Data / Mines / Stone mines

Stone mines in the US: 4,501 open mines and MSHA citations

Name: Stone mines
Creator: SpecStream
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MSHA lists 4,501 open stone mines in the US, run by 2,300 operators and employing 61,378 people. Since January 1, 2022 its inspectors issued 99,381 citations and orders there with $69,565,910 in proposed penalties, and operators reported 7,186 injury or illness cases, 61 of them fatal. The operators with the most open mines are Martin Marietta Materials, Inc.; Vulcan Construction Materials, LLC; Rogers Group Inc. Data from MSHA, November 6, 2026.

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Open mines: 4,501
Operators: 2,300
Employees: 61,378
Active: 2,881
Intermittent: 1,462
Temporarily Idled: 134
NonProducing: 13
New Mine: 11
Mines run by individuals, counted and not listed: 286
Citations and orders since January 1, 2022: 99,381
Significant and substantial: 17,446 (17.6%)
Closure orders: 2,064
High negligence or reckless: 6,006
Proposed penalties: $69,565,910
Amount paid so far: $52,320,827
Inspections: 49,834
Inspector hours on site: 568,771
Citations per inspection: 1.99 (all mines 2.30)
Accident reports: 7,612
Injury and illness cases: 7,186
Fatalities: 61
Latest MSHA record: November 5, 2026

Operators with the most open mines

Ranked by open mines, then by citations. Sole proprietors and individuals are not listed.

