# Relationship history for MSHA mine 1516273

Current hierarchy: **Burke John Jr → Emmanuel Coal Company Inc → No 2**

- 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:** Burke John Jr → No 2; 1986-06-03 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Emmanuel Coal Company Inc → No 2; 1987-12-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Burke John Jr → Emmanuel Coal Company Inc; 1987-12-01 to current/open; source msha-controller-operator-history