Boston Harbor
TG&B collected over 300 vibrocore samples in the approaches to and
throughout Boston and Weymouth Harbors for the Boston Harbor Dredging Project
funded by the U.S. Army Corps of Engineers.
Using the 99-foot vessel NOBKSA, cores were taken to a penetration depth
of 3 meters in water depths of 13 meters.
New Bedford (MA) Harbor Superfund Site
TG&B collected 6.5 meter vibrocores throughout the outer harbor of New
Bedford, MA and collected 66 other cores on a precision grid in a pre and
post-dredging program to determine the effectiveness of new dredging
technologies at this superfund site. TG&B has also provided coring services
and vessel support for four other engineering companies on projects throughout
New Bedford Harbor.
Lake
Champlain
TG&B performed a site investigation
at a former MGP plant in Lake Champlain in Plattsburg NY.
The project consisted of conducting a bathymetric survey and collecting
70 vibrocores. Water and grab
samples were also collected throughout the area.
Offshore Borneo
TG&B built, deployed and recovered 1000 meter moorings using RDI and
Aanderaa current meters in the Makassar Strait off Borneo in support of an
oceanographic program to determine currents for UNOCAL rigs working in the area.
TG&B also rigged the vessels that were used on the program.
New England Harbors (26)
From 2002-2005 TG&B was contracted to collect vibracore samples from 26
harbors from Manius, CT to Buck’s Harbor, ME.
The purpose of the work was to identify sediment grain size and chemical
content in advance of federal government dredging programs.
Reference samples were also collected from offshore reference sites.
Pilgrim Nuclear Power Plant and Logan
International Airport
TG&B
was selected to supply, install, and maintain 12 Coast Guard-type Gilman buoys
to mark the Exclusionary Zone along the offshore perimeter of the nuclear plant. The buoys are deployed in water depths of 10 to 40 feet on
Plymouth’s exposed coast on Cape Cod Bay, Massachusetts.
TG&B also installed an 800 foot security boom across the plant’s
intake. At Logan, TG&B installed 29
buoys demarcating the security zone.
South Coast of Massachusetts
In
a project to determine a route to lay a buried cable to instrumentation in the
Atlantic Ocean offshore Martha’s Vineyard, TG&B was contracted to collect
36 vibrocores. Water depths ranged
from 7 to 24 meters. A variety of
sands, clay, peat and gravel were encountered in the three meter long cores.
As part of the overall contract, TG&B performed penetrometer and
shear strength tests on the samples and advised on the optimum route for the
cable.
Massachusetts
Military Reservation, Superfund Site
TG&B
provided full marine support and logistics as part of the 1998-2000 drilling
program at the MMR superfund site. This
included support of multiple drilling operations on John’s Pond in 1998
Ashumet Pond in 1999-2000. TG&B
collected 3 meter continuous vibracore samples in addition to providing two
drilling barges, captain and diving services, positioning services, and rig
moving and related services to three other organizations.
In over 12 months of drilling operations, no delays were encountered as a
result of the marine support.
Neponset
Reservoir, Foxboro, MA
As
in many projects of this type, TG&B provided boat support, sampling
equipment and sample collection expertise for the ongoing site investigation at
the Neponset Reservoir. The sampling included sediment core collection, surface
sediment sampling, water and biological sampling, and peizometer installation.
New Bedford Harbor
TG&B
established a precision navigation network, performed extensive bottom grab
sampling and gravity coring surveys, and participated in a dye dispersion study
in the New Bedford Harbor. In addition,
TG&B conducted current profiling and deployed current meter moorings.
Boston Harbor
TG&B
provided vessel support on the geophysical and marine archeological survey at
the proposed sewer diffuser site offshore Boston Harbor.
Side scan sonar, magnetometer and precision bathymetric data were
collected as over 500 line miles were covered during the survey.
Hudson
River and Boston Harbor
From 2003-2005, TG&B performed
site investigations in four sites in the Hudson River and in Boston Harbor’s
Fort Point Channel. Each project included
grab samples and precision positioning of 20-25 stations.
New England Harbors
TG&B
performed numerous side scan sonar surveys and underwater video surveys to
locate and map bottom obstructions at several ports and harbors throughout New
England. TG&B has also managed
several dive operations.
Massachusetts
DEM
As
part of an Office of Waterways blanket contract for testing services, TG&B
was selected as the only qualified sampling contractor.
TG&B has performed various sediment sampling programs in rivers and
harbors throughout the state as part of this ongoing program.
Narragansett Bay, R.I.
TG&B
performed several offshore sand inventory programs for Woods Hole Group.
The work included taking 4 meter vibrocores and providing positioning
services. TG&B also provides boats
and personnel for the real time oceanographic PORTS program in Narragansett Bay,
Rhode Island on an ongoing basis.
St.
Lawrence Seaway
TG&B
mobilized two vessels and coring systems on 3 day notice and conducted an
extensive vibrocore sampling program at the Snake River and St. Lawrence Seaway
for PCB analysis. Over 250 cores were
obtained during the three week sampling period. TG&B vessel operators are OSHA HAZWOPER-trained for sampling at
superfund sites.
Boston Harbor
As
part of the MWRA Harbor studies program, TG&B provided vessel support on
extensive plume tracking surveys at the Nut Island and Long Island Sewage
Outfalls and harbor background studies. These
surveys were performed utilizing Battelle’s integrated towed survey system,
the Mini-Boss. TG&B also provided
vessel support on benthic sampling operations using grab samplers and a sediment
profile camera, and supported diver operations and underwater video surveys for
Benthic Flux studies.
Lake Erie
TG&B
performed box coring operation in Narragansett Bay and Lake Erie for ADL in
support of the National TBT Monitoring Program. The TG&B survey vessel was
trailered to several sites in the two areas and successful box cores were
collected using the R/V Surveysa’s custom hydraulic A-frame, which permitted
sampling with only a two man crew.
Block Island Sound
TG&B
collected vibrocores up the 5 meters long between Block Island and Long Island
during 2000. The purpose of the
study was to determine sand deposits, cultural resources and to groundtruth
subbottom data. TG&B chartered and outfitted the 68 foot “Beavertail”
for this work.
Lake Ontario
TG&B
mobilized a vessel on Lake Ontario and collected vibrocores to a depth of 3
meters to determine sand deposits for beach protection and replenishment
studies.
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