# Relationship history for MSHA mine 4404912

Current hierarchy: **B Ray  Thompson → Anchor Red Ash Corp → Loading No 1 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:** Anchor Red Ash Corp → Loading No 1 Dock; 1977-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** B Ray  Thompson → Loading No 1 Dock; 1977-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** B Ray  Thompson → Anchor Red Ash Corp; 1977-11-01 to current/open; source msha-controller-operator-history