# Relationship history for MSHA mine 4703201

Current hierarchy: **Russell  Utecht → Utecht Sand & Gravel Inc. → Utecht Sand & Gravel Inc.**

- 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:** Utecht Sand & Gravel Inc. → Utecht Sand & Gravel Inc.; 1999-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Russell  Utecht → Utecht Sand & Gravel Inc.; 1999-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Russell  Utecht → Utecht Sand & Gravel Inc.; 1999-05-01 to current/open; source msha-controller-operator-history