Founded in 1990, Supreme Manufacturing LLC builds custom floating clamshell dredges and over-water material-handling equipment from its Stoneboro, Pennsylvania facility. The company began with conveyors, hoppers and feeders before selling its first American-designed and made clamshell dredge in 1999, and it now pairs dredge manufacturing with fabrication, assembly and equipment refurbishment. Supreme operates on a 7.15-acre campus with three buildings totaling more than 33,000 square feet and changed ownership in June 2024, joining the experience of the LJ Inc. team with its own.
Ellicott Dredges, LLCSince 1885, Ellicott Dredges has built American-made portable cutter suction dredges and other dredging vessels for demanding marine and land projects. The Baltimore manufacturer designs and makes key proprietary components, including its pumps and cutterheads, in-house, and many of its dredges remain in service after 50 years. Ellicott equipment has operated in more than 100 countries, supporting work from port maintenance and sand mining to reclamation and environmental restoration.BALTIMORE, MD
Custom Built Manufacturing LLCFounded in Kane, Pennsylvania, in 2006 by Derek Dangelo, Custom Built Manufacturing LLC makes American-made heavy-duty wreckers and towing equipment. The family business is now co-owned by Derek and his son Nick, and manufactures integrated and rotator wreckers at its Kane facility, where it performs much of the fabrication and assembly in-house.KANE, PA
Interstate Equipment CorporationInterstate Equipment Corporation designs, engineers, and constructs barge-handling and bulk-material conveyance equipment, with roots in a patented continuous aerial tramway design for mining operations. The Pittsburgh company has operated continuously since 1903 and is a third-generation, family-owned and operated business. Its engineered systems are used at inland river and port facilities, as well as in mining and other bulk-material industries.PITTSBURGH, PA
Handling SpecialtyEstablished in 1963, Handling Specialty designs and manufactures custom material-handling equipment and complete systems for demanding applications worldwide. The Grimsby, Ontario company operates two nearby facilities totaling 140,000 square feet, with its Hamilton plant equipped for oversized builds and large-scale testing. Its work spans unusual assignments from rail gantries and steel-mill equipment to underwater stage lifts, backed by in-house engineering, manufacturing, installation and service.PITTSBURGH, PA