# Relationship history for MSHA mine 0102501

Current hierarchy: **Jackson Jerry W → Wal-Win Coal Company Inc → Kaiser Bottom 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

- **operator_operates_mine:** Wal-Win Coal Company Inc → Kaiser Bottom Pit; 1982-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Jackson Jerry W → Kaiser Bottom Pit; 1982-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jackson Jerry W → Wal-Win Coal Company Inc; 1982-08-01 to current/open; source msha-controller-operator-history