# Relationship history for MSHA mine 1700434

Current hierarchy: **Vincent  Ferraiolo → FERRAIOLO CORP → FARMINGDALE PLANT**

- 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:** W S Williams Construction Company Inc → FARMINGDALE PLANT; 1950-01-01 to 1987-09-14; source msha-controller-operator-history
- **controller_controls_mine:** William S  Williams → FARMINGDALE PLANT; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** William S  Williams → W S Williams Construction Company Inc; 1950-01-01 to 1987-09-14; source msha-controller-operator-history
- **operator_operates_mine:** Wm S Williams Construction Company Inc → FARMINGDALE PLANT; 1987-09-15 to 2002-01-11; source msha-controller-operator-history
- **controller_controls_mine:** Billie L  Vasoll → FARMINGDALE PLANT; 1987-09-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Billie L  Vasoll → Wm S Williams Construction Company Inc; 1987-09-15 to 2002-01-11; source msha-controller-operator-history
- **operator_operates_mine:** FERRAIOLO CORP → FARMINGDALE PLANT; 2002-01-12 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Vincent  Ferraiolo → FARMINGDALE PLANT; 2002-01-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Vincent  Ferraiolo → FERRAIOLO CORP; 2002-01-12 to current/open; source msha-controller-operator-history