TABLE 3-1 Summary of 26 Environmental-Dredging Projects Selected for Evaluationa

Project

Primary Chemicals of Concern

Water- Body Type

Remedy Type

Scale of Effort

Dates of Dredging

Volume of Dredged Sediment (cy)

Bayou Bonfouca, LA

PAHs

Bayou

Dredging followed by backfilling

Full-scale

1994-1995

170,000

Lavaca Bay, TX

Hg

Estuary

Dredging

Pilot

1998

80,000

Black River, OH

PAHs

River

Dredging

Full-scale

1989-1990

45,000-60,000

Outboard Marine Corp., Waukegan Harbor, IL

PCBs

Harbor

Dredging

Full-scale

1991-1992

38,000

Commencement Bay–Head of Hylebos, Tacoma, WA

PCBs, As, PAHs

Estuary

Dredging

Full-scale

2003-2006b

419,000c

Commencement Bay–Sitcum, Tacoma, WA

As, Cu

Estuary

Dredging

Full-scale

1993-1994

428,000d

Duwamish Diagonal, Seattle, WA

PCBs

Tidally influenced river

Dredging followed by capping

Full-scale

2003-2004

66,000



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