Key Takeaway
Darlington Mine is a intermittent surface mine producing Stone, located in Arco, Custer County, ID. It has 47 violations on record (8 S&S) and $10K in proposed penalties. Operated by US Calcium LLC.
Darlington Mine
Operator: US Calcium LLC
Controller: Halycon LLC; Sharp Resources LLC; Patten Resources LLC
Location: Arco, Custer County, ID
Employees: 6
Recent Violations
View all 47 →| Date | Section | S&S | Negligence | Penalty |
|---|---|---|---|---|
| 01/12/2026 | 56.1000 | Non-S&S | ModNegligence | $151 |
| 07/16/2025 | 50.30(a) | Non-S&S | ModNegligence | $151 |
| 04/15/2025 | 56.14132(b)(1)(i) | Non-S&S | LowNegligence | $151 |
| 04/15/2025 | 56.14107(a) | Non-S&S | ModNegligence | $151 |
| 10/08/2024 | 56.14112(b) | Non-S&S | LowNegligence | $147 |
| 02/07/2024 | 56.14112(b) | Non-S&S | LowNegligence | $147 |
| 01/16/2024 | 50.30(a) | Non-S&S | HighNegligence | $147 |
| 10/16/2023 | 50.30(a) | Non-S&S | HighNegligence | $147 |
| 07/16/2023 | 50.30(a) | Non-S&S | HighNegligence | $147 |
| 05/31/2023 | 47.41(a) | Non-S&S | ModNegligence | $143 |
| 05/31/2023 | 47.41(a) | Non-S&S | ModNegligence | $143 |
| 05/31/2023 | 56.12004 | Non-S&S | HighNegligence | $143 |
| 04/16/2023 | 50.30(a) | Non-S&S | ModNegligence | $143 |
| 03/08/2023 | 56.12004 | Non-S&S | ModNegligence | $143 |
| 01/13/2022 | 56.12030 | S&S | ModNegligence | $378 |
| 01/13/2022 | 56.12004 | Non-S&S | ModNegligence | $133 |
| 12/09/2020 | 56.18002(b) | Non-S&S | ModNegligence | $125 |
| 12/09/2020 | 56.12006 | Non-S&S | ModNegligence | $125 |
| 12/09/2020 | 56.12032 | Non-S&S | ModNegligence | $125 |
| 12/09/2020 | 56.14107(a) | Non-S&S | ModNegligence | $125 |
Inspections
View all 36 →| Begin | End | Hours | Inspectors |
|---|---|---|---|
| 01/12/2026 | 01/12/2026 | 8.75 | 1 |
| 04/15/2025 | 04/16/2025 | 11.50 | 1 |
| 10/08/2024 | 10/08/2024 | 7.25 | 1 |
| 05/21/2024 | 05/21/2024 | 5.50 | 1 |
| 05/21/2024 | 05/21/2024 | 1.00 | 1 |
| 02/06/2024 | 02/09/2024 | 5.50 | 1 |
| 05/30/2023 | 06/01/2023 | 23.00 | 1 |
| 03/08/2023 | 03/08/2023 | 17.00 | 1 |
| 11/22/2022 | 11/23/2022 | 8.50 | 1 |
| 05/31/2022 | 06/01/2022 | 12.00 | 1 |
Mine Details
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Frequently Asked Questions
How many MSHA violations does Darlington Mine have?
Darlington Mine has 47 MSHA violations on record, of which 8 are classified as Significant & Substantial (S&S). Total proposed penalties amount to $10K.
What type of mine is Darlington Mine?
Darlington Mine is a Surface mine producing Stone, located in Arco, Custer County, ID. It currently has 6 employees.
Has anyone been injured or killed at Darlington Mine?
According to MSHA records, Darlington Mine has 0 reported accident/injury records and 0 fatalities on file.
Who operates Darlington Mine?
Darlington Mine is operated by US Calcium LLC and controlled by Halycon LLC; Sharp Resources LLC; Patten Resources LLC. MSHA Mine ID: 1002277.