# Relationship history for MSHA mine 1519924

Current hierarchy: **Tim B  Lusby → JRL COAL INC → SMITH #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:** Tim B  Lusby → SMITH #1; 2017-02-10 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** JRL COAL INC → SMITH #1; 2022-07-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Tim B  Lusby → JRL COAL INC; 2022-07-26 to current/open; source msha-controller-operator-history