# Relationship history for MSHA mine 1514237

Current hierarchy: **Yeomans Carl → Alpha Auger Group → Auger No 1**

- 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:** Alpha Auger Group → Auger No 1; 1983-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Yeomans Carl Et Al → Auger No 1; 1983-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Yeomans Carl Et Al → Alpha Auger Group; 1983-09-01 to current/open; source msha-controller-operator-history