# Relationship history for MSHA mine 2902261

Current hierarchy: **A Wilfred  Rael → Rael Excavation & Co. → Rael's Gravel Machine**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Rael Excavation & Co. → Rael's Gravel Machine; 2004-01-05 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** A Wilfred  Rael → Rael's Gravel Machine; 2004-01-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** A Wilfred  Rael → Rael Excavation & Co.; 2004-01-05 to current/open; source msha-controller-operator-history