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
Operator: Nevada Gold Mines LLC
Controller: Barrick Nevada Holding LLC; Newmont USA Limited
Location: Golconda, Humboldt County, NV
Employees: 8
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
Related Mines
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.