# Relationship history for MSHA mine 3608462

Current hierarchy: **A J  Roman → No 1 Contracting Corp → HARWOOD 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

- **controller_controls_mine:** Pagnotti Enterprises Inc → HARWOOD QUARRY; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** No 1 Contracting Corp → HARWOOD QUARRY; 1994-03-01 to 1996-02-29; source msha-controller-operator-history
- **controller_controls_operator:** Pagnotti Enterprises Inc → No 1 Contracting Corp; 1994-03-01 to 1996-02-29; source msha-controller-operator-history
- **operator_operates_mine:** No 1 Contracting Corp → HARWOOD QUARRY; 1996-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** A J  Roman → HARWOOD QUARRY; 1996-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** A J  Roman → No 1 Contracting Corp; 1996-03-01 to current/open; source msha-controller-operator-history