# Relationship history for MSHA mine 2302602

Current hierarchy: **Brandon  Rohlfing; Todd  Schilli → Rubble Stone LLC → Back Forty**

- 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:** Rubble Stone LLC → Back Forty; 2025-12-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Brandon  Rohlfing et al → Back Forty; 2025-12-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Brandon  Rohlfing et al → Rubble Stone LLC; 2025-12-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Todd  Schilli et al → Rubble Stone LLC; 2025-12-01 to current/open; source msha-controller-operator-history