# Relationship history for MSHA mine 4405439

Current hierarchy: **Stacy Adam M → G A E A Coal Company → Mine No 4**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** Stacy Adam M → Mine No 4; 1980-04-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** G A E A Coal Company → Mine No 4; 1980-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Stacy Adam M → G A E A Coal Company; 1980-06-01 to current/open; source msha-controller-operator-history