samsearch
    Platform
    01InfluenceShape the requirement before it's on your competitor's radar.
    Signal
    Recompete window opens in 42 days
    Facilities maintenance IDIQ$8.4M
    Forecast
    Agency spend up 18% next FY
    DoD facilitiesQ3 window
    02CaptureFind and qualify the work across every market.
    Federal91%
    Network engineering support — GSA MAS
    GSA541512
    SLED88%
    Custodial services — Fairfax County Public Schools
    K-12561720
    DIBBS79%
    Aircraft hydraulic fitting — DLA Aviation
    DLANSN 5330
    03AnalyzeExtract requirements and build the compliance matrix.
    Compliance matrix
    L.2.1Technical approachVol I
    L.3.4Staffing planVol I
    M.1Past performanceEvaluated
    SOW breakdown
    Requirements extracted38
    Mapped to Section L/M38
    Every extractionCited
    Ask Sammy
    “Do we meet the small business set-aside?”
    04ManageRun the pursuit through to award.
    Pipeline
    QualifyFacilities support · USACE
    CaptureComms upgrade · DLA
    ProposalShipyard dredging · NAVSEA
    PriyaAlex
    This week
    Submit past performance refsThu
    Confirm subK teamingFri
    Upload SF 33Mon
    05RespondDraft and submit your response.
    Drafting · Volume I
    247 words
    RFI response
    CompanyAcme Robotics LLC
    UEIJK4M8…
    Capability narrativeDrafted
    06FinanceGet paid faster on what you win.
    Capital available
    $2.4M against your award
    Facilities maintenance IDIQAwarded
    Partner matched
    LenderFederal Capital Partners
    Draw available$2.4M
    UnderwritingCleared
    The platform
    Influence
    Capture
    Analyze
    Manage
    Respond
    Finance
    One pipeline, six stages, start to award.
    See the whole platform
    Solutions
    By industry
    Tech & softwareSoftware and SaaS companies entering GovCon.Defense contractorsPrimes and subs in the defense industrial base.ConstructionBuilders bidding federal, state, and local work.CybersecuritySecurity vendors pursuing federal mandates.
    By team
    Capture managers & BDPipeline, qualification, and win strategy.Proposal teamsCompliance matrices and proposal drafting.Subcontractors & primesTeaming, subcontracting, and partner fit.
    By company size
    Small businessesSet-aside and small business contractors.EnterpriseLarge contractors running multiple pursuits.ConsultantsAdvisors and capture consultants.
    Browse all industries
    CustomersPricing
    ResourcesNew
    Learn
    AcademyCourses, guides, and playbooks.WebinarsLive sessions and recordings.DocsProduct documentation and setup guides.Implementation planOperational rollout guidance.
    Tools & data
    Free GovCon toolsCalculators, lookups, and more.Gov ExploreContracts, agencies, and NAICS codes.GovCon eventsConferences, training, and set-aside events.
    Latest blogIntroducing the New SamSearch: The Operating System for Government ContractingSamSearch has a new brand, a new site, and a new way of explaining what the platform actually does — the operating system for government contracting, organized around six stages instead of a single search box. Here's what changed and why.Read the post →
    All resources and tools
    Sign inRequest a demo
    /

    SamSearch Platform

    Stop searching. Start winning.

    AI-powered intelligence for the right opportunities, the right leads, and the right time.

    Book a Demo
    samsearch

    The Complete AI Platform for Government Contracting

    Platform
    • Product
    • Pricing
    • ROI calculator
    • Integrations
    • Changelog
    Solutions
    • Solutions
    • Customers
    • Comparisons
    • Market watch
    Resources
    • Blog
    • Free GovCon tools
    • Glossary
    • Docs
    Company
    • API & partnerships
    • Careers
    • Support
    • Compliance
    • Trust centre
    • Contact
    Recognised & verified
    SOC 2 Type II Compliant, SamSearchAWS Partner - Advanced, SamSearch on AWS MarketplaceGartner Peer Insights Customer First, SamSearch
    Ask AI about samsearch
    Ask ChatGPTAsk ClaudeAsk Perplexity
    Follow

    © 2026 samsearch. All rights reserved.

    Terms of usePrivacy policy
    1. Home
    2. /Gov Explore
    3. /NAICS Codes
    4. /21231

    NAICS Demand Lane

    Stone Mining and Quarrying, Contract Opportunities

    392 total opportunities (392 active) tied to NAICS 21231 across federal, state, local, and forecast sources.
    NAICS 21231Federal + SLED392 total
    View NAICS definition →
    Total Opportunities
    392
    Across all indexed sources
    Active Estimate
    392
    Approximate active count
    Source Count
    3
    Federal, SLED, and forecast lanes

    Latest federal solicitations for NAICS 21231.

    DEPARTMENT OF THE INTERIOR

    56--MRG RIPRAP STOCKPILE

    Active

    AI Summary

    The Department of the Interior, Bureau of Reclamation, is seeking proposals for the MRG Riprap Stockpile project. This opportunity involves both products and services related to riprap materials. Interested bidders should prepare to submit their proposals in response to this combined synopsis/solicitation.