Operator	Open mines	Employees	Citations since 2022	Proposed penalties	Injury cases
Martin Marietta Materials, Inc.	188	4,015	3,469	$1,472,523	343
Vulcan Construction Materials, LLC	172	3,521	1,411	$480,803	339
Rogers Group Inc	69	806	1,004	$305,135	64
Heidelberg Materials Northeast LLC	39	535	1,003	$672,935	68
Heidelberg Materials Midwest Agg, Inc.	37	684	1,587	$1,065,082	63
New Enterprise Stone and Lime Co., Inc.	33	431	722	$161,927	74
River City Stone Division Of Mathy Construction Co	32	91	69	$17,630	11
Heidelberg Materials Southeast Agg., LLC	23	397	367	$99,485	54
Arkhola Sand & Gravel Company	22	217	335	$88,235	48
Chesapeake Materials (division/Luck Stone Corp.)	21	402	111	$21,687	22
Knife River Corporation Northwest	18	121	125	$122,197	18
Central Stone Company	17	226	207	$226,637	51
Wendling Quarries Inc	17	65	110	$18,116	12
Bluegrass Materials Company, LLC	16	273	116	$18,936	17
SRM Materials, LLC	15	148	253	$65,395	11
Martin Marietta Southeast Agg Operations, LLC	15	174	81	$23,047	20
Holcim (US) Incorporated	14	2,028	4,143	$8,239,542	228
Bruening Rock Products Inc	14	73	87	$20,863	0
National Lime & Stone Co.	13	220	307	$70,160	38
US Aggregates LLC	13	156	303	$237,101	25
Imi Aggregates LLC	13	211	290	$120,046	28
Midsouth Aggregates	13	144	151	$35,382	19
Capital Quarries Company Inc	13	65	96	$18,333	21
Mc Cullough Crushing Inc	13	21	81	$17,038	0
Meshoppen Stone Inc	13	93	65	$12,002	0
Yahara Materials Inc	13	52	62	$9,676	0
A B E Materials	12	160	169	$28,826	46
Cold Spring Granite Company	12	111	85	$20,634	33
Thompson Materials	12	27	40	$4,985	0
Pennsy Supply Inc	11	192	337	$140,557	22
Mid-States Materials, LLC	11	97	175	$48,638	4
Martin Marietta Materials Southwest, LLC	11	393	173	$57,036	22
Hinkle Contracting Company LLC	11	81	130	$30,643	3
Appalachian Aggregates, LLC	11	136	127	$40,499	18
Melvin Stone Company Llc	11	70	77	$12,927	11
Glenn O Hawbaker Inc	11	104	47	$7,093	10
Cemex Construction Materials Florida, LLC	10	680	785	$1,805,802	59
CalPortland Company	10	550	759	$801,082	81
Central Pre-Mix Concrete Co.	10	64	90	$22,252	15
Schildberg Construction Company Inc	10	94	73	$15,810	9
Michels Road & Stone, Inc.	10	31	52	$9,354	3
Capital Materials, LLC	10	71	45	$10,389	12
Ash Grove Cement Company	9	961	1,975	$2,809,100	144
Dolese Brothers Company	9	319	261	$98,547	53
Cornejo & Sons LLC	9	73	122	$57,473	5
Buechel Stone Corp	9	218	108	$26,047	23
Pike Industries	9	71	76	$19,465	17
Csa Materials Inc	9	59	72	$39,382	6
Independence Excavating, Inc.	9	55	71	$10,467	3
Georgia Stone Management LLC	9	34	61	$169,045	3
Lehigh Cement Company LLC	8	996	2,146	$4,206,259	115
Tilcon New York Inc	8	296	555	$468,450	76
Heidelberg Materials Southwest LLC	8	296	421	$357,273	50
Rock Pros USA	8	45	305	$245,082	1
Shelly Materials Inc	8	159	227	$80,371	20
Magruder Limestone Co Inc	8	44	130	$22,652	18
Eureka Stone Quarry Inc	8	69	127	$25,753	7
Barrett Paving Materials Inc	8	61	113	$26,555	15
Fay & Wright Excavating Inc	8	22	113	$21,815	0
Allegheny Mineral Corp	8	140	100	$15,677	12
Holliday Sand & Gravel Company, Inc.	8	81	98	$37,386	6
Stoneco Inc	8	104	78	$16,632	13
Halquist Stone Company Inc	8	88	40	$6,656	22
Eurovia Atlantic Coast LLC	8	38	34	$5,701	5
Amrize Mid-America Inc.	7	125	484	$179,993	14
Mulzer Crushed Stone Inc	7	245	275	$203,943	35
NM Energy LLC	7	40	212	$69,868	1
Peckham Materials Corp	7	82	179	$38,464	7
Vcna Prairie LLC	7	37	139	$31,877	12
RiverStone Group Inc	7	61	125	$26,173	15
L R Falk Construction Company	7	28	92	$17,182	8
Dolomite Group	7	87	67	$13,850	19
BMC Aggregates LC	7	48	65	$10,111	11
Bluebird Stone	7	50	25	$3,507	0
C.J. Moyna & Sons LLC	7	17	18	$3,591	4
Jones Bros. Contractors, LLC	7	38	17	$3,199	0
Quikrete Construction Materials, LLC	6	638	1,341	$2,423,487	83
Carmeuse Lime & Stone Inc	6	539	1,168	$1,319,282	75
Espinoza Stone Inc.	6	50	224	$201,771	0
Scotty's Contracting & Stone, LLC	6	66	181	$29,772	9
South Texas Aggregates Inc	6	21	154	$161,947	11
Ronnie Duffield Gravel Company	6	55	138	$25,081	2
United Materials, LLP	6	21	136	$102,336	5
Aggregate Industries Northeast Region Inc	6	74	133	$51,943	4
Eden Stone Co., LLC	6	105	105	$188,695	13
Payne & Dolan Inc	6	57	82	$14,249	14
Douds Stone, LLC	6	38	78	$14,373	3
DelHur Industries, Inc.	6	18	74	$124,167	2
Harshman Construction L L C	6	40	73	$15,798	0
Tilcon Connecticut Inc.	6	69	71	$11,676	16
Eastern Oklahoma Stone LLC	6	40	66	$9,877	0
Indian Creek Materials	6	26	63	$9,011	2
Florida Rock Industries Inc	6	195	61	$31,117	28
Vulcan Materials Asphalt and Construction, LLC	6	53	44	$14,096	3
Kernen Construction	6	11	27	$5,398	0
Gerke Excavating Inc	6	16	20	$2,996	1
Interstate Concrete and Asphalt Company	6	22	15	$8,516	1
H.B. Mellott Estate, Inc.	6	17	11	$1,381	3
MLC	5	692	865	$865,253	75
Amrize South Central Inc.	5	161	542	$491,645	24

Operators with the most citations

Citations and orders issued since January 1, 2022 at their open mines here.

