# Relationship history for MSHA mine 4703829

Current hierarchy: **Mitchel H  King → Mitch King & Sons Gravel and Trucking, Inc. → Sandvik Screen Plant**

- 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

- **controller_controls_mine:** Mitchel H  King → Sandvik Screen Plant; 2007-05-22 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Mitch King and Sons Gravel and Trucking Inc → Sandvik Screen Plant; 2018-05-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mitchel H  King → Mitch King and Sons Gravel and Trucking Inc; 2018-05-23 to current/open; source msha-controller-operator-history