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GREAT LAKES DREDGE & DOCK CORPORATION | DREDGING WORLDWIDE

The Eastern and Gulf seaboards of the United States are an immensely rich coastal resource approximately 45,000 miles in extent.* Much of this coastline is developed, with beachfront residences, state and national parks or resort properties. The East Coast faces the Atlantic Ocean, and is unprotected from the ravages of winter storms; both coasts are traversed by the world’s most active hurricane corridor. On average, eight to eleven tropical storms or nor’easters strike this area each year, causing dramatic beach erosion and property damage. Exacerbating the erosion caused by storms are jetties and breakwaters that redirect the natural flow of sand away from the shore, thus depriving beaches of a natural source of nourishment.

Faced with such erosion, property owners and local, state and federal governments confront a choice. They can allow the erosion to proceed unchecked or they can opt to restore the beaches to protect the infrastructure and assure the continued flow of revenues generated by the tourism industry.

Coastal engineers must always seek and identify sources of sand to be used in restoring eroded beaches; their task is to balance economics with the safety of such environmental resources as reefs, hard bottoms, and other habitats of aquatic animals and plants. Adding to that continually growing list of factors to consider is the safety of threatened or endangered species themselves: whales, manatees, turtles, and various species of birds and fish. Considering all these factors has resulted in modifying the methods of dredging and limiting construction to periods when the work can be accomplished with minimal environmental impact.

*Shoreline of outer coast, offshore islands, sounds, bays, rivers, and creeks is included to head of tidewater, or to point where tidal waters narrow to width of 100 feet.

SHORE PROTECTION & BEACH RESTORATION

Sculpting a Dune: The new beach at Ocean City, Maryland, featured an elaborate storm protection dune system complete with pedestrian pass-through facilities for public access and a variety of soil-retaining plant life.

To meet the requirements of this complex and challenging market, Great Lakes Dredge & Dock Company has assembled the largest fleet of diversified beach restoration equipment in the United States. Over the years the company has built new dredges, modified existing equipment, and invented solutions to comply with the ever-changing environmental restrictions imposed on the beach restoration market.

We operate an array of marine equipment designed and adapted to effectively manage the tasks and challenges of beach restoration. Ocean-certified hydraulic cutter suction dredges and trailing suction hopper dredges are traditionally the prime movers used to mine sand for restored beaches. They are augmented by such specialized ocean-certified equipment as: jack-up and floating booster pumps to aid in pumping sand through submerged and floating pipelines; the largest and most efficient

scows in the industry for transporting sand long distances; spider barges for efficient loading of scows; submerged pipelines modified to traverse sensitive environmental areas; and the most sensitive and specialized beach survey equipment available. All this equipment is designed and operated to both enhance production and assure the safety of Great Lakes’ workers, the marine environment, maritime traffic, and the public that frequents the beaches as they undergo restoration.

Of equal importance to this versatile fleet of equipment is the personnel who direct and operate it. Great Lakes’ experienced personnel recognize the need to solve problems as they arise in a manner that balances environmental and contractual concerns with the economics of the situation and the needs of the communities involved.

Most frequently, the location and character of the borrow area is the chief factor in determining what equipment to use. Generally, if the beach site is within 20,000 feet of the borrow area, then the most economical dredging method entails use of cutter suction dredges pumping material through pipelines. For more distant borrow areas, trailing suction hopper dredges mine the sand, sail to a hook-up point, and discharge the material through pipelines to the beach, sometimes using boosters to augment their power.

In some locations, environmental regulations preclude the use of hopper dredges and call for the loading of barges using cutter suction dredges and the use of hydraulic unloaders to pump the sand from barges to the beach. For every method, Great Lakes has a variety of equipment that can be used to accomplish these complex and demanding tasks.

When the material arrives at the shore, skill is needed to place it properly to assure appropriate settling and consolidation, and to shape any other features, such as protective dune systems. Great Lakes maintains a large fleet of specialized land equipment, operated by the most experienced workforce in the business, to meet these needs.

As technology presses forward with new equipment and techniques for managing material, Great Lakes is engaged in a constant search for improved methods. The company evaluates each project for the lessons it can teach, and is dedicated to advancing the efficiency and effectiveness of its work.

