# Relationship history for MSHA mine 4405914

Current hierarchy: **Ely Arnold → A & M Mining & Trucking → Mine No 2**

- 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:** A & M Mining & Trucking → Mine No 2; 1982-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Ely Arnold → Mine No 2; 1982-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ely Arnold → A & M Mining & Trucking; 1982-06-01 to current/open; source msha-controller-operator-history