# Relationship history for MSHA mine 1514384

Current hierarchy: **Adams John Edwards → John Boy Coal Company → 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:** Amanda Coal → No 1; 1983-12-01 to 1985-04-14; source msha-controller-operator-history
- **controller_controls_mine:** Adams John Edwards Et Al → No 1; 1983-12-01 to 1985-04-14; source msha-controller-operator-history
- **controller_controls_operator:** Adams John Edwards Et Al → Amanda Coal; 1983-12-01 to 1985-04-14; source msha-controller-operator-history
- **operator_operates_mine:** Gilbert Smith Coal → No 1; 1985-04-15 to 1985-08-27; source msha-controller-operator-history
- **controller_controls_mine:** Smith Gilbert--Jeff Swafford Et Al → No 1; 1985-04-15 to 1985-08-27; source msha-controller-operator-history
- **controller_controls_operator:** Smith Gilbert--Jeff Swafford Et Al → Gilbert Smith Coal; 1985-04-15 to 1985-08-27; source msha-controller-operator-history
- **operator_operates_mine:** M & R Coal Company → No 1; 1985-08-28 to 1987-02-18; source msha-controller-operator-history
- **controller_controls_mine:** Lanham Harvey Et Al → No 1; 1985-08-28 to 1992-06-01; source msha-controller-operator-history
- **controller_controls_operator:** Lanham Harvey Et Al → M & R Coal Company; 1985-08-28 to 1987-02-18; source msha-controller-operator-history
- **operator_operates_mine:** John Boy Coal Company → No 1; 1987-02-19 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Adams John Edwards Et Al → No 1; 1987-02-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Adams John Edwards Et Al → John Boy Coal Company; 1987-02-19 to current/open; source msha-controller-operator-history