# Relationship history for MSHA mine 1517742

Current hierarchy: **American Electric Power Company Inc → AEP Kentucky Coal, L.L.C. → Pettys Fork Mine #1**

- 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

- **controller_controls_mine:** Donn A  Chickering → Pettys Fork Mine #1; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Branham & Baker Coal Company Inc → Pettys Fork Mine #1; 1996-01-01 to 2001-10-29; source msha-controller-operator-history
- **controller_controls_operator:** Donn A  Chickering → Branham & Baker Coal Company Inc; 1996-01-01 to 2001-10-29; source msha-controller-operator-history
- **operator_operates_mine:** AEP Kentucky Coal, L.L.C. → Pettys Fork Mine #1; 2001-10-30 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** American Electric Power Company Inc → Pettys Fork Mine #1; 2001-10-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** American Electric Power Company Inc → AEP Kentucky Coal, L.L.C.; 2001-10-30 to current/open; source msha-controller-operator-history