Key Takeaway
Lone Tree Mine is a active surface mine producing Metal, located in Valmy, Humboldt County, NV. It has 193 violations on record (22 S&S) and $45K in proposed penalties. Operated by Goldcorp DEE LLC.
Lone Tree Mine
Operator: Goldcorp DEE LLC
Controller: i-80 Gold Corp
Location: Valmy, Humboldt County, NV
Employees: 52
Recent Violations
View all 193 →| Date | Section | S&S | Negligence | Penalty |
|---|---|---|---|---|
| 07/09/2025 | 56.4102 | Non-S&S | ModNegligence | $151 |
| 07/15/2022 | 56.12004 | Non-S&S | ModNegligence | $133 |
| 07/15/2022 | 56.16005 | Non-S&S | ModNegligence | $133 |
| 07/15/2022 | 47.41(a)(1) | Non-S&S | ModNegligence | $133 |
| 03/07/2022 | 56.4104(a) | Non-S&S | ModNegligence | $133 |
| 03/07/2022 | 56.12028 | Non-S&S | ModNegligence | $133 |
| 03/07/2022 | 56.12028 | Non-S&S | ModNegligence | $133 |
| 06/30/2021 | 56.14206(b) | Non-S&S | ModNegligence | $125 |
| 06/30/2021 | 56.4201(a)(2) | Non-S&S | ModNegligence | $125 |
| 03/30/2021 | 56.12004 | Non-S&S | ModNegligence | $125 |
| 03/30/2021 | 56.12004 | Non-S&S | ModNegligence | $202 |
| 05/07/2020 | 56.12032 | Non-S&S | LowNegligence | $123 |
| 12/26/2019 | 56.15001 | Non-S&S | ModNegligence | $123 |
| 12/26/2019 | 56.20011 | Non-S&S | LowNegligence | $123 |
| 05/21/2019 | 47.41(a) | Non-S&S | ModNegligence | $121 |
| 05/15/2019 | 56.14107(a) | Non-S&S | ModNegligence | $121 |
| 05/15/2019 | 47.41(a)(1) | Non-S&S | ModNegligence | $121 |
| 05/14/2019 | 56.14100(b) | Non-S&S | ModNegligence | $121 |
| 05/14/2019 | 56.4102 | Non-S&S | ModNegligence | $121 |
| 03/11/2019 | 56.14132(a) | Non-S&S | ModNegligence | $121 |
Accidents & Injuries
View all 116 →| Date | Classification | Injury | Days Lost |
|---|---|---|---|
| 06/05/2025 | HANDLING OF MATERIALS | NO DYS AWY FRM WRK,NO RSTR ACT | None |
| 05/31/2024 | HANDTOOLS (NONPOWERED) | NO DYS AWY FRM WRK,NO RSTR ACT | None |
| 01/25/2023 | EXPLODING VESSELS UNDER PRESSURE | DAYS AWAY FROM WORK ONLY | 2d lost |
| 01/29/2022 | HANDLING OF MATERIALS | NO DYS AWY FRM WRK,NO RSTR ACT | None |
| 01/04/2016 | SLIP OR FALL OF PERSON | DAYS RESTRICTED ACTIVITY ONLY | 9d restricted |
| 02/02/2015 | SLIP OR FALL OF PERSON | DYS AWY FRM WRK & RESTRCTD ACT | 96d lost, 35d restricted |
| 04/11/2013 | HANDLING OF MATERIALS | DYS AWY FRM WRK & RESTRCTD ACT | 9d lost, 65d restricted |
| 02/09/2013 | HANDLING OF MATERIALS | DAYS RESTRICTED ACTIVITY ONLY | 53d restricted |
| 05/24/2012 | SLIP OR FALL OF PERSON | DAYS RESTRICTED ACTIVITY ONLY | 188d restricted |
| 11/13/2010 | HANDLING OF MATERIALS | DAYS AWAY FROM WORK ONLY | 136d lost |
Inspections
View all 72 →| Begin | End | Hours | Inspectors |
|---|---|---|---|
| 03/03/2026 | 0.00 | 0 | |
| 02/15/2026 | 02/15/2026 | 7.50 | 1 |
| 07/09/2025 | 07/10/2025 | 19.00 | 1 |
| 02/08/2025 | 02/12/2025 | 14.25 | 1 |
| 03/14/2024 | 03/14/2024 | 14.00 | 1 |
| 03/12/2024 | 03/14/2024 | 9.75 | 2 |
| 09/14/2023 | 09/15/2023 | 9.00 | 1 |
| 06/07/2023 | 06/07/2023 | 18.50 | 2 |
| 05/17/2023 | 05/17/2023 | 2.50 | 1 |
| 07/14/2022 | 07/18/2022 | 13.00 | 1 |
Mine Details
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Frequently Asked Questions
How many MSHA violations does Lone Tree Mine have?
Lone Tree Mine has 193 MSHA violations on record, of which 22 are classified as Significant & Substantial (S&S). Total proposed penalties amount to $45K.
What type of mine is Lone Tree Mine?
Lone Tree Mine is a Surface mine producing Metal, located in Valmy, Humboldt County, NV. It currently has 52 employees.
Has anyone been injured or killed at Lone Tree Mine?
According to MSHA records, Lone Tree Mine has 116 reported accident/injury records and 0 fatalities on file.
Who operates Lone Tree Mine?
Lone Tree Mine is operated by Goldcorp DEE LLC and controlled by i-80 Gold Corp. MSHA Mine ID: 2602159.