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Detailed Map
Reference Site Location
The Central Long Island Sound Disposal Site (CLDS)
is one of four regional dredged material disposal sites located
in the waters of Long Island Sound. CLDS covers a 6.86 km² (2
nmi²) area and is centered at 41° 08.905' N, 72° 53.073' W (NAD
83). It is located approximately 10.89 km (5.6 nmi) south of
South End Point, East Haven, Connecticut. Historically, CLDS
has been one of the most active disposal sites in the New England
region. Since 1980, 6,301,000 yd3 of dredged material
have been disposed of at the site.Sediments deposited at CLDS
have been dredged from New Haven, Bridgeport, Stamford, and
Norwalk Harbors, as well as other adjacent coastal areas.
Since 1977, the management strategy at CLDS has entailed the
controlled placement of small to moderate volumes of sediment
to form individual disposal mounds on the seafloor. These discrete
disposal mounds are monitored individually to assess mound stability,
material thickness, and benthic recolonization status relative
to the results of previous monitoring surveys and in comparison
to ambient sediments within nearby reference areas. Beginning
in 1984, this management strategy was modified to include the
selection of dredged material placement locations in a manner
that would promote the development of rings of disposal mounds
on the CLDS seafloor. The networks of mounds would form containment
cells on the seafloor that would facilitate subsequent large-scale
confined aquatic disposal (CAD) operations. Containment cells
are useful in limiting the lateral spread of unacceptably contaminated
dredged material to facilitate efficient coverage with capping
dredged material. The New Haven 1993 (NHAV 93) Mound represents
the first CAD mound developed at CLDS. Currently, two additional
containment cells are nearing completion on the CLDS seafloor.
Check out site data!
Annual Disposal Volumes
Bathymetry
Sediment
Profile Images
Redox Potential
Discontinuity (RPD) and Organism-Sediment Index (OSI)
Relevant DAMOS Reports:
No.
159:Monitoring Survey at the Central Long Island Sound Disposal
Site, September 2003
(full report available)
No.
142: Monitoring Cruise at the Central Long Island Sound Disposal
Site, June 2001 (full report available)
No. 139: Central Long Island Sound Disposal Site Synthesis Report,
1999-2000 (full report available)
No. 135: Monitoring Cruise at the Central Long Island
Sound Disposal Site, September 1997 and March 1998 (full report available)
No. 120: Monitoring Cruise at the Central Long Island Sound
Disposal Site, July 1996 (executive
summary available)
No. 118: Monitoring Cruise at the Central Long Island sound
Disposal site, September 1995 (executive summary
available)
No. 117: Monitoring Cruise at the Central Long Island Sound
Disposal Site, July 1994 (executive
summary available)
No. 97: Monitoring Cruise at the Central Long Island Sound Disposal
Site, June 1991 (executive
summary available)
No. 94: Monitoring Cruise at the Central Long Island Sound Disposal
Site, July 1990 No. 72: Monitoring Cruise at the Central Long
Island Sound Disposal Site, July 1988
No. 68: Monitoring Cruise at the Central Long Island Sound Disposal
Site, August and September 1987
No. 63: Monitoring Cruise at the Central Long Island Sound Disposal
Site, July 1986
No. 57: 1985 Monitoring Surveys at the Central Long Island Sound
Disposal Site: An Assessment of Impacts from Disposal and Hurricane
Gloria
No. 46: Disposal Area Monitoring System (DAMOS) Annual Report,
Summary of Program Results, 1981-1984
No. 38: Results of Monitoring Studies at Cap Sites #1, #2, and
the FVP Site in Central Long Island Sound and a Classification
Scheme for the Management of Capping Procedures No. 25: Status
Report, Disposal Operations at the Central Long Island Sound
Disposal Site
No. 22: DAMOS Mussel Watch Program, Monitoring of the "Capping"
Procedure Using Mytilus edulis at the Central Long Island Sound
Disposal Site
No. 16: Deployment of Dredged Material Disposal Buoys at the
Central Long Island Sound and Western Long Island Sound Disposal
Sites
No. 8: Management and Monitoring of Dredge Spoil Disposal and
Capping Procedures in Central Long Island Sound
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