# Relationship history for MSHA mine 0102782

Current hierarchy: **Chamblee Derrell → Nuggett Coal Company Inc → Peacock 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:** Nugget Coal Company Inc → Peacock Mine; 1989-01-01 to 1989-05-11; source msha-controller-operator-history
- **controller_controls_mine:** Otis R  Robison Jr → Peacock Mine; 1989-01-01 to 1989-05-11; source msha-controller-operator-history
- **controller_controls_operator:** Otis R  Robison Jr → Nugget Coal Company Inc; 1989-01-01 to 1989-05-11; source msha-controller-operator-history
- **operator_operates_mine:** Nuggett Coal Company Inc → Peacock Mine; 1989-05-12 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Chamblee Derrell Et Al → Peacock Mine; 1989-05-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Chamblee Derrell Et Al → Nuggett Coal Company Inc; 1989-05-12 to current/open; source msha-controller-operator-history