Hydrographic Surveys
Pea Patch Island (Fort Delaware) Shoreline Protection
Location: Pea Patch Island, Delaware • Delaware River
S. T. Hudson Engineers was engaged to conduct a study and develop a design for restoration of the historic seawall protecting Fort Delaware on Pea Patch Island (between Fort Mott in New Jersey and Fort DuPont in Delaware, known as The Three Forts Crossing). This timber and stone seawall has been breached
and wave erosion is threatening the fort structure.
Hudson's work included hydrographic, side-scan sonar, magnetometer and archeological dive surveys (to identify potential historic artifacts), geotechnical and wave action studies. S. T. Hudson Engineers also designed the historic foundations for the prisoners' barrack structures. We researched fort archives to maintain the structures' historic significance.
Fishing Pier, Marina with Boat Ramp, Promenade and Dockmaster Building
Location: Gloucester City, New Jersey • Delaware River
 S. T. Hudson Engineers designed a fishing pier, marina (featuring twenty-four boat slips) with a boat ramp, 1,120 L.F. pedestrian promenade, and the dockmaster building at Proprietor's Park. Hudson performed field investigations, including hydrographic, archeological and topographic surveys. Hudson's scope included: obtaining necessary state and federal permits, dredging consultation, design and construction management. Hudson was responsible for the adjacent site work, including: parking facilities, landscaping, stormwater management, utilities, the creation of an inter-tidal habitat (mitigation) and ornamental fixtures.
This project was very unique due to the presence of several historic timber crib structures and a sunken historic vessel, the frigate "Augusta." Hudson located these obstructions and worked in conjunction with local and state historic preservation officials to minimize impact during construction and designed signage as an educational tool for the public. This project shall be the cornerstone to Gloucester City's waterfront development plan and a catalyst in the growth of the local economy.
Upgrading of Cape May, New Jersey and Lewes, Delaware Ferry Terminals
Location: Cape May, NJ and Lewes, DE
 S. T. Hudson Engineers is working with the DRBA in developing Master Plans for upgrading both terminals, and is designing elements of those plans, on an ongoing basis.
Work has included boardwalks and pre-stressed concrete bulkheads, upgrading entire dock facilities - including a state-of-the-art composite fendering system, ferry cradles, composite monopile-supported fender clusters, energy-absorbing pier end dolphin structures, and utility improvements. Hudson also performs numerous engineers'/divers' surveys, hydrographic surveys and dredging consultation.
Hydrographic Surveys of Intake Structures, Berths and Dredging Consultation
Location: Salem, Burlington and Mercer Generating Stations • Delaware River and Bay
S. T. Hudson Engineers performs annual pre- and post-dredge hydrographic surveys, with dredge quantity calculations for P.S.E. & G.'s Burlington Generating Station and Mercer Generating Station, both of which are located along the Delaware River. Hudson performs semi-annual bathymetric surveys at the Salem and Hope Creek Generating Stations, located in the Delaware Bay. Hydrographic surveys, cross-sections, side scan sonar imaging, intake profile charts, siltation/volume calculations and the security buoy installation/maintenance program are some of the services which Hudson provides to the nuclear facility.
These are Class I surveys, using Differential Global Positioning Systems, DGPS.
Other consulting services have included writing specifications, monitoring payment quantities, and collecting data for permit applications.
Hydrographic Surveys at Numerous Facilities
Location: New York/Northern New Jersey Metropolitan Area
S. T. Hudson Engineers is performing hydrographic surveys as a consultant to the Port Authority of New York and New Jersey throughout the New York Harbor area. Hudson assists the Port Authority in maintaining berths to accommodate the increasing volume of deep-hulled vessels. Hudson conducts surveys at navigable waterways adjacent to the Lincoln Tunnel, the Holland Tunnel, and the LaGuardia Airport providing the Port Authority with the necessary data to strengthen their security. Hydrographic surveys conform to Class I criteria as defined in the U.S. Army Corps of Engineers Manual EM 1110-2-1003. Deliverables are provided in state-of-the-art AutoCAD Formats.
Additionally, Hudson is evaluating marine structures at various port facilities. Services include condition surveys, laboratory testing of structural components, and review of peer's survey reports.
Hydrographic Survey for the USS New Jersey Memorial Pier and Museum
Location: Camden, New Jersey • Delaware River
An S. T. Hudson Engineers' survey team, following USACE Hydrographic Survey standards, performed a hydrographic survey using state-of-the-art equipment. The vessel's on-board computer correlates this data with concurrent fathometer readings, which are subsequently downloaded into an office CAD system to plot a finished hydrographic drawing with each sounding shown in its true position. Volume calculations are standard services provided for payment and budgeting purposes. Monitoring of construction, dredging and emergency response are some of the services provided to our clients. References and a list of projects are available upon request.
Rehabilitation of the South Brooklyn Marine Terminal (SBMT)
Location: Brooklyn, New York
S. T. Hudson Engineers performed engineers/divers surveys on various pier and bulkhead structures along the Brooklyn waterfront. A hydrographic survey was conducted at these waterfront structures using a differential global positioning system.
S. T. Hudson Engineers prepared detailed reports with recommendations and engineer's order of cost magnitude for our client's review. Based on these surveys, the 29th and 39th Street piers and the inshore bulkhead, between the 35th and 39th Street piers, were rehabilitated for future use. Our scope of work included: obtaining the necessary permits, designing repairs, and construction management. The 33rd and 35th Street piers were scheduled for demolition. S. T. Hudson Engineers obtained separate permits for the removal of portions of these waterfront structures, which included the removal of a large warehouse. We conducted a side scan sonar survey to determine if any debris from the demolition process was an obstruction in the navigational channel.
Rock Removal from Berth 3C Area
Location: Marcus Hook, Pennsylvania
S. T. Hudson Engineers performed side scan and scanning sonar imagery of the Berth 3C area and found several rock pinnacles to be removed. Hudson provided positioning, monitoring of removal process and post removal clearance surveys. Commerce provided all of the floating equipment and personnel to drill, break, and remove the rock, then barge the material away for disposal.
Mooring and Breasting Facilities for the Trump Yacht "Princess" & Repair of Bulkhead and Dredging at Senator Frank S. Farley State Marina
Location: Atlantic City, New Jersey • Clam Creek
S. T. Hudson Engineers designed the facilities for berthing this 1,800 DWT vessel in the Frank S. Farley State Marina, adjacent to the Trump Marina Hotel and Casino in Atlantic City. Construction was scheduled on a fast-track basis. The work included permitting for dredging a deeper channel for the 282 ft. LOA, 15.4 ft. draft luxury yacht, and project construction management.
Additionally, Hudson conducted a diver/engineer survey of 1,700 L.F. of deteriorated timber bulkhead, identifying areas of material degradation, marine borer activity and structural failure. We performed stability analyses, then developed both a design for short-term repair of 400 linear feet of bulkhead for immediate implementation, and a design for long-term rehabilitation.
Hudson's scope included pre- and post-dredge soundings, volume calculations, sediment sampling and analysis, permitting for both, bulkhead repairs and maintenance dredging, and construction management.
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840 Cooper St., Suite 400 
