Dredging


Over the last decade, Cashman Dredging and Marine Contracting Company, LLC has emerged as an industry leader in navigational and maintenance dredging projects. We provide deeper and cleaner waterways through innovative dredging, capping, and processing techniques developed for major East and Gulf Coast / Caribbean customers.

Cashman Dredging has undertaken some of the largest dredging projects in U.S. history. Our crews have moved millions of cubic yards of dredge material, sand, glacial till, clay, and rock, and are experts at processing toxin-impacted or contaminated materials using environmentally safe practices. Providing an array of integrated solutions ranging from environmental and navigational dredging to pond and industrial dredging, Cashman Dredging has earned a reputation for precision and quality. Cashman offers Owners minimal risk to execute their projects safely, on schedule, accurately, and at a predictable cost. Our experience includes working on heavily trafficked waterways, including on riverine and open-water environments. Channels are kept deep and wide enough through dredging for safe movement of ships from deep ocean waters to numerous East/Gulf Coast deep-water harbors.

Utilizing sound engineering and advancing the latest technologies, Cashman executes dredging and restoration projects across a broad range of services. We not only implement the dredging work, we also apply our extensive regulatory experience to help Clients navigate the often complex permit approval processes. Cashman supports the efforts of Clients like the Corps of Engineers at navigation channels and of Port Authorities and the Navy at harbors, and has experience in different kinds of dredging, as well as with the materials removed that differ in consistency and placement options.

Cashman's depth of experience—coupled with our vast fleet of equipment—makes us uniquely qualified to tackle our clients' most demanding dredging and environmental projects. And our history of on-time completions and excellent safety record are benchmarks of Cashman customer satisfaction.

Cashman recognizes its responsibility to improve the communities in which we work, whether projects are performed close to home or in the international market. That is why upholding our values of safety, integrity, accountability, and environmental conservation is paramount at each of our work sites. Our talented crews are implementing sustainable solutions through technology, innovation, and experience to meet all our Clients' dredging needs.

The history of Cashman dates back to the 1970s when Jay Cashman started a construction company in Boston. Throughout the 1980s and 1990s, Jay Cashman, Inc. grew its expertise and resources to become one of the preeminent heavy civil and marine contractors in the Northeast. During this time, Cashman completed smaller dredging projects primarily using mechanical dredges.

In 2003, Cashman Dredging and Marine Contracting Company, LLC was formed to focus more closely on the dredging industry and immediately started its growth into the industry leader it is today. After building its first large dredge with a Liebherr 995 excavator, Cashman completed the $36 million Kill Van Kull 8 contract for the U.S. Army Corps of Engineers (USACE) in New York/New Jersey. During this time, our company also completed numerous smaller navigation and environmental projects for private and public entities, expanding our range of capabilities and ability to complete nearly any project. In 2010, Cashman acquired the trailing suction hopper dredge Atchafalaya, making it one of only five firms in the country able to perform this specialized type of dredging. Today, Cashman Dredging is regarded as a leader in dredging with the equipment and resources to complete nearly any project.

Dredging Project Highlights

  • In 2009, General Electric recognized the firm's capabilities when it selected Cashman Dredging to perform the challenging task of removing more than 250,000 cubic yards of PCB-impacted material from the Hudson River during Phase 1 of the project.
  • After utilizing the 2010 season to review the results of the 2009 dredging season, General Electric selected Cashman Dredging for Phase 2 of the project for each of the next five dredging seasons (2011-2015) during which more than 2.5 million cubic yards of PCB-impacted material were removed from the Hudson River, and more than 2.6 million tons of backfill, isolation cap, and nearshore restoration materials were placed. The EPA called this multi-year project "a historic achievement."
  • Between 2010 and 2013, Cashman Dredging completed two large 50-foot capital dredging projects for the USACE in Newark Bay and the Arthur Kill channel, where more than 5 million square feet of rock were blasted and 1.5 million cubic yards of blasted rock were dredged and placed offshore. During these projects, more than 3.0 million cubic yards of Historic Area Remediation Site (HARS) suitable material were dredged and placed at the HARS, and more than 600,000 cubic yards of non-HARS material were dredged, processed, and placed upland as beneficial re-use material. A large array of equipment was utilized for the project including two large backhoe dredges and clamshell dredges. A custom-designed drilling and blasting barge was also built for the project.

