# Relationship history for MSHA mine 2400284

Current hierarchy: **Coca Mines Inc → Coca Mines Inc → Hog Heaven Mine**

- 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:** Hog Heaven Partners Ltd → Hog Heaven Mine; 1950-01-01 to 1982-08-16; source msha-controller-operator-history
- **controller_controls_mine:** Superior Oil Co-Congdon & Carey Ltd 5 → Hog Heaven Mine; 1950-01-01 to 1982-08-16; source msha-controller-operator-history
- **controller_controls_operator:** Superior Oil Co-Congdon & Carey Ltd 5 → Hog Heaven Partners Ltd; 1950-01-01 to 1982-08-16; source msha-controller-operator-history
- **operator_operates_mine:** Coca Mines Inc → Hog Heaven Mine; 1982-08-17 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Coca Mines Inc → Hog Heaven Mine; 1982-08-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Coca Mines Inc → Coca Mines Inc; 1982-08-17 to current/open; source msha-controller-operator-history