Table 4. Physical Properties of Sediment Dredged in the New York MetropoHtan Area 



Dredged Area 



Years of 

 Observation 



Median Grain Size 

 (microns) 



Grain Density 

 (g/cm^)* 



Bulk Density 

 (ui situ) 

 (g/cm3) 



Porosity 

 (percent) 



Hudson River 



1955-1968 



44 

 65 

 28 



2.64 

 2.69 

 2.66 



1.24 

 1.24 

 1.43 



85 

 73 



Lower Bayt 



1954-1967 



55 



110 



46 



2.55 

 2.69 



1.34 

 1.40 

 1.3 



78 

 75 

 79 



New York- 

 New Jersey Channels 



1958-1967 



350 

 41 



2.79 

 2.69 



1.43 

 1.31 



80 



Raritan River 



1958-1967 



9 



2.62 



1.42 



75 



Ambrose Channel 



1956-1968 



160 

 220 



2.625 

 2.636 



2.09 

 1.82 



32 

 50 



Sandy Hook Channel 



1960-1968 



250 

 220 



1.89 

 1.98 



1.89 



47 

 42 



South Shore 

 Long Island 



1955-1968 



530 

 410 

 270 



2.67 



2.07 

 1.92 

 1.98 



38 

 40 

 42 



t Percent Loss on Ignition: 15.0, 13.0, and 2.3. 

 * One gram per cubic centimeter is equivalent to one metric ton per 

 cubic meter or 62.4 pounds per cubic foot. 



after Gross, 1969 



38 



