# Relationship history for MSHA mine 1100063

Current hierarchy: **Hubler Kenneth → Henderson County Stone Company → Henderson County Stone Company**

- 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:** Galbraith Rock Products Inc → Henderson County Stone Company; 1950-01-01 to 1984-04-15; source msha-controller-operator-history
- **controller_controls_mine:** Killey Bruce → Henderson County Stone Company; 1950-01-01 to 1984-04-15; source msha-controller-operator-history
- **controller_controls_operator:** Killey Bruce → Galbraith Rock Products Inc; 1950-01-01 to 1984-04-15; source msha-controller-operator-history
- **operator_operates_mine:** Henderson County Stone Company → Henderson County Stone Company; 1984-04-16 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Hubler Kenneth → Henderson County Stone Company; 1984-04-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Hubler Kenneth → Henderson County Stone Company; 1984-04-16 to current/open; source msha-controller-operator-history