Figure 1. Upland CDFs initially explored for site selection

ERDC TN-DOER-C22

September 2001

INITIAL SURVEY OF CDFs: A limited survey of USACE Districts was conducted to obtain the

following information on upland CDFs within the United States collected on the sediment before

dredging:

Contaminant types and levels.

Bioassays of dredged materials.

Freshwater or marine origin.

and after placement into the CDF:

Chemical behavior of contaminants.

Survey of biota.

Bioassays of dredged materials.

Availability of dredged material for bench- and field-scale testing.

Easy accessibility of the CDF.

This initial survey focused on freshwater dredged material. The goal was to identify one site to serve

as an example for testing of inorganics and one other site to serve as an example for testing of

organics. Based on the information collected, three sites in the Great Lakes area with known

predredging contaminant types

and levels were initially selected

for verification of chemical

composition, evaluation of nu-

trient levels, and preliminary

survey of biota: Monroe, MI,

Manitowoc, WI, and Bayport,

WI (Figure 1). The three sites

were visited on 5 and 6 June

2000, their locations were re-

corded (in universal transverse

Mercator coordinates), land-

scape/ vegetation characteristics

were summarized, dredged

material samples were collected

and shipped on ice to the respec-

tive laboratories for chemical/

physical analysis, and other

dredged material samples were

collected for macroinvertebrate

survey purposes.

Figure 1. Upland CDFs initially explored for site selection