Data / Mines / California / Usmc Ione Plant
Usmc Ione Plant: 262 MSHA citations
Updated November 6, 2026. Source: US Department of Labor, Mine Safety and Health Administration (MSHA), Open Government Data Sets.
Usmc Ione Plant is an active construction sand and gravel surface mine in Amador County, California, operated by US Mine Corp with 50 employees on MSHA's record (mine ID 0401878). Since January 1, 2022 MSHA inspectors issued 262 citations and orders there with $479,842 in proposed penalties, and 15 accident reports were filed there, with 15 injury or illness cases.
The request: Watch Usmc Ione Plant (MSHA mine ID 0401878) in Amador County, California: each new citation and each accident report. $10 of work on sign-up, no card.
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- MSHA mine ID
- 0401878
- Status
- Active since November 6, 2016
- Main commodity
- Construction sand and gravel
- Mine type
- Surface
- County
- Amador County, California
- Nearest town
- Ione
- Operator
- US Mine Corp
- Employees
- 50
- MSHA field office
- Vacaville CA Field Office
- Citations and orders since January 1, 2022
- 262
- Significant and substantial
- 62 (23.7%)
- Closure orders
- 8
- High negligence or reckless
- 7
- Proposed penalties
- $479,842
- Amount paid so far
- $286,247
- Inspections
- 37
- Inspector hours on site
- 382
- Citations per inspection
- 7.08 (all mines 2.30)
- Accident reports
- 15
- Injury and illness cases
- 15
- Fatalities
- 0
- Latest MSHA record
- May 26, 2026
- Citations issued to contractors here
- 11 ($1,952 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 | 18 | 4 | $18,680 | 2 |
| 2023 | 4 | 0 | $1,324 | 4 |
| 2024 | 89 | 28 | $205,721 | 5 |
| 2025 | 88 | 7 | $123,012 | 4 |
| 2026 | 63 | 23 | $131,105 | 0 |
Standards cited most at Usmc Ione Plant
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 56.14107 | Surface metal and nonmetal mines | 44 |
| 30 CFR 56.20003 | Surface metal and nonmetal mines | 30 |
| 30 CFR 56.12004 | Surface metal and nonmetal mines | 21 |
| 30 CFR 56.11001 | Surface metal and nonmetal mines | 14 |
| 30 CFR 56.14207 | Surface metal and nonmetal mines | 12 |
| 30 CFR 56.14100 | Surface metal and nonmetal mines | 12 |
| 30 CFR 56.14112 | Surface metal and nonmetal mines | 8 |
| 30 CFR 56.12032 | Surface metal and nonmetal mines | 7 |
| 30 CFR 56.11002 | Surface metal and nonmetal mines | 7 |
| 30 CFR 56.14101 | Surface metal and nonmetal mines | 6 |
| 30 CFR 56.9300 | Surface metal and nonmetal mines | 6 |
| 30 CFR 56.11027 | Surface metal and nonmetal mines | 5 |
| 30 CFR 56.12018 | Surface metal and nonmetal mines | 5 |
| 30 CFR 56.4101 | Surface metal and nonmetal mines | 5 |
| 30 CFR 56.14132 | Surface metal and nonmetal mines | 4 |
Injury and illness cases at Usmc Ione Plant
Accident reports by degree of injury, as the operator reported them to MSHA.
| Degree | Cases |
|---|---|
| Permanent disability | 1 |
| Days away from work or restricted activity | 11 |
| No lost time, or an occupational illness | 3 |
What the accident reports at Usmc Ione Plant describe
Accident classification, as MSHA codes the circumstances that contributed most directly.
| Classification | Reports |
|---|---|
| Handling of materials | 7 |
| Slip or fall of person | 3 |
| Powered haulage | 1 |
| Nonpowered haulage | 1 |
| Machinery | 1 |
| Striking or bumping | 1 |
| Disorders (repeated trauma) | 1 |
Equipment named in accident reports at Usmc Ione Plant
| Equipment | Reports |
|---|---|
| Conveyor | 1 |
| Machine | 1 |
| Hand tools (not powered) | 1 |
| Welding machine | 1 |
| Ore haulage trucks - off highway trucks | 1 |
Other open mines in Amador County, California
| Mine | Operator | County | Main commodity | Employees | Citations since 2022 |
|---|---|---|---|---|---|
| Specialty Granules (Ione) LLC | Isp Granule Products Inc. | Amador County, CA | Construction sand and gravel | 74 | 49 |
| Lincoln Mine Project | Seduli Sutter Operations Corporation | Amador County, CA | Gold ore | 3 | 18 |
| Plymouth Sand & Gravel | Plymouth Sand & Gravel | Amador County, CA | Construction sand and gravel | 6 | 14 |
| Jackson Valley Quarry | George Reed Inc | Amador County, CA | Crushed, broken stone | 15 | 13 |
| Portable #1 Big Plant | Custom Crushing Industries, Inc | Amador County, CA | Construction sand and gravel | 3 | 10 |
| China Hill (Volcano) Quarry | Folsom Ready-Mix, Inc. | Amador County, CA | Crushed, broken stone | 3 | 6 |
| TRP Amador Quarry | Triangle Rock Products | Amador County, CA | Sand, common | 3 | 0 |
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.