Key Takeaway

Twin Underground is a nonproducing underground mine producing Metal, located in Golconda, Humboldt County, NV. It has 128 violations on record (13 S&S) and $268K in proposed penalties. Operated by Nevada Gold Mines LLC.

Twin Underground

NonProducing Underground Metal

Operator: Nevada Gold Mines LLC

Controller: Barrick Nevada Holding LLC; Newmont USA Limited

Location: Golconda, Humboldt County, NV

Employees: 8

128
Violations
13
S&S Violations
10
Accidents
$268K
Penalties

Recent Violations

View all 128 →
Date Section S&S Negligence Penalty
01/07/2026 57.4360(b) Non-S&S ModNegligence $151
12/09/2025 57.14112(b) Non-S&S ModNegligence $151
11/19/2025 57.12032 Non-S&S ModNegligence $193
07/08/2025 57.14100(b) Non-S&S HighNegligence $313
07/08/2025 62.170(b) Non-S&S ModNegligence $151
04/02/2025 57.20014 Non-S&S ModNegligence $151
11/13/2024 57.4104 Non-S&S ModNegligence $147
11/13/2024 57.3360 Non-S&S ModNegligence $239
06/12/2024 57.14107(a) Non-S&S ModNegligence $147
06/12/2024 57.4430(b)(3) Non-S&S ModNegligence $147
01/30/2024 57.11051(a) S&S HighNegligence $1,188
01/30/2024 57.11001 Non-S&S ModNegligence $1,098
12/07/2023 57.11051(b) Non-S&S ModNegligence $143
12/07/2023 57.11051(b) Non-S&S ModNegligence $143
12/05/2023 57.8520 Non-S&S ModNegligence $143
11/16/2023 57.12068 Non-S&S LowNegligence $143
11/15/2023 57.12018 Non-S&S ModNegligence $935
11/15/2023 57.4102 Non-S&S LowNegligence $421
11/15/2023 47.41(b) Non-S&S ModNegligence $905
11/15/2023 57.18002(a) Non-S&S ModNegligence $1,395

Accidents & Injuries

View all 10 →
Date Classification Injury Days Lost
02/09/2026 HANDLING OF MATERIALS DAYS AWAY FROM WORK ONLY None
09/22/2021 HANDLING OF MATERIALS DAYS RESTRICTED ACTIVITY ONLY 4d restricted
06/15/2021 SLIP OR FALL OF PERSON NO DYS AWY FRM WRK,NO RSTR ACT None
01/01/2021 FALL OF ROOF OR BACK ACCIDENT ONLY None
06/02/2020 POWERED HAULAGE NO DYS AWY FRM WRK,NO RSTR ACT None
04/24/2020 FALL OF ROOF OR BACK ACCIDENT ONLY None
01/28/2019 POWERED HAULAGE DAYS RESTRICTED ACTIVITY ONLY 29d restricted
10/11/2017 FALL OF ROOF OR BACK NO DYS AWY FRM WRK,NO RSTR ACT None
04/08/2013 FALL OF FACE/RIB/PILLAR/SIDE/HIGHWALL DAYS RESTRICTED ACTIVITY ONLY 14d restricted
03/06/2013 FALL OF FACE/RIB/PILLAR/SIDE/HIGHWALL DAYS RESTRICTED ACTIVITY ONLY 23d restricted

Inspections

View all 76 →
Begin End Hours Inspectors
01/07/2026 01/08/2026 31.00 1
12/30/2025 12/30/2025 3.25 1
12/08/2025 12/10/2025 29.00 1
11/19/2025 11/19/2025 14.50 1
07/23/2025 07/23/2025 5.75 1
07/08/2025 07/08/2025 12.50 1
04/02/2025 04/02/2025 12.50 1
01/16/2025 01/16/2025 5.25 1
12/16/2024 02/27/2025 6.50 1
11/13/2024 11/14/2024 21.50 1

Mine Details

MSHA Mine ID2602693
Mine TypeUnderground
StatusNonProducing
CommodityMetal
SIC DescriptionGold Ore
Employees8
Days/Week7.0
Hours/Shift0.0
Coordinates41.2152780, -117.1866670
Nearest TownGolconda

Frequently Asked Questions

How many MSHA violations does Twin Underground have?

Twin Underground has 128 MSHA violations on record, of which 13 are classified as Significant & Substantial (S&S). Total proposed penalties amount to $268K.

What type of mine is Twin Underground?

Twin Underground is a Underground mine producing Metal, located in Golconda, Humboldt County, NV. It currently has 8 employees.

Has anyone been injured or killed at Twin Underground?

According to MSHA records, Twin Underground has 10 reported accident/injury records and 0 fatalities on file.

Who operates Twin Underground?

Twin Underground is operated by Nevada Gold Mines LLC and controlled by Barrick Nevada Holding LLC; Newmont USA Limited. MSHA Mine ID: 2602693.