# Relationship history for MSHA mine 4604585

Current hierarchy: **Larue Robert & Lloyd → R & L Coal & Lumber Company → R & L No 1 Mine**

- 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:** Larue Robert & Lloyd → R & L No 1 Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** R & L Coal & Lumber Company → R & L No 1 Mine; 1975-04-21 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Larue Robert & Lloyd → R & L Coal & Lumber Company; 1975-04-21 to current/open; source msha-controller-operator-history