# Relationship history for MSHA mine 5001254

Current hierarchy: **Bayless Alice E → Bayless Mining Company → Bayless Mining**

- 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:** Albet Mining Company → Bayless Mining; 1950-01-01 to 1987-08-26; source msha-controller-operator-history
- **controller_controls_mine:** Albet Mining Company → Bayless Mining; 1950-01-01 to 1987-08-26; source msha-controller-operator-history
- **controller_controls_operator:** Albet Mining Company → Albet Mining Company; 1950-01-01 to 1987-08-26; source msha-controller-operator-history
- **operator_operates_mine:** Bayless Mining Company → Bayless Mining; 1987-08-27 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Bayless Alice E → Bayless Mining; 1987-08-27 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bayless Alice E → Bayless Mining Company; 1987-08-27 to current/open; source msha-controller-operator-history