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HARBOR WORKS
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GLDD's harbor works projects are typically capital dredging projects undertaken by government agencies and port authorities on behalf of the communities and enterprises participating in international and coastal trade. Such works often entail the deepening of channels and waterways either inside a harbor or within its approaches. They may involve the reclamation of land to provide sites for transportation infrastructure – rail lines and yards, roadways, and container terminals. This includes the full range of port infrastructure works needed by the U.S. military.
Other capital works include excavation of trenches for tunnels, pipelines, water inlets and cable crossings, as well as construction of berms, breakwaters, jetties, and canals. In harbor work, we excavate the full range of underwater materials, ranging from sands, silts and clays to igneous and sedimentary rock formations. Great Lakes has more experience than any other dredger in the Western Hemisphere when it comes to removal of rock, having been involved in every major rock project in U.S. history.
| BALTIMORE HARBOR MAINTENANCE DREDGING |

| Location |
| | Baltimore Harbor, Maryland |
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| Client |
| | USACE – Baltimore District |
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| Contract |
| | Dredge Type: Clamshell Dredge
Dredge: No. 54, No. 55
Quantity: 3,000,000 cubic yards
Duration: November 2011- February 2012
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| Description |
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This project entailed maintenance dredging within the Craighill Angle and the Brewerton Channel Eastern Extension of the Chesapeake Bay. Dredging operations were performed by the clamshell dredges No. 54 and No. 55.
Approximately 3,000,000 cubic yards of material were removed from the project areas and placed in the Sarbanes Ecosystem Restoration Project on Poplar Island in Talbot County, Maryland. Dredged material was transported to the Poplar Island disposal facility by the Hydraulic Unloader No. 2. Project operations involved deepening the Craighill Channel to the required depth of 51 feet with a 2-foot overdepth and the Brewerton Extension to 36 feet + 1 feet. |
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| CANAVERAL PORT AUTHORITY |

| Location |
| | Cape Canaveral Harbor in Brevard County, Florida |
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| Client |
| | USACE - Jacksonville District |
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| Contract |
| | Dredge Type: Clamshell Dredge
Dredge: No. 55
Quantity: 540,000 cubic yards
Duration: May - September 2011
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| Description |
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This project involved the excavation of material from the sediment trap located at the west turning basin of Port Canaveral. Approximately 540,000 cubic yards of material were dredged from the basin by the clamshell dredge No. 55. This material was deposited both offshore for disposal and nearshore for use on a beach renourishment effort. Project operations included:
- Recovering upper level material for fill material
- Filling the Fishing Fleet Basin and stockpiling excess material
- Removing, salvaging and reinstalling the shoreline protection
- Adding new shoreline protection
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| COLUMBIA RIVER MAINTENANCE DREDGING |

| Location |
| | Columbia River - Astoria, Oregon
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| Client |
| | USACE - Portland District |
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| Contract |
| | Dredge Type: Trailing Suction Hopper Dredge
Dredge: Terrapin Island
Quantity: 4,400,000 cubic yards
Duration: August - October 2011
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| Description |
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This project involved dredging 4,400,000 cubic yards from lower Columbia River, the river's mouth, and the Coos Bay entrance. The dredged material was deposited in a deep water disposal site located roughly 4.5 nautical miles offshore from the MCR dredge areas. Project operations for this maintenance dredging were successfully completed in mid-October 2011 with the trailing suction hopper dredge Terrapin Island. |
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| NORTH COAST HOPPER DREDGING - WASHINGTON & OREGON |

| Client |
| | USACE - Portland District |
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| Contract |
| | Dredge Type: Trailing Suction Hopper Dredge
Dredge: Dodge Island
Quantity: 2,700,000 cubic yards
Duration: June-October 2010
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| Description |
| | GLDD dredged maintenance material from the mouth of the Columbia River and various points along the river. Project operations entailed strategically disposing 2,300,000 cubic yards of the dredged material in-water. In addition, 400,000 cubic yards of material were pumped upland to the Southwest Washington Littoral Drift zone, near the mouth of the River. |
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| NEW YORK HARBOR S-KVK-1 |

