NASDI, founded in 1976 as North American Site Developers, Inc, is a major U.S. provider of commercial and industrial demolition services. NASDI's core business is exterior and interior demolition. Exterior demolition involves the complete dismantling and demolition of structures and foundations. Interior demolition involves removing specific structures within a building. Other business activities include site development and removal of asbestos and other hazardous material.

 

The company works primarily in the New England market, but has a presence in California, and has also completed projects in Michigan and New York. NASDI owns and operates specialized demolition equipment, including a fleet of excavators equipped with shears, pulverizers, processors, grapples, and hydraulic hammers that provide high-capacity processing of construction and demolition debris for recycling and reclamation.

 

 

 

 

 

L.W. Matteson, Inc. has been in the Marine Construction and Dredging industries since 1973, and is now part of Great Lakes Dredge & Dock Company's Rivers and Lakes Division. Matteson's experienced personnel, combined with a large and diversified fleet of equipment, enhances GLDD's presence and capabilities in the inland waterway market.

Based in Burlington, Iowa on the Mississippi River, the Rivers & Lakes Division, L.W. Matteson, Inc. maintains one of the largest fleets of dredging and marine construction equipment on the inland river system. The Rivers & Lakes Division fleet consists of nine dredges, thirteen tugboats, seventeen barges, twenty pieces of earth moving equipment, and a host of other support equipment. A large portion of the equipment fleet is designed to operate in the challenging environment of the upper Midwestern river basins. This equipment operates in shallow draft environments and is portable, allowing it to be deployed into lakes and non-navigable pools or waterways.

 

 

 

 

 

 

 

Terra Contracting Services, LLC is one of the nation’s premier providers of a wide variety of essential services for environmental, maintenance and infrastructure-related applications. The Company’s remediation, maintenance/repair, abatement and emergency response services provide corporate and governmental customers with one of the industry’s broadest arrays of project-critical environmental solutions. Terra has earned a reputation for excellence in a wide range of environmental services, including the removal and remediation of contaminated sediment, soil and groundwater, superfund clean-up, hazardous waste removal, brownfield site restoration, landfill management, and erosion control.

 

 

 

 

 

 

 

 

Amboy mines sand from the entrance channel to New York Harbor and markets sand and aggregate for road and building construction. Great Lakes' dredging expertise and its partner's knowledge of the aggregate market formed the basis for the joint venture. Amboy is the only East Coast aggregate producer to mine sand from the ocean floor.

 

In 1988, Amboy built the Sandy Hook, a specially designed dredge for sand mining, de-watering and dry delivery, the only one of its kind in the United States. Amboy's ocean-based supply of sand provides a long-term competitive advantage in the Northeast, as land-based sand deposits are depleted or rendered less cost competitive by escalating land values.

 

 

 

Founded in 1989, Yankee Environmental Services is a provider of environmental remediation and facility services to private and government entities including schools, universities, hospitals and other businesses throughout the New England area. From lead paint and asbestos abatement to complete demolition, Yankee has worked with some of the largest companies in the region on their facility and construction service needs. Yankee has previously been a subcontractor on many NASDI projects.

 

The acquisition of Yankee in 2009 provides an avenue to diversify the Company's demolition business to include abatement capabilities and make NASDI more competitive on jobs requiring these services. Yankee operates within the demolition segment.

 

 

 

 

 

Founded in 1998, New York Sand & Stone is one of the larger suppliers of construction materials in the New York City market. With locations at the Brooklyn Navy Yard and Sunset Park, New York Sand & Stone supplies crushed stone, sand, base coarse aggregate, dense graded aggregate, gabion and rip rap, as well as an asphalt millings disposal service for contractors and municipalities in the New York City area. GLDD has an interest in NYS&S through its joint venture partnership in Amboy Aggregates.