Operator	Open mines	Employees	Citations since 2022	Proposed penalties	Injury cases
Holcim (US) Incorporated	14	2,028	4,143	$8,239,542	228
Martin Marietta Materials, Inc.	188	4,015	3,469	$1,472,523	343
Lehigh Cement Company LLC	8	996	2,146	$4,206,259	115
Ash Grove Cement Company	9	961	1,975	$2,809,100	144
Heidelberg Materials Midwest Agg, Inc.	37	684	1,587	$1,065,082	63
Vulcan Construction Materials, LLC	172	3,521	1,411	$480,803	339
Quikrete Construction Materials, LLC	6	638	1,341	$2,423,487	83
Buzzi Unicem USA	4	627	1,284	$2,711,147	105
Carmeuse Lime & Stone Inc	6	539	1,168	$1,319,282	75
Rogers Group Inc	69	806	1,004	$305,135	64
Heidelberg Materials Northeast LLC	39	535	1,003	$672,935	68
Continental Cement Company, LLC	3	529	950	$965,278	49
MLC	5	692	865	$865,253	75
St. Marys Cement U.S. LLC	2	305	836	$1,255,456	37
Cemex Construction Materials Florida, LLC	10	680	785	$1,805,802	59
CalPortland Company	10	550	759	$801,082	81
New Enterprise Stone and Lime Co., Inc.	33	431	722	$161,927	74
Cemex Construction Materials South LLC	4	348	693	$1,030,247	50
Specialty Minerals Inc	4	250	689	$294,642	31
Central Plains Cement Co	1	123	567	$576,547	11
Tilcon New York Inc	8	296	555	$468,450	76
Amrize South Central Inc.	5	161	542	$491,645	24
Amrize Mid-America Inc.	7	125	484	$179,993	14
Imerys Carbonates USA, Inc.	5	473	480	$443,315	22
3M Company	5	420	458	$488,183	120
National Cement Co. of AL., Inc.	1	120	444	$976,056	55
Huber Carbonates LLC.	4	251	435	$177,431	49
Heidelberg Materials Southwest LLC	8	296	421	$357,273	50
Heildelberg Materials	1	183	411	$1,151,628	35
Cemex Construction Materials Pacific, LLC	3	273	407	$395,502	31

Mines with the most citations

Open mines, ranked by citations and orders since January 1, 2022.

