# Relationship history for MSHA mine 1518723

Current hierarchy: **Steve  Bentley → Valley Mining Co LLC → No. 1 Refuse**

- 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:** Valley Mining Co LLC → No. 1 Refuse; 2004-02-20 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Steve  Bentley → No. 1 Refuse; 2004-02-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Steve  Bentley → Valley Mining Co LLC; 2004-02-20 to current/open; source msha-controller-operator-history