Boulder / Rip Rap
Heavy armor rock engineered for shoreline protection, breakwaters, erosion control, and large-scale civil works.
M.G.R.A. Limestone
An 850-acre limestone reserve in Westmoreland Parish, Jamaica, supplying high-specification crushed stone, manufactured sand, and armor rock for heavy infrastructure, civil construction, and industrial manufacturing.
Sustainable, High-Yield Mineral Extraction in the Caribbean
M.G.R.A. operates an expansive 850-acre limestone reserve in Westmoreland Parish, Jamaica, supplying commercial, industrial, and government clients across the Americas. Family-owned and operated, the company provides a secure, consistent, and quality-controlled material supply backed by modern processing infrastructure and deep cross-industry operational leadership.
Core Products
Crushed Stone (-3/4")
High-durability angular aggregate graded for asphalt mixes, structural concrete, and road base construction.
Gravel / Chips (3/16" to 3/8")
Precision-screened aggregate chips for specialized precast, asphalt surface courses, and high-performance drainage applications.
Manufactured Concrete Sand (ASTM C-33 | -3/16" + #200)
Clean, high-performance fine aggregate strictly manufactured to meet ASTM C33 specifications for structural concrete and civil applications.
Block Sand (-3/8")
Uniformly graded aggregate sand tailored for concrete block manufacturing and masonry structural units.
Rendering Sand / Fine Powder (-#14 / 1.5mm)
Ultra-fine, consistent material optimized for plastering, interior/exterior rendering, and specialized industrial mixes.
Capabilities
Processing Capacity & Plant
Powered by an advanced, dry-process aggregate plant with a production capacity of up to 400 TPH (tons per hour), driven by high-efficiency hybrid Cummins diesel/electric genset systems.
Equipment & Fleet
- Primary Crushing: Taurian Terra Track 300J Mobile Jaw Crusher (32" x 44")
- Secondary/Tertiary Impact: Terra Track i-130 RS 5048 Impactor on Ti-1110W / 250 kW Wheeled Chassis
- Classification & Sizing: Terra Track 1662 3D Vibrating Screen (5' x 20' triple deck) and 2D HYPER Frequency Fine Screening Unit (6' x 18' double deck)
Quality Control
Multi-stage dry vibrating and high-frequency classification ensuring strict particle size distribution, zero-moisture dry-process consistency, and continuous gradation monitoring.
Leadership Experience
Leadership collectively brings 45–50 years of experience in heavy industry, spanning equipment operation and maintenance, process transformation, and operations management.
Quality & Testing
Chemical composition is verified per ASTM C25 chemical assay analysis; physical, sieve, and gradation testing is certified to ASTM C33 standards to meet stringent domestic and international export specifications.
Leadership
Julio Graham
Chief Executive Officer
Leads M.G.R.A.'s operations with a focus on modernizing production processes and strengthening operational capacity.
Devonte Little
Chief Operating Officer
Oversees day-to-day operations, bringing industrial machinery and operations experience to material handling and safety practices.
CJ Middleton
Director of Special Projects
Leads operational and digital transformation initiatives, with a background across Fortune 500 industrial environments and hazmat logistics.