# Relationship history for MSHA mine 4801739

Current hierarchy: **Dick R  Stock → Dick Stock Contracting → Kolberg 130-50**

- 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:** Dick Stock Contracting → Kolberg 130-50; 2009-07-10 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Dick R  Stock → Kolberg 130-50; 2009-07-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Dick R  Stock → Dick Stock Contracting; 2009-07-10 to current/open; source msha-controller-operator-history