U.S. mines and quarries with 100 workers or more — page 2 of 2
343 operations reporting 100 workers or more, in alphabetical order.
1 · 2
| Place | Mine | Mine ID | Industry group | Status since |
|---|---|---|---|---|
| Charlevoix County, MI | St. Marys Cement-Charlevoix St. Marys Cement U.S. LLC | 2000038 | Stone | Mar 7, 1988 |
| Stillwater County, MT | STILLWATER MINE Stillwater Mining Company | 2401490 | Metal | May 15, 1987 |
| Logan County, WV | Stonecoal Branch Mine No. 2 Ramaco Resources, LLC | 4608663 | Coal | Dec 4, 2024 |
| Sevier County, UT | SUFCO CANYON FUEL COMPANY LLC | 4200089 | Coal | Nov 1, 1980 |
| Jackson County, MO | Sugar Creek Ug Mine Central Plains Cement Co | 2302171 | Stone | Oct 1, 2013 |
| Sumter County, FL | Sumterville Cement Plant Suwannee American Cement | 0801370 | Stone | May 26, 2010 |
| Reynolds County, MO | Sweetwater Mine/Mill Doe Run Company | 2300458 | Metal | Apr 4, 1988 |
| Hamilton County, FL | Swift Creek Mine White Springs Ag Chems Inc dba Nutrien | 0800798 | Nonmetal | Oct 28, 1985 |
| Sweetwater County, WY | Tata Chemicals Mine Tata Chemicals Soda Ash Partners LLC | 4800155 | Nonmetal | Feb 18, 1982 |
| Kern County, CA | Tehachapi Cement, LLC. UNACEM North America | 0400196 | Stone | Aug 16, 1976 |
| Hays County, TX | Texas-Lehigh Cement Plant & Quarry Texas Lehigh Cement Company LP | 4102781 | Stone | Jun 21, 1978 |
| Allen County, KS | The Monarch Cement Company | 1400124 | Stone | Jul 18, 1973 |
| Custer County, ID | Thompson Creek Mine Thompson Creek Mining Company | 1000531 | Metal | Sep 29, 2023 |
| Bernalillo County, NM | Tijeras Plant & Quarry GCC Rio Grande, Inc. | 2900013 | Stone | Jul 4, 1976 |
| Marquette County, MI | Tilden Mine Tilden Mining Company, LC. | 2000422 | Metal | Nov 22, 1978 |
| Ste Genevieve County, MO | Tower Rock St Co St Genevieve Fa Tower Rock Stone Company | 2300781 | Stone | May 20, 1974 |
| Rogers County, OK | Tulsa Plant Central Plains Cement Co. | 3400026 | Stone | Mar 3, 2005 |
| Ohio County, WV | TUNNEL RIDGE MINE Tunnel Ridge, LLC | 4608864 | Coal | Jul 26, 2010 |
| Humboldt County, NV | Turquoise Ridge Nevada Gold Mines LLC | 2602286 | Metal | Mar 7, 2002 |
| Mingo County, WV | TWIN BRANCH NO 1 SURFACE COAL-MAC LLC. | 4609075 | Coal | Jul 20, 2020 |
| Humboldt County, NV | Twin Creeks Mine Nevada Gold Mines LLC | 2601942 | Metal | May 5, 1986 |
| Grant County, NM | TYRONE MINE Freeport-McMoRan Tyrone Inc | 2900159 | Metal | May 3, 2016 |
| Pendleton County, KY | Underground Black River Operation Carmeuse Lime and Stone Inc | 1500062 | Stone | Mar 5, 1979 |
| Carroll County, MD | UNION BRIDGE MD Heidelberg Materials US Cement LLC | 1800017 | Stone | May 30, 1979 |
| St Louis County, MN | United - Mine United Taconite LLC | 2103403 | Metal | Dec 18, 2003 |
| St Louis County, MN | United Plant United Taconite LLC | 2103404 | Metal | Feb 1, 2004 |
| Uintah County, UT | Vernal Pit & Mill Simplot Phosphates LLC | 4200998 | Nonmetal | Apr 2, 1992 |
| Rutland County, VT | VERPOL PLANT Omya Inc | 4300351 | Stone | Sep 21, 1983 |
| Winkler County, TX | Vest Plant Iron Oak Permian LLC | 4105326 | Sand and gravel | Oct 1, 2018 |
| San Bernardino County, CA | Victorville Cement Plant CEMEX Construction Materials Pacific, LLC | 0400281 | Stone | Mar 25, 1976 |
| Livingston County, KY | Warren Paving Slats Lucas Quarry Warren Paving Inc | 1519106 | Stone | Feb 27, 2009 |
| Sweetwater County, WY | WE Soda @ WESTVACO WE Soda Alkali, LLC | 4800152 | Nonmetal | Jul 4, 1976 |
| La Salle County, IL | Wedron Plant Wedron Silica LLC | 1101578 | Nonmetal | Jul 4, 1976 |
| Iberia County, LA | Weeks Island Mine and Mill Morton Salt Inc | 1600970 | Nonmetal | Jul 5, 1983 |
| Gunnison County, CO | West Elk Mine Mountain Coal Company, L.L.C. | 0503672 | Coal | Apr 19, 2002 |
| Miami-dade County, FL | WHITE ROCK QUARRIES | 0801058 | Stone | Dec 9, 1986 |
| Warrick County, IN | Wild Boar Mine Peabody Wild Boar Mining, LLC | 1202441 | Coal | Jan 5, 2011 |
| Boone County, WV | Winchester Peerless Rachel Mine Kanawha Eagle Mining, LLC | 4609258 | Coal | Apr 13, 2020 |
| Frederick County, VA | Winchester Plant O-N Minerals (Chemstone Company) | 4400044 | Stone | May 29, 1979 |
| Manatee County, FL | Wingate Creek Mine Mosaic Fertilizer, LLC | 0800981 | Nonmetal | May 30, 2007 |
| Raleigh County, WV | Workman Creek Surface Republic Energy LLC | 4609475 | Coal | Dec 23, 2013 |
| Jefferson County, GA | Wrens Plant KaMin LLC | 0900143 | Nonmetal | Sep 18, 1975 |
| Jefferson County, TN | Young Mine Crucible ETN LLC | 4000168 | Metal | Jan 19, 2007 |
Alphabetical order — this site ranks no one. Mines that are not abandoned in the MSHA file of October 2, 2026. Sole proprietors are found by mine ID only. How to read this.