Coal production
0reported short tons
ACTIVE / CONTROLLER PORTFOLIO
Membership and operating status are from the latest MSHA Mines snapshot. Open a mine for its ownership history.
MINE PORTFOLIO
2025-01-01 – 2026-10-13. Active records; production reporting is not required.
Material, method and type filters apply to this table. The portfolio’s status applies to the entire page. GEM fields describe their own release, not the selected MSHA year.
| Mine | Location / type | Coal · short tons | Hours worked | Violations | Accident records | On-site inspection hours |
|---|---|---|---|---|---|---|
| 129th St. Plant #143401876 · Active2/8 quarters reported | Tulsa, OKSurface · MSHA: Construction Sand and Gravel | 0 | 3,295 | 4 | 0 | 10.3 |
| 132 Portable Crusher1002107 · Active6/8 quarters reported | Bonneville, IDSurface · MSHA: Construction Sand and Gravel | 0 | 10,798 | 1 | 0 | 22.0 |
| 133 Portable Crusher1001326 · Active6/8 quarters reported | Bonneville, IDSurface · MSHA: Crushed, Broken Sandstone | 0 | 27,848 | 10 | 0 | 48.0 |
| 134 Crusher H-K Portable Plant1001892 · Active6/8 quarters reported | Fremont, IDSurface · MSHA: Crushed, Broken Stone NEC | 0 | 35,178 | 12 | 1 | 55.0 |
| Alexander City0102140 · Active5/8 quarters reported | Coosa, ALSurface · MSHA: Crushed, Broken Granite | 0 | 43,023 | 5 | 0 | 25.5 |
| Allied Corporation Inc3302913 · Active6/8 quarters reported | Stark, OHSurface · MSHA: Construction Sand and Gravel | 0 | 22,542 | 7 | 0 | 23.5 |
| Allied Rock Portable Crusher #13503688 · Active6/8 quarters reported | Marion, ORSurface · MSHA: Crushed, Broken Stone NEC | 0 | 16,691 | 4 | 0 | 29.5 |
| Allied Rock Portable Crusher #23503775 · Active6/8 quarters reported | Marion, ORSurface · MSHA: Crushed, Broken Stone NEC | 0 | 4,653 | 1 | 0 | 23.3 |
| Allied Rock Portable Crusher #33503940 · Active6/8 quarters reported | Sherman, ORSurface · MSHA: Crushed, Broken Stone NEC | 0 | 12,609 | 6 | 0 | 20.8 |
| Ames Plant1301019 · Active6/8 quarters reported | Story, IASurface · MSHA: Construction Sand and Gravel | 0 | 11,601 | 4 | 0 | 32.5 |
| Arkhola Dredge & Plant0300379 · Active6/8 quarters reported | Crawford, ARSurface · MSHA: Construction Sand and Gravel | 0 | 92,782 | 8 | 2 | 75.0 |
| ARP Palisades4503042 · Active6/8 quarters reported | Douglas, WASurface · MSHA: Construction Sand and Gravel | 0 | 16,785 | 3 | 0 | 22.5 |
| ARP Portable Crusher #14503253 · Active6/8 quarters reported | Chelan, WASurface · MSHA: Construction Sand and Gravel | 0 | 39,805 | 13 | 0 | 32.5 |
| ARP Portable Crusher #24500764 · Active6/8 quarters reported | Douglas, WASurface · MSHA: Construction Sand and Gravel | 0 | 19,233 | 8 | 0 | 38.0 |
| Ash Grove Cement Company4100026 · Active6/8 quarters reported | Ellis, TXFacility · MSHA: Cement | 0 | 355,345 | 101 | 9 | 259.8 |
| Ash Grove Tooele Plant4202725 · Active6/8 quarters reported | Tooele, UTFacility · MSHA: Misc. Nonmetallic Mnls. NEC | 0 | 57,058 | 13 | 1 | 39.3 |
| Auburn Facility4501237 · Active6/8 quarters reported | King, WASurface · MSHA: Construction Sand and Gravel | 0 | 112,472 | 8 | 4 | 75.8 |
