# Relationship history for MSHA mine 3604185

Current hierarchy: **Polenik Paul → Badger Coal Company Inc → Badger Coal Co Inc**

- 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:** Badger Coal Company Inc → Badger Coal Co Inc; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Polenik Paul Et Al → Badger Coal Co Inc; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Polenik Paul Et Al → Badger Coal Company Inc; 1950-01-01 to current/open; source msha-controller-operator-history