# Relationship history for MSHA mine 4002447

Current hierarchy: **Roger E  West → River Basin Coals Inc → Mine #1**

- 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:** Parrott Kenneth & Johnny A Pack → Mine #1; 1978-06-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Red Oak Mining Company → Mine #1; 1978-07-01 to 1980-05-11; source msha-controller-operator-history
- **controller_controls_operator:** Parrott Kenneth & Johnny A Pack → Red Oak Mining Company; 1978-07-01 to 1980-05-11; source msha-controller-operator-history
- **operator_operates_mine:** River Basin Coals Inc → Mine #1; 1980-05-12 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Roger E  West → Mine #1; 1980-05-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Roger E  West → River Basin Coals Inc; 1980-05-12 to current/open; source msha-controller-operator-history