# Relationship history for MSHA mine 1302072

Current hierarchy: **Manaco Corporation → Wendling Quarries Inc → Portable Wash Plant Dept 472**

- 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:** Jerry L  Kinkead → Portable Wash Plant Dept 472; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Aggrecon Corp → Portable Wash Plant Dept 472; 1985-07-01 to 1990-01-31; source msha-controller-operator-history
- **controller_controls_operator:** Jerry L  Kinkead → Aggrecon Corp; 1985-07-01 to 1990-01-31; source msha-controller-operator-history
- **controller_controls_mine:** Manaco Corporation → Portable Wash Plant Dept 472; 1987-03-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Wendling Quarries Inc → Portable Wash Plant Dept 472; 1990-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Manaco Corporation → Wendling Quarries Inc; 1990-02-01 to current/open; source msha-controller-operator-history