USMC Ione Plant
Active
Surface
SandAndGravel
Operator: US Mine Corp
Controller: John Bremer; Brady Barto
Location: IONE, Amador County, CA
Employees: 50
606
Violations
127
S&S Violations
58
Accidents
$537K
Penalties
Recent Violations
View all 606 →| Date | Section | S&S | Negligence | Penalty |
|---|---|---|---|---|
| 11/25/2025 | 47.51(a) | Non-S&S | LowNegligence | $245 |
| 11/25/2025 | 56.11001 | Non-S&S | LowNegligence | $165 |
| 11/13/2025 | 56.11001 | Non-S&S | ModNegligence | $366 |
| 11/13/2025 | 56.13011 | Non-S&S | ModNegligence | $1,219 |
| 11/13/2025 | 56.14107(a) | Non-S&S | ModNegligence | $1,679 |
| 11/12/2025 | 56.15005 | Non-S&S | ModNegligence | $366 |
| 11/12/2025 | 56.14112(b) | Non-S&S | ModNegligence | $366 |
| 11/12/2025 | 56.14100(b) | Non-S&S | ModNegligence | $366 |
| 11/10/2025 | 56.20010 | Non-S&S | LowNegligence | $165 |
| 11/10/2025 | 56.14107 | Non-S&S | ModNegligence | $366 |
| 11/10/2025 | 56.13001 | Non-S&S | ModNegligence | $366 |
| 11/10/2025 | 47.51 | Non-S&S | ModNegligence | $366 |
| 11/10/2025 | 56.16012 | Non-S&S | ModNegligence | $366 |
| 11/05/2025 | 56.11002 | Non-S&S | ModNegligence | $1,219 |
| 11/05/2025 | 56.11006 | Non-S&S | ModNegligence | $366 |
| 11/05/2025 | 56.12004 | Non-S&S | ModNegligence | $1,550 |
| 11/05/2025 | 56.14107(a) | Non-S&S | ModNegligence | $1,679 |
| 11/05/2025 | 56.14107(a) | Non-S&S | ModNegligence | $1,679 |
| 11/05/2025 | 56.12025 | Non-S&S | ModNegligence | $1,219 |
| 11/05/2025 | 56.14112(a) | Non-S&S | ModNegligence | $366 |
Accidents & Injuries
View all 58 →| Date | Classification | Injury | Days Lost |
|---|---|---|---|
| 08/06/2025 | NONPOWERED HAULAGE | NO DYS AWY FRM WRK,NO RSTR ACT | None |
| 06/04/2025 | HANDLING OF MATERIALS | DAYS AWAY FROM WORK ONLY | None |
| 04/11/2025 | HANDLING OF MATERIALS | DAYS AWAY FROM WORK ONLY | 5d lost |
| 03/24/2025 | DISORDERS (REPEATED TRAUMA) | OCCUPATNAL ILLNESS NOT DEG 1-6 | 6d lost, 2d restricted |
| 11/14/2024 | MACHINERY | DYS AWY FRM WRK & RESTRCTD ACT | 1d lost, 5d restricted |
| 10/02/2024 | HANDLING OF MATERIALS | DAYS AWAY FROM WORK ONLY | 3d lost |
| 10/02/2024 | HANDLING OF MATERIALS | DYS AWY FRM WRK & RESTRCTD ACT | 12d lost, 11d restricted |
| 06/04/2024 | SLIP OR FALL OF PERSON | DAYS AWAY FROM WORK ONLY | 212d lost |
| 03/28/2024 | SLIP OR FALL OF PERSON | DAYS AWAY FROM WORK ONLY | 53d lost |
| 10/04/2023 | HANDLING OF MATERIALS | DYS AWY FRM WRK & RESTRCTD ACT | 45d lost, 43d restricted |
Inspections
View all 104 →| Begin | End | Hours | Inspectors |
|---|---|---|---|
| 01/26/2026 | 01/26/2026 | 4.75 | 1 |
| 01/20/2026 | 01/22/2026 | 18.25 | 1 |
| 01/07/2026 | 01/07/2026 | 8.25 | 2 |
| 12/17/2025 | 12/17/2025 | 10.00 | 1 |
| 11/24/2025 | 12/01/2025 | 16.75 | 1 |
| 11/05/2025 | 11/06/2025 | 12.00 | 1 |
| 10/14/2025 | 11/17/2025 | 12.25 | 2 |
| 09/09/2025 | 09/10/2025 | 22.25 | 1 |
| 09/02/2025 | 09/03/2025 | 18.50 | 1 |
| 04/13/2025 | 04/23/2025 | 55.00 | 1 |
Mine Details
MSHA Mine ID0401878
Mine TypeSurface
StatusActive
CommoditySandAndGravel
SIC DescriptionConstruction Sand and Gravel
Employees50
Days/Week7.0
Hours/Shift8.0
Coordinates38.3341670, -120.9463890
Nearest TownIONE
Related Mines
Specialty Granules (Ione) LLC
ione, Amador County, CA
330 violations
Active
Plymouth Sand & Gravel
plymouth, Amador County, CA
160 violations
Intermittent
Jackson Valley Quarry
Ione, Amador County, CA
131 violations
Active
Portable #1 Big Plant
various, Amador County, CA
93 violations
Intermittent
Goose Hill Rock
PLYMOUTH, Amador County, CA
91 violations
Abandoned
China Hill (Volcano) Quarry
CHINA HILL, Amador County, CA
78 violations
Temporarily Idled
LINCOLN MINE PROJECT
Amador City, Amador County, CA
63 violations
NonProducing
Upper Dry Creek Slate Mine
drytown, Amador County, CA
63 violations
Abandoned
Frequently Asked Questions
How many MSHA violations does USMC Ione Plant have?
USMC Ione Plant has 606 MSHA violations on record, of which 127 are classified as Significant & Substantial (S&S). Total proposed penalties amount to $537K.
What type of mine is USMC Ione Plant?
USMC Ione Plant is a Surface mine producing SandAndGravel, located in IONE, Amador County, CA. It currently has 50 employees.
Has anyone been injured or killed at USMC Ione Plant?
According to MSHA records, USMC Ione Plant has 58 reported accident/injury records and 0 fatalities on file.
Who operates USMC Ione Plant?
USMC Ione Plant is operated by US Mine Corp and controlled by John Bremer; Brady Barto. MSHA Mine ID: 0401878.