# Relationship history for MSHA mine 4605864

Current hierarchy: **Tracy W  Hylton II → Eller Inc → Eller No 2 Surface (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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** Adkins Buhl → Eller No 2 Surface (1); 1975-11-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** B A Coal Company → Eller No 2 Surface (1); 1978-09-01 to 1993-05-20; source msha-controller-operator-history
- **controller_controls_operator:** Adkins Buhl → B A Coal Company; 1978-09-01 to 1993-05-20; source msha-controller-operator-history
- **controller_controls_mine:** Tracy W  Hylton II → Eller No 2 Surface (1); 1983-07-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Eller Inc → Eller No 2 Surface (1); 1993-05-21 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Tracy W  Hylton II → Eller Inc; 1993-05-21 to current/open; source msha-controller-operator-history