# Relationship history for MSHA mine 0900295

Current hierarchy: **Fernandez Manuel → Coronet Quarries Inc → Coronet Quarries**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **operator_operates_mine:** Coronet Quarries Inc → Coronet Quarries; 1950-01-01 to 1979-03-31; source msha-controller-operator-history
- **controller_controls_mine:** Fernandez Manuel → Coronet Quarries; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Fernandez Manuel → Coronet Quarries Inc; 1950-01-01 to 1979-03-31; source msha-controller-operator-history
- **operator_operates_mine:** Gemini Granite Company Inc → Coronet Quarries; 1979-04-01 to 1981-05-11; source msha-controller-operator-history
- **controller_controls_mine:** Evans Gene → Coronet Quarries; 1979-04-01 to 1981-05-11; source msha-controller-operator-history
- **controller_controls_operator:** Evans Gene → Gemini Granite Company Inc; 1979-04-01 to 1981-05-11; source msha-controller-operator-history
- **operator_operates_mine:** Coronet Quarries Inc → Coronet Quarries; 1981-05-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Fernandez Manuel → Coronet Quarries Inc; 1981-05-12 to current/open; source msha-controller-operator-history