SELECTING EQUIPMENT

ALABAMA: Gulf Shore Beach

CALILFORNIA: San Diego Beaches

DELAWARE: South Bethany, Rehoboth Beach, Dewey Beach

FLORIDA: Boca Raton, Captiva Island Beach, Duval County/ Jackson ville Beaches, Fernandina Beach, Hollywood-Hallandale, John U. Lloyd Beach, Jupiter Inlet, Kings Bay Beach, Venice/ Sara so ta County, Anna Maria Key, Dade County/Miami Beaches, Jupiter Island, Long Key Beach, Pensacola Beach, Venice Beach, Hutchinson Beach, Palm Beach, Patrick AFB Beach, Sanibel Island, Hillsboro Beach, Panama City, Brevard County

GEORGIA: Tybee Island

MARYLAND: Ocean City

NORTH CAROLINA: Baldhead Island Beach, Wrightsville Beach, Carolina Beach, Kure Beach, Ocean Isle Beach, Pea Island NWR, Nags Head Beach

NEW JERSEY: Asbury Park Beach, Atlantic City Beach, Herefort Inlet, Ocean City, Cape May, City of Avalon, Great Egg Harbor/Peck Beach, Long Branch Beach, Sandy Hook Beach Monmouth Beach

NEW YORK: Fire Island Inlet, Rockaway Beach, Fire Island, Shinnecock Inlet, Westhampton Beach, Saltaire, Brookhaven, Islip, Jamaica Bay, Fire Island Pines, East Rockaway Beach

PENNSYLVANIA: Presque Isle Beach

PUERTO RICO: Arecibo Beach

SOUTH CAROLINA: Arcadian Shores Beach, Edisto Island Beach, Hunting Island Beach, Seabrook Island; Myrtle Beaches, Daufuskie Island, Hilton Head

VIRGINIA: Virginia Beach, Sandbridge Beach

WASHINGTON: Grays Harbor Beach

SELECT GLDD BEACH PROJECTS

Client: Town of Nags Head, North CarolinaQuantity: 4,600,000 cubic yardsDredge Types: Trailing Suction Hopper Dredge & Cutter Suction DredgeDredges: Liberty Island, Padre Island, Dodge Island & Texas

This large-scale beach renourishment project involved placing approximately 4,600,000 cubic yards of sand on a 10-mile stretch of Nags Head beach on the Outer Banks of North Carolina. Project operations were performed with the trailing suction hopper dredges Liberty Island, Padre Island and Dodge Island and the cutter suction dredge Illinois. Completed in October 2011, the renourishment widened Nags Head beachfront by approximately 50 feet to 150 feet with a berm elevation of +6 feet at peak height.

Client: USACE - Jacksonville DistrictQuantity: 735,000 cubic yardsDredge Type: Trailing Suction Hopper DredgeDredges: Dodge Island & Padre Island

This project involved a six-mile nourishment of Atlantic Beach, Neptune Beach and Jacksonville Beach in Duval County, Florida. Approximately 735,000 cubic yards of sand was dredged from a borrow site located about 6.7 nautical miles offshore and then pumped to the beaches. The hopper dredges Padre Island and Dodge Island were used to perform the nourishment and shoreline restoration work. Great Lakes completed the nourishment almost a month ahead of schedule in mid-August 2011 and just one week prior to Hurricane Irene. This project significantly helped protect the Duval County area against the hurricane and from suffering severe property damage.

Client: San Diego Association of GovernmentsQuantity: 2,000,000 cubic yardsDredge Type: Trailing Suction Hopper DredgeDredge: Sugar Island

The project required the placement of approximately 2 million cubic yards of sand dredged from six borrow areas at 12 discrete locations along 40 miles of coastline. The trailing suction hopper dredge Sugar Island was used to perform the project operations.

NAGS HEAD BEACH, NORTH CAROLINA

SAN DIEGO, CALIFORNIA BEACH RENOURISHMENT

DUVAL COUNTY BEACHES, FLORIDA

Client: USACE - Philadelphia DistrictQuantity: 900,000 cubic yardsDredge Type: Cutter Suction DredgeDredge: Illinois This project involved emergency coastline restoration work on New Jersey's Seven Mile Island in the communities of Avalon and Stone Harbor. Avalon and Stone Harbor partnered together in this nourishment effort to reconstruct the town's beaches after suffering coastline damage from the nor'easters storm in 2009. Approximately 900,000 cubic yards of sand was replaced on the Avalon and Stone Harbor beaches with cutter suction dredge Illinois.

Client: USACE - Jacksonville DistrictQuantity: 630,000 cubic yardsDredge Type: Cutter Suction DredgeDredge: Texas

For this sand bypass project, Great Lakes used the cutter suction dredge Texas to excavate a total of 630,000 cubic yards of sand from the two miles of beach north of the inlet and pumped it through submerged pipeline to the southern beaches, bypassing the inlet. The bypassed sand was placed along approximately two miles of the City of Cape Canaveral shoreline.

Client: Louisiana Department of Natural ResourcesDredge Type: Cutter Suction DredgeDredge: Alaska

The work divided into four main parts:• Stripping of silt overburden from the upper layer of the borrow

area for disposal via 35,000 feet of pipeline in an ‘in water’ disposal area.

• Dredging of silt for disposal via 50,000 feet of pipeline in a diked containment area for the creation of a low lying marsh area behind the restored beach.