| Avoca Quarry & Plant0300437 · Active6/8 quarters reported | Benton, ARSurface · MSHA: Crushed, Broken Limestone NEC | 0 | 23,138 | 8 | 0 | 29.5 |
| BAILEY2200706 · Active6/8 quarters reported | Copiah, MSSurface · MSHA: Construction Sand and Gravel | 0 | 73,188 | 1 | 1 | 21.3 |
| Barriere West1601592 · Active6/8 quarters reported | Tangipahoa, LASurface · MSHA: Construction Sand and Gravel | 0 | 4,006 | 5 | 0 | 16.5 |
| Bassett Stone Company1500004 · Active6/8 quarters reported | Wayne, KYSurface · MSHA: Crushed, Broken Limestone NEC | 0 | 17,633 | 3 | 0 | 71.5 |
| Bath Plant3000214 · Active6/8 quarters reported | Steuben, NYSurface · MSHA: Crushed, Broken Limestone NEC | 0 | 16,621 | 1 | 0 | 32.5 |
| Bauer Pit4200884 · Active6/8 quarters reported | Tooele, UTSurface · MSHA: Construction Sand and Gravel | 0 | 37,802 | 20 | 2 | 34.0 |
| Bay Road Plant #70700059 · Active6/8 quarters reported | Kent, DESurface · MSHA: Construction Sand and Gravel | 0 | 7,998 | 1 | 0 | 26.5 |
| Beckley Plant4605147 · Active6/8 quarters reported | Raleigh, WVSurface · MSHA: Crushed, Broken Sandstone | 0 | 52,414 | 3 | 1 | 136.5 |
| Beck Street4201452 · Active6/8 quarters reported | Salt Lake, UTSurface · MSHA: Construction Sand and Gravel | 0 | 118,177 | 13 | 3 | 104.8 |
| Beef Hollow4202517 · Active6/8 quarters reported | Salt Lake, UTSurface · MSHA: Construction Sand and Gravel | 0 | 63,341 | 4 | 0 | 36.0 |
| Benton Plant2200826 · Active6/8 quarters reported | Yazoo, MSSurface · MSHA: Construction Sand and Gravel | 0 | 50,381 | 0 | 0 | 27.5 |
| Blackhawk Pit and Plant2200219 · Active6/8 quarters reported | Carroll, MSSurface · MSHA: Construction Sand and Gravel | 0 | 53,300 | 2 | 0 | 26.0 |
| Bluefield Plant4400096 · Active5/8 quarters reported | Tazewell, VASurface · MSHA: Crushed, Broken Limestone NEC | 0 | 85,113 | 2 | 3 | 86.8 |
| Blue Rock Quarry0400276 · Active6/8 quarters reported | Sonoma, CASurface · MSHA: Crushed, Broken Traprock | 0 | 19,887 | 4 | 0 | 46.5 |
| Boehler Pit2600429 · Active6/8 quarters reported | Elko, NVSurface · MSHA: Construction Sand and Gravel | 0 | 13,589 | 14 | 3 | 21.5 |
| Bonner Springs Quarry1401578 · Active6/8 quarters reported | Wyandotte, KSSurface · MSHA: Crushed, Broken Limestone NEC | 0 | 52,093 | 20 | 2 | 55.0 |
| Booneville West Plant1302503 · Active6/8 quarters reported | Dallas, IASurface · MSHA: Construction Sand and Gravel | 0 | 15,209 | 11 | 0 | 28.5 |
| Bourbon Limestone Company1518415 · Active6/8 quarters reported | Bourbon, KYUnderground · MSHA: Crushed, Broken Limestone NEC | 0 | 57,577 | 10 | 1 | 233.0 |
| Brickeys Quarry2302157 · Active6/8 quarters reported | Ste Genevieve, MOSurface · MSHA: Crushed, Broken Limestone NEC | 0 | 112,893 | 4 | 3 | 88.3 |
| BRIDGEVILLE PLANT #703000100 · Active6/8 quarters reported | Sullivan, NYSurface · MSHA: Crushed, Broken Stone NEC | 0 | 63,271 | 8 | 0 | 61.5 |
| Brigham City Pit4200398 · Active6/8 quarters reported | Box Elder, UTSurface · MSHA: Construction Sand and Gravel | 0 | 100,297 | 15 | 2 | 49.0 |
