NAICS 212312 - Crushed and Broken Limestone Mining and Quarrying
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What is NAICS 212312
NAICS code 212312 covers establishments primarily engaged in mining and quarrying crushed and broken limestone, including related rocks such as dolomite, cement rock, marl, travertine, and calcareous tufa. This industry includes both the extraction of these materials from mine sites and preparation plants that beneficiate limestone by grinding or pulverizing. Businesses operating in this sector range from small quarry operators to large-scale mining companies that supply raw materials critical for construction, agriculture, and industrial applications. Government contracts in this sector often support infrastructure projects, military construction, and environmental remediation efforts where high-quality limestone is required as a base material or aggregate.
Government agencies contract for these services to ensure a reliable supply of crushed limestone for road building, concrete production, soil stabilization, and other public works projects. The durability and versatility of limestone make it an essential commodity for federal, state, and local infrastructure development and maintenance programs. Contracting with specialized mining and quarrying businesses ensures compliance with environmental standards and efficient resource extraction, which are priorities for government procurement.
Government agencies contract for these services to ensure a reliable supply of crushed limestone for road building, concrete production, soil stabilization, and other public works projects. The durability and versatility of limestone make it an essential commodity for federal, state, and local infrastructure development and maintenance programs. Contracting with specialized mining and quarrying businesses ensures compliance with environmental standards and efficient resource extraction, which are priorities for government procurement.
Industry Classification for NAICS 212312
This U.S. industry comprises (1) establishments primarily engaged in developing the mine site, mining or quarrying crushed and broken limestone (including related rocks, such as dolomite, cement rock, marl, travertine, and calcareous tufa) and (2) preparation plants primarily engaged in beneficiating limestone (e.g., grinding or pulverizing).
Breakdown for NAICS 212312
- Includes establishments mining and quarrying crushed and broken limestone and related rocks.
- Covers preparation plants that beneficiate limestone through grinding or pulverizing.
- Supplies essential raw materials for construction, agriculture, and industrial uses.
- Typical small to large-scale operations with environmental compliance requirements.
- Supports infrastructure, military, and environmental government projects.
Included Activities for NAICS 212312
- Mining and quarrying crushed and broken limestone.
- Operating beneficiation plants to grind or pulverize limestone.
- Extracting related rocks such as dolomite and marl.
- Supplying crushed limestone for construction aggregates.
- Performing environmental reclamation using limestone materials.
- Providing raw materials for cement production.
- Transporting limestone to government project sites.
- Ensuring compliance with mining and environmental regulations.
Business Types for NAICS 212312
- Limestone mining companies
- Quarry operators
- Beneficiation and processing plants
- Construction material suppliers
- Environmental reclamation contractors
- Small and medium-sized mining enterprises
Subcategories for NAICS 212312
- Agricultural limestone mining and/or beneficiating
- Calcareous tufa crushed and broken stone mining and/or beneficiating
- Cement rock crushed and broken stone mining and/or beneficiating
- Chalk crushed and broken stone mining and/or beneficiating
- Chalk, ground or otherwise treated, mining and/or beneficiating
- Dolomite crushed and broken stone mining and/or beneficiating
- Lime rock, ground, mining and/or beneficiating
- Limestone (except bituminous) crushed and broken stone mining and/or beneficiating
- Limestone beneficiating plants (e.g., grinding or pulverizing)
- Marl crushed and broken stone mining and/or beneficiating
- Riprap, limestone, mining or quarrying
- Riprap, limestone, preparation plants
- Travertine crushed and broken stone mining and/or beneficiating
- Tufa, calcareous, crushed and broken stone, mining and/or beneficiating
- Whiting crushed and broken stone, mining and/or beneficiating
Government Buyers for NAICS 212312
Federal agencies such as the Department of Transportation, the Army Corps of Engineers, the Department of Defense, and state and local public works departments are primary buyers of crushed and broken limestone. These agencies require limestone for projects including highway construction, runway development, military base infrastructure, and water treatment facilities. Limestone's role as a fundamental construction aggregate makes it critical for government-funded infrastructure programs and disaster recovery efforts. Additionally, agencies involved in environmental conservation and land reclamation may procure these materials for soil conditioning and erosion control.
Contract Types & Procurement for NAICS 212312
Contracts for NAICS 212312 typically include firm-fixed-price and indefinite delivery/indefinite quantity (IDIQ) contracts. Procurement methods often involve competitive bidding processes due to the commodity nature of limestone and the need for cost efficiency. Contract values vary widely depending on project scale, ranging from tens of thousands to several million dollars for large infrastructure projects. Blanket purchase agreements (BPAs) and long-term supply contracts are common to ensure continuous availability of crushed limestone for ongoing government construction programs. Small businesses in this sector may participate in set-aside contracts aimed at supporting local economies.
Details for NAICS 212312
Explore the hierarchy and related codes for this industry
| NAICS Code | Industry Title |
|---|---|
| 21231 | Stone Mining and Quarrying |
| 2123 | Nonmetallic Mineral Mining and Quarrying |
| 212 | Mining (except Oil and Gas) |
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