U.S. Industrial Sand Mining — An Investor's Primer

NAICS 2022 code 212322 — Industrial Sand Mining (United States)

NAICS = North American Industry Classification System, the federal code that defines this industry. This primer is for a general investing audience — both public-market investors (listed producers, oilfield-service and royalty companies, sector funds) and private investors (private/private-equity-owned operators, mineral- and royalty-rights owners). Core U.S. business statistics come from our ingested federal data; physical production and reserves come from the U.S. Geological Survey (USGS) and U.S. Energy Information Administration (EIA), clearly labeled by source. Reported facts are separated from forward-looking judgments in the wording.

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1. Overview

Industrial sand mining is the business of digging, washing, drying, and sorting high-purity quartz sand (silica, chemical formula SiO₂) and selling it by the ton. It is a small industry by headcount but economically outsized because roughly four out of every five tons go into hydraulic fracturing — the "frac sand" (proppant) pumped down shale oil and gas wells to prop the fractures open [1][2]. Glassmaking, foundry molds, filtration, and abrasives take most of the rest.

That single fact defines the investment case: NAICS 212322 is, in practice, a leveraged, cyclical bet on U.S. shale completions activity dressed up as a mining business. These operators are price-takers in a commodity market — they cannot set the price of a homogeneous, substitutable product, so their margins swing hard with the drilling cycle and with periodic sand oversupply. The distinctive economic twist is that sand is cheap but heavy: freight, not geology, is the binding constraint, so the winners are whoever can put the lowest-cost ton on the wellsite.

Why an investor cares. In an up-cycle the cash flow is exceptional; in a down-cycle prices can fall below full cost, dividends get cut, and over-levered operators go bankrupt. The last decade produced exactly that pattern — a boom, a wave of Chapter 11 filings (Hi-Crush, Covia), and take-privates (U.S. Silica → Apollo) that thinned the public market down to a handful of names.

Public vs. private ways in. Direct public exposure is now narrow — essentially one Permian pure-play (Atlas Energy Solutions), one Northern White micro-cap (Smart Sand), and one vertically integrated pressure-pumper with captive sand (ProFrac); no dedicated frac-sand fund exists. The majority of tonnage is private, private-equity-owned, or foreign-owned, and much of the durable, lower-risk return sits in mineral and surface royalties — clipping a per-ton fee without operating a mine.

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2. What it is and how it is structured

Scope

NAICS 212322 covers establishments primarily engaged in operating industrial-grade sand pits, dredging industrial-grade sand, and washing, screening, or otherwise preparing it — including basic mine-site processing (crushing, washing, attrition, screening, drying, blending) when done as part of the mine [6]. "Industrial-grade" means high-silica sand for manufacturing and oilfield uses, as distinct from ordinary sand for concrete and road base. Principal products: frac sand and other natural proppants, glass-grade silica, foundry sand, filtration media, fillers, and ground silica [1].

What is excluded (the adjacent codes)

A structural caution for investors: the boundary matters because integrated producers report consolidated revenue that bundles terminals, trucking, conveyors, power, or fracturing services. Those consolidated figures are not equivalent to NAICS 212322 mining revenue [10][18].

Ownership mix

The industry is a barbell: a few large operators (mostly private, PE-, or foreign-owned) plus a long tail of small private and family mines. Public-equity participation has shrunk over the last five years. By our federal count there were 110 firms operating in 2022 [3], and USGS put 2025 production at 131 companies running 207 operations across 38 states [1]. The categories:

• Publicly listed: Atlas Energy Solutions, Smart Sand, ProFrac (a hybrid).
• Private-equity-owned: U.S. Silica (Apollo Global Management, since 2024).
• Foreign/creditor-owned: Covia (majority owner Sibelco of Belgium, post-restructuring).
• Family-owned: Badger Mining.
• A fragmented private tail of in-basin (Permian/Eagle Ford) operators and mineral/surface-royalty owners.

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3. How big it is

Two federal lenses measure this industry, and they do not agree — for a reason worth understanding.

3a. Our federal business statistics (Census)

These count U.S. employer establishments whose primary activity is industrial sand mining.

CBP = County Business Patterns, an annual Census employer tabulation. Average pay works out to roughly $87,000 per employee — a small but well-paid, capital-intensive blue-collar workforce, not a large national employer.

