# Relationship history for MSHA mine 4606480

Current hierarchy: **Ryder Willie A → R & R Coal Contracting Inc → R & R #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:** R & R Coal Contracting Inc → R & R #2; 1982-01-01 to 1982-12-14; source msha-controller-operator-history
- **controller_controls_mine:** Ryder Willie A → R & R #2; 1982-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ryder Willie A → R & R Coal Contracting Inc; 1982-01-01 to 1982-12-14; source msha-controller-operator-history
- **operator_operates_mine:** Joseph Company Inc → R & R #2; 1982-12-15 to 1984-05-23; source msha-controller-operator-history
- **controller_controls_mine:** Fisher Charles → R & R #2; 1982-12-15 to 1984-05-23; source msha-controller-operator-history
- **controller_controls_operator:** Fisher Charles → Joseph Company Inc; 1982-12-15 to 1984-05-23; source msha-controller-operator-history
- **operator_operates_mine:** R & R Coal Contracting Inc → R & R #2; 1984-05-24 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ryder Willie A → R & R Coal Contracting Inc; 1984-05-24 to current/open; source msha-controller-operator-history