# Relationship history for MSHA mine 2200347

Current hierarchy: **Kight R D → Clay Products Company Inc → Clay Products Company Mill**

- 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

- **operator_operates_mine:** Clay Products Company Inc → Clay Products Company Mill; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Kight R D → Clay Products Company Mill; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kight R D → Clay Products Company Inc; 1950-01-01 to current/open; source msha-controller-operator-history