| BROCKPORT PLANT3000022 · Active6/8 quarters reported | Monroe, NYSurface · MSHA: Crushed, Broken Limestone NEC | 0 | 25,889 | 1 | 1 | 34.3 |
| BRUSHY CREEK STONE1519543 · Active6/8 quarters reported | Carter, KYSurface · MSHA: Crushed, Broken Limestone NEC | 0 | 44,020 | 7 | 0 | 147.5 |
| Burdick Portable #14202007 · Active6/8 quarters reported | Duchesne, UTSurface · MSHA: Construction Sand and Gravel | 0 | 8,682 | 8 | 0 | 46.3 |
| Burdick Portable #34202348 · Active5/8 quarters reported | Duchesne, UTSurface · MSHA: Construction Sand and Gravel | 0 | 967 | 0 | 0 | 13.5 |
| Burdick Portable #44202430 · Active6/8 quarters reported | Daggett, UTSurface · MSHA: Construction Sand and Gravel | 0 | 10,157 | 0 | 0 | 7.0 |
| Burdick Portable #54202460 · Active6/8 quarters reported | Emery, UTSurface · MSHA: Construction Sand and Gravel | 0 | 38,154 | 4 | 0 | 44.3 |
| BURDICK PORTABLE CRUSHER #24202214 · Active6/8 quarters reported | Duchesne, UTSurface · MSHA: Construction Sand and Gravel | 0 | 28,304 | 3 | 0 | 35.0 |
| C636-Sidney Crushing Facility1700002 · Active6/8 quarters reported | Kennebec, MESurface · MSHA: Crushed, Broken Limestone NEC | 0 | 42,702 | 1 | 0 | 20.8 |
| Candor Sand Pit3101354 · Active6/8 quarters reported | Montgomery, NCSurface · MSHA: Construction Sand and Gravel | 0 | 46,270 | 2 | 0 | 41.3 |
| Cape Sandy #11200084 · Active6/8 quarters reported | Crawford, INSurface · MSHA: Crushed, Broken Limestone NEC | 0 | 352,441 | 45 | 7 | 394.0 |
| Casey Stone Company1500012 · Active6/8 quarters reported | Casey, KYSurface · MSHA: Crushed, Broken Limestone NEC | 0 | 14,898 | 5 | 0 | 56.0 |
| Castlewood4407424 · Active5/8 quarters reported | Russell, VAFacility · MSHA: Lime | 0 | 75,589 | 24 | 2 | 178.0 |
| CASTLEWOOD PLANT4400165 · Active6/8 quarters reported | Russell, VASurface · MSHA: Crushed, Broken Limestone NEC | 0 | 26,779 | 2 | 0 | 126.5 |
| Cave Run Stone1507194 · Active6/8 quarters reported | Morgan, KYSurface · MSHA: Crushed, Broken Limestone NEC | 0 | 32,650 | 3 | 0 | 125.0 |
| CHANUTE QUARRY1400034 · Active6/8 quarters reported | Neosho, KSFacility · MSHA: Cement | 0 | 482,349 | 242 | 6 | 629.5 |
| Charlestown Quarry1201720 · Active6/8 quarters reported | Clark, INSurface · MSHA: Crushed, Broken Limestone NEC | 0 | 75,231 | 1 | 2 | 83.5 |
| Cherokee Co Quarry3102138 · Active6/8 quarters reported | Cherokee, NCSurface · MSHA: Crushed, Broken Granite | 0 | 45,510 | 2 | 0 | 59.8 |
| CLINTON POINT QUARRY & MILL3000082 · Active6/8 quarters reported | Dutchess, NYSurface · MSHA: Crushed, Broken Stone NEC | 0 | 370,425 | 157 | 11 | 444.5 |
| CLOVERHILL2200682 · Active6/8 quarters reported | Adams, MSSurface · MSHA: Construction Sand and Gravel | 0 | 32,138 | 8 | 0 | 30.3 |
| CO Crusher0503178 · Active6/8 quarters reported | Montezuma, COSurface · MSHA: Construction Sand and Gravel | 0 | 21,296 | 3 | 0 | 23.5 |
| Columbus Limestone3304657 · Active6/8 quarters reported | Franklin, OHSurface · MSHA: Crushed, Broken Limestone NEC | 0 | 189,456 | 70 | 5 | 318.5 |
