# Relationship history for MSHA mine 4603426

Current hierarchy: **Mate Creek Coal Company → Mate Creek Coal Company → Yolyn 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:** Mate Creek Coal Company → Yolyn No 3; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Amherst Coal Company → Yolyn No 3; 1950-01-01 to 1976-01-08; source msha-controller-operator-history
- **controller_controls_mine:** H E  Jones Jr et al → Yolyn No 3; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** H E  Jones Jr et al → Amherst Coal Company; 1950-01-01 to 1976-01-08; source msha-controller-operator-history
- **controller_controls_operator:** Charles T  Jones et al → Amherst Coal Company; 1950-01-01 to 1976-01-08; source msha-controller-operator-history
- **operator_operates_mine:** Mate Creek Coal Company → Yolyn No 3; 1976-01-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mate Creek Coal Company → Mate Creek Coal Company; 1976-01-09 to current/open; source msha-controller-operator-history