# Relationship history for MSHA mine 1701153

Current hierarchy: **Dan  Aceto → Aceto Sand & Gravel LLC → Whale's Back 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:** Aceto Sand & Gravel LLC → Whale's Back Pit; 2025-02-17 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Dan  Aceto → Whale's Back Pit; 2025-02-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Dan  Aceto → Aceto Sand & Gravel LLC; 2025-02-17 to current/open; source msha-controller-operator-history