Thayerville Mine
Active
Underground
Stone
Operator: Maryland Minerals Inc
Controller: Beverly A Critchfield
Location: McHenry, Garrett County, MD
Employees: 15
194
Violations
50
S&S Violations
9
Accidents
$43K
Penalties
Recent Violations
View all 194 →| Date | Section | S&S | Negligence | Penalty |
|---|---|---|---|---|
| 10/23/2025 | 56.4402 | Non-S&S | LowNegligence | $151 |
| 03/03/2025 | 57.14100(c) | S&S | LowNegligence | $151 |
| 03/03/2025 | 56.9314 | Non-S&S | LowNegligence | $151 |
| 02/26/2025 | 57.12032 | Non-S&S | LowNegligence | $151 |
| 10/04/2024 | 56.12008 | Non-S&S | LowNegligence | $147 |
| 06/20/2024 | 56.4530 | Non-S&S | ModNegligence | $147 |
| 06/20/2024 | 56.12028 | Non-S&S | ModNegligence | $147 |
| 08/15/2023 | 57.15005 | S&S | ModNegligence | $3,528 |
| 08/15/2023 | 57.4260(a) | Non-S&S | LowNegligence | $143 |
| 08/15/2023 | 57.14100(b) | Non-S&S | LowNegligence | $143 |
| 08/15/2023 | 57.11001 | S&S | ModNegligence | $143 |
| 10/17/2022 | Non-S&S | $0 | ||
| 10/06/2022 | 47.44(b) | Non-S&S | ModNegligence | $133 |
| 02/24/2022 | 57.14116(a) | Non-S&S | ModNegligence | $133 |
| 03/09/2021 | 57.15001 | Non-S&S | ModNegligence | $125 |
| 10/23/2019 | 56.11001 | Non-S&S | ModNegligence | $121 |
| 09/11/2019 | 57.8520(b)(9) | Non-S&S | LowNegligence | $121 |
| 04/04/2019 | 57.4601 | Non-S&S | ModNegligence | $121 |
| 04/03/2019 | 57.14132(a) | Non-S&S | LowNegligence | $121 |
| 01/08/2019 | 47.44(b) | Non-S&S | ModNegligence | $121 |
Accidents & Injuries
View all 9 →| Date | Classification | Injury | Days Lost |
|---|---|---|---|
| 06/27/2016 | STEPPING OR KNEELING ON OBJECT | DAYS AWAY FROM WORK ONLY | 2d lost |
| 11/06/2013 | HANDLING OF MATERIALS | NO DYS AWY FRM WRK,NO RSTR ACT | None |
| 06/17/2013 | HANDTOOLS (NONPOWERED) | NO DYS AWY FRM WRK,NO RSTR ACT | None |
| 03/26/2010 | HANDTOOLS (NONPOWERED) | DAYS AWAY FROM WORK ONLY | 1d lost |
| 10/08/2007 | HANDTOOLS (NONPOWERED) | DAYS AWAY FROM WORK ONLY | 1d lost |
| 02/22/2007 | OTHER | DAYS AWAY FROM WORK ONLY | 1d lost |
| 12/08/2006 | HANDLING OF MATERIALS | DAYS AWAY FROM WORK ONLY | 2d lost |
| 04/28/2004 | POWERED HAULAGE | DAYS AWAY FROM WORK ONLY | 65d lost |
| 08/18/2000 | DISORDERS (REPEATED TRAUMA) | OCCUPATNAL ILLNESS NOT DEG 1-6 | 15d lost |
Inspections
View all 163 →| Begin | End | Hours | Inspectors |
|---|---|---|---|
| 03/04/2026 | 0.00 | 0 | |
| 10/16/2025 | 10/29/2025 | 48.50 | 1 |
| 09/23/2025 | 09/23/2025 | 4.00 | 1 |
| 07/03/2025 | 09/03/2025 | 31.00 | 2 |
| 05/13/2025 | 05/13/2025 | 10.00 | 1 |
| 05/05/2025 | 05/16/2025 | 24.50 | 1 |
| 02/26/2025 | 03/03/2025 | 21.50 | 1 |
| 10/03/2024 | 10/29/2024 | 25.00 | 1 |
| 09/16/2024 | 09/16/2024 | 4.50 | 1 |
| 07/31/2024 | 08/07/2024 | 26.00 | 1 |
Mine Details
MSHA Mine ID1800735
Mine TypeUnderground
StatusActive
CommodityStone
SIC DescriptionCrushed, Broken Limestone NEC
Employees15
Days/Week5.0
Hours/Shift10.0
Coordinates39.4988890, -79.3325000
Nearest TownMcHenry
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Frequently Asked Questions
How many MSHA violations does Thayerville Mine have?
Thayerville Mine has 194 MSHA violations on record, of which 50 are classified as Significant & Substantial (S&S). Total proposed penalties amount to $43K.
What type of mine is Thayerville Mine?
Thayerville Mine is a Underground mine producing Stone, located in McHenry, Garrett County, MD. It currently has 15 employees.
Has anyone been injured or killed at Thayerville Mine?
According to MSHA records, Thayerville Mine has 9 reported accident/injury records and 0 fatalities on file.
Who operates Thayerville Mine?
Thayerville Mine is operated by Maryland Minerals Inc and controlled by Beverly A Critchfield. MSHA Mine ID: 1800735.