Kennecott Keystone Underground
Active
Underground
Metal
Operator: Kennecott Utah Copper LLC
Controller: Rio Tinto Group
Location: Copperton, Salt Lake County, UT
Employees: 31
251
Violations
34
S&S Violations
59
Accidents
$395K
Penalties
Recent Violations
View all 251 →| Date | Section | S&S | Negligence | Penalty |
|---|---|---|---|---|
| 03/03/2026 | 48.7(a) | Non-S&S | ModNegligence | $0 |
| 03/03/2026 | 57.11051(b) | Non-S&S | ModNegligence | $0 |
| 03/03/2026 | 57.11051(b) | Non-S&S | ModNegligence | $0 |
| 02/04/2026 | 57.14100(b) | Non-S&S | ModNegligence | $0 |
| 02/03/2026 | 57.14103(b) | Non-S&S | ModNegligence | $0 |
| 02/03/2026 | 57.14100(c) | Non-S&S | ModNegligence | $0 |
| 02/03/2026 | 57.12004 | Non-S&S | ModNegligence | $0 |
| 02/03/2026 | 57.14132(a) | S&S | ModNegligence | $0 |
| 02/03/2026 | 57.12032 | Non-S&S | ModNegligence | $0 |
| 02/03/2026 | 57.12018 | Non-S&S | ModNegligence | $0 |
| 02/03/2026 | 57.13020 | Non-S&S | ModNegligence | $0 |
| 02/03/2026 | 57.20011 | Non-S&S | ModNegligence | $0 |
| 02/03/2026 | 57.12006 | Non-S&S | ModNegligence | $0 |
| 02/03/2026 | 57.12018 | Non-S&S | ModNegligence | $0 |
| 02/02/2026 | 57.14207 | Non-S&S | ModNegligence | $0 |
| 02/02/2026 | 57.4201(a)(2) | Non-S&S | ModNegligence | $0 |
| 02/02/2026 | 57.12068 | Non-S&S | ModNegligence | $0 |
| 02/02/2026 | 48.7(a) | S&S | ModNegligence | $0 |
| 02/02/2026 | 57.12023 | Non-S&S | ModNegligence | $0 |
| 12/10/2025 | 50.10(b) | Non-S&S | ModNegligence | $7,555 |
Accidents & Injuries
View all 59 →| Date | Classification | Injury | Days Lost |
|---|---|---|---|
| 02/06/2026 | INUNDATION | NO DYS AWY FRM WRK,NO RSTR ACT | None |
| 11/28/2025 | HANDLING OF MATERIALS | NO DYS AWY FRM WRK,NO RSTR ACT | None |
| 11/04/2025 | POWERED HAULAGE | DAYS RESTRICTED ACTIVITY ONLY | 3d restricted |
| 09/17/2025 | HANDLING OF MATERIALS | NO DYS AWY FRM WRK,NO RSTR ACT | None |
| 09/11/2025 | HANDLING OF MATERIALS | DAYS RESTRICTED ACTIVITY ONLY | 3d restricted |
| 07/01/2025 | HANDLING OF MATERIALS | NO DYS AWY FRM WRK,NO RSTR ACT | None |
| 06/10/2025 | HANDTOOLS (NONPOWERED) | DYS AWY FRM WRK & RESTRCTD ACT | 3d lost, 3d restricted |
| 03/29/2025 | POWERED HAULAGE | NO DYS AWY FRM WRK,NO RSTR ACT | None |
| 02/03/2025 | SLIP OR FALL OF PERSON | DAYS RESTRICTED ACTIVITY ONLY | 42d restricted |
| 08/24/2024 | SLIP OR FALL OF PERSON | DAYS AWAY FROM WORK ONLY | 70d lost |
Inspections
View all 113 →| Begin | End | Hours | Inspectors |
|---|---|---|---|
| 02/02/2026 | 91.00 | 3 | |
| 12/15/2025 | 12/15/2025 | 8.00 | 1 |
| 12/10/2025 | 12/10/2025 | 1.00 | 1 |
| 12/04/2025 | 12/08/2025 | 6.50 | 1 |
| 10/27/2025 | 11/06/2025 | 64.00 | 1 |
| 10/16/2025 | 11/06/2025 | 12.00 | 1 |
| 09/23/2025 | 09/26/2025 | 27.00 | 1 |
| 09/11/2025 | 09/15/2025 | 5.50 | 1 |
| 08/04/2025 | 08/14/2025 | 86.00 | 2 |
| 07/30/2025 | 07/30/2025 | 2.00 | 1 |
Mine Details
MSHA Mine ID4201392
Mine TypeUnderground
StatusActive
CommodityMetal
SIC DescriptionCopper Ore NEC
Employees31
Days/Week5.0
Hours/Shift8.0
Coordinates40.5647220, -112.1002780
Nearest TownCopperton
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Frequently Asked Questions
How many MSHA violations does Kennecott Keystone Underground have?
Kennecott Keystone Underground has 251 MSHA violations on record, of which 34 are classified as Significant & Substantial (S&S). Total proposed penalties amount to $395K.
What type of mine is Kennecott Keystone Underground?
Kennecott Keystone Underground is a Underground mine producing Metal, located in Copperton, Salt Lake County, UT. It currently has 31 employees.
Has anyone been injured or killed at Kennecott Keystone Underground?
According to MSHA records, Kennecott Keystone Underground has 59 reported accident/injury records and 0 fatalities on file.
Who operates Kennecott Keystone Underground?
Kennecott Keystone Underground is operated by Kennecott Utah Copper LLC and controlled by Rio Tinto Group. MSHA Mine ID: 4201392.