# Relationship history for MSHA mine 1800725

Current hierarchy: **George R  Beener → Tri-Star Mining Inc → Job #15**

- 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:** George R  Beener → Job #15; 1986-05-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Tri-Star Mining Inc → Job #15; 1991-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** George R  Beener → Tri-Star Mining Inc; 1991-07-01 to current/open; source msha-controller-operator-history