# Relationship history for MSHA mine 3401352

Current hierarchy: **Maready Leroy → Broken Bow Coal Company Inc → Broken Bow #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:** Broken Bow Coal Company Inc → Broken Bow #1; 1982-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Maready Leroy → Broken Bow #1; 1982-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Maready Leroy → Broken Bow Coal Company Inc; 1982-01-01 to current/open; source msha-controller-operator-history