LONE STAR PRYOR PLT MILL & QY
Active
Surface
Stone
Operator: Buzzi Unicem USA
Controller: Buzzi S p A
Location: Pryor, Mayes County, OK
Employees: 136
923
Violations
227
S&S Violations
234
Accidents
$1.2M
Penalties
Recent Violations
View all 923 →| Date | Section | S&S | Negligence | Penalty |
|---|---|---|---|---|
| 12/04/2025 | 56.14100(b) | Non-S&S | LowNegligence | $209 |
| 12/03/2025 | 56.12040 | Non-S&S | ModNegligence | $549 |
| 12/03/2025 | 56.14107(a) | Non-S&S | ModNegligence | $245 |
| 12/03/2025 | 56.14112(b) | S&S | ModNegligence | $1,219 |
| 12/03/2025 | 56.14209(b) | Non-S&S | ModNegligence | $165 |
| 12/03/2025 | 56.20003(a) | Non-S&S | ModNegligence | $165 |
| 12/03/2025 | 56.14100(b) | S&S | HighNegligence | $27,603 |
| 12/02/2025 | 56.14105 | Non-S&S | LowNegligence | $288 |
| 12/02/2025 | 56.14100(b) | Non-S&S | ModNegligence | $592 |
| 12/02/2025 | 56.14130(c) | Non-S&S | ModNegligence | $151 |
| 12/02/2025 | 56.20003(a) | S&S | ModNegligence | $959 |
| 12/02/2025 | 56.12018 | Non-S&S | LowNegligence | $151 |
| 12/02/2025 | 56.13021 | Non-S&S | LowNegligence | $151 |
| 12/02/2025 | 56.12018 | Non-S&S | LowNegligence | $151 |
| 11/30/2025 | 50.10(d) | Non-S&S | ModNegligence | $151 |
| 08/28/2025 | 56.20003(a) | Non-S&S | ModNegligence | $193 |
| 08/28/2025 | 56.4201(a)(1) | Non-S&S | LowNegligence | $151 |
| 07/21/2025 | 50.20(a) | Non-S&S | HighNegligence | $151 |
| 05/18/2025 | 56.4603(c) | Non-S&S | LowNegligence | $209 |
| 05/18/2025 | 56.14107(a) | Non-S&S | ModNegligence | $697 |
Accidents & Injuries
View all 234 →| Date | Classification | Injury | Days Lost |
|---|---|---|---|
| 11/30/2025 | IGNITION OR EXPLOSION OF GAS OR DUST | ACCIDENT ONLY | None |
| 08/18/2025 | HANDTOOLS (NONPOWERED) | NO DYS AWY FRM WRK,NO RSTR ACT | None |
| 08/18/2025 | SLIP OR FALL OF PERSON | NO DYS AWY FRM WRK,NO RSTR ACT | None |
| 05/26/2025 | HANDLING OF MATERIALS | DAYS AWAY FROM WORK ONLY | 40d lost |
| 05/21/2025 | SLIP OR FALL OF PERSON | DAYS AWAY FROM WORK ONLY | None |
| 05/03/2025 | HANDTOOLS (NONPOWERED) | NO DYS AWY FRM WRK,NO RSTR ACT | None |
| 04/25/2025 | SLIP OR FALL OF PERSON | DAYS AWAY FROM WORK ONLY | None |
| 01/21/2025 | OTHER | NO DYS AWY FRM WRK,NO RSTR ACT | None |
| 01/14/2025 | SLIP OR FALL OF PERSON | DYS AWY FRM WRK & RESTRCTD ACT | 72d lost, 55d restricted |
| 12/11/2024 | OTHER | DAYS AWAY FROM WORK ONLY | 134d lost |
Inspections
View all 148 →| Begin | End | Hours | Inspectors |
|---|---|---|---|
| 01/20/2026 | 01/20/2026 | 12.00 | 1 |
| 12/15/2025 | 12/15/2025 | 6.00 | 1 |
| 12/01/2025 | 12/04/2025 | 65.75 | 2 |
| 12/01/2025 | 12/03/2025 | 14.75 | 1 |
| 08/28/2025 | 08/28/2025 | 10.50 | 1 |
| 08/05/2025 | 08/06/2025 | 2.00 | 1 |
| 05/12/2025 | 05/22/2025 | 62.75 | 1 |
| 01/30/2025 | 01/31/2025 | 2.50 | 1 |
| 01/27/2025 | 02/05/2025 | 69.25 | 1 |
| 11/20/2024 | 01/06/2025 | 11.00 | 1 |
Mine Details
MSHA Mine ID3401289
Mine TypeSurface
StatusActive
CommodityStone
SIC DescriptionCement
Employees136
Days/Week7.0
Hours/Shift12.0
Coordinates35.9869440, -95.2811110
Nearest TownPryor
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Frequently Asked Questions
How many MSHA violations does LONE STAR PRYOR PLT MILL & QY have?
LONE STAR PRYOR PLT MILL & QY has 923 MSHA violations on record, of which 227 are classified as Significant & Substantial (S&S). Total proposed penalties amount to $1.2M.
What type of mine is LONE STAR PRYOR PLT MILL & QY?
LONE STAR PRYOR PLT MILL & QY is a Surface mine producing Stone, located in Pryor, Mayes County, OK. It currently has 136 employees.
Has anyone been injured or killed at LONE STAR PRYOR PLT MILL & QY?
According to MSHA records, LONE STAR PRYOR PLT MILL & QY has 234 reported accident/injury records and 0 fatalities on file.
Who operates LONE STAR PRYOR PLT MILL & QY?
LONE STAR PRYOR PLT MILL & QY is operated by Buzzi Unicem USA and controlled by Buzzi S p A. MSHA Mine ID: 3401289.