# Relationship history for MSHA mine 4703765

Current hierarchy: **Mitchel H  King → Mitch King and Sons Gravel & Trucking Inc → Portable Plant 2**

- 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:** Mitchel H  King → Portable Plant 2; 2007-05-22 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Mitch King and Sons Gravel & Trucking Inc → Portable Plant 2; 2015-08-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mitchel H  King → Mitch King and Sons Gravel & Trucking Inc; 2015-08-02 to current/open; source msha-controller-operator-history