Cashman Dredging has achieved a number of Outstanding and Exceptional Ratings including:

  • Outstanding Rating - USACE New England, O&M Dredging, Kennebec River, Maine (2011)
  • Exceptional Rating - USACE New England, Maintenance Dredging, 12-Foot and 15-Foot Federal Channels, 9-Foot Federal Anchorage and Turning Basin, and 5-Foot State Channels, Mystic River, Mystic, Connecticut (2015-2016)
  • Exceptional Rating - USACE Jacksonville, Tampa Harbor Maintenance Dredging, 43-Foot and 34-Foot Project, Channel Cuts A-K and Gadsden Point Cut, Hillsborough County, Florida (2016)

Whether dredging PCB-impacted material from the Hudson River, dredging during a harsh New England winter, renourishing a beach, or deepening or maintaining a navigation channel, Cashman Dredging delivers our work safely and effectively.

Dredging Services

  • Environmental and Remedial Dredging: Environmental and Remedial Dredging requires the highest level of precision to ensure that stakeholder goals are met. Our highly experienced management team excels on this type of work and looks forward to bringing their expertise to new projects.
  • Navigation Dredging: Whether it's maintaining ship berths or deepening a harbor to accommodate New Panamax ships, Cashman has the equipment and experience to execute seamlessly. Our expansive fleet of backhoe dredges, clamshell dredges, hopper dredge, split hull scows, and drilling and blasting equipment separates us from the field. While the right equipment is a necessity, our management is proud to have completed some of the largest harbor deepening and navigation projects in our nation's history.
Beach Renourishment: Cashman Dredging performs a wide range of land reclamation and beach renourishment projects. Through the use of our hopper dredge Atchafalaya, our hydraulic barge offloader, and our fleet of marine support equipment, Cashman can deliver the right solution for virtually any project.

Cashman has successfully completed projects from Maine to the Caribbean as well as the Gulf of Mexico. Our large marine fleet allows us to use our equipment in virtually any environment and location. Our team is well-suited to work in other countries, and we welcome interest from anyone requiring the kind of results that Cashman can deliver.

CLAMSHELL DREDGE: DALE PYATT

The Dale Pyatt clamshell dredge is equipped for offshore applications and contains one of the largest buckets in the Western Hemisphere.

CONSTRUCTION / CLASSIFICATION

Year Built: 2013
Certifications: ABS Classed / All Oceans, ABS International Loadline

APPLICATIONS

Maintenance Dredging
Channel / Harbor Excavation
Pier & Dock Excavation

MAIN DATA

  • Gross Tonnage: 1,179 tons
  • Length: 180 feet
  • Breadth: 65 feet
  • Depth: 12 feet
  • Freeboard: 6 feet
  • Draft: 6 feet
  • Environmental Bucket: 60 cubic yards
  • Heavy Duty Bucket: 28 cubic yards
  • Type of Crane: SEI 200
  • Max. Dredging Depth: 100 feet
  • Total Installed Power: 1,800 KW
  • Crane Engine Power: 1,600 KW
  • Positioning Equipment: Dredgepack® System

ADDITIONAL FEATURES

  • Equipped to dig using spuds for offshore applications
  • Also has a 4-point mooring system

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TRAILING SUCTION HOPPER DREDGE: ATCHAFALAYA

The Atchafalaya is split-hull trailing suction hopper dredge that disposes of material by bottom-dumping or pumping out through an on-board pump system. The Atchafalaya works well in harbors and inland waterways, as well as in unprotected waters. Her shallow draft and high maneuverability easily allow operation in relatively tight quarters. The Atchafalaya is equipped with state-of-the-art dredging production and operations monitoring instrumentation. She also uses the latest electronic positioning system.

CONSTRUCTION / CLASSIFICATION

Year Built: 1980
Certifications: USCG Unlimited Oceans / ABS Class A-1 Dredging Services / ABS International Loadline / ABS Coastwise Loadline

APPLICATIONS

  • Maintenance Dredging
  • Channel Excavation
  • Harbor Excavation

MAIN DATA

  • Gross Tonnage: 706 tons
  • Length: 197.8 feet
  • Breadth: 41 feet
  • Depth: 16.5 feet
  • Freeboard: 9.25 feet
  • Draft: 7 feet
  • Type of Pump & Pipeline: GIW 20-inch TBC Booster Pump, Ellicott 1170 16-inch Booster Pump, 4,000-foot HDPE Pipe
  • Hopper Capacity: 1,300 cubic yards
  • Max. Dredging Depth: 65 feet
  • Total installed power 3,000 HP
  • Propulsion 2 @ 860 HP
  • Primary pump power 850 HP
  • Positioning Equipment: Trimble DMS 132 DGPS, Rosemount 2051 Pressure Sensor, US Digital HD24A Rotation Sensor

