings, conclusions, and views expressed herein are those of the researchers and 

 should not be considered as the official position of the Illinois Department of Natural 

 Resources. 



ACKNOWLEDGMENTS 



The Sediment Toxicity in Reach 15 of the Upper Mississippi River Study was supported 

 by a grant from the Illinois Department of Conservation (IDOC) (Contract number PC 955391). 

 The IDOC was reorganized as the Illinois Department of Natural Resources (IDNR) on 1 July 

 1995. Additional assistance was provided by the Illinois Natural History Survey (INHS) and 

 the Upper Mississippi River System Long Term Resource Monitoring Program (LTRMP), a 

 cooperative effort of the U.S. Army Corps of Engineers, National Biological Service, and the 

 natural resource agencies of Illinois, Iowa, Minnesota, Missouri, and Wisconsin. 



We thank the following persons who contributed to this study: Mike Coffey of the U.S. 

 Fish and Wildlife Service (Rock Island, IL) for helping in the collection of the sediment 

 samples, exchange of information, and for providing the transportation and equipment needed to 

 collect sediment samples from Reach 15; Darin Osland (INHS) for assisting with the toxicity 

 tests during the second year of the study; and Scott Whitney (INHS) for providing deertoe 

 mussels for the bioassays. We also acknowledge Ms. Teresa Norberg-King of the 

 Environmental Research Laboratory of the United States Environmental Protection Agency 

 (USEPA) at Duluth, Minnesota, for the starter culture of Ceriodaphnia dubia used in our assays. 



