# Relationship history for MSHA mine 1513925

Current hierarchy: **Bray Steven → Bray Mining Company → No 2 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

- **controller_controls_mine:** Gray Letcher Et Al → No 2 Mine; 1983-02-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** G & H Coal Company → No 2 Mine; 1983-02-01 to 1985-03-17; source msha-controller-operator-history
- **controller_controls_mine:** Gray Letcher-Bobby Ray Payne Et Al → No 2 Mine; 1983-02-01 to 1985-03-17; source msha-controller-operator-history
- **controller_controls_operator:** Gray Letcher-Bobby Ray Payne Et Al → G & H Coal Company; 1983-02-01 to 1985-03-17; source msha-controller-operator-history
- **operator_operates_mine:** Legra Coal Company Inc → No 2 Mine; 1985-03-18 to 1987-08-13; source msha-controller-operator-history
- **controller_controls_operator:** Gray Letcher Et Al → Legra Coal Company Inc; 1985-03-18 to 1987-08-13; source msha-controller-operator-history
- **controller_controls_mine:** Davidson Charles Et Al → No 2 Mine; 1987-03-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Davidson Coal Company → No 2 Mine; 1987-08-14 to 1988-08-31; source msha-controller-operator-history
- **controller_controls_operator:** Davidson Charles Et Al → Davidson Coal Company; 1987-08-14 to 1988-08-31; source msha-controller-operator-history
- **operator_operates_mine:** Bray Mining Company → No 2 Mine; 1988-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Bray Steven → No 2 Mine; 1988-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bray Steven → Bray Mining Company; 1988-09-01 to current/open; source msha-controller-operator-history