# Relationship history for MSHA mine 4400694

Current hierarchy: **Ratliff Bob H-John W & C B → Belibe Coal Company → No 2 Dock**

- 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:** Little Bear Coal Corp → No 2 Dock; 1950-01-01 to 1974-09-01; source msha-controller-operator-history
- **controller_controls_mine:** Moore Alfred → No 2 Dock; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Moore Alfred → Little Bear Coal Corp; 1950-01-01 to 1974-09-01; source msha-controller-operator-history
- **controller_controls_mine:** Ratliff Bob H-John W & C B → No 2 Dock; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Belibe Coal Company → No 2 Dock; 1974-09-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ratliff Bob H-John W & C B → Belibe Coal Company; 1974-09-02 to current/open; source msha-controller-operator-history