Mine	Operator	County	Main commodity	Employees	Citations since 2022
MLC, Ste. Genevieve	MLC	Ste Genevieve County, MO	Lime	586	749
Amrize Portland Plant	Holcim (US) Incorporated	Fremont County, CO	Cement	175	644
Martinsburg	Quikrete Construction Materials, LLC	Berkeley County, WV	Cement	141	614
Mason City Plant	Lehigh Cement Company LLC	Cerro Gordo County, IA	Cement	143	592
Hannibal Underground	Continental Cement Company, LLC	Ralls County, MO	Cement	141	589
Sugar Creek Ug Mine	Central Plains Cement Co	Jackson County, MO	Cement	123	567
St. Marys Cement-Charlevoix	St. Marys Cement U.S. LLC	Charlevoix County, MI	Cement	214	548
Maryneal Quarry and Mill	Buzzi Unicem USA	Nolan County, TX	Cement	134	534
Brooksville South Cement Plant	Cemex Construction Materials Florida, LLC	Hernando County, FL	Cement	199	524
Amrize Alpena Plant	Holcim (US) Incorporated	Alpena County, MI	Cement	264	489
Amrize Ravena Plant	Holcim (US) Incorporated	Albany County, NY	Cement	189	488
Nazareth Plant I	Lehigh Cement Company LLC	Northampton County, PA	Cement	159	487
Amrize Theodore Plant	Holcim (US) Incorporated	Mobile County, AL	Cement	183	486
Amrize Holly Hill Plant	Holcim (US) Incorporated	Orangeburg County, SC	Cement	176	480
Mitchell Plant	Lehigh Cement Company LLC	Lawrence County, IN	Cement	120	452
Buffington Plant	Carmeuse Lime & Stone Inc	Lake County, IN	Lime	52	451
Louisville Plant Quarry & Mill	Ash Grove Cement Company	Cass County, NE	Cement	111	450
National Cement Company	National Cement Co. of AL., Inc.	St Clair County, AL	Cement	120	444
Chanute Quarry	Ash Grove Cement Company	Neosho County, KS	Cement	162	430
HM Southeast Cement	Heildelberg Materials	Dorchester County, SC	Cement	183	411
Underground Black River Operation	Carmeuse Lime & Stone Inc	Pendleton County, KY	Crushed, broken limestone	204	401
Graymont (PA) Inc. Pleasant Gap	Graymont (Pa) Inc	Centre County, PA	Lime	147	385
Kosmos Cement Plant	Kosmos Cement Company, LLC	Jefferson County, KY	Cement	141	370
Seattle Plant	Ash Grove Cement Company	King County, WA	Cement	83	357
Foreman Quarry & Plant	Ash Grove Cement Company	Little River County, AR	Cement	168	341
Lebec Cement Plant	National Cement Company of California Inc	Kern County, CA	Cement	112	334
Balcones Plant	Cemex Construction Materials South LLC	Comal County, TX	Cement	85	334
Adams	Specialty Minerals Inc	Berkshire County, MA	Crushed, broken limestone	130	332
Selma Plant Quarry & Mill	River Cement Company DBA Buzzi Unicem USA	Jefferson County, MO	Cement	150	324
Clinton Point Quarry & Mill	Tilcon New York Inc	Dutchess County, NY	Crushed, broken stone	108	318
Amrize Three Rivers Quarry	Amrize South Central Inc.	Livingston County, KY	Crushed, broken limestone	45	312
Amrize Midlothian Plant	Holcim (US) Incorporated	Ellis County, TX	Cement	151	311
GCC Dacotah Inc	GCC Dacotah Inc	Pennington County, SD	Cement	108	311
St Marys Cement-Detroit	St. Marys Cement U.S. LLC	Wayne County, MI	Cement	91	288
Lone Star Pryor PLT Mill & Qy	Buzzi Unicem USA	Mayes County, OK	Cement	115	282
Lone Star Industries	Buzzi Unicem USA	Putnam County, IN	Cement	198	281
Mojave Plant & Quarry	CalPortland Company	Kern County, CA	Cement	133	276
Texas-Lehigh Cement Plant & Quarry	Texas Lehigh Cement Company LP	Hays County, TX	Cement	145	275
Newberry Cement Plant	Quikrete Construction Materials, LLC	Alachua County, FL	Crushed, broken limestone	110	262
3M Little Rock Industrial Mineral Prod	3M Company	Pulaski County, AR	Crushed, broken granite	125	258
Lyons Cement Plant Cemex Inc	Cemex Construction Materials South LLC	Boulder County, CO	Cement	89	257
Tulsa Plant	Central Plains Cement Co.	Rogers County, OK	Cement	121	256
Linwood Mine	Linwood Mining and Minerals Corporation	Scott County, IA	Crushed, broken limestone	47	256
Harleyville Mine & Plant	Quikrete Construction Materials, LLC	Dorchester County, SC	Cement	130	252
Pueblo Plant & Quarry	GCC Rio Grande Inc	Pueblo County, CO	Cement	82	250
Black Mountain Quarry	Cemex Construction Materials Pacific, LLC	San Bernardino County, CA	Cement	133	244
Hercules Cement LP	Buzzi Unicem USA	Northampton County, PA	Cement	125	238
Amrize Joppa Plant	Holcim (US) Incorporated	Massac County, IL	Cement	73	232
Logansport Cement Plant	Lehigh Cement Company LLC	Cass County, IN	Cement	96	229
Clinchfield Plant	Cemex Southeast, LLC	Houston County, GA	Cement	133	225
Amrize Ste Genevieve Plant	Holcim (US) Incorporated	Ste Genevieve County, MO	Cement	256	222
