# NAICS 212312: Crushed and Broken Limestone Mining and Quarrying

Breadcrumb: [NAICS codes](https://bidrover.com/naics) › [212312 Crushed and Broken Limestone Mining and Quarrying](https://bidrover.com/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).

- 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

## Open bids (0)

No open bids cite this code right now.

## Frequently 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.

### How do I get alerts for NAICS 212312 bids?

Save an alert on this page. A free account gets new matching bids by weekly email; the Team plan ($19/mo) sends daily alerts with match scores, the buyer, source link and documents.

## Related NAICS codes

- [327410 Lime Manufacturing](https://bidrover.com/naics/327410)
- [212319 Other Crushed and Broken Stone Mining and Quarrying](https://bidrover.com/naics/212319)
- [212311 Dimension Stone Mining and Quarrying](https://bidrover.com/naics/212311)
- [212313 Crushed and Broken Granite Mining and Quarrying](https://bidrover.com/naics/212313)
- [212321 Construction Sand and Gravel Mining](https://bidrover.com/naics/212321)
- [212322 Industrial Sand Mining](https://bidrover.com/naics/212322)
- [212323 Kaolin, Clay, and Ceramic and Refractory Minerals Mining](https://bidrover.com/naics/212323)
- [212390 Other Nonmetallic Mineral Mining and Quarrying](https://bidrover.com/naics/212390)

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Code titles and definitions: U.S. Census Bureau, North American Industry Classification System (NAICS), 2022 (https://www.census.gov/naics/). Size standards: U.S. Small Business Administration, Small Business Size Standards, 13 CFR 121.201, eCFR text current as of 2026-10-21 (https://www.ecfr.gov/current/title-13/section-121.201).

BidRover lists bids from official public sources. It is not an issuing authority; confirm the NAICS code and size standard named in each solicitation.