# Relationship history for MSHA mine 3004178

Current hierarchy: **Bruce  Hinz → Rt 19 Gravel LLC → Blue Pit**

- 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:** Rt 19 Gravel LLC → Blue Pit; 2026-02-17 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Bruce  Hinz → Blue Pit; 2026-02-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bruce  Hinz → Rt 19 Gravel LLC; 2026-02-17 to current/open; source msha-controller-operator-history