# Relationship history for MSHA mine 3503855

Current hierarchy: **Marty Verona  Kent → Kent's River Bottom Top Soil → Kent's River Bottom Top Soil**

- 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:** Kent's River Bottom Top Soil → Kent's River Bottom Top Soil; 2016-08-29 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Marty Verona  Kent → Kent's River Bottom Top Soil; 2016-08-29 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Marty Verona  Kent → Kent's River Bottom Top Soil; 2016-08-29 to current/open; source msha-controller-operator-history