# Relationship history for MSHA mine 0201878

Current hierarchy: **William E  Hintze → Hintze Development Company Inc → Hintze Development Company Incorporated**

- 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:** Hintze Development Company Inc → Hintze Development Company Incorporated; 1978-03-09 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** William E  Hintze → Hintze Development Company Incorporated; 1978-03-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** William E  Hintze → Hintze Development Company Inc; 1978-03-09 to current/open; source msha-controller-operator-history