| Conco Mobile Plant2302603 · Active2/8 quarters reported | Dallas, MOSurface · MSHA: Crushed, Broken Limestone NEC | 0 | 4,808 | 0 | 0 | 16.5 |
| Conco Quarries-Marshfield2301928 · Active6/8 quarters reported | Webster, MOSurface · MSHA: Crushed, Broken Limestone NEC | 0 | 19,667 | 4 | 0 | 35.5 |
| Conco Willard Quarries2300035 · Active6/8 quarters reported | Greene, MOSurface · MSHA: Crushed, Broken Limestone NEC | 0 | 95,943 | 22 | 0 | 72.3 |
| Coweta Plant #103400892 · Active6/8 quarters reported | Wagoner, OKSurface · MSHA: Construction Sand and Gravel | 0 | 32,280 | 4 | 1 | 25.0 |
| COXBURG SAND & GRAVEL2200740 · Active6/8 quarters reported | Yazoo, MSSurface · MSHA: Construction Sand and Gravel | 0 | 52,356 | 2 | 0 | 19.0 |
| CR100504887 · Active6/8 quarters reported | Mesa, COSurface · MSHA: Construction Sand and Gravel | 0 | 8,588 | 7 | 0 | 29.8 |
| CR30504231 · Active6/8 quarters reported | Delta, COSurface · MSHA: Construction Sand and Gravel | 0 | 10,281 | 9 | 1 | 38.0 |
| CR40504656 · Active6/8 quarters reported | Delta, COSurface · MSHA: Construction Sand and Gravel | 0 | 10,533 | 1 | 0 | 26.5 |
| CR50504739 · Active6/8 quarters reported | Garfield, COSurface · MSHA: Construction Sand and Gravel | 0 | 8,349 | 1 | 1 | 15.3 |
| CR60504740 · Active6/8 quarters reported | Garfield, COSurface · MSHA: Construction Sand and Gravel | 0 | 8,254 | 1 | 1 | 15.5 |
| CR70504835 · Active6/8 quarters reported | Montrose, COSurface · MSHA: Construction Sand and Gravel | 0 | 9,358 | 0 | 1 | 10.0 |
| CR80504836 · Active6/8 quarters reported | Montrose, COSurface · MSHA: Construction Sand and Gravel | 0 | 9,358 | 0 | 0 | 10.3 |
| CR90504888 · Active6/8 quarters reported | Mesa, COSurface · MSHA: Construction Sand and Gravel | 0 | 8,896 | 5 | 0 | 26.3 |
| Cranston Quarry3700002 · Active6/8 quarters reported | Providence, RISurface · MSHA: Crushed, Broken Stone NEC | 0 | 71,037 | 13 | 0 | 65.3 |
| CYD Cabbage Grove0801340 · Active6/8 quarters reported | Taylor, FLSurface · MSHA: Crushed, Broken Limestone NEC | 0 | 83,594 | 7 | 1 | 47.0 |
| Daniel's Plant4202368 · Active6/8 quarters reported | Wasatch, UTSurface · MSHA: Construction Sand and Gravel | 0 | 17,859 | 2 | 0 | 9.5 |
| Darling Mine0200181 · Active6/8 quarters reported | Coconino, AZSurface · MSHA: Misc. Metal Ore NEC | 0 | 10,034 | 12 | 0 | 31.3 |
| Denniston Quarry2002934 · Active6/8 quarters reported | Monroe, MISurface · MSHA: Crushed, Broken Limestone NEC | 0 | 49,644 | 1 | 0 | 37.0 |
| DICKENSONVILLE PLANT4407168 · Active6/8 quarters reported | Russell, VASurface · MSHA: Crushed, Broken Limestone NEC | 0 | 25,485 | 11 | 0 | 101.8 |
| Dillsboro Quarry3100557 · Active6/8 quarters reported | Jackson, NCSurface · MSHA: Crushed, Broken Granite | 0 | 64,036 | 1 | 0 | 83.0 |
| Divot Quarry4104879 · Active6/8 quarters reported | Frio, TXSurface · MSHA: Crushed, Broken Limestone NEC | 0 | 27,574 | 7 | 0 | 21.3 |
| DON C. RUSHING1504272 · Active6/8 quarters reported | Spencer, KYSurface · MSHA: Construction Sand and Gravel | 0 | 16,006 | 4 | 0 | 61.3 |
