# Relationship history for MSHA mine 3603286

Current hierarchy: **Horan Richard-Raymond & Eugene → 4 D Coal Company → No 1 Slope 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

- **operator_operates_mine:** 4 D Coal Company → No 1 Slope Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Horan Richard-Raymond & Eugene → No 1 Slope Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Horan Richard-Raymond & Eugene → 4 D Coal Company; 1950-01-01 to current/open; source msha-controller-operator-history