Big Island Mine & Refinery
Active
Underground
Nonmetal
Operator: Sisecam Wyoming, LLC
Controller: Natural Resource Partners LP; Ciner Resources LP
Location: Green River, Sweetwater County, WY
Employees: 437
1,970
Violations
327
S&S Violations
239
Accidents
$789K
Penalties
Recent Violations
View all 1,970 →| Date | Section | S&S | Negligence | Penalty |
|---|---|---|---|---|
| 02/18/2026 | 57.12004 | Non-S&S | ModNegligence | $0 |
| 02/17/2026 | 47.41(a) | Non-S&S | ModNegligence | $0 |
| 02/17/2026 | 57.14205 | Non-S&S | ModNegligence | $0 |
| 02/12/2026 | 57.14112(b) | Non-S&S | ModNegligence | $0 |
| 02/11/2026 | 57.14112(a)(1) | Non-S&S | ModNegligence | $0 |
| 02/11/2026 | 57.12032 | Non-S&S | ModNegligence | $0 |
| 02/11/2026 | 57.14112(a)(1) | Non-S&S | ModNegligence | $0 |
| 02/11/2026 | 57.14112(a)(1) | Non-S&S | ModNegligence | $0 |
| 02/11/2026 | 47.41(a) | Non-S&S | ModNegligence | $0 |
| 02/11/2026 | 57.4102 | Non-S&S | ModNegligence | $0 |
| 02/09/2026 | 57.14205 | Non-S&S | ModNegligence | $0 |
| 01/28/2026 | 57.16006 | Non-S&S | ModNegligence | $0 |
| 12/16/2025 | 57.12004 | Non-S&S | ModNegligence | $151 |
| 12/16/2025 | 57.4361(a) | Non-S&S | HighNegligence | $1,126 |
| 12/15/2025 | 57.5001(a)/57.5005 | Non-S&S | ModNegligence | $0 |
| 12/11/2025 | 49.6(b) | Non-S&S | ModNegligence | $0 |
| 12/11/2025 | 57.14107(a) | Non-S&S | ModNegligence | $209 |
| 12/11/2025 | 57.14112(a)(1) | Non-S&S | ModNegligence | $151 |
| 12/11/2025 | 57.12004 | Non-S&S | ModNegligence | $151 |
| 12/10/2025 | 57.11053(c) | Non-S&S | HighNegligence | $1,679 |
Accidents & Injuries
View all 239 →| Date | Classification | Injury | Days Lost |
|---|---|---|---|
| 05/16/2025 | INUNDATION | ACCIDENT ONLY | None |
| 04/26/2025 | HANDLING OF MATERIALS | DAYS AWAY FROM WORK ONLY | 8d lost |
| 04/02/2025 | HANDLING OF MATERIALS | DAYS RESTRICTED ACTIVITY ONLY | 37d restricted |
| 06/16/2024 | FIRE | ACCIDENT ONLY | None |
| 02/21/2024 | HANDLING OF MATERIALS | DAYS AWAY FROM WORK ONLY | 95d lost |
| 10/10/2023 | HOISTING | ACCIDENT ONLY | None |
| 04/13/2023 | SLIP OR FALL OF PERSON | DAYS RESTRICTED ACTIVITY ONLY | 58d restricted |
| 01/03/2023 | SLIP OR FALL OF PERSON | DAYS AWAY FROM WORK ONLY | 64d lost |
| 12/01/2022 | HANDLING OF MATERIALS | DAYS RESTRICTED ACTIVITY ONLY | 14d restricted |
| 11/07/2022 | HANDLING OF MATERIALS | NO DYS AWY FRM WRK,NO RSTR ACT | None |
Inspections
View all 1,163 →| Begin | End | Hours | Inspectors |
|---|---|---|---|
| 03/04/2026 | 03/04/2026 | 0.00 | 0 |
| 02/18/2026 | 02/18/2026 | 0.00 | 0 |
| 02/18/2026 | 03/02/2026 | 0.00 | 0 |
| 02/11/2026 | 02/11/2026 | 8.00 | 1 |
| 02/02/2026 | 02/02/2026 | 3.50 | 1 |
| 01/26/2026 | 01/26/2026 | 2.50 | 1 |
| 01/08/2026 | 01/08/2026 | 4.50 | 1 |
| 01/05/2026 | 02/23/2026 | 218.00 | 7 |
| 12/30/2025 | 12/31/2025 | 6.00 | 1 |
| 12/22/2025 | 12/22/2025 | 1.50 | 1 |
Mine Details
MSHA Mine ID4800154
Mine TypeUnderground
StatusActive
CommodityNonmetal
SIC DescriptionTrona
Employees437
Days/Week7.0
Hours/Shift12.0
Coordinates41.7205560, -109.6827780
Nearest TownGreen River
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Frequently Asked Questions
How many MSHA violations does Big Island Mine & Refinery have?
Big Island Mine & Refinery has 1970 MSHA violations on record, of which 327 are classified as Significant & Substantial (S&S). Total proposed penalties amount to $789K.
What type of mine is Big Island Mine & Refinery?
Big Island Mine & Refinery is a Underground mine producing Nonmetal, located in Green River, Sweetwater County, WY. It currently has 437 employees.
Has anyone been injured or killed at Big Island Mine & Refinery?
According to MSHA records, Big Island Mine & Refinery has 239 reported accident/injury records and 2 fatalities on file.
Who operates Big Island Mine & Refinery?
Big Island Mine & Refinery is operated by Sisecam Wyoming, LLC and controlled by Natural Resource Partners LP; Ciner Resources LP. MSHA Mine ID: 4800154.