# Relationship history for MSHA mine 1511770

Current hierarchy: **Hunsaker James Larry & Gary Russell → Hunsaker Coal Company → 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

- **controller_controls_mine:** Hunsaker James Larry & Gary Russell → No 1; 1976-01-26 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Hunsaker Coal Company → No 1; 1979-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Hunsaker James Larry & Gary Russell → Hunsaker Coal Company; 1979-02-01 to current/open; source msha-controller-operator-history