# Relationship history for MSHA mine 3303460

Current hierarchy: **American Electric Power Company Inc → Southern Ohio Coal Company → Raccoon No 3 Prep 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: 2026-10-18T09:31:49.615908+00:00

## Valid-time edges

- **controller_controls_mine:** American Electric Power Company Inc → Raccoon No 3 Prep Plant; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Southern Ohio Coal Company → Raccoon No 3 Prep Plant; 1976-02-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** American Electric Power Company Inc → Southern Ohio Coal Company; 1976-02-26 to current/open; source msha-controller-operator-history