# Relationship history for MSHA mine 4604947

Current hierarchy: **Bailey John P → Valley Forge Coal & Service Company Inc → Beckley 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:** Nine Button Coal Company → Beckley Mine No 1; 1975-12-12 to 1976-06-24; source msha-controller-operator-history
- **controller_controls_mine:** Crane James Douglas → Beckley Mine No 1; 1975-12-12 to 1976-06-24; source msha-controller-operator-history
- **controller_controls_operator:** Crane James Douglas → Nine Button Coal Company; 1975-12-12 to 1976-06-24; source msha-controller-operator-history
- **operator_operates_mine:** Valley Forge Coal & Service Company Inc → Beckley Mine No 1; 1976-06-25 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Bailey John P → Beckley Mine No 1; 1976-06-25 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bailey John P → Valley Forge Coal & Service Company Inc; 1976-06-25 to current/open; source msha-controller-operator-history