| Durkee Cement Plant3502970 · Active6/8 quarters reported | Baker, ORFacility · MSHA: Cement | 0 | 396,331 | 30 | 3 | 208.5 |
| EAST KINGSTON3003452 · Active6/8 quarters reported | Ulster, NYSurface · MSHA: Crushed, Broken Sandstone | 0 | 75,951 | 17 | 2 | 74.0 |
| East Petersburg Quarry3600023 · Active6/8 quarters reported | Lancaster, PASurface · MSHA: Crushed, Broken Limestone NEC | 0 | 61,436 | 14 | 0 | 70.5 |
| East Quarry3400050 · Active6/8 quarters reported | Tulsa, OKSurface · MSHA: Crushed, Broken Limestone NEC | 0 | 135,138 | 27 | 3 | 105.5 |
| East Valley4503744 · Active6/8 quarters reported | Yakima, WASurface · MSHA: Construction Sand and Gravel | 0 | 23,420 | 13 | 0 | 42.5 |
| Evans No 1 Pit4801141 · Active6/8 quarters reported | Teton, WYSurface · MSHA: Construction Sand and Gravel | 0 | 33,042 | 7 | 1 | 35.3 |
| Ewing Stone4400234 · Active6/8 quarters reported | Lee, VASurface · MSHA: Crushed, Broken Limestone NEC | 0 | 18,027 | 0 | 0 | 44.5 |
| FIDDLERS NORTH QUARRY3608187 · Active6/8 quarters reported | Dauphin, PASurface · MSHA: Crushed, Broken Stone NEC | 0 | 45,580 | 2 | 0 | 46.8 |
| Foreman Quarry & Plant0300256 · Active6/8 quarters reported | Little River, ARFacility · MSHA: Cement | 0 | 553,328 | 125 | 10 | 294.0 |
| Forsyth Quarry0901035 · Active6/8 quarters reported | Forsyth, GASurface · MSHA: Crushed, Broken Granite | 0 | 64,051 | 16 | 0 | 81.3 |
| Franklinton Crusher Plant1601177 · Active6/8 quarters reported | Washington, LASurface · MSHA: Construction Sand and Gravel | 0 | 4,779 | 4 | 0 | 38.3 |
| Fultonham Plant3300042 · Active6/8 quarters reported | Muskingum, OHUnderground · MSHA: Crushed, Broken Limestone NEC | 0 | 85,565 | 31 | 6 | 391.8 |
| Glade Stone Plant4400164 · Active6/8 quarters reported | Washington, VASurface · MSHA: Crushed, Broken Limestone NEC | 0 | 59,720 | 1 | 0 | 95.5 |
| Goins Hollow Quarry4003343 · Active6/8 quarters reported | Claiborne, TNSurface · MSHA: Crushed, Broken Limestone NEC | 0 | 12,259 | 3 | 0 | 39.3 |
| Golden Gate Quarry0800526 · Active6/8 quarters reported | Collier, FLSurface · MSHA: Crushed, Broken Limestone NEC | 0 | 83,413 | 6 | 0 | 45.8 |
| Gore Quarry3401713 · Active6/8 quarters reported | Sequoyah, OKSurface · MSHA: Crushed, Broken Limestone NEC | 0 | 146,942 | 14 | 9 | 56.8 |
| Gorham Sand & Gravel C6192700061 · Active6/8 quarters reported | Coos, NHSurface · MSHA: Construction Sand and Gravel | 0 | 5,110 | 1 | 0 | 13.0 |
| GOSHEN QUARRY3000038 · Active6/8 quarters reported | Orange, NYSurface · MSHA: Crushed, Broken Stone NEC | 0 | 24,616 | 6 | 0 | 33.5 |
| Gravette Quarry0302012 · Active6/8 quarters reported | Benton, ARSurface · MSHA: Crushed, Broken Limestone NEC | 0 | 72,332 | 16 | 2 | 50.8 |
Production and hours sum available quarterly reports. — means unavailable; zero safety records means none in the selected imported period. Ownership reflects the current MSHA record.
LOCATION
260 of 260 mines with usable MSHA coordinates. Select a marker to open a mine.
