# Relationship history for MSHA mine 0301532

Current hierarchy: **Reasons Billy J → Reasons Construction Company Inc → Reasons Mine No 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:** Reasons Construction Company Inc → Reasons Mine No 1; 1982-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Reasons Billy J → Reasons Mine No 1; 1982-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Reasons Billy J → Reasons Construction Company Inc; 1982-08-01 to current/open; source msha-controller-operator-history