# Relationship history for MSHA mine 4404144

Current hierarchy: **Coleman Donald S → Bonnie 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:** Castle Coal Company Inc → Surface Mine No 1; 1975-05-01 to 1977-05-22; source msha-controller-operator-history
- **controller_controls_mine:** Lester Larry F & Elijah → Surface Mine No 1; 1975-05-01 to 1977-05-22; source msha-controller-operator-history
- **controller_controls_operator:** Lester Larry F & Elijah → Castle Coal Company Inc; 1975-05-01 to 1977-05-22; source msha-controller-operator-history
- **operator_operates_mine:** Bonnie Coal Company Inc → Surface Mine No 1; 1977-05-23 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Coleman Donald S → Surface Mine No 1; 1977-05-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Coleman Donald S → Bonnie Coal Company Inc; 1977-05-23 to current/open; source msha-controller-operator-history