# Relationship history for MSHA mine 4403879

Current hierarchy: **Horne Charles J → Clinch River Coal Company Inc → Surface Mine No 1**

- 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:** Clinch River Coal Company → Surface Mine No 1; 1974-01-01 to 1976-01-20; source msha-controller-operator-history
- **controller_controls_mine:** Rose Donald M → Surface Mine No 1; 1974-01-01 to 1976-01-20; source msha-controller-operator-history
- **controller_controls_operator:** Rose Donald M → Clinch River Coal Company; 1974-01-01 to 1976-01-20; source msha-controller-operator-history
- **operator_operates_mine:** Clinch River Coal Company Inc → Surface Mine No 1; 1976-01-21 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Horne Charles J → Surface Mine No 1; 1976-01-21 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Horne Charles J → Clinch River Coal Company Inc; 1976-01-21 to current/open; source msha-controller-operator-history