# Relationship history for MSHA mine 1507306

Current hierarchy: **Asher Paul → Beechwood Coal Company → No 1 Surface**

- 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:** Beechwood Coal Company Inc → No 1 Surface; 1974-08-01 to 1976-11-29; source msha-controller-operator-history
- **controller_controls_mine:** Golden Verlin → No 1 Surface; 1974-08-01 to 1976-11-29; source msha-controller-operator-history
- **controller_controls_operator:** Golden Verlin → Beechwood Coal Company Inc; 1974-08-01 to 1976-11-29; source msha-controller-operator-history
- **operator_operates_mine:** Beechwood Coal Company → No 1 Surface; 1976-11-30 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Asher Paul → No 1 Surface; 1976-11-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Asher Paul → Beechwood Coal Company; 1976-11-30 to current/open; source msha-controller-operator-history