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

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.