Supreme Manufacturing

What Supreme Manufacturing does

Supreme Manufacturing LLC, founded in 1990 and headquartered in Stoneboro, Pennsylvania, is a custom designer and builder of industrial equipment with its core competency in floating clamshell dredges used for underwater sand, gravel, and mineral extraction. The company's product portfolio spans Gantry, Twin Gantry, Tilting Boom, and Catamaran dredge configurations with bucket sizes from 4 to 20 cubic yards and production capacities from 300 to more than 2,500 tons per hour, complemented by floating conveyors (24-60 inch, 100-400 feet), overland and radial stacking conveyors, clamshell buckets, rock barges up to 110-ton payload, work boats, and custom fabrication of bins, feeders, silos, hoppers, and storage tanks. Differentiated technical features include onboard primary-stage crushing and dewatering, all-electric operation, depth capability exceeding 200 feet (with some machines at 300+ feet), and a "one machine/one operator" architecture that replaces conventional four-machine/four-operator setups at mining costs reported as low as $0.46 per ton.

The company sells primarily through direct enterprise field sales to aggregate producers, mining operations, construction materials firms, and industrial manufacturers, with project-based quotation, site visits, and on-site assembly services. Customers include Calportland, Barrett Paving Materials, Dakota Aggregates, Edward C. Levy, United Rock Products, Central Allied Enterprises, Coram Materials, Watson Gravel, and Jaymar, with projects spanning Ohio, Minnesota, Oregon, New York, Michigan, and California, plus claimed global shipping capability. Revenue streams are one-time capital-equipment sales (dredges, conveyors, accessories), custom fabrication, and professional services (assembly, refurbishing, line boring, hard facing).

In June 2024, ownership transferred to the owners of LJ Inc. (Swartz Creek, Michigan), with the company reincorporating as an LLC and forming a strategic affiliate relationship that bundles Supreme's dredge manufacturing with LJ Inc.'s electrical, automation, fabrication, millwright, and HVAC turnkey capabilities. The company remains privately held, operates from a single 7.15-acre, 33,000+ square foot facility, employs 11-50 people, and has no disclosed venture capital, private equity, or institutional investment.

Name

Supreme Manufacturing

Legal name

Supreme Manufacturing LLC

Website

https://suprememfg.net

Company type

Private

Founded year

1990

Operating status

Operating

Headcount range

11–50 employees

Short description

Supreme Manufacturing is a custom designer and builder of floating clamshell dredges, conveyor systems, storage tanks, and hoppers, serving aggregate producers, mining operators, and construction materials firms in the US and globally from its Stoneboro, Pennsylvania facility.

Ownership category

akta.pro rank

Product category

Mining and Dredging Equipment Manufacturing

NAICS

Mining Machinery and Equipment Manufacturing (333131), Conveyor and Conveying Equipment Manufacturing (333922), Material Handling Equipment Manufacturing (33392)

SIC

Construction, Mining & Materials Handling Machinery & Equip (3530), Special Industry Machinery (No Metalworking Machinery) (3550)

akta.pro primary industry

Surface Mining Equipment (Excavators, Shovels, Draglines, Dozers) (IMAKANAA)

akta.pro secondary industries

Conveying, Hoisting & Materials Handling Systems (Conveyors, Stackers/Reclaimers, Winches) (IMAKANAE), Bulk Material Handling Systems (Belt Conveyors, Feeders, Stackers, Reclaimers) (IMAHABAH), Attachments & Work Tools (Buckets, Augers, Hammers) (IMAHAAAM)

Keywords

• Clamshell dredge manufacturing
• Floating conveyor systems
• Aggregate mining equipment
• Material handling equipment
• Dredging equipment fabrication

Headquarters

HQ city

Stoneboro

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Supply Chain, Operations, Personnel, Technology or R&D, Marketing or Sales, Infrastructure

