Data / Mines / Pennsylvania / Slippery Rock
Slippery Rock: 10 MSHA citations
Updated November 6, 2026. Source: US Department of Labor, Mine Safety and Health Administration (MSHA), Open Government Data Sets.
Slippery Rock is an active crushed, broken limestone surface mine in Butler County, Pennsylvania, operated by Allegheny Mineral Corp with 22 employees on MSHA's record (mine ID 3606146). Since January 1, 2022 MSHA inspectors issued 10 citations and orders there with $1,400 in proposed penalties, and 3 accident reports were filed there, with 3 injury or illness cases.
The request: Watch Slippery Rock (MSHA mine ID 3606146) in Butler County, Pennsylvania: each new citation and each accident report. $10 of work on sign-up, no card.
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- MSHA mine ID
- 3606146
- Status
- Active since August 13, 1986
- Main commodity
- Crushed, broken limestone
- Mine type
- Surface
- County
- Butler County, Pennsylvania
- Nearest town
- Slippery Rock
- Operator
- Allegheny Mineral Corp
- Parent company
- Snyder Associated Companies Inc
- Employees
- 22
- MSHA field office
- Warrendale PA Field Office
- Citations and orders since January 1, 2022
- 10
- Significant and substantial
- 1 (10.0%)
- Closure orders
- 0
- High negligence or reckless
- 0
- Proposed penalties
- $1,400
- Amount paid so far
- $1,400
- Inspections
- 11
- Inspector hours on site
- 136
- Citations per inspection
- 0.91 (all mines 2.30)
- Accident reports
- 3
- Injury and illness cases
- 3
- Fatalities
- 0
- Latest MSHA record
- May 28, 2026
- Citations issued to contractors here
- 2 ($280 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 | 5 | 1 | $665 | 2 |
| 2023 | 2 | 0 | $286 | 0 |
| 2024 | 1 | 0 | $147 | 0 |
| 2025 | 2 | 0 | $302 | 1 |
Standards cited most at Slippery Rock
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 56.20003 | Surface metal and nonmetal mines | 3 |
| 30 CFR 47.44 | Hazard communication | 2 |
| 30 CFR 56.14107 | Surface metal and nonmetal mines | 2 |
| 30 CFR 56.9100 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.11003 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.9300 | Surface metal and nonmetal mines | 1 |
Injury and illness cases at Slippery Rock
Accident reports by degree of injury, as the operator reported them to MSHA.
| Degree | Cases |
|---|---|
| Permanent disability | 1 |
| No lost time, or an occupational illness | 2 |
What the accident reports at Slippery Rock describe
Accident classification, as MSHA codes the circumstances that contributed most directly.
| Classification | Reports |
|---|---|
| Disorders (repeated trauma) | 2 |
| Handling of materials | 1 |
Other open mines in Butler County, Pennsylvania
| Mine | Operator | County | Main commodity | Employees | Citations since 2022 |
|---|---|---|---|---|---|
| Armstrong Cement & Supply Corp | Armstrong Cement & Supply Corp | Butler County, PA | Cement | 55 | 75 |
| Harrisville | Allegheny Mineral Corp | Butler County, PA | Crushed, broken limestone | 26 | 25 |
| Murrinsville Plant | Allegheny Mineral Corp | Butler County, PA | Crushed, broken limestone | 20 | 11 |
| Raducz Stone | Raducz Stone Corp | Butler County, PA | Dimension sandstone | 5 | 8 |
| S3243 PT 450XHD Sn:pidpt450lomt42281 | Thomas Construction Inc. | Butler County, PA | Construction sand and gravel | 3 | 8 |
| Annandale | Annandale Quarries Inc | Butler County, PA | Dimension sandstone | 10 | 5 |
| Varos Mine | Natural Sand, Co, Inc | Butler County, PA | Sand, common | 3 | 4 |
| K & a Strips | K & a Mining | Butler County, PA | Coal (bituminous) | 5 | 2 |
| Portable Plant 01 (kpi-Jci) | Allegheny Mineral Corp | Butler County, PA | Crushed, broken limestone | 3 | 0 |
| Parker | Glenn O Hawbaker Inc | Butler County, PA | Dimension limestone | 2 | 0 |
| North Washington | Allegheny Mineral Corp | Butler County, PA | Crushed, broken limestone | 1 | 0 |
| Duffy 1 Mine | Neiswonger Construction, Inc. | Butler County, PA | Crushed, broken limestone | 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.