# Relationship history for MSHA mine 1700504

Current hierarchy: **John  Ferraiolo; Vincent  Ferraiolo → Ferraiolo Construction Company Inc → Liberty Pit Crusher**

- 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:** Ferraiolo Construction Company Inc → Liberty Pit Crusher; 1980-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Vincent  Ferraiolo → Liberty Pit Crusher; 1980-03-01 to 2025-08-19; source msha-controller-operator-history
- **controller_controls_operator:** Vincent  Ferraiolo → Ferraiolo Construction Company Inc; 1980-03-01 to 2025-08-19; source msha-controller-operator-history
- **controller_controls_mine:** John  Ferraiolo et al → Liberty Pit Crusher; 2025-08-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** John  Ferraiolo et al → Ferraiolo Construction Company Inc; 2025-08-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Vincent  Ferraiolo et al → Ferraiolo Construction Company Inc; 2025-08-20 to current/open; source msha-controller-operator-history