Data / Mines / Pennsylvania / Centre County
Mines in Centre County, Pennsylvania: 12 open mines
MSHA lists 12 open mines in Centre County, Pennsylvania, run by 6 operators and employing 265 people. Since January 1, 2022 its inspectors issued 471 citations and orders there with $97,079 in proposed penalties, and operators reported 30 injury or illness cases. The operators with the most open mines are Heidelberg Materials Northeast LLC; Siri Contracting, LLC; Glenn O Hawbaker Inc. Data from MSHA, November 6, 2026.
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- Open mines
- 12
- Operators
- 6
- Employees
- 265
- Active
- 7
- Intermittent
- 3
- Temporarily Idled
- 2
- Mines run by individuals, counted and not listed
- 1
- Citations and orders since January 1, 2022
- 471
- Significant and substantial
- 45 (9.6%)
- Closure orders
- 2
- High negligence or reckless
- 16
- Proposed penalties
- $97,079
- Amount paid so far
- $94,372
- Inspections
- 124
- Inspector hours on site
- 4,942
- Citations per inspection
- 3.80 (all mines 2.30)
- Accident reports
- 34
- Injury and illness cases
- 30
- Fatalities
- 0
- Latest MSHA record
- November 3, 2026
Operators with the most open mines in Centre 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 |
|---|---|---|---|---|---|
| Heidelberg Materials Northeast LLC | 3 | 27 | 50 | $8,371 | 4 |
| Siri Contracting, LLC | 3 | 16 | 16 | $2,732 | 0 |
| Glenn O Hawbaker Inc | 3 | 61 | 10 | $1,548 | 3 |
| Graymont (Pa) Inc | 1 | 147 | 385 | $82,974 | 22 |
| Con-Stone Inc | 1 | 12 | 9 | $1,303 | 1 |
Operators with the most citations in Centre 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 |
|---|---|---|---|---|---|
| Graymont (Pa) Inc | 1 | 147 | 385 | $82,974 | 22 |
| Heidelberg Materials Northeast LLC | 3 | 27 | 50 | $8,371 | 4 |
| Siri Contracting, LLC | 3 | 16 | 16 | $2,732 | 0 |
| Glenn O Hawbaker Inc | 3 | 61 | 10 | $1,548 | 3 |
| Con-Stone Inc | 1 | 12 | 9 | $1,303 | 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 |
|---|---|---|---|---|---|
| Graymont (PA) Inc. Pleasant Gap | Graymont (Pa) Inc | Centre County, PA | Lime | 147 | 385 |
| Curtin Gap Quarry | Heidelberg Materials Northeast LLC | Centre County, PA | Crushed, broken limestone | 14 | 33 |
| Oak Hall Quarry | Heidelberg Materials Northeast LLC | Centre County, PA | Crushed, broken limestone | 13 | 17 |
| Con-Stone Inc | Con-Stone Inc | Centre County, PA | Crushed, broken limestone | 12 | 9 |
| Metso LT120 S/N 182266 | Siri Contracting, LLC | Centre County, PA | Crushed, broken limestone | 7 | 9 |
| Metso LT120 Serial #182086 | Siri Contracting, LLC | Centre County, PA | Crushed, broken traprock | 7 | 6 |
| Pleasant Gap Aggregate Plant #2 | Glenn O Hawbaker Inc | Centre County, PA | Crushed, broken limestone | 51 | 5 |
| Sandy Ridge Aggregate Plant #9 | Glenn O Hawbaker Inc | Centre County, PA | Crushed, broken sandstone | 9 | 5 |
| Mesto LT1213 (2) | Siri Contracting, LLC | Centre County, PA | Crushed, broken limestone | 2 | 1 |
| Kleemann K078 Crusher SN K0780198 | Glenn O Hawbaker Inc | Centre County, PA | Crushed, broken limestone | 1 | 0 |
| Jacksonville Quarry | Heidelberg Materials Northeast LLC | Centre County, PA | Crushed, broken limestone | 0 | 0 |
Main commodities
| Main commodity | Open mines | Share |
|---|---|---|
| Crushed, broken limestone | 8 | 66.7% |
| Crushed, broken sandstone | 2 | 16.7% |
| Lime | 1 | 8.3% |
| Crushed, broken traprock | 1 | 8.3% |
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 | 128 | 8 | $29,337 | 7 |
| 2023 | 92 | 6 | $22,844 | 7 |
| 2024 | 70 | 4 | $13,543 | 5 |
| 2025 | 65 | 11 | $16,329 | 8 |
| 2026 | 116 | 16 | $15,026 | 3 |
Standards cited most at mines in Centre 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 57.20003 | Underground metal and nonmetal mines | 43 |
| 30 CFR 57.14100 | Underground metal and nonmetal mines | 25 |
| 30 CFR 57.12004 | Underground metal and nonmetal mines | 24 |
| 30 CFR 57.12032 | Underground metal and nonmetal mines | 21 |
| 30 CFR 57.14112 | Underground metal and nonmetal mines | 20 |
| 30 CFR 57.12020 | Underground metal and nonmetal mines | 20 |
| 30 CFR 57.11001 | Underground metal and nonmetal mines | 19 |
| 30 CFR 57.14107 | Underground metal and nonmetal mines | 17 |
| 30 CFR 57.4201 | Underground metal and nonmetal mines | 16 |
| 30 CFR 56.20003 | Surface metal and nonmetal mines | 15 |
| 30 CFR 57.3200 | Underground metal and nonmetal mines | 12 |
| 30 CFR 57.12008 | Underground metal and nonmetal mines | 11 |
| 30 CFR 57.12030 | Underground metal and nonmetal mines | 10 |
| 30 CFR 57.14207 | Underground metal and nonmetal mines | 8 |
| 30 CFR 57.9300 | Underground metal and nonmetal mines | 8 |
Injury and illness cases at mines in Centre County, Pennsylvania
Accident reports by degree of injury, as the operator reported them to MSHA.
| Degree | Cases |
|---|---|
| Days away from work or restricted activity | 21 |
| No lost time, or an occupational illness | 9 |
What the accident reports at mines in Centre County, Pennsylvania describe
Accident classification, as MSHA codes the circumstances that contributed most directly.
| Classification | Reports |
|---|---|
| Handtools (nonpowered) | 8 |
| Slip or fall of person | 7 |
| Handling of materials | 6 |
| Other | 5 |
| Machinery | 2 |
| Fall of roof or back | 2 |
| Disorders (physical agents) | 1 |
| Powered haulage | 1 |
| Fire | 1 |
| Electrical | 1 |
Equipment named in accident reports at mines in Centre County, Pennsylvania
| Equipment | Reports |
|---|---|
| Hand tools (not powered) | 7 |
| Machine | 2 |
| Front-end loader | 2 |
| Ore haulage trucks - off highway trucks | 1 |
| Trucks | 1 |
| Hand tools (powered) | 1 |
| Mancar | 1 |
| Tractor | 1 |
| Conveyor | 1 |
| Crusher | 1 |
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.