Revenue model

1. Custom Dredge Manufacturing: Design and manufacture of custom floating clamshell dredges for underwater mining operations. Dredges are available in multiple configurations including gantry, tilting boom, twin gantry, and catamaran types, with bucket sizes ranging from 4 to 20 cubic yards. Production capacity ranges from 300 TPH to 2,500+ TPH depending on configuration.
2. Dredge Accessories and Components: Sale of clamshell buckets, rock barges, work boats, and other ancillary dredge equipment. Buckets feature heavy-duty spade nose design, AR 400 shells, and electric motor options (75, 125, or 150 HP). Rock barges offer up to 110-ton payload capacity.
3. Conveyor Systems: Design and fabrication of floating conveyors (24" to 60" sizes, 100' to 400' lengths), overland conveyors, monorail and radial stacking conveyors, and specialized conveyors for various material handling applications.
4. Custom Fabrication Services: Design and fabrication of bins, feeders, silos, support structures, storage tanks, hoppers, and specialized equipment for various industries including sand and gravel, mining, and material processing.
5. Equipment Refurbishing Services: Refurbishing services for existing equipment including line boring, hard facing, complete rebuilding, sand blasting, painting, and general refurbishing. Services can be performed on-site or at the company's facility.
6. Assembly Services: Onsite assembly of newly-built machines and extensive refurbishing/reworking of existing equipment for sand, gravel, and mining industries. Services include turnkey installation and operator training.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels3 records

Core offering

Supreme Manufacturing is a custom designer and builder of high quality clamshell dredges, conveyor systems, storage tanks, and hoppers, plus a wide variety of specialized equipment for sand and gravel, mining, construction aggregates, and material handling industries. The company fabricates floating clamshell dredges in multiple configurations (Gantry, Twin Gantry, Tilting Boom, Catamaran) with bucket sizes ranging from 5 to 20 cubic yards and digging depths exceeding 200 feet, alongside floating conveyors, overland conveyors, rock barges, work boats, custom buckets, processing plants, and on-site assembly and refurbishing services.

Product overview

Supreme Manufacturing is a custom designer and builder of clamshell dredges and specialized industrial equipment. The product portfolio centers on floating clamshell dredges available in multiple configurations (Tilting Boom, Gantry, Twin Gantry, and Catamaran types) with bucket sizes ranging from 5 to 20 cubic yards. Core products are complemented by a comprehensive accessory line including clamshell buckets with heavy-duty AR 400 shells, rock barges with 110-ton payload capacity, and work boats. The company also manufactures complete conveyor systems including floating conveyors (24-60 inch sizes, 100-400 foot lengths), overland conveyors, monorail and radial stacking conveyors, and specialized conveyors for custom applications. Service offerings include processing plant design and customization, custom fabrication (bins, feeders, silos, support structures), on-site assembly services, and equipment refurbishing (line boring, hard facing, rebuilding, sand blasting, painting). The company operates from a single facility in Stoneboro, Pennsylvania, serving industries including sand and gravel, mining, construction aggregates, and material handling worldwide.

Differentiator

Problem solved

Functional benefit

Products and services

• Clamshell Dredges Custom floating clamshell dredges designed for deep-water mining operations, capable of digging to depths greater than 200 feet with onboard processing (primary-stage crushing and dewatering). Available in Gantry, Twin Gantry, Tilting Boom, and Catamaran configurations for sand and gravel producers, mining operators, and aggregate producers.
• Clamshell Buckets Heavy-duty spade nose buckets for deeper penetration in hard material with flared shell design for better clearance. Manufactured from AR 400 shells with severe-duty hydraulic units using environmentally-friendly hydraulic fluid, available with 75, 125, or 150 horsepower electric motors for aggregate and mining dredging operations.
• Rock Barges Belly-dump barges heavy duty enough to haul payloads up to 110 tons, with 3/4 inch AR plate on impact walls and 1/2 inch plate pontoon top deck, hydraulic dump cylinders, hydraulic tunnel thrusters, and 100 horsepower diesel engine; able to spin 180 degrees within its own length for overburden movement and material transport.
• Work Boats Marine work boats featuring rubber bumpers around edges, 3/16 inch plate hull, seat flotation, motor guard bail, angle skid runners on bottom, and pipe top rail for supporting dredging operations on lakes, rivers, and aggregate extraction sites.
• Floating Conveyors Floating conveyors used to transport dredged material from floating clamshell dredge to shore, available in sizes from 24 to 60 inches and lengths from 100 to 400 feet. All conveyor trusses, head and tail sections are galvanized with marine-grade epoxy painted steel floatation.
• Overland Conveyors Overland conveyor systems designed to move large amounts of material over distance, dramatically reducing handling operations and production costs. Configurations include high-temperature belt to chain mesh belt options for aggregate, mining, and material handling customers.
• Monorail and Radial Stacking Conveyors Radial stacking conveyors with monorail system for efficient use of storage space, available with manual or powered travel and manual or powered variable height adjustment to support aggregate stockpile management.
• Specialized Conveyors Custom conveyors for specialized applications, including cover units for keeping materials dry and contained, and heavy-duty high-impact units for large materials. Built to customer specifications for material handling and processing operations.
• Custom Fabrication Services Design and fabrication of equipment including bins, feeders, silos, support structures, storage tanks, and hoppers. Specializes in custom equipment for storing, conveying, loading, and dredging applications across sand and gravel, mining, steel, cement, and agriculture industries.
• Processing Plants Complete plant customization services including design and fabrication of complete processing systems for sand, gravel, and mining operations. Configured to meet customer-specific production, material flow, and layout requirements.
• Assembly Services On-site assembly of newly-built machines plus extensive refurbishing and reworking of existing equipment for the sand, gravel, and mining industries. Provides turnkey service with fully operational equipment upon completion, including operator training.
• Equipment Refurbishing Comprehensive refurbishing services including line boring, hard facing, complete rebuilding, sand blasting, painting, and general refurbishing. Available on-site at customer facilities or at Supreme's Stoneboro, Pennsylvania shop.

