# Relationship history for MSHA mine 3700204

Current hierarchy: **Peter  Sacco → Sacco Enterprises Inc. → Quarry Road Quarry**

- 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:** Sacco Enterprises Inc. → Quarry Road Quarry; 2007-12-19 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Peter  Sacco → Quarry Road Quarry; 2007-12-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Peter  Sacco → Sacco Enterprises Inc.; 2007-12-19 to current/open; source msha-controller-operator-history