# Relationship history for MSHA mine 3603287

Current hierarchy: **Michael S  Carsia → Premium Fine Coal Inc → Premium Fine Coal 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Premium Fine Coal Inc → Premium Fine Coal Inc; 1950-01-01 to 2006-08-12; source msha-controller-operator-history
- **controller_controls_mine:** John  Fiderak → Premium Fine Coal Inc; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** John  Fiderak → Premium Fine Coal Inc; 1950-01-01 to 2006-08-12; source msha-controller-operator-history
- **operator_operates_mine:** Premium Fine Coal Inc → Premium Fine Coal Inc; 2006-08-13 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Michael S  Carsia → Premium Fine Coal Inc; 2006-08-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Michael S  Carsia → Premium Fine Coal Inc; 2006-08-13 to current/open; source msha-controller-operator-history