Burial of Dredged Sediment Beneath the Floor of New York Harbor

Subaqueous burial of dredged sediment beneath the sea floor may be one way to better isolate and contain contaminated sediments on a disposal site as well as to restore the disposal site to the ambient conditions. The technology is available to construct a deposit of dredged sediment in a pit which might be mined into the sea floor and to cover, or cap, this deposit in the sand using conventional equipment. Such a project has been designed for a disposal site in New York Harbor. The deposit of dredged sediment is to be constructed in three stages and will ultimately contain about 915,000 yd³. The form of the first stage was predicted empirically using isopach maps of dredged sediment mounds in other areas. The first stage has been completed and its form was adequately anticipated.