Redding Plant	CalPortland Company	Shasta County, CA	Cement	73	222
Keystone Cement Company	Keystone Cement Company	Northampton County, PA	Cement	124	218
Mountain Cement Company	Mountain Cement Company LLC	Albany County, WY	Cement	127	217
Drake Cement	Drake Cement LLC	Yavapai County, AZ	Cement	111	215
Amrize Hagerstown Facility	Holcim (US) Incorporated	Washington County, MD	Cement	106	213
Canaan	Specialty Minerals Inc	Litchfield County, CT	Crushed, broken limestone	33	212
LaSalle Quarry and Mill	Illinois Cement Company	La Salle County, IL	Cement	123	211
Ash Grove Cement Company	Ash Grove Cement Company	Ellis County, TX	Cement	124	207
Davenport Plant	Continental Cement Company, LLC	Scott County, IA	Cement	114	205
Boone Quarry	Rogers Group Inc	Gallatin County, KY	Crushed, broken limestone	54	205
Amrize Whitehall Plant	Holcim (US) Incorporated	Lehigh County, PA	Cement	80	203
Romesburg Quarry	Garrett Limestone Company Inc	Somerset County, PA	Crushed, broken limestone	13	189
Lone Star Quarry & Mill	Buzzi Unicem USA	Cape Girardeau County, MO	Cement	180	187
Michel Mine	Huber Carbonates LLC.	Burnet County, TX	Crushed, broken limestone	10	183
Glen Mills	Heidelberg Materials Northeast LLC	Delaware County, PA	Crushed, broken granite	32	181
Cushenbury Plant	Mitsubishi Cement Corp	San Bernardino County, CA	Cement	160	179
Trap Rock and Granite Quarries, LLC	Trap Rock and Granite Quarries	Iron County, MO	Crushed, broken granite	42	178
The Monarch Cement Company	Monarch Cement Company	Allen County, KS	Cement	133	173
Tehachapi Cement, LLC.	Unacem North America	Kern County, CA	Cement	101	173
Kremlin Plant	Specialty Granules LLC	Marinette County, WI	Crushed, broken traprock	118	172
Neely's Landing Quarry	The Southern Stone Company, LLC	Cape Girardeau County, MO	Crushed, broken limestone	30	172
Roanoke Cement Company	Roanoke Cement Co., LLC	Botetourt County, VA	Cement	132	170
Imerys Sylacauga Operations	Imerys Carbonates USA, Inc.	Talladega County, AL	Crushed, broken marble	280	169
Argos Roberta Plant	Quikrete Construction Materials, LLC	Shelby County, AL	Cement	169	169
Miami Cement Plant	Cemex Construction Materials Florida, LLC	Miami-Dade County, FL	Cement	136	168
Amrize Ada Plant	Holcim (US) Incorporated	Pontotoc County, OK	Cement	155	166
Pennsuco Cement Plant	Titan Florida LLC	Miami-Dade County, FL	Cement	127	163
Cricket Mountain Plant & Quarry	Graymont Western US Inc	Millard County, UT	Lime	74	163
Verpol Plant	Omya Inc	Rutland County, VT	Lime	120	162
Demopolis Plant Cemex Inc	Cemex Southeast, LLC	Marengo County, AL	Cement	98	162
Leeds Plant	Lehigh Cement Company LLC	Jefferson County, AL	Cement	128	160
Knoxville Cement Plant	Cemex Const Materials Atlantic, LLC	Knox County, TN	Cement	147	159
Maysville Mine	Carmeuse Lime & Stone Inc	Mason County, KY	Crushed, broken limestone	116	159
New York Mine	Imerys Carbonates USA, Inc.	Pickens County, GA	Crushed, broken marble	103	159
Amrize The R S & D Mine	Amrize Mid-America Inc.	Kane County, IL	Crushed, broken limestone	21	158
Midlothian Quarry and Plant	Continental Cement Company, LLC	Ellis County, TX	Cement	274	156
Kentner Creek Underground	West Plains Mining LLC	Wabash County, IN	Crushed, broken limestone	42	156
Amrize Marblehead Aggregates	Amrize Great Lakes Inc.	Ottawa County, OH	Crushed, broken limestone	54	154
Aa Quarry LLC	Aa Quarry LLC	Johnson County, MO	Crushed, broken limestone	22	154
Tower Rock St Co St Genevieve Fa	Tower Rock Stone Company	Ste Genevieve County, MO	Crushed, broken limestone	170	152
Sandusky Quarry	Heidelberg Materials Midwest Agg, Inc.	Erie County, OH	Crushed, broken limestone	40	150
Rapid City Quarry & Mill	Colorado Lien Company	Pennington County, SD	Lime	109	149
Victorville Cement Plant	Cemex Construction Materials Pacific, LLC	San Bernardino County, CA	Cement	126	148
Salado USA	BC3B Salado Operations, LLC	Williamson County, TX	Dimension stone	22	148
Georgetown Qy & Plt	Texas Crushed Stone Company Inc	Williamson County, TX	Crushed, broken limestone	144	146
Oro Grande Quarry	CalPortland Company	San Bernardino County, CA	Cement	137	146
Martin Marietta, Woodville Lime & Stone	Martin Marietta Materials, Inc.	Sandusky County, OH	Lime	116	145
Union Bridge MD	Lehigh Cement Company LLC	Carroll County, MD	Cement	175	142
Monon Quarry	Heidelberg Materials Midwest Agg, Inc.	White County, IN	Crushed, broken limestone	8	142

