Powder River Proppants, LLC · Struck against stationary object
Employee stepped on a nail. puncturing through EE's left boot into EE's left big toe.
Glenrock Mine 01 Metal/Non-Metal
Powder River Proppants, LLC
· Surface
Controlled by
BGD LLC; Founders of PRP LLC
Glenrock,
Converse County,
WY
·
Active
MSHA Mine ID: 4801891
Glenrock Mine 01 has $3K in proposed MSHA penalties and $2K outstanding across 1 contested dockets, plus health sampling and the full incident record.
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- Fatalities
- 0
- Total incidents
- 4
- Years on record
- 2025–2026
- Latest incident
- Jan 2026
Compliance record
MSHA citations since 2024
19
citations
5
significant & substantial
$2,842
proposed penalties
$1,322
paid to date
47% of proposed penalties paid to date, a $1,520 gap.
Source: MSHA violations data, updated weekly.
Inspection activity
MSHA inspections since 2024
7
inspections on record
260
inspection hours
n/a
citations per 100 inspection hours
ⓘ
This rate is recorded citations divided by MSHA inspection hours, per 100 hours. It reflects inspection effort, not mine size or production.Rate withheld: 260 inspection hours is too few for a stable rate. A minimum of 1,000 inspection hours is required.
Source: MSHA inspections data, updated weekly.
Glenrock Mine 01 has $3K in proposed MSHA penalties and $2K outstanding across 1 contested dockets.
Penalty disposition
ⓘ
Differences between proposed and paid penalties reflect both settlements and conference reductions and amounts still owed. Outstanding is the balance currently owed.$3K
proposed penalties
$3K
current assessed
$1K
paid to date
$2K
outstanding
9 assessments are final orders; 1 contested dockets.
As of the most recent assessment on 2026-04-07.
Source: MSHA assessed-violations and conference/litigation data, updated weekly.
See also
the operator's enforcement record
Quarterly safety rates
ⓘ
Citations per million reported employee-hours. Rates begin in 2000, when MSHA's quarterly employment data starts; earlier incidents are counted but cannot be rate-adjusted. Quarters under 100,000 reported hours are greyed: too few hours for a stable rate.Citations per million employee-hours, as reported to MSHA
| Quarter | Hours worked | Citations | S&S | Per 1M hrs |
|---|---|---|---|---|
| 2025 Q4 | 12,996 | 4 | 1 | 307.8 |
| 2025 Q3 | 28,512 | 4 | 2 | 140.3 |
| 2025 Q2 | 16,894 | 0 | 0 | 0.0 |
| 2025 Q1 | 19,158 | 6 | 2 | 313.2 |
| 2024 Q4 | 9,770 | 4 | 0 | 409.4 |
No fatalities recorded at this mine.
Reportable incidents
4 on file2026 · 1 incident
2025 · 3 incidents
Powder River Proppants, LLC · Inhalation of radiations, caustics, toxic and noxious substances
Employee was welding wear iron on an excavator bucket when a wind shift reduced ventilation, leading to fume inhalation. The employee reported shortness of breath and chest pressure and received first aid on site before being transported to the ER. The employee was released the same day, cleared to return to work the next day, and diagnosed with airway irritation.
September 11, 2025
WY · Metal/Non-Metal
bulldozer operator, universal operator, heavy equipment operator, operating engineer
MACHINERY
Powder River Proppants, LLC · Struck against a moving object
Employee was Operating a haul truck being loaded by an excavator. Employee stated that the Excavator struck the haul truck on the back and caused an injury to Employees Neck/Back. Employee refused first aid and or urgent care. Employee later turned in medical paperwork to MSHA.
Powder River Proppants, LLC · Struck by falling object
The employee was removing/replacing the guard while the bucket elevator ran. The guard slipped into the opening, getting caught by moving buckets, causing the guard to slam down on employee's lower leg, causing a tibia and fibula fracture.
For insurers, brokers, and safety consultants
The full compliance file on Glenrock Mine 01
A dated report covering the 26-year penalty trail, line-item violation pattern, contest and docket posture, rate-normalized peer benchmark, and full fatality history. Delivered as a PDF with the underlying data as CSV.