# Relationship history for MSHA mine 0101512

Current hierarchy: **Camp Thomas R → Camp Coal Company Inc → Rosa Strip**

- 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

- **controller_controls_mine:** Camp Thomas R → Rosa Strip; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Camp Coal Company Inc → Rosa Strip; 1976-05-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Camp Thomas R → Camp Coal Company Inc; 1976-05-10 to current/open; source msha-controller-operator-history