# Relationship history for MSHA mine 1401732

Current hierarchy: **Roger D  Judd → Endicott Clay Products Company → Kansas White Clay Pit**

- 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:** Roger D  Judd et al → Kansas White Clay Pit; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Endicott Clay Products Company → Kansas White Clay Pit; 2011-06-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Roger D  Judd et al → Endicott Clay Products Company; 2011-06-08 to current/open; source msha-controller-operator-history