Total US production—iSource: Sum of MSHA hours-based annual output across 11,284 active & intermittent mines in the Quarryme dataset. USGS Mineral Commodity Summaries 2025 reports 1.5 bn t of crushed stone + 0.9 bn t of construction sand & gravel produced in the US in 2024 (≈ 2.4 bn t aggregates total). Quarryme’s production rollup reflects only mines with reported hours/employee data.
Total US reserves—iSource: Estimated remaining tons across the same mine set, derived from MSHA-disclosed acreage, SEC 10-K reserve-life disclosures for the public producers (CRH, Vulcan, Martin Marietta, Heidelberg, Summit, Eagle, Knife River) and reserve-life * production proxies for the long tail. USGS Mineral Commodity Summaries (2025) characterizes US crushed-stone reserves as “Adequate, except where special types are needed or where local shortages exist” without publishing a national tonnage figure; the Quarryme number is the bottom-up sum across the dataset.