# Relationship history for MSHA mine 4406152

Current hierarchy: **Jackson Jimmie → Cbs Coal Company → Mine No 4**

- 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:** Barton Lendon → Mine No 4; 1981-03-26 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** C B S Coal Company → Mine No 4; 1984-11-01 to 1985-10-31; source msha-controller-operator-history
- **controller_controls_operator:** Barton Lendon → C B S Coal Company; 1984-11-01 to 1985-10-31; source msha-controller-operator-history
- **operator_operates_mine:** Cbs Coal Company → Mine No 4; 1985-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Jackson Jimmie → Mine No 4; 1985-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jackson Jimmie → Cbs Coal Company; 1985-11-01 to current/open; source msha-controller-operator-history