US Calcium LLC: 3 open mines, 20 MSHA citations
Updated November 6, 2026. Source: US Department of Labor, Mine Safety and Health Administration (MSHA), Open Government Data Sets.
US Calcium LLC (MSHA operator ID 0146313) operates 3 open mines with 9 employees in Idaho, mostly crushed, broken limestone. Since January 1, 2022 MSHA inspectors issued it 20 citations and orders with $3,157 in proposed penalties, and it reported no injury or illness cases. Data from MSHA, November 6, 2026.
The request: Watch US Calcium LLC (MSHA operator ID 0146313): each new citation, each accident report and each new mine. $10 of work on sign-up, no card.
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- MSHA operator ID
- 0146313
- Open mines
- 3
- Employees at open mines
- 9
- States
- Idaho
- Citations and orders since January 1, 2022
- 20
- Significant and substantial
- 1 (5.0%)
- Closure orders
- 0
- High negligence or reckless
- 4
- Proposed penalties
- $3,157
- Amount paid so far
- $3,157
- Inspections
- 17
- Inspector hours on site
- 64
- Citations per inspection
- 1.18 (all mines 2.30)
- Accident reports
- 0
- Injury and illness cases
- 0
- Fatalities
- 0
- Latest MSHA record
- July 22, 2026
Open mines of US Calcium LLC
Ranked by citations since January 1, 2022.
| Mine | Operator | County | Main commodity | Employees | Citations since 2022 |
|---|---|---|---|---|---|
| Darlington Mine | US Calcium LLC | Custer County, ID | Crushed, broken limestone | 6 | 14 |
| Gooding Site | US Calcium LLC | Gooding County, ID | Crushed, broken limestone | 3 | 6 |
| Minyu Jaw Crusher | US Calcium LLC | Custer County, ID | Not stated | 0 | 0 |
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 | 1 | $511 | 0 |
| 2023 | 5 | 0 | $715 | 0 |
| 2024 | 9 | 0 | $1,327 | 0 |
| 2025 | 2 | 0 | $302 | 0 |
| 2026 | 2 | 0 | $302 | 0 |
Standards cited most at US Calcium LLC
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 50.30 | Reporting of accidents, injuries and illnesses | 6 |
| 30 CFR 56.12004 | Surface metal and nonmetal mines | 3 |
| 30 CFR 56.14112 | Surface metal and nonmetal mines | 2 |
| 30 CFR 47.41 | Hazard communication | 2 |
| 30 CFR 56.1000 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.12030 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.12008 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.16005 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.12032 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.14211 | Surface metal and nonmetal mines | 1 |
| 30 CFR 56.18002 | Surface metal and nonmetal mines | 1 |
Commodities
| Main commodity | Open mines |
|---|---|
| Crushed, broken limestone | 2 |
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.