Main commodities

Main commodity	Open mines	Share
Crushed, broken limestone	1,950	43.3%
Crushed, broken stone	956	21.2%
Dimension stone	355	7.9%
Crushed, broken granite	320	7.1%
Crushed, broken sandstone	160	3.6%
Dimension sandstone	158	3.5%
Dimension limestone	157	3.5%
Cement	99	2.2%
Crushed, broken traprock	96	2.1%
Lime	73	1.6%
Dimension granite	54	1.2%
Dimension slate	34	0.8%
Crushed, broken basalt	30	0.7%
Crushed, broken slate	15	0.3%
Crushed, broken marble	10	0.2%

States

State	Open mines	Share
Texas	428	9.5%
Pennsylvania	361	8%
Tennessee	242	5.4%
Missouri	226	5%
Wisconsin	214	4.8%
New York	189	4.2%
Oregon	178	4%
Oklahoma	148	3.3%
Ohio	129	2.9%
Iowa	128	2.8%
North Carolina	126	2.8%
Indiana	119	2.6%
Illinois	116	2.6%
Kansas	114	2.5%
Georgia	112	2.5%

Citations and injury cases by year

Calendar years since 2022; 2026 runs to the date of the MSHA files.

Year	Citations and orders	Significant and substantial	Proposed penalties	Injury and illness cases
2022	19,402	3,553	$12,687,497	1,441
2023	22,007	4,147	$17,725,994	1,488
2024	21,749	3,660	$16,824,890	1,551
2025	19,280	3,249	$13,110,114	1,430
2026	16,943	2,837	$9,217,415	1,276

Standards cited most at stone mines

Sections of Title 30 of the Code of Federal Regulations named on the citations, with the part each belongs to.

Standard	What the part covers	Citations
30 CFR 56.20003	Surface metal and nonmetal mines	7,839
30 CFR 56.14100	Surface metal and nonmetal mines	7,582
30 CFR 56.14107	Surface metal and nonmetal mines	5,349
30 CFR 56.12004	Surface metal and nonmetal mines	5,236
30 CFR 56.14112	Surface metal and nonmetal mines	4,914
30 CFR 56.14132	Surface metal and nonmetal mines	3,334
30 CFR 56.12032	Surface metal and nonmetal mines	3,250
30 CFR 50.30	Reporting of accidents, injuries and illnesses	2,965
30 CFR 56.11001	Surface metal and nonmetal mines	2,934
30 CFR 56.4201	Surface metal and nonmetal mines	2,574
30 CFR 56.12028	Surface metal and nonmetal mines	2,314
30 CFR 56.9300	Surface metal and nonmetal mines	1,920
30 CFR 56.12008	Surface metal and nonmetal mines	1,762
30 CFR 56.14101	Surface metal and nonmetal mines	1,713
30 CFR 56.12018	Surface metal and nonmetal mines	1,548

Injury and illness cases at stone mines

Accident reports by degree of injury, as the operator reported them to MSHA.

Degree	Cases
Fatality	61
Permanent disability	91
Days away from work or restricted activity	4,688
No lost time, or an occupational illness	2,346

What the accident reports at stone mines describe

Accident classification, as MSHA codes the circumstances that contributed most directly.

Classification	Reports
Handling of materials	2,398
Slip or fall of person	1,507
Handtools (nonpowered)	987
Machinery	854
Powered haulage	578
Other	336
Disorders (repeated trauma)	148
Fire	128
Stepping or kneeling on object	117
Entrapment	79

Equipment named in accident reports at stone mines

Equipment	Reports
Hand tools (not powered)	1,020
Front-end loader	363
Hand tools (powered)	331
Ore haulage trucks - off highway trucks	291
Crusher	155
Shovel	134
Conveyor	134
Trucks	130
Welding machine	119
Elevator	118

Updated November 6, 2026. Read from US Department of Labor, Mine Safety and Health Administration (MSHA), Open Government Data Sets. US government work, public domain. Counts come from the MSHA files published on November 6, 2026. An open mine is one MSHA lists as Active, Intermittent, New Mine, Temporarily Idled or NonProducing; 13,673 were open that day. Citations, penalties, inspections and accident reports run from January 1, 2022. A citation is an inspector's allegation and an operator can contest it; the penalty is the amount MSHA first proposed, before any contest or settlement. An operator is the legal entity MSHA assesses, and a parent company is its controller. Mines run by sole proprietors or by individuals are counted in every total and are not named. This page uses MSHA data and is not endorsed or certified by MSHA. Free to reuse with credit to SpecStream under CC BY 4.0. Spot a wrong value? Write to [email protected] with the link to this page.