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the problem of turbidity and developing methods to predict the nature, extent, and duration of turbidity generated by dredging and disposal operations. Equal emphasis was also placed on evaluating both chemical and physical methods for controlling turbidity generation around dredging and disposal operations. 2. Although there are still many questions about the direct and indirect effects of different levels of suspended solids on various aquatic organisms, it may be necessary, under certain circumstances, to be able to predict the dispersive nature of the dredged material resuspended by a particular dredging or disposal operation as a means of evaluating the necessity for different control measures. Field studies of the short-term fate of dredged material slurry at open-water pipeline disposal sites indicate that the vast majority of any discharged fine-grained slurry descends rapidly to the bottom of the disposal site and forms a fluid mud layer. Although field measurements have provided a genera