Concentration (Economic Census 2022) [3]: the four largest firms earned 47.2% of industry revenue (the CR4 ratio), the top 8 earned 58.2%, the top 20 earned 77.5%, and the top 50 earned 94%. The Herfindahl-Hirschman Index (HHI, a standard concentration measure) was suppressed by the Census Bureau and we do not have it — so we cannot state it. The picture: a concentrated top tier over a long competitive tail.

3b. Physical production and value (USGS — the commodity lens)

USGS surveys the commodity (all operations, including those whose primary business is classified elsewhere), so its numbers are broader and its dollar value larger. Figures are in metric tons (Mt = million metric tons); "sold or used" is USGS's shipment measure.

Source: USGS Mineral Commodity Summaries 2026 [1] (and 2025 [2]). In 2025, volume fell an estimated 5% while value fell 16% — the signature of a price-taker caught in oversupply. The U.S. is the world's largest producer and consumer (~120–130 Mt of a ~440 Mt world total) and a consistent net exporter (~8 Mt exported vs. ~0.2 Mt imported, most imports from Canada) [1][2].

End-use mix (2025) [1]: hydraulic fracturing, well-packing, and cementing ≈ 81%; glassmaking ≈ 7%; foundry, fillers, filtration, and recreation ≈ 7% combined; the remainder split among chemicals, abrasives, ceramics, silicon/ferrosilicon, roofing, and traction. Frac sand dominance is the defining feature.

Leading states (2025): Texas, Wisconsin, Oklahoma, and Louisiana = 77% of national output [1].

3c. Why the two lenses differ (the undercount)

USGS's ~$4.5–5.5 billion commodity value runs well above the Census $2.96 billion of business receipts. The gap is definitional, not an error: USGS captures the whole commodity including operations classified under other primary businesses (oilfield services, captive mines owned by pumpers or producers) and values delivered/sold tonnage, whereas Census counts only establishments primarily classified in 212322. Treat the USGS figure as the better gauge of the physical industry's economic size, and the Census figure as the size of the stand-alone "sand-mining" business population. They should not be added or averaged.

3d. Reserves

Geological sand is abundant; scarcity is not the risk here. USGS does not publish a single national reserve tonnage, and notes deposits are widespread [1] — so, unlike gold or copper, "running out" is not the constraint. The scarce asset is good, permitted, saleable sand near the point of use. Company disclosures are more useful than any national figure: Smart Sand reported roughly 462 million saleable tons across its mines at year-end 2025 [13], and U.S. Silica (before going private) reported 479 million tons of commercial silica reserves [15]. Beware headline reserve life: a mine with decades of geological reserve can still be economically impaired next year if its basin, mesh size, freight route, or contracts lose competitiveness.

SBA size standard: the U.S. Small Business Administration (SBA) treats a 212322 business (with affiliates) as "small" up to 750 employees [7] — a threshold nearly every operator clears, making the industry overwhelmingly "small business" by federal definition.

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4. The investable universe

Public pure-plays are few, and all are small relative to the oil and gas industry they serve. Our source set does not include current share prices or market capitalizations, so we state latest reported revenue and a key operating metric rather than invent a market cap; qualitative size is noted.

Indirect and asset-light routes. There is no dedicated frac-sand exchange-traded fund (ETF). Diversified exposure comes only indirectly through oilfield-services ETFs (which hold sand names alongside pumpers and equipment makers), or through Apollo Global Management (NYSE: APO), for which U.S. Silica is a small piece of a large alternative-asset manager. On the royalty side, LandBridge (NYSE: LB) owns ~277,000 Permian surface acres and books surface-use royalties and resource sales (including frac sand and brackish water) — an asset-light way to earn on sand volumes without operating a mine [22] (single-source; treat as illustrative).

The common thread: every one of these is levered to commodity prices — specifically to shale completions and the realized sand price. Position them as cyclical energy-beta, not defensive miners.

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5. How the money works

Industrial sand miners are classic price-takers in a commodity business. They take the market-clearing price and compete on cost, location, and logistics. There is no WTI-like national benchmark (WTI = West Texas Intermediate, the U.S. crude oil price marker); sand is priced deal-by-deal on mesh size, quality, delivery point, and contract terms.