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EXCAVATOR DREDGE: CAPTAIN A.J. FOURNIER

CONSTRUCTION / CLASSIFICATION

Year Built: 2001
Certifications: ABS Classed All Oceans / ABS International Loadline

APPLICATIONS
Maintenance Dredging
Pier & Dock Excavation
Channel Excavation
Harbor Excavation
Pipeline Excavation
Hard Rock Excavation
Ripping

MAIN DATA

  • Gross Tonnage: 706 tons
  • Length: 158.4 feet
  • Breadth: 50 feet
  • Depth: 10.5 feet
  • Freeboard: 5 feet
  • Draft: 5.5 feet
  • Type of Excavator: Liebherr 944 backhoe
  • Mud Bucket Capacity 12 cubic yards
  • Heavy Duty Bucket Capacity: 6.5 cubic yards
  • Max. Dredging Depth: 65 feet
  • Total Installed Power: 2,040 HP
  • Excavator Engine Power: 1,126 HP
  • Positioning Equipment: Dredgepack® System

ADDITIONAL FEATURES

  • Equipped with a Trimble MS860 L1/L2 RTK GPS with dual-antenna input
  • Powered with a Cummins KTTA38-C 1350, 12-cylinder diesel engine with 1256 HP/937 kW

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HYDRAULIC OFFLOADER / BOOSTER BARGE: KRAKEN

The Hydraulic Barge Offloader Kraken can operate either as a Barge Offloader or as a Booster Barge. It can also operate as a Barge Offloader and Booster Barge simultaneously. The barge is equipped with a six-point mooring system for offshore applications, and hydraulic spuds for other applications. The Kraken can work together with any mechanical dredge in our fleet as well as the TSHD Atchafalaya. With more than 4,500 total installed horsepower, the Kraken can easily offload and pump dredged material to a CDF or to a beach. The offloading pump is maneuvered by a large 120 ton Komatsu 1250.

CONSTRUCTION / CLASSIFICATION

Year Built: 1999 (Hull), 2016 (Equipment)
Certifications: ABS International Loadline, ABS All Oceans

APPLICATIONS

Hydraulic Offloading
Booster Barge
Simultaneously as Offloader / Booster Barge

KEY FEATURES

  • Gross Tonnage: 934
  • Length: 180 feet
  • Breadth: 60 feet
  • Depth: 12 feet
  • Max. Operating Depth: 100 feet
  • Positioning System: Dual RTK System
  • Spuds: 2 Hydraulic Controlled
  • Anchor System: 6-Point Remote Controlled
  • Submersible Pump: Damen DOP 450 mm
  • Booster Pump: 1,500 HP GIW 20"x20"
  • Makeup Water Pump: 700 HP Godwin 24"x20"
  • Jet Water Pump: 700 HP Godwin 10"x10"
  • Pump Control Excavator: Komatsu 1250

ADDITIONAL FEATURES

  • Equipped with a six-point mooring system, hydraulic controlled spuds, and a dual RTK positioning to ensure accurate hole placement
  • Capable of working in inlets and unprotected waters
  • Can operate either as a Barge Offloader or as a Booster Barge

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BACKHOE DREDGE: JAY CASHMAN

CONSTRUCTION / CLASSIFICATION
Class: Loadline

MAIN DATA

  • Gross Tonnage: 412 tons
  • Capacity: 900 tons
  • Length: 140 feet
  • Breadth: 39 feet
  • Depth: 9 feet
  • Compartments: 9
  • Bulkheads: 6 Transverse, 1 Full Longitudinal
  • Spud Wells: Three 25-inch (square)
  • Spuds: Two 60-foot x 24-inch (square), one 60-foot x 24-inch (walking)
  • Other: Vessel is fitted with a bow rake and square stern

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CLAMSHELL DREDGE: WOOD I

The Wood I is a Clamshell Dredge suitable for maintenance dredging projects. The dredge works in conjunction with Cashman's fleet of 3,500-to-4,000-yard bottom-dump barges and split-hull dump scows on projects involving off-shore disposal.

