Mines in Maryland: 75 open mines and MSHA citations
MSHA lists 75 open mines in Maryland, run by 46 operators and employing 1,270 people. Since January 1, 2022 its inspectors issued 1,650 citations and orders there with $640,958 in proposed penalties, and operators reported 148 injury or illness cases. The operators with the most open mines are York Building Products Co Inc; Cobra Mining, Inc.; Sustainable Land Use, LLC. Data from MSHA, November 6, 2026.
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- Open mines
- 75
- Operators
- 46
- Employees
- 1,270
- Active
- 59
- Temporarily Idled
- 9
- Intermittent
- 5
- New Mine
- 2
- Citations and orders since January 1, 2022
- 1,650
- Significant and substantial
- 263 (15.9%)
- Closure orders
- 20
- High negligence or reckless
- 48
- Proposed penalties
- $640,958
- Amount paid so far
- $554,171
- Inspections
- 1,019
- Inspector hours on site
- 16,274
- Citations per inspection
- 1.62 (all mines 2.30)
- Accident reports
- 161
- Injury and illness cases
- 148
- Fatalities
- 0
- Latest MSHA record
- November 2, 2026
Operators with the most open mines in Maryland
Ranked by open mines, then by citations. Sole proprietors and individuals are not listed.
Operators with the most citations in Maryland
Citations and orders issued since January 1, 2022 at their open mines here.
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 |
|---|---|---|---|---|---|
| Casselman Mine | Rosebud Mining Company | Garrett County, MD | Coal (bituminous) | 39 | 521 |
| Amrize Hagerstown Facility | Holcim (US) Incorporated | Washington County, MD | Cement | 106 | 213 |
| Union Bridge MD | Lehigh Cement Company LLC | Carroll County, MD | Cement | 175 | 142 |
| Amrize Rockville Quarry | Amrize Mid-Atlantic Inc. | Montgomery County, MD | Crushed, broken granite | 24 | 58 |
| Belvedere Plant | York Building Products Co Inc | Cecil County, MD | Construction sand and gravel | 28 | 56 |
| Bridgetown Sand & Gravel | Pax-Shore Aggregates, LLC | Caroline County, MD | Construction sand and gravel | 8 | 46 |
| Merrick Sand & Gravel | Merrick Sand & Gravel | Queen Annes County, MD | Sand, industrial | 7 | 36 |
| Cabin Run | 97 Mining Holding Company, LLC | Allegany County, MD | Coal (bituminous) | 20 | 29 |
| Savage Stone | Savage Stone, LLC | Howard County, MD | Crushed, broken granite | 54 | 26 |
| Mettiki General | Mettiki Coal LLC | Garrett County, MD | Coal (bituminous) | 42 | 24 |
| Patapsco Natural Stone Quarry LLC | Patapsco Natural Stone Quarry LLC | Howard County, MD | Dimension granite | 5 | 24 |
| Faulkner Site | Pax-Shore Aggregates, LLC | Caroline County, MD | Construction sand and gravel | 7 | 23 |
| Texas Quarry | Bluegrass Materials Company, LLC | Baltimore County, MD | Crushed, broken limestone | 38 | 21 |
| Principio Quarry | York Building Products Co Inc | Cecil County, MD | Crushed, broken granite | 25 | 19 |
| Henderson-MD Sand & Gravel | Sustainable Land Use, LLC | Caroline County, MD | Construction sand and gravel | 2 | 19 |
| Job #3 | Tri-Star Mining Inc | Allegany County, MD | Coal (bituminous) | 35 | 18 |
| Cecil Plant | York Building Products Co Inc | Cecil County, MD | Construction sand and gravel | 11 | 18 |