5a. The commodity price is the dominant driver

Average minegate value swung from $29.50/ton (2020) → $45.40/ton (2022) → ~$36/ton (2025e) [1][2]. Because a mine's costs are largely fixed (labor, dryers, plant), a price swing falls almost entirely through to margin. This is high operating leverage: small moves in price or utilization produce large swings in cash flow — and, at the trough, insolvency. It is a double commodity exposure: oil and gas prices set completion budgets (demand), while sand supply-and-demand sets the realized price.

5b. The cost curve is a freight curve

For most mined commodities the cost curve is about ore grade or lifting cost. For frac sand it is about transportation. Trade estimates put logistics at roughly 70% of the delivered cost of railed sand [20]; as a company-level anchor, U.S. Silica reported transportation at ~31% of total 2023 sales (blended across less-freight-intensive industrial products) [15]. The result is a two-cost-curve market:

• In-basin sand (mined inside the Permian, West Texas): lower physical quality but very low freight, short lead times, and the option to ship damp/wet sand and skip drying. Trade sources cite ~$25–37/ton at the mine [20].
• Northern White sand (Wisconsin/Illinois): rounder, stronger, more consistent grains — but must absorb long rail hauls, terminals, and last-mile trucking, landing near ~$65–85/ton delivered to Midland [20].

Sourcing locally can save on the order of ~$500,000 per well [20]. This is the freight-limited, local-pricing model familiar from aggregates — applied to a nationally traded oilfield input. It explains why the supply base migrated to the Permian and why owning the logistics (conveyors, unit-train terminals, wet-sand handling) is where differentiated returns live.

5c. A worked example (Smart Sand, FY2025)

Sand revenue ~$325.8M on 5.44 Mt implies roughly $59.9 per short ton of revenue against ~$52.9 of cost — a ~$7/ton spread before corporate costs [13][14]. (These are delivered figures including freight and mix, not minegate prices.) A thin per-ton spread on a heavy, cheap product is exactly why freight, price, and utilization dominate earnings.

5d. Capital intensity, depletion, and reserve life

Mines, wash plants, dryers, silos, and rail/terminal assets are capital-heavy and location-fixed — you cannot move a plant to chase demand. Reserve lives are long (Atlas cites 11–29 years on its proven-and-probable reserves [11]), which means low geological risk but heavy sunk capital. For tax, USGS lists a percentage-depletion allowance of 14% for higher-value industrial sand, cut to 5% for common varieties [1][2] — a modest shield that investors should confirm for a specific operation. Reclamation liabilities are real even when decades away: Smart Sand carried ~$22.5M of asset-retirement obligations plus ~$19.7M of performance bonds; U.S. Silica accrued ~$30.4M for reclamation with ~$51.8M of related surety bonds [13][15].

5e. Royalties and mineral/surface rights

Most industrial sand is mined from private land or private leases, so landowners and mineral/surface owners collect per-ton royalties — for example, Smart Sand disclosed ~$0.50/ton on some Oakdale product and ~$1.70/ton (with minimums) at Blair [13]. A royalty owner earns off the top, avoiding operating-cost inflation and capital spending, but still bears whether the operator mines at all, product marketability, lease expiry, and operator-credit risk. In Texas, sand is often a surface (not mineral-estate) resource, so surface ownership can be a distinct cash-flowing asset — and Texas began taxing frac sand as a processed material on July 1, 2025, ending a long-standing sales-tax exemption and adding a direct margin headwind [2].

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6. What drives demand

Frac sand (~81% of tonnage) is the swing factor. The useful demand identity is:

completed wells × lateral feet per well × pounds of proppant per foot = frac-sand demand.

Rig count alone is misleading. Even as rigs fall, sand per well keeps rising because laterals are longer and operators pump more sand per foot — Permian proppant intensity now averages on the order of ~1,900 lb/ft (and reaches ~5,000), so a single well can consume thousands of tons [20]. That decoupling is why tonnage held near record levels through a soft rig environment. The chain runs with lags: oil and gas prices → E&P (exploration and production) budgets → active frac fleets → sand demand → realized sand price.