| Project |
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| Client |
| | USACE - New York District |
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| Role |
| | Prime contractor for deepening of the Kill Van Kull Channel |
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| Contract |
| | Duration: 950 Days
Years: 2008-2011
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| Description |
| | This project entailed mechanical dredging of 2,300,000 cubic yards of mud, sand, glacial till and solid rock within New York Harbor and Kill Van Kull Channel with disposal at five sites, including four artificial reefs within the Atlantic Ocean. |
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| BALTIMORE HARBOR MAINTENANCE DREDGING & UPLAND DISPOSAL |

| Project |
| | Baltimore Harbor Maintenance Dredging & Upland Disposal |
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| Client |
| | U.S. Army Corps of Engineers- Baltimore District |
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| Role |
| | Prime Contractor for dredging and upland disposal. |
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| Contract |
| | Dredge Type: Clamshell
Dredges: No. 54 & No. 55
Quantity: 3,300,000 cubic yards
Duration: February-April 2009
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| Description |
| | This project entailed the maintenance dredging and upland disposal of 3,300,000 cubic yards of shoaled material within the Chesapeake Bay and Baltimore Harbor. The clamshell dredges No. 54 and No. 55 were used to complete this project. |
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| PORT OF NEW YORK/ NEW JERSEY |

| Client |
| | USACE - New York District; Port Authority of New York/New Jersey |
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| Contract |
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| Description |
| | In 1980, the Corps of Engineers embarked on a phased program to deepen the entrance channels to the Port of New York/New Jersey from 35 feet to 40 feet, then to 45 feet, and eventually to 50 feet. In the execution of this work, Great Lakes has performed many key projects, becoming the dominant contractor in this sector of the market. The projects required the excavation of a full range of materials that included soft and stiff clays, red shale, serpentine rock, glacial till and granite. |
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| PORT OF WILMINGTON, NORTH CAROLINA |

| Client |
| | USACE- Wilmington District |
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| Contract |
| | Dredge Type: Cutter Suction Dredge
Quantity: 6,500,000 cubic yards
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| Description |
| | This project involved dredging and disposing of 6,500,000 cubic yards of new work material. In the first phase, the existing Baldhead Shoal Channel was relocated about 13,000 feet southeast of its prior mouth. The new channel deepened the existing seabed to a depth of -44 feet, with channel width varying from 720 feet to 500 feet. The approximate total contract area was 12,172,000 square feet.
The second phase involved deepening and widening the port's channel in the Cape Fear River from Keg Island to Lower Brunswick. Project operations entailed removing 2,200,000 cubic yards of silty sand and sand with a cutter suction dredge as well as drilling and blasting efforts for the removal of 340,000 cubic yards of limestone. This material was transported via barge to an ocean disposal site. |
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| PORT OF PROVIDENCE, RHODE ISLAND |

| Location |
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| Client |
| | USACE- New England District |
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| Contract |
| | Dredge Type: Clamshell Dredge
Dredge: No. 51, No. 55
Quantity: 2,627,000 cubic yards
Duration: 2003
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| Description |
| | This project involved maintenance and new work dredging to deepen Providence Harbor and the Providence River approach channel to a depth of 40 feet. In addition, Great Lakes constructed deep confined aquatic disposal (CAD) cells for containment of contaminated materials. The maintenance dredging was performed by clamshell dredges using environmental buckets, with barge overflow prohibited.
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Maintenance dredging with ocean disposal totaled 2,627,000 cubic yards.
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New work dredging entailed construction of deep CAD cells to accept 1,400,000 cubic yards of contaminated materials.
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Ocean disposal totaled 1,500,000 cubic yards, and upland disposal 215,000 cubic yards.
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Capping medium to cover contaminated materials placed in CAD cells totaled 257,500 cubic yards.
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| PORT OF RICHMOND, CALIFORNIA |

| Client |
| | USACE- San Francisco District |
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| Contract |
| | Dredge Type: Clamshell Dredge
Dredge: No. 53
Quantity: 2,877,500 cubic yards
Duration: 282 Days
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| Description |
| | This new work navigational improvement project involved deepening Richmond Harbor to a 38-foot depth. The new work dredging totaling 2,877,500 cubic yards were performed by clamshell dredges using environmental buckets, with offshore disposal at the San Francisco Ocean Disposal Site (SF-DODS). Tight environmental requirements applied with respect to the towing and disposal of dredged materials. Great Lakes made 470 disposal trips to the SF-DODS with no misplaced materials, far exceeding the performance record of any dredging contractor prior to or since this project. |
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| MIAMI HARBOR DEEPENING |

