Key Takeaway
Blue Moon Underground Mine is a active underground mine producing Metal, located in Hornitos, Mariposa County, CA. It has 1 violations on record (0 S&S) and $151 in proposed penalties. Operated by Small Mine Development.
Blue Moon Underground Mine
Operator: Small Mine Development
Controller: Keith Jones
Location: Hornitos, Mariposa County, CA
Employees: 5
Recent Violations
View all 1 →| Date | Section | S&S | Negligence | Penalty |
|---|---|---|---|---|
| 11/25/2025 | 49.3(b) | Non-S&S | ModNegligence | $151 |
Inspections
View all 1 →| Begin | End | Hours | Inspectors |
|---|---|---|---|
| 11/25/2025 | 12/04/2025 | 49.00 | 2 |
Mine Details
Related Mines
Frequently Asked Questions
How many MSHA violations does Blue Moon Underground Mine have?
Blue Moon Underground Mine has 1 MSHA violations on record, of which 0 are classified as Significant & Substantial (S&S). Total proposed penalties amount to $151.
What type of mine is Blue Moon Underground Mine?
Blue Moon Underground Mine is a Underground mine producing Metal, located in Hornitos, Mariposa County, CA. It currently has 5 employees.
Has anyone been injured or killed at Blue Moon Underground Mine?
According to MSHA records, Blue Moon Underground Mine has 0 reported accident/injury records and 0 fatalities on file.
Who operates Blue Moon Underground Mine?
Blue Moon Underground Mine is operated by Small Mine Development and controlled by Keith Jones. MSHA Mine ID: 0405990.