Data / Mines / Pennsylvania / Montgomery County
Mines in Montgomery County, Pennsylvania: 8 open mines
Updated November 6, 2026. Source: US Department of Labor, Mine Safety and Health Administration (MSHA), Open Government Data Sets.
MSHA lists 8 open mines in Montgomery County, Pennsylvania, run by 6 operators and employing 95 people. Since January 1, 2022 its inspectors issued 170 citations and orders there with $69,756 in proposed penalties, and operators reported 17 injury or illness cases. The operators with the most open mines are Glasgow Inc; Heidelberg Materials Northeast LLC; Harleysville Materials LLC. Data from MSHA, November 6, 2026.
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- Open mines
- 8
- Operators
- 6
- Employees
- 95
- Active
- 7
- Intermittent
- 1
- Citations and orders since January 1, 2022
- 170
- Significant and substantial
- 42 (24.7%)
- Closure orders
- 1
- High negligence or reckless
- 5
- Proposed penalties
- $69,756
- Amount paid so far
- $40,753
- Inspections
- 112
- Inspector hours on site
- 1,198
- Citations per inspection
- 1.52 (all mines 2.30)
- Accident reports
- 17
- Injury and illness cases
- 17
- Fatalities
- 0
- Latest MSHA record
- October 29, 2026
Operators with the most open mines in Montgomery County, Pennsylvania
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 |
|---|---|---|---|---|---|
| Glasgow Inc | 2 | 33 | 56 | $11,547 | 10 |
| Heidelberg Materials Northeast LLC | 2 | 47 | 26 | $2,864 | 6 |
| Harleysville Materials LLC | 1 | 6 | 55 | $50,239 | 0 |
| Gill Quarries Inc | 1 | 3 | 16 | $2,751 | 0 |
| Stoudt'S Ferry Preparation Company Inc | 1 | 3 | 10 | $1,466 | 0 |
| Wissahickon Stone Quarry, LLC | 1 | 3 | 7 | $889 | 1 |
Operators with the most citations in Montgomery County, Pennsylvania
Citations and orders issued since January 1, 2022 at their open mines here.
| Operator | Open mines | Employees | Citations since 2022 | Proposed penalties | Injury cases |
|---|---|---|---|---|---|
| Glasgow Inc | 2 | 33 | 56 | $11,547 | 10 |
| Harleysville Materials LLC | 1 | 6 | 55 | $50,239 | 0 |
| Heidelberg Materials Northeast LLC | 2 | 47 | 26 | $2,864 | 6 |
| Gill Quarries Inc | 1 | 3 | 16 | $2,751 | 0 |
| Stoudt'S Ferry Preparation Company Inc | 1 | 3 | 10 | $1,466 | 0 |
| Wissahickon Stone Quarry, LLC | 1 | 3 | 7 | $889 | 1 |
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 |
|---|---|---|---|---|---|
| Harleysville Materials | Harleysville Materials LLC | Montgomery County, PA | Crushed, broken stone | 6 | 55 |
| Mccoy Quarry | Glasgow Inc | Montgomery County, PA | Crushed, broken limestone | 18 | 36 |
| Spring House Quarry | Glasgow Inc | Montgomery County, PA | Crushed, broken limestone | 15 | 20 |
| Plymouth Meeting Quarry | Heidelberg Materials Northeast LLC | Montgomery County, PA | Crushed, broken limestone | 30 | 19 |
| East Norriton Quarry | Gill Quarries Inc | Montgomery County, PA | Crushed, broken stone | 3 | 16 |
| Oaks Plant | Stoudt'S Ferry Preparation Company Inc | Montgomery County, PA | Coal (anthracite) | 3 | 10 |
| Perkiomenville Quarry | Heidelberg Materials Northeast LLC | Montgomery County, PA | Crushed, broken traprock | 17 | 7 |
| Wissahickon Stone Quarry | Wissahickon Stone Quarry, LLC | Montgomery County, PA | Mica | 3 | 7 |
Main commodities
| Main commodity | Open mines | Share |
|---|---|---|
| Crushed, broken limestone | 3 | 37.5% |
| Crushed, broken stone | 2 | 25% |
| Crushed, broken traprock | 1 | 12.5% |
| Mica | 1 | 12.5% |
| Coal (anthracite) | 1 | 12.5% |
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 | 26 | 6 | $10,908 | 3 |
| 2023 | 36 | 12 | $6,221 | 2 |
| 2024 | 23 | 4 | $18,418 | 4 |
| 2025 | 42 | 11 | $29,573 | 2 |
| 2026 | 43 | 9 | $4,636 | 6 |
Standards cited most at mines in Montgomery County, Pennsylvania
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 56.14100 | Surface metal and nonmetal mines | 17 |
| 30 CFR 56.14112 | Surface metal and nonmetal mines | 14 |
| 30 CFR 56.12004 | Surface metal and nonmetal mines | 8 |
| 30 CFR 56.20003 | Surface metal and nonmetal mines | 8 |
| 30 CFR 56.3200 | Surface metal and nonmetal mines | 8 |
| 30 CFR 56.14107 | Surface metal and nonmetal mines | 7 |
| 30 CFR 56.11001 | Surface metal and nonmetal mines | 6 |
| 30 CFR 56.12028 | Surface metal and nonmetal mines | 6 |
| 30 CFR 56.14109 | Surface metal and nonmetal mines | 5 |
| 30 CFR 56.4201 | Surface metal and nonmetal mines | 5 |
| 30 CFR 56.12032 | Surface metal and nonmetal mines | 4 |
| 30 CFR 56.14101 | Surface metal and nonmetal mines | 4 |
| 30 CFR 56.14103 | Surface metal and nonmetal mines | 4 |
| 30 CFR 50.30 | Reporting of accidents, injuries and illnesses | 4 |
| 30 CFR 56.4101 | Surface metal and nonmetal mines | 3 |
Injury and illness cases at mines in Montgomery County, Pennsylvania
Accident reports by degree of injury, as the operator reported them to MSHA.
| Degree | Cases |
|---|---|
| Days away from work or restricted activity | 12 |
| No lost time, or an occupational illness | 5 |
What the accident reports at mines in Montgomery County, Pennsylvania describe
Accident classification, as MSHA codes the circumstances that contributed most directly.
| Classification | Reports |
|---|---|
| Handling of materials | 8 |
| Machinery | 2 |
| Powered haulage | 2 |
| Slip or fall of person | 2 |
| Other | 1 |
| Handtools (nonpowered) | 1 |
| Striking or bumping | 1 |
Equipment named in accident reports at mines in Montgomery County, Pennsylvania
| Equipment | Reports |
|---|---|
| Ore haulage trucks - off highway trucks | 3 |
| Welding machine | 1 |
| Man lift | 1 |
| Trucks | 1 |
| Hand tools (not powered) | 1 |
| Dimension stone machinery | 1 |
| Crane | 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.