Data / Mines / Idaho / Darlington Mine
Darlington Mine, Custer County, Idaho: 14 MSHA citations
Updated November 6, 2026. Source: US Department of Labor, Mine Safety and Health Administration (MSHA), Open Government Data Sets.
Darlington Mine is an intermittent crushed, broken limestone surface mine in Custer County, Idaho, operated by US Calcium LLC with 6 employees on MSHA's record (mine ID 1002277). Since January 1, 2022 MSHA inspectors issued 14 citations and orders there with $2,263 in proposed penalties, and 0 accident reports were filed there, with no injury or illness cases.
The request: Watch Darlington Mine (MSHA mine ID 1002277) in Custer County, Idaho: each new citation and each accident report. $10 of work on sign-up, no card.
SpecStream is the live web data engine for teams and agents. It reads the mine, citation, inspection and accident files that MSHA publishes, and this page is that reading. Ask for the mines of a commodity, state or operator with the operator's headquarters, website and size added from the web, and new mines, new citations and new accident reports arrive in your sheet, CRM, Slack or agent as MSHA posts them.
- MSHA mine ID
- 1002277
- Status
- Intermittent since January 20, 2026
- Main commodity
- Crushed, broken limestone
- Mine type
- Surface
- County
- Custer County, Idaho
- Nearest town
- Arco
- Operator
- US Calcium LLC
- Employees
- 6
- MSHA field office
- Boise ID Field Office
- Citations and orders since January 1, 2022
- 14
- Significant and substantial
- 1 (7.1%)
- Closure orders
- 0
- High negligence or reckless
- 4
- Proposed penalties
- $2,263
- Amount paid so far
- $2,263
- Inspections
- 12
- Inspector hours on site
- 51
- Citations per inspection
- 1.17 (all mines 2.30)
- Accident reports
- 0
- Injury and illness cases
- 0
- Fatalities
- 0
- Latest MSHA record
- July 22, 2026
- Citations issued to contractors here
- 2 ($302 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 | 1 | $511 | 0 |
| 2023 | 5 | 0 | $715 | 0 |
| 2024 | 5 | 0 | $735 | 0 |
| 2026 | 2 | 0 | $302 | 0 |
Standards cited most at Darlington Mine
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 | 5 |
| 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 |
Other open mines in Custer County, Idaho
| Mine | Operator | County | Main commodity | Employees | Citations since 2022 |
|---|---|---|---|---|---|
| Thompson Creek Mine | Thompson Creek Mining Company | Custer County, ID | Molybdenum ore | 233 | 28 |
| C R M Pit #1 | 3BW LLC | Custer County, ID | Construction sand and gravel | 2 | 4 |
| Mobile Screen Plant | P-Diamond LLC | Custer County, ID | Crushed, broken limestone | 1 | 0 |
| Minyu Jaw Crusher | US Calcium LLC | Custer County, ID | Not stated | 0 | 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.