# Relationship history for MSHA mine 4002547

Current hierarchy: **Campbell Ernest & Neil → E & N Coal Company → No4**

- 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:** Sanders & Wilson Coal Company → No4; 1979-09-01 to 1979-09-09; source msha-controller-operator-history
- **controller_controls_mine:** Ben  Sanders Jr → No4; 1979-09-01 to 1979-09-09; source msha-controller-operator-history
- **controller_controls_operator:** Ben  Sanders Jr → Sanders & Wilson Coal Company; 1979-09-01 to 1979-09-09; source msha-controller-operator-history
- **operator_operates_mine:** Eastern Coal Company Inc → No4; 1979-09-10 to 1980-10-19; source msha-controller-operator-history
- **controller_controls_mine:** Oden Neville A → No4; 1979-09-10 to 1980-10-19; source msha-controller-operator-history
- **controller_controls_operator:** Oden Neville A → Eastern Coal Company Inc; 1979-09-10 to 1980-10-19; source msha-controller-operator-history
- **controller_controls_mine:** Campbell Ernest & Neil → No4; 1980-05-13 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** E & N Coal Company → No4; 1980-10-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Campbell Ernest & Neil → E & N Coal Company; 1980-10-20 to current/open; source msha-controller-operator-history