# Relationship history for MSHA mine 2902168

Current hierarchy: **Bouldin B J → Seven Western Mining Company Inc → LA RUE IRON PIT**

- 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:** Seven Western Mining Company Inc → LA RUE IRON PIT; 1997-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Bouldin B J → LA RUE IRON PIT; 1997-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bouldin B J → Seven Western Mining Company Inc; 1997-08-01 to current/open; source msha-controller-operator-history