# Relationship history for MSHA mine 1502290

Current hierarchy: **Smith Robert G → Trojan Mining Inc → Trojan #3**

- 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:** Incoal Inc → Trojan #3; 1950-01-01 to 1985-02-14; source msha-controller-operator-history
- **controller_controls_mine:** Adkins Orville → Trojan #3; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Adkins Orville → Incoal Inc; 1950-01-01 to 1985-02-14; source msha-controller-operator-history
- **controller_controls_mine:** Smith Robert G → Trojan #3; 1984-03-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Trojan Mining Inc → Trojan #3; 1985-02-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Smith Robert G → Trojan Mining Inc; 1985-02-15 to current/open; source msha-controller-operator-history