Data / Mines / Maryland / Thayerville Mine
Thayerville Mine: 15 MSHA citations
Updated November 6, 2026. Source: US Department of Labor, Mine Safety and Health Administration (MSHA), Open Government Data Sets.
Thayerville Mine is an active crushed, broken limestone underground mine in Garrett County, Maryland, operated by Maryland Minerals Inc with 15 employees on MSHA's record (mine ID 1800735). Since January 1, 2022 MSHA inspectors issued 15 citations and orders there with $1,891 in proposed penalties, and 1 accident report was filed there, with 1 injury or illness case.
The request: Watch Thayerville Mine (MSHA mine ID 1800735) in Garrett County, Maryland: each new citation and each accident report. $10 of work on sign-up, no card.
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- MSHA mine ID
- 1800735
- Status
- Active since July 31, 1995
- Main commodity
- Crushed, broken limestone
- Mine type
- Underground
- County
- Garrett County, Maryland
- Nearest town
- McHenry
- Operator
- Maryland Minerals Inc
- Employees
- 15
- MSHA field office
- Morgantown WV Field Office
- Citations and orders since January 1, 2022
- 15
- Significant and substantial
- 2 (13.3%)
- Closure orders
- 1
- High negligence or reckless
- 0
- Proposed penalties
- $1,891
- Amount paid so far
- $1,891
- Inspections
- 34
- Inspector hours on site
- 541
- Citations per inspection
- 0.44 (all mines 2.30)
- Accident reports
- 1
- Injury and illness cases
- 1
- Fatalities
- 0
- Latest MSHA record
- September 18, 2026
- Citations issued to contractors here
- 1 ($3,528 proposed)
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 | 3 | 0 | $266 | 0 |
| 2023 | 3 | 1 | $429 | 0 |
| 2024 | 3 | 0 | $441 | 0 |
| 2025 | 4 | 1 | $604 | 0 |
| 2026 | 2 | 0 | $151 | 1 |
Standards cited most at Thayerville Mine
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 57.14100 | Underground metal and nonmetal mines | 3 |
| 30 CFR 57.14116 | Underground metal and nonmetal mines | 1 |
| 30 CFR 57.12032 | Underground metal and nonmetal mines | 1 |
| 30 CFR 56.9314 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.4530 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.12028 | Surface metal and nonmetal mines | 1 |
| 30 CFR 57.4260 | Underground metal and nonmetal mines | 1 |
| 30 CFR 57.11001 | Underground metal and nonmetal mines | 1 |
| 30 CFR 57.14132 | Underground metal and nonmetal mines | 1 |
| 30 CFR 47.44 | Hazard communication | 1 |
| 30 CFR 56.12008 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.4402 | Surface metal and nonmetal mines | 1 |
Injury and illness cases at Thayerville Mine
Accident reports by degree of injury, as the operator reported them to MSHA.
| Degree | Cases |
|---|---|
| Days away from work or restricted activity | 1 |
What the accident reports at Thayerville Mine describe
Accident classification, as MSHA codes the circumstances that contributed most directly.
| Classification | Reports |
|---|---|
| Handling of materials | 1 |
Equipment named in accident reports at Thayerville Mine
| Equipment | Reports |
|---|---|
| Carriage-mounted drills | 1 |
Other open mines in Garrett County, Maryland
| Mine | Operator | County | Main commodity | Employees | Citations since 2022 |
|---|---|---|---|---|---|
| Casselman Mine | Rosebud Mining Company | Garrett County, MD | Coal (bituminous) | 39 | 521 |
| Mettiki General | Mettiki Coal LLC | Garrett County, MD | Coal (bituminous) | 42 | 24 |
| M & S Stone Quarries Inc | M & S Stone Quarries Inc | Garrett County, MD | Dimension sandstone | 3 | 13 |
| Bedrock Enterprises Inc | Bedrock Enterprises, Inc | Garrett County, MD | Dimension sandstone | 4 | 12 |
| Taylor Lower Bakerstown | Cobra Mining, Inc. | Garrett County, MD | Coal (bituminous) | 0 | 12 |
| No. 3 Airport Job | Cobra Mining, Inc. | Garrett County, MD | Coal (bituminous) | 5 | 9 |
| Maryland Minerals | Maryland Minerals Inc | Garrett County, MD | Sand, common | 3 | 5 |
| 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 |
| Target#3 | Glade Run Mining LLC | Garrett County, MD | Not stated | 0 | 0 |
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.