# Relationship history for MSHA mine 1517832

Current hierarchy: **Edward  Tincher → Sunrise Construction & Excavation Inc → Hector Branch Job**

- 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:** Edward  Hartsock → Hector Branch Job; 1996-02-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** C & A Construction Inc → Hector Branch Job; 1996-08-01 to 1997-01-09; source msha-controller-operator-history
- **controller_controls_operator:** Edward  Hartsock → C & A Construction Inc; 1996-08-01 to 1997-01-09; source msha-controller-operator-history
- **operator_operates_mine:** Sunrise Construction & Excavation Inc → Hector Branch Job; 1997-01-10 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Edward  Tincher → Hector Branch Job; 1997-01-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Edward  Tincher → Sunrise Construction & Excavation Inc; 1997-01-10 to current/open; source msha-controller-operator-history