NAICS Code 212312: Crushed and Broken Limestone Mining and Quarrying
National industry
SBA small business size standard: 750 employees
Definition
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).
Government contracts for this product: PSC 5610 Mineral Construction Materials, Bulk
Code facts
- Part of
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21
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212
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2123
- 21231
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2123
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212
-
21
- Contract awards
- 69 In the last 12 months
- Contract obligations
- $27,283,494 In FY2025
NAICS codes and definitions come from the U.S. Census Bureau, size standards from the SBA and contract spending from SAM.gov/FPDS.
Business activities under 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
Looking for another activity? Search the NAICS code lookup or browse business activities from A to Z.
Contract obligations by fiscal year
| Fiscal year | Obligated |
|---|---|
| FY2027 To date | $5,000 |
| FY2026 | $17,244,362 |
| FY2025 | $27,283,494 |
| FY2024 | $13,055,378 |
| FY2023 | $10,213,901 |
Top contractors by obligations
| Rank | Contractor | Obligated, FY2026–FY2027 | Share |
|---|---|---|---|
| 1 | FPA Pacific Corp. | $11,072,965 | |
| 2 | Tarpan Construction, LLC | $1,183,236 | |
| 3 | Willard Quarries, Inc. | $824,733 | |
| 4 | Giving Tree Capital, LLC | $695,211 | |
| 5 | American Classic Construction Inc. | $610,988 | |
| 6 | Crowley Holdings LLC | $529,483 | |
| 7 | New Enterprise Stone & Lime Co Inc. | $455,524 | |
| 8 | Grarok LLC | $406,350 | |
| 9 | Knife River Corporation - North Central | $385,725 | |
| 10 | Lineport Excavating, LLC | $317,981 |
See the full FY2025 ranking of NAICS 212312 contractors, by parent company.
Top funding agencies by obligations
| Rank | Agency | Obligated, FY2026–FY2027 | Share |
|---|---|---|---|
| 1 | Air Force | $11,351,587 | |
| 2 | Department of the Army | $4,036,183 | |
| 3 | Department of the Interior | $1,493,334 | |
| 4 | Department of Agriculture | $228,669 | |
| 5 | Department of the Navy | $139,589 |
Top PSC codes by obligations
| Rank | PSC code | Obligated, FY2026–FY2027 | Share |
|---|---|---|---|
| 1 | 5610 Mineral Construction Materials, Bulk | $12,910,737 | |
| 2 | 5680 Miscellaneous Construction Materials | $4,248,246 | |
| 3 |
Z1LB Maintenance of Highways/ |
$50,000 | |
| 4 | 6810 Chemicals | $40,379 |
Contract obligations by state
| Rank | Place of performance | Obligated, last 12 months | Share |
|---|---|---|---|
| 1 | Northern Mariana Islands | $11,072,965 | |
| 2 | Mississippi | $1,491,643 | |
| 3 | Missouri | $977,477 | |
| 4 | Florida | $599,530 | |
| 5 | Pennsylvania | $506,484 | |
| 6 | New York | $406,350 | |
| 7 | Minnesota | $385,725 | |
| 8 | Kentucky | $367,981 | |
| 9 | Wisconsin | $288,227 | |
| 10 | Washington | $199,474 | |
| 11 | West Virginia | $177,324 | |
| 12 | Texas | $170,006 | |
| 13 | Ohio | $136,189 | |
| 14 | Louisiana | $125,391 | |
| 15 | Arkansas | $67,138 | |
| 16 | Virginia | $60,000 | |
| 17 | Tennessee | $47,880 | |
| 18 | Georgia | $34,750 | |
| 19 | Oklahoma | $29,676 | |
| 20 | California | $29,295 | |
| 21 | Utah | $22,338 | |
| 22 | Illinois | $11,844 | |
| 23 | Indiana | $126 |
Show all 23
Shares are of everything obligated under NAICS 212312 in the last 12 months before deobligations, including work performed abroad or with no place of performance on record.
Contract opportunities
Show 40 more
Latest 50 of 768 listed here. See the rest on GovTribe.
Size standard history
Federal Register rules that named this code
From the NAICS codes each rule's amendments to 13 CFR 121.201 name. Rules that print their size standard tables as images aren't listed.
Quick answers
What is NAICS 212312?
NAICS 212312 is Crushed and Broken Limestone Mining and Quarrying, a national industry in NAICS 21, Mining, Quarrying, and Oil and Gas Extraction.
What is the NAICS code for agricultural limestone mining and/or beneficiating?
The NAICS code for agricultural limestone mining and/
What is the NAICS code for marl crushed and broken stone mining and/or beneficiating?
The NAICS code for marl crushed and broken stone mining and/
What is the NAICS code for chalk crushed and broken stone mining and/or beneficiating?
The NAICS code for chalk crushed and broken stone mining and/
When did the size standard for NAICS 212312 last change?
The most recent Federal Register rule on record that names NAICS 212312 in the SBA's size standards is "Small Business Size Standards: Industries With Employee Based Size Standards Not Part of Manufacturing, Wholesale Trade, or Retail Trade" (81 FR 4436), published Jan 26, 2016 and effective Feb 26, 2016.
How much do federal agencies spend under NAICS 212312?
Federal contracts under NAICS 212312 obligated $27,283,494 in fiscal year 2025 and $67,802,135 in fiscal years 2023 through 2027.
Who are the largest contractors under NAICS 212312?
The contractors with the most obligated under NAICS 212312 in fiscal years 2026 and 2027 are FPA Pacific Corp. ($11,072,965); Tarpan Construction, LLC ($1,183,236); and Willard Quarries, Inc. ($824,733).
Which agencies buy the most under NAICS 212312?
The agencies that obligated the most under NAICS 212312 in fiscal years 2026 and 2027 are Air Force ($11,351,587), Department of the Army ($4,036,183) and Department of the Interior ($1,493,334).
Which PSC codes are used with NAICS 212312?
The PSC codes with the most obligated under NAICS 212312 in fiscal years 2026 and 2027 are 5610 Mineral Construction Materials, Bulk; 5680 Miscellaneous Construction Materials; and Z1LB Maintenance of Highways/
Where is the work under NAICS 212312 performed?
By place of performance, the states with the most contract obligations under NAICS 212312 over the last 12 months are the Northern Mariana Islands ($11,072,965), Mississippi ($1,491,643) and Missouri ($977,477).
What is the latest contract opportunity under NAICS 212312?
The latest contract opportunity under NAICS 212312 is Notice of Intent to Award a Sole Source 8(a) Procurement to Next Generation Logistics, LLC, for Levee Gravel, special notice from ENDIST Memphis (USACE), posted November 4, 2026.
On GovTribe
See everything under NAICS 212312
- Federal contract opportunities, awards and IDVs under this code
- Funding analysis by contractor, agency and set-aside
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