# Relationship history for MSHA mine 1507773

Current hierarchy: **Boone Dan → Somerset Coal Company Inc → Arnold Kenney Surface**

- 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:** C & J Mining Company Limited → Arnold Kenney Surface; 1974-01-01 to 1975-03-01; source msha-controller-operator-history
- **controller_controls_mine:** Hornsby Oscar Jr → Arnold Kenney Surface; 1974-01-01 to 1975-03-01; source msha-controller-operator-history
- **controller_controls_operator:** Hornsby Oscar Jr → C & J Mining Company Limited; 1974-01-01 to 1975-03-01; source msha-controller-operator-history
- **operator_operates_mine:** Somerset Coal Company Inc → Arnold Kenney Surface; 1975-03-02 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Boone Dan → Arnold Kenney Surface; 1975-03-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Boone Dan → Somerset Coal Company Inc; 1975-03-02 to current/open; source msha-controller-operator-history