The physical backdrop is large and growing. Per EIA (the U.S. Energy Information Administration), the Permian alone produced ~6.0 million barrels per day of crude (44% of U.S. output) and 22.2 billion cubic feet per day (Bcf/d) of dry gas in December 2025 [23]; U.S. marketed gas hit a record 118.5 Bcf/d in 2025 [24]. EIA's July 2026 outlook sees crude rising to ~14.0 million barrels/day by 2027 and LNG (liquefied natural gas) exports climbing from 15.1 to 18.6 Bcf/d [25] — supportive of volumes, though not necessarily of prices if sand capacity stays ample.

Non-frac demand (~19%) is steadier: glassmaking (~7%, tied to construction, autos, packaging, and increasingly solar), foundry sand (metal casting), and fillers/filtration/abrasives/ceramics. These have longer qualification cycles, tighter specs, and higher switching costs — a ballast that dampens the oilfield cycle for diversified producers (U.S. Silica, Covia) but is absent for pure-play frac producers (Atlas, Smart Sand, Alpine).

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7. Regulation

• Mine safety (MSHA). The Mine Safety and Health Administration is the primary federal safety regulator. Its April 2024 final rule on respirable crystalline silica cut the permissible exposure limit (PEL) from 100 to 50 µg/m³ (8-hour time-weighted average) and set a 25 µg/m³ action level, with medical surveillance and respiratory protection [8]. Important update: as of mid-2026 the metal/nonmetal compliance deadlines and conforming amendments are indefinitely delayed under a judicial stay; MSHA continues enforcing pre-existing standards [9]. So the health risk and prospective cost remain, but investors should not model the new limits as already fully enforceable. Silica dust (silicosis, and product-liability litigation — U.S. Silica reported 39 active claims at year-end 2023 [15]) is the industry's signature exposure.
• Environmental / permitting (EPA and states). Air permits for particulate and silica dust, Clean Water Act discharge/stormwater permits, wetlands (Army Corps Section 404), water-use permits, and reclamation bonding. In practice state and county processes — zoning, road use, truck traffic, water — are often more commercially decisive than federal law, especially for greenfield mines and expansions; local opposition pushes new operations farther from population centers [1][13].
• Land tenure (BLM) — largely minor here. Common sand is generally not a locatable mineral under the General Mining Law of 1872; since 1955 it has been handled as a "salable" material under the Materials Act of 1947, sold by the Bureau of Land Management (BLM) at fair market value [26]. But most frac-sand economics run on private and state land, so BLM leasing matters far less than it does for oil, gas, coal, or hard-rock metals. (High-spec silica can occasionally qualify as an "uncommon variety" — a deposit-by-deposit determination [26].)
• Taxes / royalties / ESG. No single national severance regime; royalties are contractual and state treatment varies (Texas's 2025 sales-tax change being a recent example [2]). ESG friction centers on dust, water, truck traffic, and drying emissions — pressures that partly drive the shift to wet sand, electrified conveyors, and shorter in-basin hauls, though the net picture is complicated by sand's role in enabling more hydrocarbon production.

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8. Competitive dynamics and consolidation

The competitive story of the last decade is geography beating brand. Northern White was the premium proppant, but once in-basin operators proved cheaper local sand worked, freight economics won: Wisconsin mines idled and laid off workers even during record national demand, and production migrated to Texas [21]. The Permian is now roughly half of national frac-sand demand [20].

Because geological sand is abundant, durable advantage comes not from the deposit but from low delivered cost, permits and community acceptance, captive/contracted logistics, customer contract quality, and balance-sheet capacity to survive downturns [15][18]. A cheap mine with expensive freight sits high on the delivered-cost curve; an operator may accept higher extraction cost if a conveyor eliminates trucking.

Consolidation has come through distress and integration: Hi-Crush and Covia went through Chapter 11 [17]; U.S. Silica was taken private by Apollo [16]; Atlas rolled up Hi-Crush [12]; ProFrac integrated Alpine Silica and others [18]. Vertical integration cuts both ways — ProFrac's captive sand feeds its own frac fleets, but transfers sand-cycle risk into the combined enterprise. Customer power is rising too: Atlas's ten largest customers were 82.4% of 2025 revenue [10]. Net: a market that fragments in booms and consolidates in busts, where the moat is location, integrated logistics, and cost — not product differentiation.

