# Relationship history for MSHA mine 2501015

Current hierarchy: **Bauer Don J → H & M Equipment Company Inc → Wild Rose Pit**

- 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:** Bauer Don J → Wild Rose Pit; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** H & M Equipment Company Inc → Wild Rose Pit; 1984-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bauer Don J → H & M Equipment Company Inc; 1984-04-01 to current/open; source msha-controller-operator-history