# Relationship history for MSHA mine 2800971

Current hierarchy: **Fadier John W Jr → Birdsboro Slag Products Company Inc → Carpentersville Plant**

- 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:** Birdsboro Slag Products Company Inc → Carpentersville Plant; 1985-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Fadier John W Jr → Carpentersville Plant; 1985-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Fadier John W Jr → Birdsboro Slag Products Company Inc; 1985-04-01 to current/open; source msha-controller-operator-history