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9. Risks

1. Commodity-price cyclicality — the central risk. Sand pricing is hostage to shale completions and to periodic oversupply; the 2025 estimate (volume −5%, value −16%) shows the operating leverage in action [1]. High fixed costs turn modest price moves into large earnings swings and, at the trough, insolvency (Hi-Crush, Covia) [17].
2. Oversupply / stranded capacity. Mines expand faster than reserves deplete; once built, operators produce at low margins to cover fixed costs, prolonging downturns. ProFrac's $41.4M Merryville impairment is a concrete example [18].
3. Cost inflation and freight. Diesel, rail, trucking, power, and drying fuel hit directly, and a fixed-price contract may not pass them through [15].
4. Logistics disruption. Rail congestion, demurrage, weather, or conveyor failure can erase an otherwise attractive mine margin.
5. Permitting, health, and litigation. Tighter silica limits (if the stay lifts), slow local permitting, and silica product-liability claims raise cost and can strand pre-development capital [8][9][15].
6. Energy-transition / stranded-asset risk. With ~80% of tonnage tied to fossil-fuel extraction, a durable decline in U.S. drilling would shrink the addressable market and strand mines, railcars, and terminals long before geological reserves run out — a demand-concentration risk analogous to (though less acute than) coal's. The glass/foundry/filtration segment is not fossil-linked and provides partial insulation.
7. Balance-sheet and private-market risk. The sector's bankruptcy history shows long reserves do not protect an over-levered capital structure [17]; private mineral and operating interests add illiquidity, title, and operator-credit risk.

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10. How to invest, and the outlook

Public routes

• Producer equities. The cleanest listed exposure is Atlas Energy Solutions (AESI) — low-cost Permian tons plus owned logistics — with Smart Sand (SND) a Northern White micro-cap and ProFrac (ACDC) a hybrid (frac services + captive sand) [10][13][18]. Expect a boom-bust dividend/buyback pattern: capital returns swell in the up-cycle and get cut in the down-cycle (Smart Sand generated ~$32.5M free cash flow in 2025 and returned ~$8M via dividends/buybacks while authorizing a new $20M repurchase [14]). Judge distributions against through-cycle free cash flow, not peak earnings.
• Royalty / asset-light. LandBridge (LB) monetizes sand and water volumes through surface royalties without operating a mine [22]; Apollo (APO) offers small, diversified indirect exposure via U.S. Silica.
• Funds. No dedicated frac-sand ETF exists; oilfield-services ETFs (e.g., VanEck Oil Services, SPDR Oil & Gas Equipment & Services) hold sand names but dilute the exposure among pumpers and equipment makers.

Private routes

• Direct / PE ownership dominates the industry's tonnage (Apollo, Sibelco, family and PE-held in-basin operators). Upside comes from buying distressed capacity below replacement cost, cutting delivered cost, and securing anchor customers; the classic error is underwriting a "normalized" sand price that assumes competitors stay disciplined.
• Mineral and surface royalties are often the best risk-adjusted private position — steadier and more price-/volume-protected than operating profit, because the operator bears the labor, energy, and capital. Diligence the operator's viability, product marketability, lease terms, and title.
• Logistics/infrastructure participation (terminals, rail loops, conveyors) can produce steadier fee income than raw sand — but only if minimum-volume commitments are creditworthy and enforceable.

Outlook

The following blends reported data with forward-looking judgment. Near term (2025–2026) is soft on price, resilient on volume: USGS estimates value down to ~$4.5B on ~120 Mt in 2025 as oversupply and a lower rig count press prices toward ~$36/ton [1], while rising proppant intensity and longer laterals keep tonnage near record levels. EIA's rising crude and LNG-export forecasts support completion volumes through 2027 [25], but ample sand capacity, continued migration to cheap local supply, and low-end substitution (petroleum-coke proppant gaining share [2]) cap pricing power. Expect continued mine idling, margin compression, and consolidation into a smaller number of larger, better-capitalized operators.

