# Relationship history for MSHA mine 1518776

Current hierarchy: **Roger N  Bentley → J&R Coal Inc. → #7**

- 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:** Roger N  Bentley → #7; 1988-11-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** J&R Coal Inc. → #7; 2004-06-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Roger N  Bentley → J&R Coal Inc.; 2004-06-30 to current/open; source msha-controller-operator-history