2025 Q1 – 2026 Q4
Database snapshot · 2026-10-13. All 260 mines listed under this controller were checked; 260 have reports in the available quarters. Totals use current ownership.
reported short tons
reported employee hours
production ÷ hours worked
Missing values appear as —. Totals use available reports. Tons per hour requires production and hours for the same quarters and a nonzero hours total. * Striped bars mark partial mine coverage or an incomplete quarter. See the table for coverage.
| Quarter | Coal (short tons) | Hours worked | Tons / hour | Avg. employees | Coverage |
|---|---|---|---|---|---|
| 2025 Q1 | 0 | 2,634,530 | 0.00 | 5,320 | 257/260 mines reporting |
| 2025 Q2 | 0 | 3,032,447 | 0.00 | 5,737 | 257/260 mines reporting |
| 2025 Q3 | 0 | 3,079,868 | 0.00 | 5,794 | 257/260 mines reporting |
| 2025 Q4 | 0 | 2,851,451 | 0.00 | 5,611 | 256/260 mines reporting |
| 2026 Q1 | 0 | 2,583,727 | 0.00 | 5,438 | 259/260 mines reporting |
| 2026 Q2 | 0 | 3,024,478 | 0.00 | 5,783 | 259/260 mines reporting |
| 2026 Q3 | — | — | — | — | No report |
| 2026 Q4 | — | — | — | — | No report |
2025-01-01 – 2026-10-13
410 significant & substantial (S&S)
1 records classified as fatality
2,803 of 2,918 violations with amounts
1,350 inspections · 1,350 with hours
Counts are published records, including contractor records. * The quarter was incomplete at the snapshot date; recent counts may rise as reports arrive. — means no reported amount or hours. Portfolio totals use current membership.
| Quarter | Violations | S&S | Proposed USD | Accident records | Fatality records | Inspections | On-site hours |
|---|---|---|---|---|---|---|---|
| 2025-Q1 | 382 | 50 | 282,393.00 | 32 | 0 | 176 | 2,206.8 |
| 2025-Q2 | 461 | 50 | 341,165.00 | 45 | 0 | 185 | 2,948.8 |
| 2025-Q3 | 383 | 47 | 129,039.00 | 43 | 0 | 219 | 2,226.0 |
| 2025-Q4 | 405 | 70 | 408,730.00 | 34 | 0 | 166 | 2,654.3 |
| 2026-Q1 | 383 | 55 | 401,478.00 | 38 | 1 | 182 | 2,126.0 |
| 2026-Q2 | 559 | 81 | 594,555.00 | 42 | 0 | 211 | 3,536.0 |
| 2026-Q3 | 325 | 49 | 181,726.00 | 42 | 0 | 194 | 2,116.8 |
| 2026-Q4 * | 20 | 8 | — | 0 | 0 | 17 | 79.0 |
All violations issued in the selected period. Counts combine subsections.
Regular Safety and Health Inspection · 0.0 on-site hours
Regular Safety and Health Inspection · 0.0 on-site hours
Regular Safety and Health Inspection · 5.0 on-site hours
56.14107(a)
46.7(a) · S&S
57.20003(a) · S&S
48.28(a)
56.11002
56.11003
56.4101
Regular Safety and Health Inspection · 0.0 on-site hours
Impoundment Spot Inspection · 0.0 on-site hours
Regular Safety and Health Inspection · 0.0 on-site hours
46.9(a)
56.12004
56.20003(a)
56.14101(a)(2) · S&S
56.4402
56.11001 · S&S
56.15005 · S&S
103 (g) Written Notification Hazard Complaint Inspectio · 4.5 on-site hours
Verbal Hazard Complaint Inspections · 4.5 on-site hours
Regular Safety and Health Inspection · 8.0 on-site hours
Regular Safety and Health Inspection · 0.0 on-site hours
Regular Safety and Health Inspection · 26.0 on-site hours
MSHA Violations (issue date), Accidents (accident date), and Inspections (begin date). Snapshot 2026-10-13.
Counts describe published rows, including contractor records; accident records are not distinct incidents or numbers of people injured.
Zero means no matching records in the imported sources, not proof of no events. Historical coverage differs by source; absence before a source begins reporting is not a zero incident rate. Invalid or absent dates and records after the snapshot are excluded.
S&S means SIG_SUB=Y. Fatality records use DEGREE_INJURY_CD=01. Proposed penalties are not final assessed or paid amounts; missing dollar values are omitted.
Inspection hours are SUM_TOTAL_ON_SITE_HOURS attributed to the inspection start date, without supervisor/trainee hours. Missing hours are omitted; a started inspection may still be open.
Portfolio totals use current mine membership, including events before the current owner or operator's tenure.
CFR headings link to the current Title 30 index; they are not historical legal determinations.
SELECTED PORTFOLIO
Relationships reflect the selected mine status and current MSHA controller/operator fields.