NAICS 212312: Crushed and Broken Limestone Mining and Quarrying
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).
- NAICS code
- 212312
- Title
- Crushed and Broken Limestone Mining and Quarrying
- Sector
- 21 Mining, Quarrying, and Oil and Gas Extraction
- Subsector
- 212 Mining (except Oil and Gas)
- Industry group
- 2123 Nonmetallic Mineral Mining and Quarrying
- NAICS industry
- 21231 Stone Mining and Quarrying
- SBA size standard
- 750 employees
- Open bids on BidRover
- 0
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Browse all open bidsFrequently asked questions
What is NAICS code 212312?
NAICS 212312 is "Crushed and Broken Limestone Mining and Quarrying" in the 2022 North American Industry Classification System, in sector 21 (Mining, Quarrying, and Oil and Gas Extraction). 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).
What is the SBA size standard for NAICS 212312?
A business is small under NAICS 212312 at or below 750 employees, including affiliates (13 CFR 121.201). Confirm the standard named in each solicitation.
How many government bids are open under NAICS 212312?
No open bid in BidRover cites NAICS 212312 right now. Many state and local notices do not list a NAICS code, so a keyword alert for this work catches more of them.
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Title and definition: U.S. Census Bureau, North American Industry Classification System (NAICS), 2022. Size standard: U.S. Small Business Administration, Small Business Size Standards, 13 CFR 121.201 (eCFR text as of Oct 21, 2026). Bid counts come from official public sources and refresh every hour; confirm the code and size standard in each solicitation.