| No 1 Strip | Cobra Mining, Inc. | Allegany County, MD | Coal (bituminous) | 8 | 18 |
| Midland Mine | Simkol Corp. | Allegany County, MD | Coal (bituminous) | 6 | 17 |
| Havre De Grace Quarry | Vulcan Construction Materials, LLC | Harford County, MD | Crushed, broken traprock | 74 | 16 |
| Perryville Plant | York Building Products Co Inc | Cecil County, MD | Construction sand and gravel | 11 | 16 |
| Elk Mills Quarry | Allan Myers Materials, MD | Cecil County, MD | Crushed, broken granite | 32 | 15 |
| Thayerville Mine | Maryland Minerals Inc | Garrett County, MD | Crushed, broken limestone | 15 | 15 |
| Waldorf-MD Sand & Gravel | Sustainable Land Use, LLC | Charles County, MD | Construction sand and gravel | 14 | 15 |
| Cobra No 1 | Cobra Mining, Inc. | Allegany County, MD | Coal (bituminous) | 14 | 15 |
| M & S Stone Quarries Inc | M & S Stone Quarries Inc | Garrett County, MD | Dimension sandstone | 3 | 13 |
| S W Barrick & Sons | S W Barrick & Sons | Frederick County, MD | Crushed, broken limestone | 56 | 12 |
| Laurel Hill Quarry | Laurel Sand & Gravel, Inc. | Frederick County, MD | Crushed, broken stone | 29 | 12 |
| Carderock Quarries | Tri-State Stone & Building Supply Inc. | Montgomery County, MD | Crushed, broken stone | 22 | 12 |
| Bedrock Enterprises Inc | Bedrock Enterprises, Inc | Garrett County, MD | Dimension sandstone | 4 | 12 |
| Jackson | C & S Coal LLC | Allegany County, MD | Coal (bituminous) | 2 | 12 |
| Taylor Lower Bakerstown | Cobra Mining, Inc. | Garrett County, MD | Coal (bituminous) | 0 | 12 |
| Piney Reclamation | G&S Piney, LLC, DBA Piney Reclamation | Charles County, MD | Construction sand and gravel | 4 | 10 |
| No. 3 Airport Job | Cobra Mining, Inc. | Garrett County, MD | Coal (bituminous) | 5 | 9 |
| Carlos Surface | 97 Mining Holding Company, LLC | Allegany County, MD | Coal (bituminous) | 0 | 9 |
| Frederick Quarry | Bluegrass Materials Company, LLC | Frederick County, MD | Crushed, broken limestone | 27 | 7 |
| Chesapeake Minerals | York Building Products Co Inc | Cecil County, MD | Quartz, ground | 10 | 7 |
| Mardela Springs-MD SG | Sustainable Land Use, LLC | Wicomico County, MD | Construction sand and gravel | 4 | 7 |
| Frederick Quarry | Vulcan Construction Materials, LLC | Frederick County, MD | Crushed, broken limestone | 32 | 6 |
| Gudelsky Materials | Gudelsky Materials | Prince Georges County, MD | Construction sand and gravel | 24 | 6 |
| Ingleside Pit | York Building Products Co Inc | Queen Annes County, MD | Construction sand and gravel | 5 | 6 |
| Furnace Bay Plant | Stancills Inc | Cecil County, MD | Construction sand and gravel | 4 | 6 |
| North East Quarry | Bluegrass Materials Company, LLC | Cecil County, MD | Crushed, broken granite | 31 | 5 |
| Bedrock Quarry | Allegany Aggregates Inc | Allegany County, MD | Crushed, broken limestone | 16 | 5 |
| Kent Sand & Gravel Quarry | Bluegrass Materials Company, LLC | Kent County, MD | Construction sand and gravel | 4 | 5 |
| Maryland Minerals | Maryland Minerals Inc | Garrett County, MD | Sand, common | 3 | 5 |
| Amrize Accokeek Sand & Gravel | Amrize Mid-Atlantic Inc. | Prince Georges County, MD | Construction sand and gravel | 23 | 4 |
