# Relationship history for MSHA mine 1700584

Current hierarchy: **John  Ferraiolo; Vincent  Ferraiolo → Ferraiolo Construction → Portable Pioneer 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

- **controller_controls_mine:** Ronald Paul  MacQuinn Jr → Portable Pioneer Plant; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Vincent  Ferraiolo → Portable Pioneer Plant; 1980-03-01 to 2025-08-19; source msha-controller-operator-history
- **operator_operates_mine:** Harold Mac Quinn Inc → Portable Pioneer Plant; 1987-04-01 to 1988-07-26; source msha-controller-operator-history
- **controller_controls_operator:** Ronald Paul  MacQuinn Jr → Harold Mac Quinn Inc; 1987-04-01 to 1988-07-26; source msha-controller-operator-history
- **operator_operates_mine:** Ferraiolo Construction → Portable Pioneer Plant; 1988-07-27 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Vincent  Ferraiolo → Ferraiolo Construction; 1988-07-27 to 2025-08-19; source msha-controller-operator-history
- **controller_controls_mine:** John  Ferraiolo et al → Portable Pioneer Plant; 2025-08-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** John  Ferraiolo et al → Ferraiolo Construction; 2025-08-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Vincent  Ferraiolo et al → Ferraiolo Construction; 2025-08-20 to current/open; source msha-controller-operator-history