# Relationship history for MSHA mine 0101952

Current hierarchy: **Campbell Ernest → Ten-Al Coal Company Inc → Ten-Al No 5**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** Campbell Ernest → Ten-Al No 5; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Van Coal Corp → Ten-Al No 5; 1978-11-01 to 1979-06-17; source msha-controller-operator-history
- **controller_controls_mine:** Wensink William → Ten-Al No 5; 1978-11-01 to 1979-06-17; source msha-controller-operator-history
- **controller_controls_operator:** Wensink William → Van Coal Corp; 1978-11-01 to 1979-06-17; source msha-controller-operator-history
- **operator_operates_mine:** Ten-Al Coal Company Inc → Ten-Al No 5; 1979-06-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Campbell Ernest → Ten-Al Coal Company Inc; 1979-06-18 to current/open; source msha-controller-operator-history