# Relationship history for MSHA mine 3606955

Current hierarchy: **Mischello Matthew → Mischello Coal Company → Stauffer Industrial Park Bank**

- 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

- **operator_operates_mine:** Mischello Coal Company → Stauffer Industrial Park Bank; 1980-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Mischello Matthew → Stauffer Industrial Park Bank; 1980-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mischello Matthew → Mischello Coal Company; 1980-04-01 to current/open; source msha-controller-operator-history