Bottom line. Treat NAICS 212322 as high-operating-leverage exposure to U.S. shale completions, with an aggregates-style freight economics twist — not a scarcity-value mining story. The U.S. has ample geological sand; value accrues to whoever controls the cheapest permitted ton delivered to the wellsite. The durable ways to make money are low-cost in-basin reserves paired with owned logistics (Atlas as the public proxy; PE/private operators otherwise) and royalty/surface interests that clip a fee on volume above the operating fray. The steadiest sub-segment is industrial silica for glass, foundry, and filtration, the non-oilfield ballast in diversified owners like Apollo's U.S. Silica and Sibelco's Covia.

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Sources

1. U.S. Geological Survey, Mineral Commodity Summaries 2026 — Sand and Gravel (Industrial), February 2026. https://pubs.usgs.gov/periodicals/mcs2026/mcs2026.pdf
2. U.S. Geological Survey, Mineral Commodity Summaries 2025 — Sand and Gravel (Industrial), January 2025. https://pubs.usgs.gov/periodicals/mcs2025/mcs2025-sand-industrial.pdf
3. U.S. Census Bureau, 2022 Economic Census — NAICS 212322 (receipts $2.959B; 110 firms; concentration ratios CR4 47.2%, CR8 58.2%, CR20 77.5%, CR50 94%; HHI suppressed), released 2024. https://data.census.gov/table/ECNBASIC2022.EC2200BASIC
4. U.S. Census Bureau, County Business Patterns 2023 — NAICS 212322 (216 establishments; 6,668 employees; $578.2M annual payroll; $160.4M Q1 payroll). https://www2.census.gov/programs-surveys/cbp/datasets/2023/
5. U.S. Census Bureau, County Business Patterns 2022 — NAICS 212322 (207 establishments; 5,612 employees; $469.7M payroll). https://www2.census.gov/programs-surveys/cbp/datasets/2022/
6. U.S. Census Bureau, 2022 NAICS Definition — 212322 Industrial Sand Mining. https://www.census.gov/naics/?details=212322&year=2022
7. U.S. Small Business Administration, Table of Small Business Size Standards (effective March 17, 2023); 13 CFR §121.201 — NAICS 212322 = 750 employees. https://www.sba.gov/document/support-table-size-standards
8. Mine Safety and Health Administration, Lowering Miners' Exposure to Respirable Crystalline Silica and Improving Respiratory Protection — Final Rule, 89 Fed. Reg. 28218 (April 18, 2024). https://www.msha.gov/regulations/rulemaking/silica
9. Mine Safety and Health Administration, Delay of Effective Date of Silica-Rule Conforming Amendments (judicial stay for metal/nonmetal mines), Federal Register 2026-06584, 2026. https://public-inspection.federalregister.gov/2026-06584.pdf
10. Atlas Energy Solutions Inc., Form 10-K (FY2025), filed 2026 (consolidated revenue ~$1.095B; top-10 customers 82.4%; ~28 Mt combined capacity). https://www.sec.gov/Archives/edgar/data/1984060/000119312526067145/aesi-20251231.htm
11. Atlas Energy Solutions Inc., Form 10-K (FY2024) — 571.3 Mt proven & probable reserves; 11–29-year reserve lives; Dune Express ~13 Mt/yr. https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&CIK=1984060
12. Atlas Energy Solutions, Completes Acquisition of Hi-Crush (2024); Dune Express project page. https://ir.atlas.energy/news-events/press-releases/detail/31/atlas-energy-solutions-inc-completes-previously-announced; https://www.atlas.energy/dune-express/
13. Smart Sand, Inc., Form 10-K (FY2025), filed 2026 (5.443 Mt sold; $325.8M sand revenue; $330.2M total revenue; $1.3M net income; ~462 Mt saleable reserves; royalties; $22.5M asset-retirement obligation). https://www.sec.gov/Archives/edgar/data/1529628/000152962826000006/snd-20251231.htm
14. Smart Sand, Inc., 2025 Full-Year Results, Exhibit 99.1, 2026 (~$32.5M free cash flow; ~$8M returned; $20M repurchase authorization). https://www.sec.gov/Archives/edgar/data/1529628/000152962826000007/a2025yeexhibit991.htm