CONSTRUCTION / CLASSIFICATION
Year Built: 1943
Certification: Inland

APPLICATIONS
Maintenance Dredging
Pier & Dock Excavation

MAIN DATA

  • Gross Tonnage: 681 tons
  • Length: 134 feet
  • Breadth: 50 feet
  • Depth: 11 feet
  • Freeboard: 6 feet
  • Draft: 5 feet
  • Type of Crane: Lima 2400 B
  • Mud Bucket Capacity: 14 cubic yards
  • Medium Duty Bucket Capacity: 8 cubic yards
  • Heavy Duty Bucket Capacity: 6 cubic yards
  • Max. Dredging Depth: 100 feet
  • Total Installed Power: 1,400 HP
  • Crane Engine Power: 700 HP
  • Positioning Equipment: Dredgepack® System

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CLAMSHELL DREDGE: F.J. BELESIMO

Clamshell Dredge: F.J. Belesimo

CONSTRUCTION / CLASSIFICATION

Year Built: 2010
Certifications: ABS Classed / All Oceans, ABS International Loadline

APPLICATIONS

Maintenance Dredging
Channel / Harbor Excavation
Pier & Dock Excavation

MAIN DATA

  • Gross tonnage: 941 tons
  • Length: 160 ft.
  • Breadth: 60 ft.
  • Depth: 10.5 ft.
  • Freeboard: 4 ft.
  • Draft: 4.5 ft.
  • Type of Crane: Clyde 28
  • Mud Bucket Capacity: 22 yd^3
  • Sand/Hard Material Bucket Capacity: 13 yd^3
  • Heavy Duty Bucket Capacity: 8 yd^3
  • Max. Dredging Depth: 100 ft.
  • Total Installed Power: 2,000 hp
  • Crane Engine Power: 1,080 hp
  • Positioning Equipment: Dredgepack®

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STATEMENT OF QUALIFICATIONS

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FEATURED PROJECT

Broward County Intracoastal Waterway Dredging / Deepening

Existing depths in the Intracoastal Waterway (ICW), part of the federally-authorized navigation channel along Florida's east coast, were -10 feet (ft) Mean Low Water (MLW). The Florida Inland Navigation District (FIND) contracted with Cashman Dredging to deepen the ICW channel.

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Cross Island, South Basin Land Reclamation

Cashman was selected to be one of the primary contractors responsible for land reclamation efforts for this high-profile project. We were part of the team that completed the first-phase construction of "Cross Island," which will be the home of the Event Village for the 2017 America's Cup, hosted by Bermuda. Cashman proposed an innovative Design-Build option at the bid stage, providing nearly $5.0 million in savings to owner West End Development Company (WEDCo). Through value engineering and ongoing dialogue between the WEDCo and project team, constant evolution of the D-B works is leading to the most efficient, cost-effective, and environmentally sound installation for this high-profile project.

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Hudson River Environmental Remediation Dredging

Cashman Dredging was part of the dredging contractors that took part in one of the largest polychlorinated biphenyl (PCB) sediment remediation projects in U.S. history. When the final season was completed for General Electric in 2015, more than 2.75 million cubic yards of sediment from a 40-mile stretch of the upper Hudson River between Fort Edward and Troy, NY have been removed, and 100 percent of the PCBs targeted by the EPA have been addressed. It took "a world-class team of engineers and dredging experts to design and perform the work," which the EPA calls "a historic achievement."

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Tampa Harbor Maintenance Dredging

As part of a hopper dredging IDIQ MATOC with the USACE Jacksonville District, Cashman Dredging used the trailing suction hopper dredge Atchafalaya to conduct 43-ft and 34-ft dredging. The project scope included dike maintenance, weirs, bird monitoring, marine animal observation, and turbidity monitoring.

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Duxbury Harbor Maintenance Dredging

Maintenance dredging of portions of the Federal Navigation Channel in Duxbury Harbor was completed via a contract awarded to the Cashman/Burnham JV by the U.S. Army Corps of Engineers, New England District. The Duxbury Harbor Federal Navigation project consisted of an 8-foot deep, 100-foot wide and 1-mile long Entrance Channel, and an 8-foot deep, 21-acre Anchorage in the inner harbor. The harbor had not been dredged since 1997, and the accumulated sediment made parts of the harbor dangerously shallow.

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