# Relationship history for MSHA mine 1511031

Current hierarchy: **Bentley Claude E → C R D Coal Company Inc → No C-12 Mine**

- 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:** Bentley Claude E → No C-12 Mine; 1976-07-27 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** C R D Coal Company Inc → No C-12 Mine; 1978-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bentley Claude E → C R D Coal Company Inc; 1978-01-01 to current/open; source msha-controller-operator-history