Data / Mines / Nevada / Twin Underground
Twin Underground, Humboldt County, Nevada: 22 MSHA citations
Updated November 6, 2026. Source: US Department of Labor, Mine Safety and Health Administration (MSHA), Open Government Data Sets.
Twin Underground is a nonproducing gold ore underground mine in Humboldt County, Nevada, operated by Nevada Gold Mines LLC with 8 employees on MSHA's record (mine ID 2602693). Since January 1, 2022 MSHA inspectors issued 22 citations and orders there with $4,547 in proposed penalties, and 2 accident reports were filed there, with 2 injury or illness cases.
The request: Watch Twin Underground (MSHA mine ID 2602693) in Humboldt County, Nevada: each new citation and each accident report. $10 of work on sign-up, no card.
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- MSHA mine ID
- 2602693
- Status
- NonProducing since November 26, 2024
- Main commodity
- Gold ore
- Mine type
- Underground
- County
- Humboldt County, Nevada
- Nearest town
- Golconda
- Operator
- Nevada Gold Mines LLC
- Employees
- 8
- MSHA field office
- Elko NV Field Office
- Citations and orders since January 1, 2022
- 22
- Significant and substantial
- 1 (4.5%)
- Closure orders
- 0
- High negligence or reckless
- 2
- Proposed penalties
- $4,547
- Amount paid so far
- $4,547
- Inspections
- 30
- Inspector hours on site
- 356
- Citations per inspection
- 0.73 (all mines 2.30)
- Accident reports
- 2
- Injury and illness cases
- 2
- Fatalities
- 0
- Latest MSHA record
- October 6, 2026
- Citations issued to contractors here
- 19 ($212,851 proposed)
Citations and injury cases by year
Calendar years since 2022; 2026 runs to the date of the MSHA files.
| Year | Citations and orders | Significant and substantial | Proposed penalties | Injury and illness cases |
|---|---|---|---|---|
| 2022 | 2 | 0 | $266 | 0 |
| 2023 | 7 | 0 | $1,001 | 0 |
| 2024 | 5 | 1 | $1,868 | 0 |
| 2025 | 5 | 0 | $959 | 0 |
| 2026 | 3 | 0 | $453 | 2 |
Standards cited most at Twin Underground
Sections of Title 30 of the Code of Federal Regulations named on the citations, with the part each belongs to.
| Standard | What the part covers | Citations |
|---|---|---|
| 30 CFR 57.11051 | Underground metal and nonmetal mines | 3 |
| 30 CFR 47.41 | Hazard communication | 3 |
| 30 CFR 57.4360 | Underground metal and nonmetal mines | 1 |
| 30 CFR 57.20014 | Underground metal and nonmetal mines | 1 |
| 30 CFR 57.12018 | Underground metal and nonmetal mines | 1 |
| 30 CFR 57.14107 | Underground metal and nonmetal mines | 1 |
| 30 CFR 57.4430 | Underground metal and nonmetal mines | 1 |
| 30 CFR 57.14100 | Underground metal and nonmetal mines | 1 |
| 30 CFR 62.170 | Occupational noise exposure | 1 |
| 30 CFR 41.13 | Notice of legal identity | 1 |
| 30 CFR 56.4104 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.11003 | Surface metal and nonmetal mines | 1 |
| 30 CFR 57.4104 | Underground metal and nonmetal mines | 1 |
| 30 CFR 57.3360 | Underground metal and nonmetal mines | 1 |
| 30 CFR 57.12068 | Underground metal and nonmetal mines | 1 |
Injury and illness cases at Twin Underground
Accident reports by degree of injury, as the operator reported them to MSHA.
| Degree | Cases |
|---|---|
| Days away from work or restricted activity | 2 |
What the accident reports at Twin Underground describe
Accident classification, as MSHA codes the circumstances that contributed most directly.
| Classification | Reports |
|---|---|
| Handtools (nonpowered) | 1 |
| Handling of materials | 1 |
Equipment named in accident reports at Twin Underground
| Equipment | Reports |
|---|---|
| Hand tools (not powered) | 1 |
Other open mines in Humboldt County, Nevada
| Mine | Operator | County | Main commodity | Employees | Citations since 2022 |
|---|---|---|---|---|---|
| Turquoise Ridge | Nevada Gold Mines LLC | Humboldt County, NV | Gold ore | 455 | 848 |
| Marigold Mine | Marigold Mining Co | Humboldt County, NV | Gold ore | 304 | 109 |
| Twin Creeks Mine | Nevada Gold Mines LLC | Humboldt County, NV | Gold ore | 450 | 102 |
| Granite Creek Mine | Osgood Mining Company, LLC | Humboldt County, NV | Gold ore | 125 | 26 |
| Min-Ad Inc | Min-Ad Inc | Humboldt County, NV | Crushed, broken limestone | 13 | 11 |
| Lone Tree Mine | Goldcorp Dee LLC | Humboldt County, NV | Gold ore | 52 | 10 |
| Hwy 95 Pit | Nevada Building Supply LLC | Humboldt County, NV | Sand, common | 2 | 10 |
| Portable Crusher #2 (P-450) | Bolinder Resources | Humboldt County, NV | Construction sand and gravel | 2 | 9 |
| Hycroft Mine | Hycroft Resources & Development, LLC | Humboldt County, NV | Gold ore | 440 | 7 |
| Thacker Pass | Lithium Nevada Corp. | Humboldt County, NV | Lithium minerals | 50 | 6 |
| Finlay 696 | Nevada Building Supply LLC | Humboldt County, NV | Sand, common | 3 | 6 |
| Portable 1 | Bolinder Resources | Humboldt County, NV | Construction sand and gravel | 3 | 6 |
| Kolberg 1822PH Washplant S/N406286 | H E Hunewill Construction Company Inc | Humboldt County, NV | Sand, common | 1 | 5 |
| Stall Ranch Pit | Nevada Building Supply LLC | Humboldt County, NV | Construction sand and gravel | 4 | 4 |
| Terex Cedar Rapids MVP380 | H E Hunewill Construction Company Inc | Humboldt County, NV | Construction sand and gravel | 5 | 3 |
US government work, public domain. Counts come from the MSHA files published on November 6, 2026. An open mine is one MSHA lists as Active, Intermittent, New Mine, Temporarily Idled or NonProducing; 13,673 were open that day. Citations, penalties, inspections and accident reports run from January 1, 2022. A citation is an inspector's allegation and an operator can contest it; the penalty is the amount MSHA first proposed, before any contest or settlement. An operator is the legal entity MSHA assesses, and a parent company is its controller. Mines run by sole proprietors or by individuals are counted in every total and are not named. This page uses MSHA data and is not endorsed or certified by MSHA. Free to reuse with credit to SpecStream under CC BY 4.0. Spot a wrong value? Write to [email protected] with the link to this page.