# Relationship history for MSHA mine 2200523

Current hierarchy: **Tate County - Ms → Tate County → Tate County**

- 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:** Hill & Hill Construction Company Inc → Tate County; 1980-06-01 to 1992-04-19; source msha-controller-operator-history
- **controller_controls_mine:** L C  Hill → Tate County; 1980-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** L C  Hill → Hill & Hill Construction Company Inc; 1980-06-01 to 1992-04-19; source msha-controller-operator-history
- **operator_operates_mine:** Tate County → Tate County; 1992-04-20 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Tate County - Ms → Tate County; 1992-04-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Tate County - Ms → Tate County; 1992-04-20 to current/open; source msha-controller-operator-history