# Relationship history for MSHA mine 0500429

Current hierarchy: **Lionelle Joe E → Lionelle Group → Thunder Mountain**

- 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:** U S Soil Conditioning → Thunder Mountain; 1950-01-01 to 1985-06-11; source msha-controller-operator-history
- **controller_controls_mine:** Lionelle J H → Thunder Mountain; 1950-01-01 to 1985-06-11; source msha-controller-operator-history
- **controller_controls_operator:** Lionelle J H → U S Soil Conditioning; 1950-01-01 to 1985-06-11; source msha-controller-operator-history
- **operator_operates_mine:** Planters Plus International Ltd → Thunder Mountain; 1985-06-12 to 1987-09-30; source msha-controller-operator-history
- **controller_controls_mine:** Horne James → Thunder Mountain; 1985-06-12 to 1987-09-30; source msha-controller-operator-history
- **controller_controls_operator:** Horne James → Planters Plus International Ltd; 1985-06-12 to 1987-09-30; source msha-controller-operator-history
- **operator_operates_mine:** Lionelle Group → Thunder Mountain; 1987-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Lionelle Joe E → Thunder Mountain; 1987-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lionelle Joe E → Lionelle Group; 1987-10-01 to current/open; source msha-controller-operator-history