# Relationship history for MSHA mine 2003436

Current hierarchy: **Charles  Kiell; Harold  Kiell → Kiell Excavating Sand and Gravel → Kiell 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

- **operator_operates_mine:** Kiell Excavating Sand and Gravel → Kiell Pit; 2010-04-13 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Charles  Kiell et al → Kiell Pit; 2010-04-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Charles  Kiell et al → Kiell Excavating Sand and Gravel; 2010-04-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Harold  Kiell et al → Kiell Excavating Sand and Gravel; 2010-04-13 to current/open; source msha-controller-operator-history