# Relationship history for MSHA mine 0404667

Current hierarchy: **Strause Don & Alex Balian → Bccmd → Balance Rock**

- 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:** Bccmd → Balance Rock; 1983-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Strause Don & Alex Balian → Balance Rock; 1983-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Strause Don & Alex Balian → Bccmd; 1983-09-01 to current/open; source msha-controller-operator-history