Data / Mines / Maryland / Carderock Quarries
Carderock Quarries: 12 MSHA citations
Updated November 6, 2026. Source: US Department of Labor, Mine Safety and Health Administration (MSHA), Open Government Data Sets.
Carderock Quarries is an active crushed, broken stone surface mine in Montgomery County, Maryland, operated by Tri-State Stone & Building Supply Inc. with 22 employees on MSHA's record (mine ID 1800404). Since January 1, 2022 MSHA inspectors issued 12 citations and orders there with $1,732 in proposed penalties, and 1 accident report was filed there, with 1 injury or illness case.
The request: Watch Carderock Quarries (MSHA mine ID 1800404) in Montgomery County, Maryland: each new citation and each accident report. $10 of work on sign-up, no card.
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- MSHA mine ID
- 1800404
- Status
- Active since October 1, 2003
- Main commodity
- Crushed, broken stone
- Mine type
- Surface
- County
- Montgomery County, Maryland
- Nearest town
- Bethesda
- Operator
- Tri-State Stone & Building Supply Inc.
- Employees
- 22
- MSHA field office
- Staunton VA Field Office
- Citations and orders since January 1, 2022
- 12
- Significant and substantial
- 1 (8.3%)
- Closure orders
- 0
- High negligence or reckless
- 1
- Proposed penalties
- $1,732
- Amount paid so far
- $1,430
- Inspections
- 11
- Inspector hours on site
- 108
- Citations per inspection
- 1.09 (all mines 2.30)
- Accident reports
- 1
- Injury and illness cases
- 1
- Fatalities
- 0
- Latest MSHA record
- October 5, 2026
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 | 2 | 0 | $266 | 0 |
| 2023 | 5 | 0 | $715 | 0 |
| 2024 | 1 | 1 | $147 | 0 |
| 2025 | 2 | 0 | $302 | 0 |
| 2026 | 2 | 0 | $302 | 1 |
Standards cited most at Carderock Quarries
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 56.15004 | Surface metal and nonmetal mines | 2 |
| 30 CFR 56.14100 | Surface metal and nonmetal mines | 2 |
| 30 CFR 56.12032 | Surface metal and nonmetal mines | 1 |
| 30 CFR 46.9 | Training at sand, gravel and surface stone mines | 1 |
| 30 CFR 56.4101 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.3131 | Surface metal and nonmetal mines | 1 |
| 30 CFR 50.30 | Reporting of accidents, injuries and illnesses | 1 |
| 30 CFR 56.12004 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.18010 | Surface metal and nonmetal mines | 1 |
| 30 CFR 62.120 | Occupational noise exposure | 1 |
Injury and illness cases at Carderock Quarries
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 Carderock Quarries describe
Accident classification, as MSHA codes the circumstances that contributed most directly.
| Classification | Reports |
|---|---|
| Handling of materials | 1 |
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.