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Title: Monitoring of Boston Harbor confined aquatic disposal cells
Authors: Hales, Lyndell Z.
Keywords: Boston Harbor
CAD cells
Cap erosion
Clamshell dredge
Confined aquatic disposal
Contaminated sediments
Erosion rate
Navigation channel
Propeller wash
Sediment resuspension
Suspended sediment
Tidal currents
Water quality
Issue Date: Sep-2001
Publisher: Coastal and Hydraulics Laboratory (U.S.)
Engineer Research and Development Center (U.S.)
Series/Report no.: ERDC/CHL TR ; 01-27.
Description: Technical report
The Boston Harbor Navigation Improvement Project (BHNIP) involves deepening of the main ship channel and three tributary channels to the Inner Harbor, and associated berthing areas. Lack of an upland disposal site and resource agency denial of permission to place and cap the contaminated sediments at an open water site resulted in the decision to use in-channel CAD cells for placement of contaminated material that would be dredged with an environmentally sensitive clamshell bucket. The monitoring plan was composed of three primary activities: (a) water quality monitoring of suspended solids near the operation of two environmentally-sensitive clamshell dredges and a normal clamshell, to document the benefits of the special clamshell buckets, (b) monitoring contaminated dredged material consolidation and strength prior to and after placing the sand cap, and (c) calculating cap erosion predictions from both tidal currents and ship propeller wash to characterize the likely amount of cap damage to be expected from either source.
Appears in Collections:Technical Report

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