# Relationship history for MSHA mine 2302593

Current hierarchy: **Ritchie  Horner; Alexander  Horner → Horner's Rock Material,LLC → Horner's Rock Material,LLC**

- 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:** Horner's Rock Material,LLC → Horner's Rock Material,LLC; 2025-03-20 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Alexander  Horner et al → Horner's Rock Material,LLC; 2025-03-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Alexander  Horner et al → Horner's Rock Material,LLC; 2025-03-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ritchie  Horner et al → Horner's Rock Material,LLC; 2025-03-20 to current/open; source msha-controller-operator-history