| Beaver Creek Quarry | Laurel Sand & Gravel, Inc. | Washington County, MD | Crushed, broken limestone | 18 | 4 |
| Zimmerman Mine | Sloan Materials, LLC | St Marys County, MD | Construction sand and gravel | 6 | 4 |
| Frederick Grinding Plant | Tamko Building Products LLC | Frederick County, MD | Crushed, broken limestone | 6 | 4 |
| No. 4 Woodyard Job | Cobra Mining, Inc. | Garrett County, MD | Coal (bituminous) | 4 | 4 |
| #1 Strip | Pine Mountain Coal Company | Garrett County, MD | Coal (bituminous) | 3 | 4 |
| Sand Bank Quarry | Ritchie Trucking & Excavating, Inc. | Allegany County, MD | Crushed, broken stone | 2 | 4 |
| Midland | Beechwood Coal, LLC | Allegany County, MD | Coal (bituminous) | 0 | 4 |
| Medford Quarry | Bluegrass Materials Company, LLC | Carroll County, MD | Crushed, broken limestone | 14 | 3 |
| Mechanicsville-MD Sand & Gravel | Sustainable Land Use, LLC | St Marys County, MD | Construction sand and gravel | 13 | 3 |
| Jackson Mountain | Arj Construction Company Inc | Allegany County, MD | Coal (bituminous) | 2 | 3 |
| Churchville Quarry | Bluegrass Materials Company, LLC | Harford County, MD | Dimension stone | 18 | 2 |
| Dependable Contracting Co Inc | Dependable Sand Stone & Recycling Co Inc | Talbot County, MD | Construction sand and gravel | 3 | 2 |
| Pinesburg Quarry | Martin Marietta Materials, Inc. | Washington County, MD | Crushed, broken limestone | 17 | 1 |
| Boonsboro Quarry | Martin Marietta Materials, Inc. | Washington County, MD | Crushed, broken limestone | 10 | 1 |
| Amrize Kirby Road Sand & Gravel | Amrize Mid-Atlantic Inc. | Prince Georges County, MD | Construction sand and gravel | 9 | 1 |
| Harwood-MD Sand & Gravel | Sustainable Land Use, LLC | Anne Arundel County, MD | Construction sand and gravel | 6 | 1 |
| Rosser Pit | Marshyhope Operations LLC | Dorchester County, MD | Construction sand and gravel | 5 | 1 |
| Loveville-MD Sand & Gravel | Sustainable Land Use, LLC | St Marys County, MD | Construction sand and gravel | 4 | 1 |
| Kpi-Jci 4250 | Scott's Hauling and Excavating | Washington County, MD | Crushed, broken limestone | 3 | 1 |
| Smith 301 Pitt | Renard Lakes Holdings, LLC | Prince Georges County, MD | Crushed, broken granite | 6 | 0 |
| Koontz | Beechwood Coal, LLC | Allegany County, MD | Coal (bituminous) | 6 | 0 |
| Disney Sand & Gravel LLC | Disney Sand & Gravel LLC | Wicomico County, MD | Sand, common | 3 | 0 |
| McConchie / Smokey Rock | Stormwater Management Solutions, LLC. | Charles County, MD | Construction sand and gravel | 3 | 0 |
| Butler Artcraft Stone Corporation | Butler Artcraft Stone Corporation | Baltimore County, MD | Dimension stone | 1 | 0 |
| Tipple No.1 | Franklin Coal Yard, LLP | Allegany County, MD | Coal (bituminous) | 0 | 0 |
| Walker Mine | Cobra Mining, Inc. | Allegany County, MD | Coal (bituminous) | 0 | 0 |
| Target#3 | Glade Run Mining LLC | Garrett County, MD | Not stated | 0 | 0 |
| Russell Farm | Jim Clark LLC | Allegany County, MD | Not stated | 0 | 0 |
Counties
| County | Open mines |
|---|---|
| Allegany County | 15 |
| Garrett County | 11 |
| Cecil County | 8 |
| Frederick County | 5 |
| Washington County | 5 |
| Prince Georges County | 4 |
| Charles County | 3 |
