# Relationship history for MSHA mine 4405085

Current hierarchy: **Ely Arnold → A & M Mining & Trucking → No 3**

- 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:** Baker Ralph → No 3; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Mason Coal Company Inc → No 3; 1978-08-01 to 1983-06-29; source msha-controller-operator-history
- **controller_controls_operator:** Baker Ralph → Mason Coal Company Inc; 1978-08-01 to 1983-06-29; source msha-controller-operator-history
- **controller_controls_mine:** Ely Arnold → No 3; 1982-06-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** A & M Mining & Trucking → No 3; 1983-06-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ely Arnold → A & M Mining & Trucking; 1983-06-30 to current/open; source msha-controller-operator-history