| Location |
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| Contract |
| | Dredge Type: Cutter Suction Dredge, Trailing Suction Hopper
Dredge, Clamshell Dredge and Drillboat
Dredges: Texas, Northerly Island, No. 54, Drillboat Apache
Quantity: 1,120,000 cubic yards
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| Description |
| | This project involved removing approximately 1,120,000 cubic yards of material from Fisherman Channel through the Lummus Turning Basin, creating a depth of 42 feet. The material was placed at the Ocean Dredged Material Disposal Sites. Additional work was apportioned in five options:
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Maintenance dredging of 210,000 cubic yards of shoal material from Cut 3 through the Main Turning Basin to a 42-foot depth.
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Construction dredging of 194,000 cubic yards of material from the berthing area adjacent to Fisherman Channel and Lummus Turning Basin to a 42-foot depth.
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Construction dredging of 5,000 cubic yards of material from the Dodge Island Cut berthing area to a 34-foot depth.
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Maintenance dredging of 22,000 cubic yards from Cuts 1 and 2.
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Maintenance dredging of 43,000 cubic yards from port berths adjacent to the main ship channel and Fisherman’s Channel.
A wide variety of equipment was employed in the project, including cutter suction, trailing suction hopper, and bucket dredges, drillboat(s), spider barge loaders, and material barges, as well as workboats, tugs, and numerous pieces of support plant.
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| BOSTON HARBOR NAVIGATION IMPROVEMENT PROJECT |

| Client |
| | USACE- New England Division |
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| Contract |
| | Dredge Type: Trailing Suction Hopper, Backhoe Dredge
and Clamshell Dredge
Dredges: Sugar Island, New York, No. 51, No. 53 and No. 54
Quantity: 200,000 cubic yards
Duration: August 1998 - February 2000
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| Description |
| | The chief purpose of the project was to increase navigational safety and efficiency and eliminate or greatly reduce delays for larger vessels by deepening the harbor's five principal tributaries from -35 feet to -40 feet. This involved removal and disposal of environmentally sensitive contaminated sediments not approved for off-shore disposal. Instead, large underwater disposal cells were excavated on the bottom of the harbor. Contaminated material was placed in these cells, then covered with a 3- to 5-foot thick capping layer of clean sand excavated from a simultaneous maintenance project in the Cape Cod Canal. Material removed from the cells was taken to the Massachusetts Bay Disposal Site. This was the first project of its kind to employ deep, in-channel disposal cells on such a scale. The company's resourceful management of the project earned a special quality award from the Federal Government. |
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| JACKSONVILLE HARBOR DEEPENING |

| Location |
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| Client |
| | USACE- Jacksonville District; Jacksonville Port Authority |
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| Contract |
| | Dredge Type: Cutter Suction Dredge
Dredge: Texas
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| Description |
| | Jacksonville's main shipping channel, a 23-mile stretch of the St. Johns River, extends from the river's mouth to the Jacksonville Port Authority's Talleyrand Marine Terminal near downtown Jacksonville. The Water Resources Development Act (WRDA) authorized the deepening of Jacksonville's harbor from its current depth of -38 feet to a depth of -40 feet (to -41 feet in areas of limestone rock bottom) from the mouth of the St. Johns River to Drummond Point. Dredging included deepening the west channel of JAXPORT's Blount Island Marine Terminal, taking the channel from -30 feet to -38 feet. |
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| PORT OF OAKLAND, BERTHS 55 AND 56 |

| Project |
| | Dredge & Landfill, Berths 55 and 56, Port of Oakland |
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| Client |
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| Role |
| | Subcontractor to General Construction Co.;
GLDD performed all cutterhead dredging and reclamation |
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| Contract |
| | Dredge Type: Cutter Suction Dredge
Dredge: Florida
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| Description |
| | This project was for the renovation of Berths 55 and 56 in the Oakland Inner Harbor Channel. The project entailed:
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Cutter suction dredging 1,100,000 cubic yards of stiff material
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Mechanical dredging 81,000 cubic yards of shoaled material and bay mud
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Stripping 540,000 cubic yards from surface areas with land equipment
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Hydraulic fill: In two lifts, first to 10 feet, then to 30 feet
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