PREFACE 
This report is published to provide coastal engineers with informa- 
tion on the lethal effects of suspended sediments on estuarine organisms. 
The work reported is a part of a continuing program of research on the 
ecological effects of coastal engineering activities. The report pre- 
sents the results of part of a 3-year laboratory study on the subject. 
The work was carried out under a contract originating in the Office, 
Chief of Engineers, which was monitored under the coastal ecology research 
program of the U.S. Army Coastal Engineering Research Center (CERC). 
The original contract report (CERC Contract No. DACW72-71-C-0003) was 
prepared by Dr. J.M. O'Connor, Mr. D.A. Neumann, and Dr. J.A. Sherk, Jr., 
while on the staff of the Natural Resources Institute, University of 
Maryland, College Park, Maryland. 
Mr. A.K. Hurme, CERC, technically reviewed, condensed, and revised 
that part of the original report pertaining to the lethal effects of 
suspended solids on estuarine fish. Mr. Robert M. Yancey, Chief, Ecology 
Branch, was CERC contract monitor for the report, under the general 
supervision of Mr. R.P. Savage, Chief, Research Division. 
Comments on this publication are invited. 
Approved for publication in accordance with Public Law 166, 79th 
Congress, approved 31 July 1945, as supplemented by Public Law 172, 88th 
Congress, approved 7 November 1963. 
JOHN H. COUSINS 
Colonel, Corps of Engineers 
Commander and Director 