| St Marys County | 3 |
| Caroline County | 3 |
| Baltimore County | 2 |
| Harford County | 2 |
| Carroll County | 2 |
| Montgomery County | 2 |
| Howard County | 2 |
| Wicomico County | 2 |
| Queen Annes County | 2 |
| Dorchester County | 1 |
| Talbot County | 1 |
| Kent County | 1 |
| Anne Arundel County | 1 |
Mines by kind
| Kind | Open mines |
|---|---|
| Stone | 29 |
| Sand and gravel | 24 |
| Coal | 18 |
| Nonmetal | 2 |
Main commodities
| Main commodity | Open mines | Share |
|---|---|---|
| Construction sand and gravel | 22 | 29.3% |
| Coal (bituminous) | 18 | 24% |
| Crushed, broken limestone | 12 | 16% |
| Crushed, broken granite | 6 | 8% |
| Crushed, broken stone | 3 | 4% |
| Dimension stone | 2 | 2.7% |
| Cement | 2 | 2.7% |
| Sand, common | 2 | 2.7% |
| Dimension sandstone | 2 | 2.7% |
| Dimension granite | 1 | 1.3% |
| Crushed, broken traprock | 1 | 1.3% |
| Sand, industrial | 1 | 1.3% |
| Quartz, ground | 1 | 1.3% |
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 | 307 | 49 | $109,998 | 26 |
| 2023 | 461 | 70 | $159,558 | 31 |
| 2024 | 366 | 53 | $152,427 | 33 |
| 2025 | 296 | 61 | $174,699 | 30 |
| 2026 | 220 | 30 | $44,276 | 28 |
Standards cited most at mines in Maryland
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 | 113 |
| 30 CFR 56.14112 | Surface metal and nonmetal mines | 76 |
| 30 CFR 75.400 | Underground coal mines, safety | 63 |
| 30 CFR 56.14100 | Surface metal and nonmetal mines | 62 |
| 30 CFR 56.14107 | Surface metal and nonmetal mines | 59 |
| 30 CFR 75.503 | Underground coal mines, safety | 48 |
| 30 CFR 56.12032 | Surface metal and nonmetal mines | 39 |
| 30 CFR 56.12004 | Surface metal and nonmetal mines | 35 |
| 30 CFR 75.370 | Underground coal mines, safety | 34 |
| 30 CFR 50.30 | Reporting of accidents, injuries and illnesses | 31 |
| 30 CFR 56.14132 | Surface metal and nonmetal mines | 30 |
| 30 CFR 77.404 | Surface coal mines, safety | 29 |
| 30 CFR 56.11001 | Surface metal and nonmetal mines | 24 |
| 30 CFR 56.4201 | Surface metal and nonmetal mines | 24 |
| 30 CFR 56.16005 | Surface metal and nonmetal mines | 22 |
Injury and illness cases at mines in Maryland
Accident reports by degree of injury, as the operator reported them to MSHA.
| Degree | Cases |
|---|---|
| Permanent disability | 2 |
| Days away from work or restricted activity | 103 |
| No lost time, or an occupational illness | 43 |
What the accident reports at mines in Maryland describe
Accident classification, as MSHA codes the circumstances that contributed most directly.
| Classification | Reports |
|---|---|
| Handling of materials | 54 |
| Handtools (nonpowered) | 31 |
| Slip or fall of person | 28 |
| Powered haulage | 13 |
| Machinery | 8 |
| Other | 6 |
| Fire | 5 |
| Fall of roof or back | 4 |
| Striking or bumping | 3 |
| Disorders (repeated trauma) | 3 |
Equipment named in accident reports at mines in Maryland
| Equipment | Reports |
|---|---|
| Hand tools (not powered) | 33 |
| Hand tools (powered) | 4 |
| Front-end loader | 4 |
| Trucks | 3 |
| Crane | 3 |
| Ore haulage trucks - off highway trucks | 3 |
| Load-haul-dump | 3 |
| Conveyor | 3 |
| Shovel | 2 |
| Forklift | 2 |
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.