# Relationship history for MSHA mine 2102869

Current hierarchy: **Schuh Richard F → Richard F Schuh Company → Crusher 32664**

- 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:** Schuh Richard F → Crusher 32664; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Richard F Schuh Company → Crusher 32664; 1981-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Schuh Richard F → Richard F Schuh Company; 1981-07-01 to current/open; source msha-controller-operator-history