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    1. Home
    2. /Gov Explore
    3. /NAICS Codes
    4. /21311

    NAICS Demand Lane

    Support Activities for Mining, Contract Opportunities

    435 total opportunities (435 active) tied to NAICS 21311 across federal, state, local, and forecast sources.
    NAICS 21311Federal + SLED435 total
    View NAICS definition →
    Total Opportunities
    435
    Across all indexed sources
    Active Estimate
    435
    Approximate active count
    Source Count
    3
    Federal, SLED, and forecast lanes

    Latest federal solicitations for NAICS 21311.

    DEPARTMENT OF VETERANS AFFAIRS

    H266--BOILER PLANT GAS DETECTION TESTING

    Archived

    AI Summary

    The Department of Veterans Affairs is soliciting proposals for boiler plant gas detection testing services. This opportunity is classified under NAICS code 213112. Interested bidders should prepare to submit their proposals by the specified deadline.

    MS

    Posted Aug 18, 2026Due Aug 21, 2026SolicitationNAICS 213112Sol: 36C25626Q1147
    View details→

    DEPARTMENT OF THE INTERIOR

    F--JELA WELL PLUGGING - 2026

    Active

    AI Summary

    The Department of the Interior, National Park Service, is seeking proposals for well plugging services at JELA. This opportunity is categorized under NAICS code 213112 and is a combined synopsis/solicitation. Interested bidders should prepare to address the specific requirements outlined in the solicitation.

    DC

    Posted Aug 17, 2026Due Sep 3, 2026Combined Synopsis/SolicitationNAICS 213112Sol: 140PS126B0009
    View details→

    DEPT OF DEFENSE

    31--BEARING,SLEEVE

    Archived

    AI Summary

    The Department of Defense is seeking quotes for 48 units of NSN 3120013681691, BEARING, SLEEVE. This opportunity is a combined synopsis/solicitation and is available electronically. All responsible sources may submit a quote, which will be considered if timely received.

    VA

    Posted Aug 16, 2026Due Aug 24, 2026Combined Synopsis/SolicitationNAICS 213113Sol: SPE4A626T18FR
    View details→

    DEPT OF DEFENSE

    31--BUSHING,SLEEVE

    Archived

    AI Summary

    The Department of Defense is seeking quotes for the procurement of 13 units of bushing, sleeve (NSN 3120011147043) with delivery to DLA Distribution Depot Oklahoma. Quotes must be submitted electronically and will be considered if received in a timely manner. The procurement falls under FAR Part 13 - Simplified Acquisi…

    VA

    Posted Aug 16, 2026Due Aug 24, 2026Combined Synopsis/SolicitationNAICS 213113Total Small Business Set-Aside (FAR 19.5)Sol: SPE4A626T17YD
    View details→

    DEPARTMENT OF THE INTERIOR

    BUFFALO MONITOR WELL PLUGGING 2026

    Active

    AI Summary

    The Department of the Interior, Bureau of Land Management is seeking proposals for the Buffalo Monitor Well Plugging project, Phase III at Ford Ranch. This opportunity involves environmental services related to monitoring well plugging. Interested bidders should prepare to submit their proposals by the specified deadli…

    CO

    Posted Aug 12, 2026Due Sep 2, 2026Combined Synopsis/SolicitationNAICS 213112Total Small Business Set-Aside (FAR 19.5)Sol: 140L0626Q0017
    View details→

    DEPT OF DEFENSE

    PREVENTIVE MAINTENANCE PROGRAM AND SERVICE ORDERS FOR ABOVEGROUND STORAGE TANKS (AST), YOKOSUKA, JAPAN

    Archived

    AI Summary

    The Naval Facilities Engineering Command, Far East seeks a contractor for a Firm Fixed Price contract to provide preventive maintenance and service orders for aboveground storage tanks at Commander Fleet Activities Yokosuka, Japan. The contract will include a base period and four one-year options.

    AP

    Posted Aug 11, 2026Due Aug 25, 2026Sources SoughtNAICS 213112Sol: N4008426B0408
    View details→

    DEPT OF DEFENSE

    30--SHAFT,SPECIAL

    Archived

    AI Summary

    The Department of Defense is soliciting quotes for 88 units of SHAFT, SPECIAL under NSN 3040218787289. This RFQ may lead to an Indefinite Delivery Contract with a one-year term. Quotes must be submitted electronically, and hard copies are not available. The estimated total order value is $350,000.

    OH

    Posted Aug 10, 2026Due Aug 25, 2026Combined Synopsis/SolicitationNAICS 213113Sol: SPE7LX26U9495
    View details→

    DEPARTMENT OF ENERGY

    E-SEAL TECHNOLOGY: A NEW PARADIGM FOR LEAKY WELL REMEDIATION

    Active

    AI Summary

    The Department of Energy is exploring E-Seal Technology for leaky well remediation, offering a novel liquid sealant that effectively addresses microfractures in well casings. This technology promises significant cost savings and enhanced sealing performance, with applications in oil and gas recovery, geothermal energy,…

    OH

    Posted Aug 5, 2026Due Oct 1, 2026Special NoticeNAICS 213112Sol: S-197080
    View details→

    DEPT OF DEFENSE

    53--KNOB

    Archived

    AI Summary

    The Department of Defense is soliciting quotes for 71 units of NSN 5355014616920 KNOB under an RFQ. This procurement may lead to an Indefinite Delivery Contract with a maximum order total of $350,000. Quotes must be submitted electronically, and hard copies are not available.

    OH

    Posted Aug 3, 2026Due Aug 18, 2026Combined Synopsis/SolicitationNAICS 213113Total Small Business Set-Aside (FAR 19.5)Sol: SPE7LX26U9133
    View details→

    DEPARTMENT OF VETERANS AFFAIRS

    H266--Boiler Plant Gas Detection Testing

    Archived

    AI Summary

    The Department of Veterans Affairs is seeking small businesses for boiler plant gas detection testing. No acceptable offers were received, and the requirement will be resolicited within the next 30 days. Interested parties should prepare for the upcoming solicitation.

    MS

    Posted Jul 28, 2026Special NoticeNAICS 213112Sol: 36C25626Q0991
    View details→

    Source mix

    How this NAICS code is represented across indexed contract sources.

    federal
    195
    sled
    239
    forecast
    1

    Related NAICS Codes

    • 21, Mining, Quarrying, and Oil and Gas Extraction→
    • 211, Oil and Gas Extraction→
    • 2111, Oil and Gas Extraction→
    • 21112, Crude Petroleum Extraction →
    • 211120, Crude Petroleum Extraction →
    • 21113, Natural Gas Extraction →
    • 211130, Natural Gas Extraction →
    • 212, Mining (except Oil and Gas)→
    • 2121, Coal Mining→
    • 21211, Coal Mining→

    Explore

    • 21311 Definition→
    • Browse NAICS Codes→
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    About NAICS 21311

    Support Activities for Mining include establishments that perform exploration, drilling, and other support services for mining operations. These activities facilitate the extraction of minerals and other geological materials from the earth.

    Read the full NAICS definition →