    UT

    Posted Aug 25, 2026Due Sep 1, 2026Combined Synopsis/SolicitationNAICS 212319Total Small Business Set-Aside (FAR 19.5)Sol: 140R4026Q0098
    View details→

    DEPARTMENT OF THE INTERIOR

    FL-ST. MARKS NWR-ROAD MATERIAL

    Active

    AI Summary

    The U.S. Fish and Wildlife Service is soliciting bids for the delivery and tailgate spreading of Florida DOT approved road base at St. Marks NWR. This opportunity is set aside for SBA Certified EDWOSB firms. Vendors must provide a minimum of 5-10 dump trucks daily and source materials within 100 miles to prevent invasi…

    VA

    Posted Aug 24, 2026Due Aug 28, 2026SolicitationNAICS 212319SBA Certified Economically Disadvantaged WOSB (EDWOSB) Program Set-Aside (FAR 19.15)Sol: 140F0S26Q0058
    View details→

    DEPARTMENT OF AGRICULTURE

    DESCHUTES NATION FOREST ROCK CRUSHING - BLACK BUTTE PIT

    Active

    AI Summary

    This opportunity involves a Request for Quotation (RFQ) for rock crushing services at the Black Butte Pit in Sisters, Oregon. The project includes clearing, pit development, aggregate crushing, stockpiling, and testing. It is set aside for small businesses, with work expected to commence between October 1, 2026, and Ap…

    OR

    Posted Aug 20, 2026Due Sep 10, 2026Combined Synopsis/SolicitationNAICS 212319Total Small Business Set-Aside (FAR 19.5)Sol: 1240BE26Q0104
    View details→

    DEPT OF DEFENSE

    WHATCOM BYLSMA MATERIALS

    Active

    AI Summary

    The Department of Defense is soliciting bids for the supply and delivery of materials for levee reconstruction near Ferndale, WA, in response to the December 2025 flood event. Bidders must provide materials using a Solo Dump Truck or Truck and Transfer as specified in the Scope of Work.

    WA

    Posted Aug 20, 2026Due Aug 27, 2026SolicitationNAICS 212319Total Small Business Set-Aside (FAR 19.5)Sol: W912DW26QA077
    View details→

    DEPARTMENT OF THE INTERIOR

    WI NECEDAH NWR ROAD BASE AND RIP RAP

    Active

    AI Summary

    The U.S. Fish and Wildlife Service is soliciting proposals for road base and rip rap at the Necedah National Wildlife Refuge. This opportunity involves both product and service components related to infrastructure development. Interested bidders should prepare to submit their proposals by the specified deadline.

    VA

    Posted Aug 20, 2026Due Sep 4, 2026SolicitationNAICS 212319Total Small Business Set-Aside (FAR 19.5)Sol: 140FS226Q0182
    View details→

    DEPT OF DEFENSE

    BULK PURCHASE RIPRAP MATERIALS

    Active

    AI Summary

    The Department of Defense, specifically the Department of the Air Force, is seeking a supplier for the bulk purchase and delivery of angular riprap stone. This opportunity is categorized as a Combined Synopsis/Solicitation and is open for bids until August 28, 2026.

    CO

    Posted Aug 18, 2026Due Aug 28, 2026Combined Synopsis/SolicitationNAICS 212319Sol: FA251726QA032
    View details→

    DEPT OF DEFENSE

    QUARRY MATERIAL

    Active

    AI Summary

    The Department of Defense is seeking quotes for various quarry materials to be delivered to the Letterkenny Army Depot over the next five years. This opportunity is not set aside for small businesses and requires submission of quotes via email. The solicitation number is W911N226QA010, and it includes a range of constr…

    PA

    Posted Aug 17, 2026Due Sep 1, 2026Combined Synopsis/SolicitationNAICS 212312Sol: W911N226QA010
    View details→

    DEPARTMENT OF THE INTERIOR

    56--LOWER YELLOWSTONE RIVER BYPASS CANAL RIPRAP

    Archived

    AI Summary

    The Bureau of Reclamation is seeking potential sources for 25,000 tons of D100 16-inch riprap and 20,000 tons of bedding material. This sources sought notice aims to gather information for planning purposes only. Interested small businesses are encouraged to submit their capabilities statements by August 24, 2026.

    MT

    Posted Aug 17, 2026Due Aug 24, 2026Sources SoughtNAICS 212319Sol: 140R6026Q0144
    View details→

    DEPT OF DEFENSE

    HOWARD HANSON DAM - TRANSPORT OF LARGE WOOD DEBRIS AND GRAVEL PURCHASE AND DELIVERY

    Archived

    AI Summary

    This opportunity involves the transport of large wood debris and the purchase and delivery of gravel for the Howard Hanson Dam project. It is a combined synopsis/solicitation set aside for small businesses, issued as a request for quotation (RFQ). Offers are being requested, and no separate written solicitation will be…

    WA

    Posted Aug 17, 2026Due Aug 19, 2026Combined Synopsis/SolicitationNAICS 212319Total Small Business Set-Aside (FAR 19.5)Sol: W912DW26QA0088
    View details→

    DEPARTMENT OF THE INTERIOR

    Y--CANCELING | RIP-RAP, LOWER YELLOWSTONE RIVER

    Archived

    AI Summary

    This opportunity involves the cancellation of a solicitation for rip-rap services for the Lower Yellowstone River, managed by the Department of the Interior's Bureau of Reclamation. The primary NAICS code is 212312, and the opportunity is categorized as a product. Interested parties should note the cancellation status.

    MT

    Posted Aug 14, 2026Due Aug 21, 2026SolicitationNAICS 212312Total Small Business Set-Aside (FAR 19.5)Sol: 140R6026Q0092
    View details→

    Source mix

    How this NAICS code is represented across indexed contract sources.

    federal
    274
    sled
    102
    forecast
    16

    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

    • 21231 Definition→
    • Browse NAICS Codes→
    • PSC Contract Lanes→
    • AI Contract Categories→
    • Browse by Agency→
    • Browse by State→

    About NAICS 21231

    Stone Mining and Quarrying involves the extraction of dimension stone, crushed and broken stone, riprap, sand, gravel, and clay from the earth. This industry includes operations that quarry stone for use in construction, landscaping, and other applications.

    Read the full NAICS definition →