# Relationship history for MSHA mine 0203050

Current hierarchy: **Horner James E → Horner Stone Inc → Henderson Quarry**

- 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:** Horner James E → Henderson Quarry; 1997-10-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Horner Stone Inc → Henderson Quarry; 2004-06-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Horner James E → Horner Stone Inc; 2004-06-17 to current/open; source msha-controller-operator-history