# Relationship history for MSHA mine 1519512

Current hierarchy: **U S Coal Corporation → Fox Knob Coal Co, Inc. → Highwall Miner # 37**

- 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:** Aubra P  Dean et al → Highwall Miner # 37; 1984-07-01 to 2008-04-17; source msha-controller-operator-history
- **controller_controls_mine:** U S Coal Corporation → Highwall Miner # 37; 2008-04-18 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Fox Knob Coal Co, Inc. → Highwall Miner # 37; 2010-07-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** U S Coal Corporation → Fox Knob Coal Co, Inc.; 2010-07-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Aubra P  Dean et al → Fox Knob Coal Co, Inc.; 2010-07-08 to 2008-04-17; source msha-controller-operator-history
- **controller_controls_operator:** Carl E  McAfee et al → Fox Knob Coal Co, Inc.; 2010-07-08 to 2008-04-17; source msha-controller-operator-history