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NAICS Code· 212312

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). Cross-References. Establishments primarily engaged in--Show more

NAICS 212312 – Crushed and Broken Limestone Mining and Quarrying covers the extraction, crushing, screening, and processing of limestone rock into aggregate products used in infrastructure construction, roadbed stabilization, and erosion control. This sector supports critical civil works projects including highway construction, airport runways, railway ballast, and military base development.

8
Active Contracts
$29.6M
Total Obligations (12mo)
88
Awarded Contracts (12mo)
29
Contractors Awarded (12mo)
3
Median Bidders per Award
-81.0%
YoY Growth

Awarded Contractors

Companies that have received federal awards classified under NAICS 212312.

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NAICS 212312 FAQ

Frequently Asked Questions

NAICS code 212312 covers 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). Cross-References. Establishments primarily engaged in--

Recently Posted in Crushed and Broken Limestone Mining and Quarrying

NAICS: 212312
Closed
Federal
Y--Canceling | Rip-Rap, Lower Yellowstone River
Solicitation # 140R6026Q0092
The contract solicitation 140R6026Q0092 for Rip-Rap for the Lower Yellowstone Bypass Canal is a total small business set-aside under NAICS code 212312, restricted to eligible small businesses including HUBZone, SDVOSB, WOSB, EDWOSB, and 8(a) participants, with a size standard of 750 employees. The contract requires the supply and delivery of 25,000 tons of D100 16-inch riprap and 20,000 tons of bedding material to stockpile site A near Glendive, Montana, with all work must be completed by November 30, 2027. Materials must adhere strictly to ASTM standards including C97 for specific gravity, C88 for sulfate soundness, C33 for aggregate quality, and C128 for fine aggregate, with additional requirements for freeze-thaw resistance (≤5% degradation), angularity, and exclusion of shale, caliche, and organic matter. Delivery is FOB destination, with title and risk of loss transferring upon arrival, and electronic load tickets must accompany each delivery to the Contracting Officer’s Representative via email. Invoices are required to be submitted electronically through the U.S. Treasury’s Invoice Processing Platform (IPP), with a copy emailed to alicia_dunn@ios.doi.gov prior to submission; WAWF is not used. Pre-delivery submission of lab test results is mandatory three days in advance, and all materials must be handled to prevent contamination and segregation during transport and storage. The award will be based on a trade-off process evaluating technical capability and past performance as equally important as price, with no use of LPTA. The contract includes multiple FAR clauses with deviations effective April 2026, particularly in reporting, subcontracting, and commercial item provisions, along with requirements for SAM registration, UEI validation, and compliance with DPAS Regulation 15 CFR 700. The Contracting Officer’s Representative has limited authority, and unauthorized directives from the COR carry risk for the contractor. The Government retains final inspection and acceptance authority at the delivery site, and contractors must ensure all proprietary information is properly marked under applicable confidentiality rules. No contract value is provided, and all pricing details remain unspecified in the solicitation.
Great Plains Regional Office

POSTED

15 days ago

CLOSED

8 days ago
View Details

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