# Relationship history for MSHA mine 1302211

Current hierarchy: **Mc Carthy- Bush Corp → McCarthy Improvement Company Inc → McCarthy U/G Shop**

- 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:** Mc Carthy Improvement Company Inc → McCarthy U/G Shop; 1996-12-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Mc Carthy- Bush Corp → McCarthy U/G Shop; 1996-12-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mc Carthy- Bush Corp → Mc Carthy Improvement Company Inc; 1996-12-01 to current/open; source msha-controller-operator-history