# Relationship history for MSHA mine 1512549

Current hierarchy: **George John J → J & R Energies Of Kentucky → Taylor Mine**

- 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:** J & R Energies Of Kentucky → Taylor Mine; 1980-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** George John J Et Al → Taylor Mine; 1980-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** George John J Et Al → J & R Energies Of Kentucky; 1980-09-01 to current/open; source msha-controller-operator-history