15. U.S. Silica Holdings, Inc., Form 10-K (FY2023), filed 2024 (revenue $1.55B; O&G Proppants $994.3M / 13.37 Mt / $74.38/ton; Industrial & Specialty $557.7M / 4.01 Mt / $139.09/ton; transportation ~31% of sales; 479 Mt commercial reserves; reclamation accruals; 39 active silica claims). https://www.sec.gov/Archives/edgar/data/1524741/000152474124000007/slca-20231231.htm
16. U.S. Silica / Apollo, U.S. Silica Completes Transaction with Apollo Funds — ~$1.85B, $15.50/share, closed July 31, 2024. https://www.prnewswire.com/news-releases/us-silica-completes-transaction-with-apollo-funds-302211472.html
17. Covia Holdings, Successfully Completes Financial Restructuring and Emerges from Chapter 11, Dec. 31, 2020 (formed 2018 from Unimin + Fairmount Santrol; Sibelco majority owner; 48 facilities / ~1,900 employees at year-end 2025). https://www.globenewswire.com/news-release/2020/12/31/2152155/0/en/Covia-Successfully-Completes-Financial-Restructuring-and-Emerges-from-Chapter-11.html
18. ProFrac Holding Corp., Form 10-K (FY2025), filed 2026 (~21.5 Mt nameplate across 8 mines; 9.3 Mt produced; $41.4M Merryville impairment; Alpine Silica integration). https://www.sec.gov/Archives/edgar/data/1881487/000119312526106120/acdc-20251231.htm
19. Badger Mining Corporation — company history/about (family-owned, founded 1979; Wisconsin + Kermit, TX). https://badgerminingcorp.com/about-us/
20. In-basin vs. Northern White economics — American Oil & Gas Reporter / Permian Basin Oil and Gas Magazine (logistics ~70% of delivered cost; in-basin ~$25–37/ton; Northern White ~$65–85/ton delivered Midland; ~$500k/well savings; Permian ~50% of demand; proppant intensity ~1,900–5,000 lb/ft). https://www.aogr.com/magazine/frac-facts/permian-driving-frac-sand-supply-shift
21. Wisconsin Public Radio / Wisconsin Examiner / Wisconsin DNR — Northern White migration out of Wisconsin. https://www.wpr.org/economy/despite-record-demand-frac-sand-wisconsin-mines-shutting-down-laying-workers; https://dnr.wisconsin.gov/topic/Mines/Sand.html
22. LandBridge Company (NYSE: LB) — ~277,000 Permian surface acres; surface-use royalties and resource sales (frac sand + brackish water); IPO June 2024. https://landbridgeco.com/
23. U.S. Energy Information Administration, EIA Refines Estimates for Permian Tight Oil and Shale Gas Production (Permian 6.0M bbl/d crude, 22.2 Bcf/d gas), March 2026. https://www.eia.gov/todayinenergy/detail.php?id=67364
24. U.S. Energy Information Administration, U.S. Natural Gas Production Reached a New Record in 2025 (118.5 Bcf/d), March 2026. https://www.eia.gov/todayinenergy/detail.php?id=67345
25. U.S. Energy Information Administration, Short-Term Energy Outlook, July 2026 (crude 13.6→14.0M bbl/d; LNG exports 15.1→18.6 Bcf/d). https://www.eia.gov/outlooks/steo/report/index.php
26. Bureau of Land Management, About Mining and Minerals — Locatable, Leasable, and Saleable Minerals (Materials Act of 1947). https://www.blm.gov/programs/energy-and-minerals/mining-and-minerals/about
27. John T. Boyd Company / Smart Sand, Technical Report Summary — Oakdale Mine, Dec. 31, 2025 (228.3 Mt saleable; $23.08/ton modeled mine-level price). https://www.sec.gov/Archives/edgar/data/1529628/000152962826000006/smartsand-oakdaletrs.htm

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Federal facts are attributed to their primary sources (Census Economic Census 2022 and County Business Patterns 2023 for U.S. business statistics; USGS Mineral Commodity Summaries and EIA for physical production; SBA and MSHA for regulation). Company financials are from SEC filings and issuer releases. Trade-press pricing and logistics figures are labeled as secondary and treated cautiously. Forward-looking statements are identified as judgment, not sourced fact. Where our ingested federal data suppressed a metric (the HHI concentration index), no value is stated.