• Dredging very fine silty sand from the under layer of the borrow area for disposal via up to 55,000 feet of pipeline for the creation of a new beach and hurricane protection bund

• Construction of training dikes, which was performed by a subcontractor.

PASS CHALAND SHORELINE RECLAMATION

BREVARD COUNTY BEACH RESTORATION PROJECT (CAPE CANAVERAL)

SEVEN MILE ISLAND BEACH RENOURISHMENT

HILLSBORO/DEERFIELD BEACH RENOURISHMENT

BOCA RATON BEACH RENOURISHMENT

NORTH CAROLINA BEACHES

Client: City of Boca Raton, FloridaQuantities: 750,000 cubic yards (North Beach) 160,000 cubic yards (South Beach)Dredge Type: Cutter Suction DredgeDredge: Texas

In March 2010, Great Lakes completed beach renourishment on North Beach and South Beach in Boca Raton, Florida. Project operations began on South Beach, moved to the North Beach, which required the placement of just over 750,000 cubic yards along the 1.45-mile project area. Upon completion of the North Beach section, the company remobilized to the South Beach area, and completed construction 10 days later, having placed approximately 160,000 cubic yards along that 0.9-mile length of beach.

Client: USACE - Wilmington DistrictQuantity: 2,600,000 cubic yardsDredge Types: Trailing Suction Hopper Dredge & Cutter Suction DredgeDredges: Liberty Island, Illinois & Texas This project called for dredging material from various inlets and offshore borrow areas and pumping it to local beaches. The project involved three different dredges and extensive mobilization efforts.

• Masonboro Island – 545,000 cubic yards• Wrightsville Beach – 450,000 cubic yards• Carolina Beach – 690,000 cubic yards• Kure Beach – 445,000 cubic yards• Ocean Isle Beach – 509,000 cubic yards

Client: Town of Hillsboro BeachQuantity: 375,000 cubic yardsDredge Type: Cutter Suction DredgeDredge: Illinois This project called for the renourishment of 6,000 linear feet of beach in the towns of Hillsboro and Deerfield Beach of Broward County, Florida. The cutter suction dredge Illinois was used to perform the nourishment work for this project. Approximately 375,000 cubic yards of dredged sand was pumped from a borrow site located about 1,170 feet offshore of Deerfield Beach onto the project placement areas.

ATLANTIC CITY & VENTNOR CITYBEACH RENOURISHMENT

HILTON HEAD ISLAND BEACH RENOURISHMENT

Client: USACE - Philadelphia DistrictQuantity: 1,800,000 cubic yardsDredge Type: Cutter Suction DredgeDredge: Illinois

This beach-fill project involved the construction of a berm and dune in order to reduce storm damages in the New Jersey communities of Atlantic City and Ventnor. The hydraulic dredge Illinois pumped approximately 1,400,000 cubic yards of sand onto Atlantic City Beach and replaced an additional 400,000 cubic yards of sand on Ventnor beach.

Client: Town of Hilton HeadQuantity: 1,000,000 cubic yardsDredge Type: Cutter Suction DredgeDredge: Alaska

This project involved the renourishment of 5,400 linear feet of beach on the northeast corner of Hilton Head Island. Approximately 1,000,000 cubic yards of sand was placed on the Hilton Head Island beachfront. The sand was dredged from the borrow area located approximately 16,000 feet from the fill area on the north side of Port Royal Sound. Project operations also included constructing a 700-foot long terminal groin at the northeastern end of the project area. The project was completed in January 2012 with the cutter suction dredge Alaska.

This complex four-year project involved construction of a multi-component shore protection system to maintain the separation of the fresh water Keta Lagoon and the sea:

• Construction of an 8.3-kilometer road/causeway between Keta and Hlorve, re-establishing a roadway lost to erosion.

• Sea defense works to limit further erosion by stabilizing the shoreline with a large revetment and six headland groynes, a feeder beach and beach nourishment placed between the groyne bays from Keta to Hlorve.

• Construction of a flood control structure to provide inhabitants around the lagoon with relief from extreme flooding conditions.

• Land reclamation from the lagoon in the area of Keta, Vodza and Kedzi, providing safe areas where housing and businesses could relocate free from the threat of encroaching sea waters.

KETA SHORE DEFENSE PROJECT, GHANA

Client: USACE - Savannah DistrictQuantity: 1,250,000 cubic yardsDredge Type: Cutter Suction DredgeDredge: Illinois

This beach renourishment project involved placing approximately 1,250,000 cubic yards of material along Tybee Island beaches in Georgia. Dredged material was pumped from a borrow site located approximately 1.5 miles offshore and placed onto the project areas. Project operations were performed by the cutter suction dredge Illinois.