Quantifiable outcome

• Replaces 4 machines and 4 operators with 1 machine and 1 operator
• +5 more outcomes

Named customers11 records

Segments4 records

Ideal customer profiles2 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature6 records

Partnerships

One partnership is on record.

• LJ InccoreOthersLJ Inc is a subsidiary company of the same ownership group that acquired Supreme Manufacturing in June 2024. LJ Inc is a family-owned and operated company providing industrial, commercial, and residential turn-key solutions including electrical work, automation, IT, fabrication, pipe fitting, millwright services, and HVAC. The partnership pools together the experience, knowledge, and expertise of both teams to enhance the end product for clients.

Scale indicators7 records

Recent moves7 records

Expansion highlights5 records

Direct peers

• Ellicott Dredges: Ellicott Dredges is one of the largest U.S. manufacturers of dredging equipment, including clamshell, cutterhead, and bucketwheel dredges. Direct peer to Supreme because it builds custom dredges with similar onboard processing capabilities for sand & gravel, mining, and marine construction operators.
• DSC Dredge: DSC Dredge manufactures custom dredging equipment (cutterhead and clamshell) used in aggregate mining, inland waterways, and environmental remediation. Directly comparable to Supreme in equipment category, customer overlap (aggregate operators), and custom-engineering business model.
• Superior Industries: Superior Industries designs and manufactures conveying, screening, washing, and material handling equipment used across aggregate, mining, and recycling operations. Directly comparable for Supreme's conveyor and bulk material handling systems business, serving overlapping aggregate customers.
• McLanahan Corporation: McLanahan builds processing equipment (washing, screening, crushing, material handling) for aggregate, mineral, and mining producers. Closely comparable for Supreme's crushing, dewatering, and material handling systems sold to sand & gravel operators.

Broad incumbents

• IHC Dredging: IHC (Royal IHC) is the world's largest dedicated dredging and maritime equipment manufacturer, primarily serving large-scale marine infrastructure and offshore projects. Broad incumbent that competes for the largest dredging contracts Supreme also targets, though at substantially larger scale and project size.
• KPI-JCI / Astec Industries: KPI-JCI (an Astec Industries company) manufactures crushing, screening, conveying, and material handling equipment for aggregate producers. Broad incumbent that overlaps with Supreme on the conveyor and material handling side, offering more standardized product lines to similar aggregate customers.
• Metso: Metso is a major global supplier of mining and aggregates processing equipment, including crushing, screening, conveying, and dewatering systems. Comparable as a broad incumbent offering overlapping crushing, dewatering, and conveyor technologies to aggregate operators.
• Terex Corporation: Terex manufactures a broad portfolio of construction, mining, and material handling equipment for infrastructure and aggregate markets. Comparable as a broad incumbent whose conveying, washing, and mobile processing lines serve many of Supreme's same aggregate customers.
• Sandvik: Sandvik's Mining & Rock Solutions division supplies drilling, crushing, screening, and material handling equipment to mining and aggregate customers globally. Comparable as a broad incumbent with overlapping material processing and conveying products to similar operator end-users.
• Weir Group (Mining): Weir Group's mining division supplies pumps, dewatering systems, and material handling equipment to mining and aggregate operators. Broad incumbent with comparable dewatering and material handling focus, although at much larger scale and broader product portfolio.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks5 records

Key highlights7 records

Customer concentration

Revenue estimate

Valuation estimate

Number of profiles

Profiles2 records

Subsidiaries1 record

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Supreme Manufacturing