Framework for Dredged Material Management
isolating the dredged material from adjacent waters during placement. Confined
disposal does not refer to subaqueous capping or contained aquatic disposal.
Confined disposal facility (CDF)
An engineered structure for containment of dredged material consisting of dikes
or other structures that enclose a disposal area above any adjacent water surface,
isolating the dredged material from adjacent waters during placement. Other
terms used for CDFs that appear in the literature include "confined disposal area,"
"confined disposal site," and "dredged material containment area."
Contained aquatic disposal
A form of capping which includes the added provision of some form of lateral
containment (for example, placement of the contaminated and capping materials
in bottom depressions or behind subaqueous berms) to minimize spread of the
materials on the bottom.
A chemical or biological substance in a form that can be incorporated into, onto,
or be ingested by and that harms aquatic organisms, consumers of aquatic
organisms, or users of the aquatic environment.
Contaminated sediment or contaminated dredged material
Contaminated sediments or contaminated dredged materials are defined as those
that have been demonstrated to cause an unacceptable adverse effect on human
health or the environment.
See Management action.
Disposal site or area
A precise geographical area within which disposal of dredged material occurs.
Material excavated from waters of the United States or ocean waters. The term
dredged material refers to material which has been dredged from a water body,
while the term sediment refers to material in a water body prior to the dredging
Dredged material discharge
The term dredged material discharge as used in this document means any addition
of dredged material into waters of the United States or ocean waters. The term
includes open- water discharges; discharges resulting from unconfined disposal
operations (such as beach nourishment or other beneficial uses); discharges from
confined disposal facilities that enter waters of the United States (such as effluent,
surface runoff, or leachate); and overflow from dredge hoppers, scows, or other