Client: USACE - Baltimore DistrictDredge Type: Trailing Suction Hopper Dredge & Cutter Suction Dredge

This project entailed renourishment of a 200-foot-wide beach over an 8.3-mile stretch of shoreline, followed by the construction of a hurricane protection bund complete with pedestrian crossovers and grass plantings to stabilize the dune system.

• Dredging for Beachfill: 2,400,000 cubic yards by cutter suction and hopper dredge

• Dredging for Dunes: 3,600,000 cubic yards by cutter suction and hopper dredge

• Pumping Distances: Up to 43,000 feet

OCEAN CITY, MARYLAND

TYBEE ISLAND, GEORGIA BEACH RENOURISHMENT

Client: USACE - New YorkQuantity: 1,100,000 cubic yardsDredge Type: Cutter Suction DredgeDredge: Illinois

This project involved maintenance dredging of the Fire Island Inlet to the shallow depth of -16 feet with deposition of the dredged sand onto Gilgo Beach and Robert Moses State Park Beach.

• Dredging for Beach Fill: 1,000,000 cubic yards (Gilgo Beach); 100,000 cubic yards (Robert Moses Park Beach)

• Pumping Distances: Up to 30,000 feet

FIRE ISLAND, LONG ISLAND, NEW YORK

Client: USACE - New York DistrictQuantity: 700,000 cubic yardsDredge Type: Trailing Suction Hopper DredgeDredge: Liberty Island The project’s borrow area was situated close to shore on the exposed coastline of Long Island, New York. The dredge was required to mine material down to an elevation of 80 feet, hook up to an exposed pump out mooring, and pump up to 8,000 feet to renourish around 12,000 feet of beach.

Client: USACE - New Jersey DistrictQuantity: 2,100,000 cubic yardsDredge Type: Trailing Suction Hopper DredgeDredge: Liberty Island

This project involved dredging sand from offshore borrow areas for the replenishment of 4.8 miles of coastline, using the trailing suction hopper dredge Liberty Island. The project also included the construction of rock groynes.

ORCHARD BEACH, PELHAM BAY PARK, NEW YORK

Client: USACE - New York DistrictQuantities: 3,280 tons of stone and 254,200 cubic yards of beach fillDredge Type: Trailing Suction Hopper DredgeDredge: Padre Island This project involved beach restoration of approximately 5,400 linear feet of a crescent-shaped cove located in the Bronx, NY on City Island. The sand was dredged from a borrow area in Ambrose and then transported 35 miles (70 round trip) north through Hell's Gate to City Island.

MONMOUTH & SEABRIGHT BEACHES, NEW JERSEY

WEST HAMPTON BEACH RESTORATION PROJECT

Client: USACE - Jacksonville DistrictQuantity: 1.6 million cubic yardsDredge Type: Cutter Suction Dredge

Dredging of sand for beach renourishment from a distant shallow borrow area for bottom-dumping in a nearshore rehandling area for pumping upland using a cutter suction dredge.

• Dredging for Beachfill: 1,600,000 million cubic yards (Winter-spring work)

• Pumping Distances: Up to 12,000 feet

Client: USACE - Jacksonville DistrictDredge Type: Trailing Suction Hopper DredgeDredge: Liberty Island This project involved renourishment of 3.8 miles of shoreline in southern Brevard County. The material was mined from the Canaveral Shores Borrow area 24 nautical miles north of the placement site.

Client: USACE - Mobile DistrictQuantity: 1,300,000 cubic yardsDredge Type: Trailing Suction Hopper DredgeDredge: Liberty Island

This large-scale beach renourishment project involved seven miles of coastline restoration of Panama City Beach. The trailing suction hopper dredge Liberty Island dredged approximately 1,300,000 cubic yards of sand from a borrow area located about 3.5 miles offshore and pumped it onto the beachfront. At project completion in December 2011, the coastline had been extended by about 100 feet, providing added protection to the beach, local community and infrastructure.

BREVARD COUNTY, FLORIDA

BREVARD COUNTY SOUTH REACH, FLORIDA

PANAMA CITY BEACH RENOURISHMENT

2122 YORK ROAD, OAK BROOK, IL 60523 | 630.574.3000 | GLDD.COM

Client: USACE - Charleston DistrictQuantity: 3,000,000 cubic yardsDredge Type: Trailing Suction Hopper DredgeDredges: Padre Island & Dodge Island

This large beach renourishment project involved the placement of 3,000,000 cubic yards of sand on over 25 miles of beach across three communities:

• Garden City/Surfside – 750,000 cubic yards placed over 8 miles • Myrtle Beach – 1,500,000 cubic yards placed over 9 miles• North Myrtle Beach – 750,000 cubic yards placed over 8.5 miles

Extra work was added to the project, calling for 300,000 cubic yards of sand to be placed on the Arcadian Shores beachfront.

MYRTLE BEACH RENOURISHMENT