# Relationship history for MSHA mine 4003489

Current hierarchy: **Antonio L  Tristan → Antonio Lugo Tristan → Orme Mt 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Antonio Lugo Tristan → Orme Mt Mine; 2018-04-03 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Antonio L  Tristan → Orme Mt Mine; 2018-04-03 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Antonio L  Tristan → Antonio Lugo Tristan; 2018-04-03 to current/open; source msha-controller-operator-history